681 lines
18 KiB
C
681 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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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 __ND_H__
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#define __ND_H__
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#include <linux/libnvdimm.h>
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#include <linux/badblocks.h>
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#include <linux/blkdev.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/ndctl.h>
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#include <linux/types.h>
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#include <linux/nd.h>
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#include "label.h"
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enum {
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/*
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* Limits the maximum number of block apertures a dimm can
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* support and is an input to the geometry/on-disk-format of a
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* BTT instance
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*/
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ND_MAX_LANES = 256,
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INT_LBASIZE_ALIGNMENT = 64,
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NVDIMM_IO_ATOMIC = 1,
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};
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struct nvdimm_drvdata {
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struct device *dev;
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int nslabel_size;
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struct nd_cmd_get_config_size nsarea;
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void *data;
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bool cxl;
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int ns_current, ns_next;
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struct resource dpa;
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struct kref kref;
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};
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static inline const u8 *nsl_ref_name(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return nd_label->cxl.name;
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return nd_label->efi.name;
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}
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static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, u8 *name)
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{
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if (ndd->cxl)
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return memcpy(name, nd_label->cxl.name, NSLABEL_NAME_LEN);
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return memcpy(name, nd_label->efi.name, NSLABEL_NAME_LEN);
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}
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static inline u8 *nsl_set_name(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, u8 *name)
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{
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if (!name)
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return NULL;
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if (ndd->cxl)
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return memcpy(nd_label->cxl.name, name, NSLABEL_NAME_LEN);
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return memcpy(nd_label->efi.name, name, NSLABEL_NAME_LEN);
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}
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static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le32_to_cpu(nd_label->cxl.slot);
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return __le32_to_cpu(nd_label->efi.slot);
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}
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static inline void nsl_set_slot(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, u32 slot)
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{
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if (ndd->cxl)
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nd_label->cxl.slot = __cpu_to_le32(slot);
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else
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nd_label->efi.slot = __cpu_to_le32(slot);
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}
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static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le64_to_cpu(nd_label->cxl.checksum);
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return __le64_to_cpu(nd_label->efi.checksum);
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}
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static inline void nsl_set_checksum(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u64 checksum)
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{
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if (ndd->cxl)
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nd_label->cxl.checksum = __cpu_to_le64(checksum);
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else
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nd_label->efi.checksum = __cpu_to_le64(checksum);
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}
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static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le32_to_cpu(nd_label->cxl.flags);
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return __le32_to_cpu(nd_label->efi.flags);
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}
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static inline void nsl_set_flags(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, u32 flags)
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{
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if (ndd->cxl)
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nd_label->cxl.flags = __cpu_to_le32(flags);
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else
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nd_label->efi.flags = __cpu_to_le32(flags);
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}
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static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le64_to_cpu(nd_label->cxl.dpa);
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return __le64_to_cpu(nd_label->efi.dpa);
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}
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static inline void nsl_set_dpa(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, u64 dpa)
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{
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if (ndd->cxl)
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nd_label->cxl.dpa = __cpu_to_le64(dpa);
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else
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nd_label->efi.dpa = __cpu_to_le64(dpa);
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}
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static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le64_to_cpu(nd_label->cxl.rawsize);
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return __le64_to_cpu(nd_label->efi.rawsize);
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}
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static inline void nsl_set_rawsize(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u64 rawsize)
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{
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if (ndd->cxl)
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nd_label->cxl.rawsize = __cpu_to_le64(rawsize);
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else
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nd_label->efi.rawsize = __cpu_to_le64(rawsize);
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}
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static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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/* WARN future refactor attempts that break this assumption */
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if (dev_WARN_ONCE(ndd->dev, ndd->cxl,
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"CXL labels do not use the isetcookie concept\n"))
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return 0;
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return __le64_to_cpu(nd_label->efi.isetcookie);
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}
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static inline void nsl_set_isetcookie(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u64 isetcookie)
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{
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if (!ndd->cxl)
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nd_label->efi.isetcookie = __cpu_to_le64(isetcookie);
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}
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static inline bool nsl_validate_isetcookie(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u64 cookie)
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{
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/*
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* Let the EFI and CXL validation comingle, where fields that
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* don't matter to CXL always validate.
