240 lines
7.5 KiB
C
240 lines
7.5 KiB
C
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/* 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_CORE_H__
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#define __ND_CORE_H__
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#include <linux/libnvdimm.h>
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#include <linux/device.h>
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#include <linux/sizes.h>
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#include <linux/mutex.h>
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#include <linux/nd.h>
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#include "nd.h"
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extern struct list_head nvdimm_bus_list;
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extern struct mutex nvdimm_bus_list_mutex;
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extern int nvdimm_major;
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extern struct workqueue_struct *nvdimm_wq;
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struct nvdimm_bus {
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struct nvdimm_bus_descriptor *nd_desc;
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wait_queue_head_t wait;
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struct list_head list;
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struct device dev;
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int id, probe_active;
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atomic_t ioctl_active;
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struct list_head mapping_list;
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struct mutex reconfig_mutex;
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struct badrange badrange;
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};
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struct nvdimm {
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unsigned long flags;
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void *provider_data;
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unsigned long cmd_mask;
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struct device dev;
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atomic_t busy;
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int id, num_flush;
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struct resource *flush_wpq;
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const char *dimm_id;
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struct {
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const struct nvdimm_security_ops *ops;
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unsigned long flags;
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unsigned long ext_flags;
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unsigned int overwrite_tmo;
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struct kernfs_node *overwrite_state;
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} sec;
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struct delayed_work dwork;
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};
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static inline unsigned long nvdimm_security_flags(
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struct nvdimm *nvdimm, enum nvdimm_passphrase_type ptype)
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{
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u64 flags;
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const u64 state_flags = 1UL << NVDIMM_SECURITY_DISABLED
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| 1UL << NVDIMM_SECURITY_LOCKED
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| 1UL << NVDIMM_SECURITY_UNLOCKED
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| 1UL << NVDIMM_SECURITY_OVERWRITE;
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if (!nvdimm->sec.ops)
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return 0;
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flags = nvdimm->sec.ops->get_flags(nvdimm, ptype);
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/* disabled, locked, unlocked, and overwrite are mutually exclusive */
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dev_WARN_ONCE(&nvdimm->dev, hweight64(flags & state_flags) > 1,
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"reported invalid security state: %#llx\n",
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(unsigned long long) flags);
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return flags;
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}
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int nvdimm_security_freeze(struct nvdimm *nvdimm);
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#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
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ssize_t nvdimm_security_store(struct device *dev, const char *buf, size_t len);
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void nvdimm_security_overwrite_query(struct work_struct *work);
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#else
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static inline ssize_t nvdimm_security_store(struct device *dev,
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const char *buf, size_t len)
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{
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return -EOPNOTSUPP;
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}
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static inline void nvdimm_security_overwrite_query(struct work_struct *work)
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{
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}
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#endif
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/**
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* struct blk_alloc_info - tracking info for BLK dpa scanning
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* @nd_mapping: blk region mapping boundaries
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* @available: decremented in alias_dpa_busy as aliased PMEM is scanned
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* @busy: decremented in blk_dpa_busy to account for ranges already
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* handled by alias_dpa_busy
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* @res: alias_dpa_busy interprets this a free space range that needs to
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* be truncated to the valid BLK allocation starting DPA, blk_dpa_busy
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* treats it as a busy range that needs the aliased PMEM ranges
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* truncated.
