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87a30e1f05
For good reason, the standard device_lock() is marked
lockdep_set_novalidate_class() because there is simply no sane way to
describe the myriad ways the device_lock() ordered with other locks.
However, that leaves subsystems that know their own local device_lock()
ordering rules to find lock ordering mistakes manually. Instead,
introduce an optional / additional lockdep-enabled lock that a subsystem
can acquire in all the same paths that the device_lock() is acquired.
A conversion of the NFIT driver and NVDIMM subsystem to a
lockdep-validate device_lock() scheme is included. The
debug_nvdimm_lock() implementation implements the correct lock-class and
stacking order for the libnvdimm device topology hierarchy.
Yes, this is a hack, but hopefully it is a useful hack for other
subsystems device_lock() debug sessions. Quoting Greg:
"Yeah, it feels a bit hacky but it's really up to a subsystem to mess up
using it as much as anything else, so user beware :)
I don't object to it if it makes things easier for you to debug."
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/156341210661.292348.7014034644265455704.stgit@dwillia2-desk3.amr.corp.intel.com
348 lines
9.1 KiB
C
348 lines
9.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#ifndef __NFIT_H__
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#define __NFIT_H__
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#include <linux/workqueue.h>
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#include <linux/libnvdimm.h>
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#include <linux/ndctl.h>
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#include <linux/types.h>
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#include <linux/acpi.h>
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#include <acpi/acuuid.h>
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/* ACPI 6.1 */
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#define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba"
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/* http://pmem.io/documents/NVDIMM_DSM_Interface-V1.6.pdf */
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#define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66"
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/* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */
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#define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6"
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#define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e"
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/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
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#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"
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/* http://www.uefi.org/RFIC_LIST (see "Virtual NVDIMM 0x1901") */
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#define UUID_NFIT_DIMM_N_HYPERV "5746c5f2-a9a2-4264-ad0e-e4ddc9e09e80"
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#define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
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| ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
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| ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED)
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#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_HYPERV
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#define NVDIMM_STANDARD_CMDMASK \
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(1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \
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| 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA \
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| 1 << ND_CMD_SET_CONFIG_DATA | 1 << ND_CMD_VENDOR_EFFECT_LOG_SIZE \
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| 1 << ND_CMD_VENDOR_EFFECT_LOG | 1 << ND_CMD_VENDOR)
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/*
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* Command numbers that the kernel needs to know about to handle
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* non-default DSM revision ids
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*/
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enum nvdimm_family_cmds {
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NVDIMM_INTEL_LATCH_SHUTDOWN = 10,
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NVDIMM_INTEL_GET_MODES = 11,
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NVDIMM_INTEL_GET_FWINFO = 12,
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NVDIMM_INTEL_START_FWUPDATE = 13,
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NVDIMM_INTEL_SEND_FWUPDATE = 14,
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NVDIMM_INTEL_FINISH_FWUPDATE = 15,
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NVDIMM_INTEL_QUERY_FWUPDATE = 16,
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NVDIMM_INTEL_SET_THRESHOLD = 17,
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NVDIMM_INTEL_INJECT_ERROR = 18,
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NVDIMM_INTEL_GET_SECURITY_STATE = 19,
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NVDIMM_INTEL_SET_PASSPHRASE = 20,
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NVDIMM_INTEL_DISABLE_PASSPHRASE = 21,
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NVDIMM_INTEL_UNLOCK_UNIT = 22,
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NVDIMM_INTEL_FREEZE_LOCK = 23,
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NVDIMM_INTEL_SECURE_ERASE = 24,
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NVDIMM_INTEL_OVERWRITE = 25,
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NVDIMM_INTEL_QUERY_OVERWRITE = 26,
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NVDIMM_INTEL_SET_MASTER_PASSPHRASE = 27,
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NVDIMM_INTEL_MASTER_SECURE_ERASE = 28,
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};
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#define NVDIMM_INTEL_SECURITY_CMDMASK \
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(1 << NVDIMM_INTEL_GET_SECURITY_STATE | 1 << NVDIMM_INTEL_SET_PASSPHRASE \
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| 1 << NVDIMM_INTEL_DISABLE_PASSPHRASE | 1 << NVDIMM_INTEL_UNLOCK_UNIT \
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| 1 << NVDIMM_INTEL_FREEZE_LOCK | 1 << NVDIMM_INTEL_SECURE_ERASE \
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| 1 << NVDIMM_INTEL_OVERWRITE | 1 << NVDIMM_INTEL_QUERY_OVERWRITE \
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| 1 << NVDIMM_INTEL_SET_MASTER_PASSPHRASE \
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| 1 << NVDIMM_INTEL_MASTER_SECURE_ERASE)
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#define NVDIMM_INTEL_CMDMASK \
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(NVDIMM_STANDARD_CMDMASK | 1 << NVDIMM_INTEL_GET_MODES \
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| 1 << NVDIMM_INTEL_GET_FWINFO | 1 << NVDIMM_INTEL_START_FWUPDATE \
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| 1 << NVDIMM_INTEL_SEND_FWUPDATE | 1 << NVDIMM_INTEL_FINISH_FWUPDATE \
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| 1 << NVDIMM_INTEL_QUERY_FWUPDATE | 1 << NVDIMM_INTEL_SET_THRESHOLD \
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| 1 << NVDIMM_INTEL_INJECT_ERROR | 1 << NVDIMM_INTEL_LATCH_SHUTDOWN \
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| NVDIMM_INTEL_SECURITY_CMDMASK)
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enum nfit_uuids {