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*/
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if (ndd->cxl)
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return true;
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return cookie == __le64_to_cpu(nd_label->efi.isetcookie);
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}
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static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le16_to_cpu(nd_label->cxl.position);
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return __le16_to_cpu(nd_label->efi.position);
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}
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static inline void nsl_set_position(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u16 position)
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{
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if (ndd->cxl)
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nd_label->cxl.position = __cpu_to_le16(position);
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else
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nd_label->efi.position = __cpu_to_le16(position);
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}
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static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return 0;
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return __le16_to_cpu(nd_label->efi.nlabel);
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}
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static inline void nsl_set_nlabel(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u16 nlabel)
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{
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if (!ndd->cxl)
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nd_label->efi.nlabel = __cpu_to_le16(nlabel);
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}
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static inline u16 nsl_get_nrange(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return __le16_to_cpu(nd_label->cxl.nrange);
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return 1;
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}
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static inline void nsl_set_nrange(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u16 nrange)
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{
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if (ndd->cxl)
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nd_label->cxl.nrange = __cpu_to_le16(nrange);
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}
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static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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/*
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* Yes, for some reason the EFI labels convey a massive 64-bit
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* lbasize, that got fixed for CXL.
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*/
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if (ndd->cxl)
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return __le16_to_cpu(nd_label->cxl.lbasize);
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return __le64_to_cpu(nd_label->efi.lbasize);
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}
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static inline void nsl_set_lbasize(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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u64 lbasize)
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{
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if (ndd->cxl)
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nd_label->cxl.lbasize = __cpu_to_le16(lbasize);
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else
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nd_label->efi.lbasize = __cpu_to_le64(lbasize);
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}
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static inline const uuid_t *nsl_get_uuid(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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uuid_t *uuid)
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{
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if (ndd->cxl)
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import_uuid(uuid, nd_label->cxl.uuid);
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else
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import_uuid(uuid, nd_label->efi.uuid);
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return uuid;
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}
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static inline const uuid_t *nsl_set_uuid(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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const uuid_t *uuid)
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{
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if (ndd->cxl)
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export_uuid(nd_label->cxl.uuid, uuid);
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else
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export_uuid(nd_label->efi.uuid, uuid);
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return uuid;
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}
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static inline bool nsl_uuid_equal(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label,
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const uuid_t *uuid)
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{
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uuid_t tmp;
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if (ndd->cxl)
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import_uuid(&tmp, nd_label->cxl.uuid);
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else
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import_uuid(&tmp, nd_label->efi.uuid);
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return uuid_equal(&tmp, uuid);
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}
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static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return nd_label->cxl.uuid;
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return nd_label->efi.uuid;
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}
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bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label, guid_t *guid);
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enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label);
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struct nd_region_data {
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int ns_count;
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int ns_active;
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unsigned int hints_shift;
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void __iomem *flush_wpq[];
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};
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static inline void __iomem *ndrd_get_flush_wpq(struct nd_region_data *ndrd,
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int dimm, int hint)
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{
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unsigned int num = 1 << ndrd->hints_shift;
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unsigned int mask = num - 1;
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return ndrd->flush_wpq[dimm * num + (hint & mask)];
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}
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static inline void ndrd_set_flush_wpq(struct nd_region_data *ndrd, int dimm,
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int hint, void __iomem *flush)
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{
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unsigned int num = 1 << ndrd->hints_shift;
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unsigned int mask = num - 1;
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ndrd->flush_wpq[dimm * num + (hint & mask)] = flush;
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}
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static inline struct nd_namespace_index *to_namespace_index(
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struct nvdimm_drvdata *ndd, int i)
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{
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if (i < 0)
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return NULL;
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return ndd->data + sizeof_namespace_index(ndd) * i;
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}
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static inline struct nd_namespace_index *to_current_namespace_index(
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struct nvdimm_drvdata *ndd)
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{
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return to_namespace_index(ndd, ndd->ns_current);
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}
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static inline struct nd_namespace_index *to_next_namespace_index(
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struct nvdimm_drvdata *ndd)
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{
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return to_namespace_index(ndd, ndd->ns_next);
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}
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unsigned sizeof_namespace_label(struct nvdimm_drvdata *ndd);
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#define efi_namespace_label_has(ndd, field) \
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(!ndd->cxl && offsetof(struct nvdimm_efi_label, field) \
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< sizeof_namespace_label(ndd))
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#define nd_dbg_dpa(r, d, res, fmt, arg...) \
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dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
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(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
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(unsigned long long) (res ? resource_size(res) : 0), \
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(unsigned long long) (res ? res->start : 0), ##arg)
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#define for_each_dpa_resource(ndd, res) \
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for (res = (ndd)->dpa.child; res; res = res->sibling)
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#define for_each_dpa_resource_safe(ndd, res, next) \
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for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
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res; res = next, next = next ? next->sibling : NULL)
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struct nd_percpu_lane {
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int count;
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spinlock_t lock;
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};
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enum nd_label_flags {
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ND_LABEL_REAP,
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};
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struct nd_label_ent {
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struct list_head list;
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unsigned long flags;
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struct nd_namespace_label *label;
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};
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enum nd_mapping_lock_class {
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ND_MAPPING_CLASS0,
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ND_MAPPING_UUID_SCAN,
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};
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struct nd_mapping {
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struct nvdimm *nvdimm;
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u64 start;
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u64 size;
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int position;
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struct list_head labels;
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struct mutex lock;
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/*
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* @ndd is for private use at region enable / disable time for
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* get_ndd() + put_ndd(), all other nd_mapping to ndd
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* conversions use to_ndd() which respects enabled state of the
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* nvdimm.
