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1cf03c00e7
Address range scrub is a potentially long running process that we want to complete before any pmem regions are registered. Perform this operation asynchronously to allow other drivers to load in the meantime. Platform firmware may have initiated a partial scrub prior to the driver loading, so we must be careful to consume those results before kicking off kernel initiated scrubs on other regions. This rework also makes the registration path more tolerant of scrub errors in that it splits scrubbing into 2 phases. The first phase synchronously waits for a platform-firmware initiated scrub to complete. The second phase scans the remaining address ranges asynchronously and notifies the related driver(s) when the scrub completes. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
209 lines
5.0 KiB
C
209 lines
5.0 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/workqueue.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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#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)
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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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enum nfit_fic {
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NFIT_FIC_BYTE = 0x101, /* byte-addressable energy backed */
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NFIT_FIC_BLK = 0x201, /* block-addressable non-energy backed */
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NFIT_FIC_BYTEN = 0x301, /* byte-addressable non-energy backed */
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};
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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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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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struct nd_region *nd_region;
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unsigned int ars_done:1;
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u32 clear_err_unit;
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u32 max_ars;
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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_idt {
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struct acpi_nfit_interleave *idt;
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struct list_head list;
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};
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struct nfit_flush {
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struct acpi_nfit_flush_address *flush;
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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_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 nfit_flush *nfit_flush;
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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_header acpi_header;
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struct acpi_nfit_header *nfit;
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struct mutex spa_map_mutex;
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struct mutex init_mutex;
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struct list_head spa_maps;
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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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size_t ars_status_size;
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struct work_struct work;
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unsigned int cancel:1;
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unsigned long dimm_dsm_force_en;
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unsigned long bus_dsm_force_en;
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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 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 __pmem *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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void __iomem *nvdimm_flush;
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u32 dimm_flags;
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};
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enum spa_map_type {
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SPA_MAP_CONTROL,
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SPA_MAP_APERTURE,
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};
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struct nfit_spa_mapping {
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struct acpi_nfit_desc *acpi_desc;
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struct acpi_nfit_system_address *spa;
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struct list_head list;
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struct kref kref;
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enum spa_map_type type;
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struct nd_blk_addr addr;
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};
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static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref)
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{
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return container_of(kref, struct nfit_spa_mapping, kref);
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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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const u8 *to_nfit_uuid(enum nfit_uuids id);
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int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz);
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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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