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/* for simplicity alias the uuid index with the family id */
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NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL,
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NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
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NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
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NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
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NFIT_DEV_DIMM_N_HYPERV = NVDIMM_FAMILY_HYPERV,
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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_UUID_MAX,
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};
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/*
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* Region format interface codes are stored with the interface as the
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* LSB and the function as the MSB.
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*/
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#define NFIT_FIC_BYTE cpu_to_le16(0x101) /* byte-addressable energy backed */
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#define NFIT_FIC_BLK cpu_to_le16(0x201) /* block-addressable non-energy backed */
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#define NFIT_FIC_BYTEN cpu_to_le16(0x301) /* byte-addressable non-energy backed */
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enum {
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NFIT_BLK_READ_FLUSH = 1,
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NFIT_BLK_DCR_LATCH = 2,
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NFIT_ARS_STATUS_DONE = 0,
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NFIT_ARS_STATUS_BUSY = 1 << 16,
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NFIT_ARS_STATUS_NONE = 2 << 16,
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NFIT_ARS_STATUS_INTR = 3 << 16,
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NFIT_ARS_START_BUSY = 6,
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NFIT_ARS_CAP_NONE = 1,
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NFIT_ARS_F_OVERFLOW = 1,
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NFIT_ARS_TIMEOUT = 90,
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};
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enum nfit_root_notifiers {
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NFIT_NOTIFY_UPDATE = 0x80,
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NFIT_NOTIFY_UC_MEMORY_ERROR = 0x81,
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};
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enum nfit_dimm_notifiers {
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NFIT_NOTIFY_DIMM_HEALTH = 0x81,
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};
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enum nfit_ars_state {
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ARS_REQ_SHORT,
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ARS_REQ_LONG,
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ARS_FAILED,
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};
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struct nfit_spa {
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struct list_head list;
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struct nd_region *nd_region;
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unsigned long ars_state;
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u32 clear_err_unit;
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u32 max_ars;
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struct acpi_nfit_system_address spa[0];
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};
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struct nfit_dcr {
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struct list_head list;
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struct acpi_nfit_control_region dcr[0];
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};
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struct nfit_bdw {
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struct list_head list;
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struct acpi_nfit_data_region bdw[0];
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};
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struct nfit_idt {
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struct list_head list;
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struct acpi_nfit_interleave idt[0];
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};
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struct nfit_flush {
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struct list_head list;
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struct acpi_nfit_flush_address flush[0];
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};
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struct nfit_memdev {
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struct list_head list;
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struct acpi_nfit_memory_map memdev[0];
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};
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enum nfit_mem_flags {
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NFIT_MEM_LSR,
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NFIT_MEM_LSW,
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NFIT_MEM_DIRTY,
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NFIT_MEM_DIRTY_COUNT,
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};
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#define NFIT_DIMM_ID_LEN 22
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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_memory_map *memdev_bdw;
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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 acpi_nfit_interleave *idt_dcr;
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struct acpi_nfit_interleave *idt_bdw;
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struct kernfs_node *flags_attr;
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struct nfit_flush *nfit_flush;
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struct list_head list;
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struct acpi_device *adev;
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struct acpi_nfit_desc *acpi_desc;
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char id[NFIT_DIMM_ID_LEN+1];
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struct resource *flush_wpq;
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unsigned long dsm_mask;
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unsigned long flags;
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u32 dirty_shutdown;
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int family;
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};
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enum scrub_flags {
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ARS_BUSY,
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ARS_CANCEL,
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ARS_VALID,
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ARS_POLL,
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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_header acpi_header;
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struct mutex init_mutex;
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struct list_head memdevs;