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*/
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struct nvdimm_drvdata *ndd;
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};
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struct nd_region {
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struct device dev;
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struct ida ns_ida;
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struct ida btt_ida;
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struct ida pfn_ida;
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struct ida dax_ida;
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unsigned long flags;
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struct device *ns_seed;
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struct device *btt_seed;
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struct device *pfn_seed;
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struct device *dax_seed;
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unsigned long align;
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u16 ndr_mappings;
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u64 ndr_size;
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u64 ndr_start;
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int id, num_lanes, ro, numa_node, target_node;
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void *provider_data;
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struct kernfs_node *bb_state;
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struct badblocks bb;
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struct nd_interleave_set *nd_set;
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struct nd_percpu_lane __percpu *lane;
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int (*flush)(struct nd_region *nd_region, struct bio *bio);
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struct nd_mapping mapping[];
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};
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static inline bool nsl_validate_nlabel(struct nd_region *nd_region,
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struct nvdimm_drvdata *ndd,
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struct nd_namespace_label *nd_label)
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{
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if (ndd->cxl)
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return true;
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return nsl_get_nlabel(ndd, nd_label) == nd_region->ndr_mappings;
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}
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/*
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* Lookup next in the repeating sequence of 01, 10, and 11.
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*/
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static inline unsigned nd_inc_seq(unsigned seq)
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{
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static const unsigned next[] = { 0, 2, 3, 1 };
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return next[seq & 3];
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}
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struct btt;
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struct nd_btt {
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struct device dev;
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struct nd_namespace_common *ndns;
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struct btt *btt;
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unsigned long lbasize;
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u64 size;
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uuid_t *uuid;
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int id;
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int initial_offset;
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u16 version_major;
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u16 version_minor;
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};
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enum nd_pfn_mode {
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PFN_MODE_NONE,
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PFN_MODE_RAM,
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PFN_MODE_PMEM,
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};
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struct nd_pfn {
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int id;
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uuid_t *uuid;
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struct device dev;
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unsigned long align;
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unsigned long npfns;
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enum nd_pfn_mode mode;
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struct nd_pfn_sb *pfn_sb;
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struct nd_namespace_common *ndns;
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};
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struct nd_dax {
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struct nd_pfn nd_pfn;
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};
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static inline u32 nd_info_block_reserve(void)
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{
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return ALIGN(SZ_8K, PAGE_SIZE);
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}
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enum nd_async_mode {
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ND_SYNC,
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ND_ASYNC,
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};
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int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
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void wait_nvdimm_bus_probe_idle(struct device *dev);
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void nd_device_register(struct device *dev);
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void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
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void nd_device_notify(struct device *dev, enum nvdimm_event event);
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int nd_uuid_store(struct device *dev, uuid_t **uuid_out, const char *buf,
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size_t len);
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ssize_t nd_size_select_show(unsigned long current_size,
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const unsigned long *supported, char *buf);
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ssize_t nd_size_select_store(struct device *dev, const char *buf,
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unsigned long *current_size, const unsigned long *supported);
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int __init nvdimm_init(void);
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int __init nd_region_init(void);
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int __init nd_label_init(void);
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void nvdimm_exit(void);
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void nd_region_exit(void);
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struct nvdimm;
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extern const struct attribute_group nd_device_attribute_group;