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*/
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struct blk_alloc_info {
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struct nd_mapping *nd_mapping;
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resource_size_t available, busy;
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struct resource *res;
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};
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bool is_nvdimm(struct device *dev);
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bool is_nd_pmem(struct device *dev);
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bool is_nd_volatile(struct device *dev);
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bool is_nd_blk(struct device *dev);
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static inline bool is_nd_region(struct device *dev)
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{
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return is_nd_pmem(dev) || is_nd_blk(dev) || is_nd_volatile(dev);
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}
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static inline bool is_memory(struct device *dev)
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{
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return is_nd_pmem(dev) || is_nd_volatile(dev);
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}
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struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
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int __init nvdimm_bus_init(void);
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void nvdimm_bus_exit(void);
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void nvdimm_devs_exit(void);
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void nd_region_devs_exit(void);
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struct nd_region;
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void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev);
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void nd_region_create_ns_seed(struct nd_region *nd_region);
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void nd_region_create_btt_seed(struct nd_region *nd_region);
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void nd_region_create_pfn_seed(struct nd_region *nd_region);
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void nd_region_create_dax_seed(struct nd_region *nd_region);
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int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus);
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void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
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void nd_synchronize(void);
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int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus);
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int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus);
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int nvdimm_bus_init_interleave_sets(struct nvdimm_bus *nvdimm_bus);
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void __nd_device_register(struct device *dev);
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int nd_match_dimm(struct device *dev, void *data);
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struct nd_label_id;
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char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags);
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bool nd_is_uuid_unique(struct device *dev, u8 *uuid);
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struct nd_region;
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struct nvdimm_drvdata;
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struct nd_mapping;
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void nd_mapping_free_labels(struct nd_mapping *nd_mapping);
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int __reserve_free_pmem(struct device *dev, void *data);
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void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
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struct nd_mapping *nd_mapping);
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resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping);
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resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region);
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resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
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struct nd_mapping *nd_mapping, resource_size_t *overlap);
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resource_size_t nd_blk_available_dpa(struct nd_region *nd_region);
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resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
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int nd_region_conflict(struct nd_region *nd_region, resource_size_t start,
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resource_size_t size);
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resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
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struct nd_label_id *label_id);
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int alias_dpa_busy(struct device *dev, void *data);
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struct resource *nsblk_add_resource(struct nd_region *nd_region,
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struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
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resource_size_t start);
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int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd);
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void get_ndd(struct nvdimm_drvdata *ndd);
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resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
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void nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns);
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void __nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns);
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bool nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
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struct nd_namespace_common **_ndns);
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bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
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struct nd_namespace_common **_ndns);
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ssize_t nd_namespace_store(struct device *dev,
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struct nd_namespace_common **_ndns, const char *buf,
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size_t len);
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struct nd_pfn *to_nd_pfn_safe(struct device *dev);
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bool is_nvdimm_bus(struct device *dev);
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#ifdef CONFIG_PROVE_LOCKING
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extern struct class *nd_class;
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enum {
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LOCK_BUS,
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LOCK_NDCTL,
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LOCK_REGION,
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LOCK_DIMM = LOCK_REGION,
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LOCK_NAMESPACE,
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LOCK_CLAIM,
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};
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static inline void debug_nvdimm_lock(struct device *dev)
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{
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if (is_nd_region(dev))
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_REGION);
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else if (is_nvdimm(dev))
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_DIMM);
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else if (is_nd_btt(dev) || is_nd_pfn(dev) || is_nd_dax(dev))
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_CLAIM);
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else if (dev->parent && (is_nd_region(dev->parent)))
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_NAMESPACE);
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else if (is_nvdimm_bus(dev))
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_BUS);
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else if (dev->class && dev->class == nd_class)
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mutex_lock_nested(&dev->lockdep_mutex, LOCK_NDCTL);
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else
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dev_WARN(dev, "unknown lock level\n");
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}
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static inline void debug_nvdimm_unlock(struct device *dev)
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{
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mutex_unlock(&dev->lockdep_mutex);
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}
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static inline void nd_device_lock(struct device *dev)
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{
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device_lock(dev);
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debug_nvdimm_lock(dev);
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}
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static inline void nd_device_unlock(struct device *dev)
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{
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debug_nvdimm_unlock(dev);
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device_unlock(dev);
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}
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#else
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static inline void nd_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 nd_device_unlock(struct device *dev)
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{
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device_unlock(dev);
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}
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static inline void debug_nvdimm_lock(struct device *dev)
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{
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}
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static inline void debug_nvdimm_unlock(struct device *dev)
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{
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}
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#endif
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#endif /* __ND_CORE_H__ */
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