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struct list_head flushes;
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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 list_head idts;
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struct nvdimm_bus *nvdimm_bus;
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struct device *dev;
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struct nd_cmd_ars_status *ars_status;
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struct nfit_spa *scrub_spa;
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struct delayed_work dwork;
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struct list_head list;
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struct kernfs_node *scrub_count_state;
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unsigned int max_ars;
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unsigned int scrub_count;
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unsigned int scrub_mode;
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unsigned long scrub_flags;
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unsigned long dimm_cmd_force_en;
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unsigned long bus_cmd_force_en;
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unsigned long bus_nfit_cmd_force_en;
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unsigned int platform_cap;
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unsigned int scrub_tmo;
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int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
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void *iobuf, u64 len, int rw);
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};
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enum scrub_mode {
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HW_ERROR_SCRUB_OFF,
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HW_ERROR_SCRUB_ON,
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};
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enum nd_blk_mmio_selector {
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BDW,
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DCR,
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};
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struct nd_blk_addr {
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union {
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void __iomem *base;
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void *aperture;
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};
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};
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struct nfit_blk {
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struct nfit_blk_mmio {
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struct nd_blk_addr addr;
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u64 size;
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u64 base_offset;
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u32 line_size;
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u32 num_lines;
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u32 table_size;
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struct acpi_nfit_interleave *idt;
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struct acpi_nfit_system_address *spa;
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} mmio[2];
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struct nd_region *nd_region;
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u64 bdw_offset; /* post interleave offset */
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u64 stat_offset;
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u64 cmd_offset;
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u32 dimm_flags;
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};
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extern struct list_head acpi_descs;
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extern struct mutex acpi_desc_lock;
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int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
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enum nfit_ars_state req_type);
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#ifdef CONFIG_X86_MCE
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void nfit_mce_register(void);
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void nfit_mce_unregister(void);
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#else
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static inline void nfit_mce_register(void)
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{
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}
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static inline void nfit_mce_unregister(void)
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{
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}
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#endif
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int nfit_spa_type(struct acpi_nfit_system_address *spa);
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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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#ifdef CONFIG_PROVE_LOCKING
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static inline void nfit_device_lock(struct device *dev)
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{
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device_lock(dev);
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mutex_lock(&dev->lockdep_mutex);
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}
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static inline void nfit_device_unlock(struct device *dev)
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{
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mutex_unlock(&dev->lockdep_mutex);
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device_unlock(dev);
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}
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#else
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static inline void nfit_device_lock(struct device *dev)
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{
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device_lock(dev);
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}
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static inline void nfit_device_unlock(struct device *dev)
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{
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device_unlock(dev);
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}
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#endif
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const guid_t *to_nfit_uuid(enum nfit_uuids id);
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int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
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void acpi_nfit_shutdown(void *data);
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void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
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void __acpi_nvdimm_notify(struct device *dev, u32 event);
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int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
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unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc);
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void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev);
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#endif /* __NFIT_H__ */
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