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extern const struct attribute_group nd_numa_attribute_group;
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extern const struct attribute_group *nvdimm_bus_attribute_groups[];
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struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
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int nvdimm_check_config_data(struct device *dev);
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int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
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int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
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int nvdimm_get_config_data(struct nvdimm_drvdata *ndd, void *buf,
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size_t offset, size_t len);
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int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
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void *buf, size_t len);
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long nvdimm_clear_poison(struct device *dev, phys_addr_t phys,
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|
unsigned int len);
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void nvdimm_set_labeling(struct device *dev);
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void nvdimm_set_locked(struct device *dev);
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void nvdimm_clear_locked(struct device *dev);
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|
int nvdimm_security_setup_events(struct device *dev);
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#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
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int nvdimm_security_unlock(struct device *dev);
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|
#else
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static inline int nvdimm_security_unlock(struct device *dev)
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|
{
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|
return 0;
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|
}
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|
#endif
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struct nd_btt *to_nd_btt(struct device *dev);
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|
|
|
struct nd_gen_sb {
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char reserved[SZ_4K - 8];
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__le64 checksum;
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|
};
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|
|
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u64 nd_sb_checksum(struct nd_gen_sb *sb);
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|
#if IS_ENABLED(CONFIG_BTT)
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int nd_btt_probe(struct device *dev, struct nd_namespace_common *ndns);
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bool is_nd_btt(struct device *dev);
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|
struct device *nd_btt_create(struct nd_region *nd_region);
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|
#else
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static inline int nd_btt_probe(struct device *dev,
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|
struct nd_namespace_common *ndns)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline bool is_nd_btt(struct device *dev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct device *nd_btt_create(struct nd_region *nd_region)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
struct nd_pfn *to_nd_pfn(struct device *dev);
|
|
#if IS_ENABLED(CONFIG_NVDIMM_PFN)
|
|
|
|
#define MAX_NVDIMM_ALIGN 4
|
|
|
|
int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns);
|
|
bool is_nd_pfn(struct device *dev);
|
|
struct device *nd_pfn_create(struct nd_region *nd_region);
|
|
struct device *nd_pfn_devinit(struct nd_pfn *nd_pfn,
|
|
struct nd_namespace_common *ndns);
|
|
int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig);
|
|
extern const struct attribute_group *nd_pfn_attribute_groups[];
|
|
#else
|
|
static inline int nd_pfn_probe(struct device *dev,
|
|
struct nd_namespace_common *ndns)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline bool is_nd_pfn(struct device *dev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct device *nd_pfn_create(struct nd_region *nd_region)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int nd_pfn_validate(struct nd_pfn *nd_pfn, const char *sig)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
struct nd_dax *to_nd_dax(struct device *dev);
|
|
#if IS_ENABLED(CONFIG_NVDIMM_DAX)
|
|
int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns);
|
|
bool is_nd_dax(struct device *dev);
|
|
struct device *nd_dax_create(struct nd_region *nd_region);
|
|
#else
|
|
static inline int nd_dax_probe(struct device *dev,
|
|
struct nd_namespace_common *ndns)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline bool is_nd_dax(struct device *dev)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct device *nd_dax_create(struct nd_region *nd_region)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
int nd_region_to_nstype(struct nd_region *nd_region);
|
|
int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
|
|
u64 nd_region_interleave_set_cookie(struct nd_region *nd_region,
|
|
struct nd_namespace_index *nsindex);
|
|
u64 nd_region_interleave_set_altcookie(struct nd_region *nd_region);
|
|
void nvdimm_bus_lock(struct device *dev);
|
|
void nvdimm_bus_unlock(struct device *dev);
|
|
bool is_nvdimm_bus_locked(struct device *dev);
|
|
void nvdimm_check_and_set_ro(struct gendisk *disk);
|
|
void nvdimm_drvdata_release(struct kref *kref);
|
|
void put_ndd(struct nvdimm_drvdata *ndd);
|
|
int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
|
|
void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
|
|
struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
|
|
struct nd_label_id *label_id, resource_size_t start,
|
|
resource_size_t n);
|
|
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
|
|
bool nvdimm_namespace_locked(struct nd_namespace_common *ndns);
|
|
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
|
|
int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
|
|
int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
|
|
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
|
|
char *name);
|
|
unsigned int pmem_sector_size(struct nd_namespace_common *ndns);
|
|
struct range;
|
|
void nvdimm_badblocks_populate(struct nd_region *nd_region,
|
|
struct badblocks *bb, const struct range *range);
|
|
int devm_namespace_enable(struct device *dev, struct nd_namespace_common *ndns,
|
|
resource_size_t size);
|
|
void devm_namespace_disable(struct device *dev,
|
|
struct nd_namespace_common *ndns);
|
|
#if IS_ENABLED(CONFIG_ND_CLAIM)
|
|
/* max struct page size independent of kernel config */
|
|
#define MAX_STRUCT_PAGE_SIZE 64
|
|
int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap);
|
|
#else
|
|
static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
|
|
struct dev_pagemap *pgmap)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
#endif
|
|
int nd_region_activate(struct nd_region *nd_region);
|
|
static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
|
|
unsigned int len)
|
|
{
|
|
if (bb->count) {
|
|
sector_t first_bad;
|
|
int num_bad;
|
|
|
|
return !!badblocks_check(bb, sector, len / 512, &first_bad,
|
|
&num_bad);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
const uuid_t *nd_dev_to_uuid(struct device *dev);
|
|
bool pmem_should_map_pages(struct device *dev);
|
|
#endif /* __ND_H__ */
|