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Most discovery/configuration of the nvdimm-subsystem is done via sysfs
attributes. However, some nvdimm_bus instances, particularly the
ACPI.NFIT bus, define a small set of messages that can be passed to the
platform. For convenience we derive the initial libnvdimm-ioctl command
formats directly from the NFIT DSM Interface Example formats.
ND_CMD_SMART: media health and diagnostics
ND_CMD_GET_CONFIG_SIZE: size of the label space
ND_CMD_GET_CONFIG_DATA: read label space
ND_CMD_SET_CONFIG_DATA: write label space
ND_CMD_VENDOR: vendor-specific command passthrough
ND_CMD_ARS_CAP: report address-range-scrubbing capabilities
ND_CMD_ARS_START: initiate scrubbing
ND_CMD_ARS_STATUS: report on scrubbing state
ND_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events
If a platform later defines different commands than this set it is
straightforward to extend support to those formats.
Most of the commands target a specific dimm. However, the
address-range-scrubbing commands target the bus. The 'commands'
attribute in sysfs of an nvdimm_bus, or nvdimm, enumerate the supported
commands for that object.
Cc: <linux-acpi@vger.kernel.org>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reported-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
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* NVDIMM Firmware Interface Table - NFIT
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*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef __NFIT_H__
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#define __NFIT_H__
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#include <linux/libnvdimm.h>
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#include <linux/types.h>
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#include <linux/uuid.h>
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#include <linux/acpi.h>
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#include <acpi/acuuid.h>
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#define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
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#define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
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enum nfit_uuids {
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NFIT_SPA_VOLATILE,
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NFIT_SPA_PM,
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NFIT_SPA_DCR,
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NFIT_SPA_BDW,
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NFIT_SPA_VDISK,
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NFIT_SPA_VCD,
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NFIT_SPA_PDISK,
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NFIT_SPA_PCD,
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NFIT_DEV_BUS,
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NFIT_DEV_DIMM,
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NFIT_UUID_MAX,
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};
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struct nfit_spa {
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struct acpi_nfit_system_address *spa;
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struct list_head list;
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};
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struct nfit_dcr {
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struct acpi_nfit_control_region *dcr;
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struct list_head list;
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};
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struct nfit_bdw {
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struct acpi_nfit_data_region *bdw;
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struct list_head list;
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};
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struct nfit_memdev {
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struct acpi_nfit_memory_map *memdev;
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struct list_head list;
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};
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/* assembled tables for a given dimm/memory-device */
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struct nfit_mem {
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struct nvdimm *nvdimm;
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struct acpi_nfit_memory_map *memdev_dcr;
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struct acpi_nfit_memory_map *memdev_pmem;
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struct acpi_nfit_control_region *dcr;
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struct acpi_nfit_data_region *bdw;
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struct acpi_nfit_system_address *spa_dcr;
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struct acpi_nfit_system_address *spa_bdw;
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struct list_head list;
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struct acpi_device *adev;
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unsigned long dsm_mask;
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};
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struct acpi_nfit_desc {
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struct nvdimm_bus_descriptor nd_desc;
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struct acpi_table_nfit *nfit;
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struct list_head memdevs;
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struct list_head dimms;
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struct list_head spas;
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struct list_head dcrs;
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struct list_head bdws;
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struct nvdimm_bus *nvdimm_bus;
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struct device *dev;
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unsigned long dimm_dsm_force_en;
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};
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static inline struct acpi_nfit_memory_map *__to_nfit_memdev(
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struct nfit_mem *nfit_mem)
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{
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if (nfit_mem->memdev_dcr)
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return nfit_mem->memdev_dcr;
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return nfit_mem->memdev_pmem;
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}
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static inline struct acpi_nfit_desc *to_acpi_desc(
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struct nvdimm_bus_descriptor *nd_desc)
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{
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return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
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}
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#endif /* __NFIT_H__ */
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