1 /* 2 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 */ 13 #ifndef __ND_CORE_H__ 14 #define __ND_CORE_H__ 15 #include <linux/libnvdimm.h> 16 #include <linux/device.h> 17 #include <linux/sizes.h> 18 #include <linux/mutex.h> 19 #include <linux/nd.h> 20 21 extern struct list_head nvdimm_bus_list; 22 extern struct mutex nvdimm_bus_list_mutex; 23 extern int nvdimm_major; 24 25 struct nvdimm_bus { 26 struct nvdimm_bus_descriptor *nd_desc; 27 wait_queue_head_t probe_wait; 28 struct list_head list; 29 struct device dev; 30 int id, probe_active; 31 struct list_head mapping_list; 32 struct mutex reconfig_mutex; 33 struct badrange badrange; 34 }; 35 36 struct nvdimm { 37 unsigned long flags; 38 void *provider_data; 39 unsigned long cmd_mask; 40 struct device dev; 41 atomic_t busy; 42 int id, num_flush; 43 struct resource *flush_wpq; 44 }; 45 46 /** 47 * struct blk_alloc_info - tracking info for BLK dpa scanning 48 * @nd_mapping: blk region mapping boundaries 49 * @available: decremented in alias_dpa_busy as aliased PMEM is scanned 50 * @busy: decremented in blk_dpa_busy to account for ranges already 51 * handled by alias_dpa_busy 52 * @res: alias_dpa_busy interprets this a free space range that needs to 53 * be truncated to the valid BLK allocation starting DPA, blk_dpa_busy 54 * treats it as a busy range that needs the aliased PMEM ranges 55 * truncated. 56 */ 57 struct blk_alloc_info { 58 struct nd_mapping *nd_mapping; 59 resource_size_t available, busy; 60 struct resource *res; 61 }; 62 63 bool is_nvdimm(struct device *dev); 64 bool is_nd_pmem(struct device *dev); 65 bool is_nd_volatile(struct device *dev); 66 bool is_nd_blk(struct device *dev); 67 static inline bool is_nd_region(struct device *dev) 68 { 69 return is_nd_pmem(dev) || is_nd_blk(dev) || is_nd_volatile(dev); 70 } 71 static inline bool is_memory(struct device *dev) 72 { 73 return is_nd_pmem(dev) || is_nd_volatile(dev); 74 } 75 struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev); 76 int __init nvdimm_bus_init(void); 77 void nvdimm_bus_exit(void); 78 void nvdimm_devs_exit(void); 79 void nd_region_devs_exit(void); 80 void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev); 81 struct nd_region; 82 void nd_region_create_ns_seed(struct nd_region *nd_region); 83 void nd_region_create_btt_seed(struct nd_region *nd_region); 84 void nd_region_create_pfn_seed(struct nd_region *nd_region); 85 void nd_region_create_dax_seed(struct nd_region *nd_region); 86 void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev); 87 int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus); 88 void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus); 89 void nd_synchronize(void); 90 int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus); 91 int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus); 92 int nvdimm_bus_init_interleave_sets(struct nvdimm_bus *nvdimm_bus); 93 void __nd_device_register(struct device *dev); 94 int nd_match_dimm(struct device *dev, void *data); 95 struct nd_label_id; 96 char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags); 97 bool nd_is_uuid_unique(struct device *dev, u8 *uuid); 98 struct nd_region; 99 struct nvdimm_drvdata; 100 struct nd_mapping; 101 void nd_mapping_free_labels(struct nd_mapping *nd_mapping); 102 103 int __reserve_free_pmem(struct device *dev, void *data); 104 void release_free_pmem(struct nvdimm_bus *nvdimm_bus, 105 struct nd_mapping *nd_mapping); 106 107 resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region, 108 struct nd_mapping *nd_mapping); 109 resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region); 110 resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, 111 struct nd_mapping *nd_mapping, resource_size_t *overlap); 112 resource_size_t nd_blk_available_dpa(struct nd_region *nd_region); 113 resource_size_t nd_region_available_dpa(struct nd_region *nd_region); 114 resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd, 115 struct nd_label_id *label_id); 116 int alias_dpa_busy(struct device *dev, void *data); 117 struct resource *nsblk_add_resource(struct nd_region *nd_region, 118 struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, 119 resource_size_t start); 120 int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd); 121 void get_ndd(struct nvdimm_drvdata *ndd); 122 resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns); 123 void nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns); 124 void __nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns); 125 bool nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach, 126 struct nd_namespace_common **_ndns); 127 bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach, 128 struct nd_namespace_common **_ndns); 129 ssize_t nd_namespace_store(struct device *dev, 130 struct nd_namespace_common **_ndns, const char *buf, 131 size_t len); 132 struct nd_pfn *to_nd_pfn_safe(struct device *dev); 133 #endif /* __ND_CORE_H__ */ 134