drivers/nvdimm/nd-core.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
   4  */
   5 #ifndef __ND_CORE_H__
   6 #define __ND_CORE_H__
   7 #include <linux/libnvdimm.h>
   8 #include <linux/device.h>
   9 #include <linux/sizes.h>
  10 #include <linux/mutex.h>
  11 #include <linux/nd.h>
  12 #include "nd.h"
  13
  14 extern struct list_head nvdimm_bus_list;
  15 extern struct mutex nvdimm_bus_list_mutex;
  16 extern int nvdimm_major;
  17 extern struct workqueue_struct *nvdimm_wq;
  18
  19 struct nvdimm_bus {
  20         struct nvdimm_bus_descriptor *nd_desc;
  21         wait_queue_head_t wait;
  22         struct list_head list;
  23         struct device dev;
  24         int id, probe_active;
  25         atomic_t ioctl_active;
  26         struct list_head mapping_list;
  27         struct mutex reconfig_mutex;
  28         struct badrange badrange;
  29 };
  30
  31 struct nvdimm {
  32         unsigned long flags;
  33         void *provider_data;
  34         unsigned long cmd_mask;
  35         struct device dev;
  36         atomic_t busy;
  37         int id, num_flush;
  38         struct resource *flush_wpq;
  39         const char *dimm_id;
  40         struct {
  41                 const struct nvdimm_security_ops *ops;
  42                 unsigned long flags;
  43                 unsigned long ext_flags;
  44                 unsigned int overwrite_tmo;
  45                 struct kernfs_node *overwrite_state;
  46         } sec;
  47         struct delayed_work dwork;
  48         const struct nvdimm_fw_ops *fw_ops;
  49 };
  50
  51 static inline unsigned long nvdimm_security_flags(
  52                 struct nvdimm *nvdimm, enum nvdimm_passphrase_type ptype)
  53 {
  54         u64 flags;
  55         const u64 state_flags = 1UL << NVDIMM_SECURITY_DISABLED
  56                 | 1UL << NVDIMM_SECURITY_LOCKED
  57                 | 1UL << NVDIMM_SECURITY_UNLOCKED
  58                 | 1UL << NVDIMM_SECURITY_OVERWRITE;
  59
  60         if (!nvdimm->sec.ops)
  61                 return 0;
  62
  63         flags = nvdimm->sec.ops->get_flags(nvdimm, ptype);
  64         /* disabled, locked, unlocked, and overwrite are mutually exclusive */
  65         dev_WARN_ONCE(&nvdimm->dev, hweight64(flags & state_flags) > 1,
  66                         "reported invalid security state: %#llx\n",
  67                         (unsigned long long) flags);
  68         return flags;
  69 }
  70 int nvdimm_security_freeze(struct nvdimm *nvdimm);
  71 #if IS_ENABLED(CONFIG_NVDIMM_KEYS)
  72 ssize_t nvdimm_security_store(struct device *dev, const char *buf, size_t len);
  73 void nvdimm_security_overwrite_query(struct work_struct *work);
  74 #else
  75 static inline ssize_t nvdimm_security_store(struct device *dev,
  76                 const char *buf, size_t len)
  77 {
  78         return -EOPNOTSUPP;
  79 }
  80 static inline void nvdimm_security_overwrite_query(struct work_struct *work)
  81 {
  82 }
  83 #endif
  84
  85 bool is_nvdimm(const struct device *dev);
  86 bool is_nd_pmem(const struct device *dev);
  87 bool is_nd_volatile(const struct device *dev);
  88 static inline bool is_nd_region(const struct device *dev)
  89 {
  90         return is_nd_pmem(dev) || is_nd_volatile(dev);
  91 }
  92 static inline bool is_memory(const struct device *dev)
  93 {
  94         return is_nd_pmem(dev) || is_nd_volatile(dev);
  95 }
  96 struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
  97 int __init nvdimm_bus_init(void);
  98 void nvdimm_bus_exit(void);
  99 void nvdimm_devs_exit(void);
 100 struct nd_region;
 101 void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev);
 102 void nd_region_create_ns_seed(struct nd_region *nd_region);
 103 void nd_region_create_btt_seed(struct nd_region *nd_region);
 104 void nd_region_create_pfn_seed(struct nd_region *nd_region);
 105 void nd_region_create_dax_seed(struct nd_region *nd_region);
 106 int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus);
 107 void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
 108 void nd_synchronize(void);
 109 void nd_device_register(struct device *dev);
 110 void nd_device_register_sync(struct device *dev);
 111 struct nd_label_id;
 112 char *nd_label_gen_id(struct nd_label_id *label_id, const uuid_t *uuid,
 113                       u32 flags);
 114 bool nd_is_uuid_unique(struct device *dev, uuid_t *uuid);
 115 struct nd_region;
 116 struct nvdimm_drvdata;
 117 struct nd_mapping;
 118 void nd_mapping_free_labels(struct nd_mapping *nd_mapping);
 119
 120 int __reserve_free_pmem(struct device *dev, void *data);
 121 void release_free_pmem(struct nvdimm_bus *nvdimm_bus,
 122                        struct nd_mapping *nd_mapping);
 123
 124 resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region,
 125                                            struct nd_mapping *nd_mapping);
 126 resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region);
 127 resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
 128                                       struct nd_mapping *nd_mapping);
 129 resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
 130 int nd_region_conflict(struct nd_region *nd_region, resource_size_t start,
 131                 resource_size_t size);
 132 resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
 133                 struct nd_label_id *label_id);
 134 int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd);
 135 void get_ndd(struct nvdimm_drvdata *ndd);
 136 resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
 137 void nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns);
 138 void __nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns);
 139 bool nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
 140                 struct nd_namespace_common **_ndns);
 141 bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
 142                 struct nd_namespace_common **_ndns);
 143 ssize_t nd_namespace_store(struct device *dev,
 144                 struct nd_namespace_common **_ndns, const char *buf,
 145                 size_t len);
 146 struct nd_pfn *to_nd_pfn_safe(struct device *dev);
 147 bool is_nvdimm_bus(struct device *dev);
 148
 149 #if IS_ENABLED(CONFIG_ND_CLAIM)
 150 int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio,
 151                 resource_size_t size);
 152 void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio);
 153 #else
 154 static inline int devm_nsio_enable(struct device *dev,
 155                 struct nd_namespace_io *nsio, resource_size_t size)
 156 {
 157         return -ENXIO;
 158 }
 159
 160 static inline void devm_nsio_disable(struct device *dev,
 161                 struct nd_namespace_io *nsio)
 162 {
 163 }
 164 #endif
 165 #endif /* __ND_CORE_H__ */