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/libnvdimm.h> 18 #include <linux/sizes.h> 19 #include <linux/mutex.h> 20 #include <linux/nd.h> 21 22 extern struct list_head nvdimm_bus_list; 23 extern struct mutex nvdimm_bus_list_mutex; 24 extern int nvdimm_major; 25 26 struct nvdimm_bus { 27 struct nvdimm_bus_descriptor *nd_desc; 28 wait_queue_head_t probe_wait; 29 struct list_head list; 30 struct device dev; 31 int id, probe_active; 32 struct list_head poison_list; 33 struct list_head mapping_list; 34 struct mutex reconfig_mutex; 35 }; 36 37 struct nvdimm { 38 unsigned long flags; 39 void *provider_data; 40 unsigned long cmd_mask; 41 struct device dev; 42 atomic_t busy; 43 int id, num_flush; 44 struct resource *flush_wpq; 45 }; 46 47 /** 48 * struct blk_alloc_info - tracking info for BLK dpa scanning 49 * @nd_mapping: blk region mapping boundaries 50 * @available: decremented in alias_dpa_busy as aliased PMEM is scanned 51 * @busy: decremented in blk_dpa_busy to account for ranges already 52 * handled by alias_dpa_busy 53 * @res: alias_dpa_busy interprets this a free space range that needs to 54 * be truncated to the valid BLK allocation starting DPA, blk_dpa_busy 55 * treats it as a busy range that needs the aliased PMEM ranges 56 * truncated. 57 */ 58 struct blk_alloc_info { 59 struct nd_mapping *nd_mapping; 60 resource_size_t available, busy; 61 struct resource *res; 62 }; 63 64 bool is_nvdimm(struct device *dev); 65 bool is_nd_pmem(struct device *dev); 66 bool is_nd_blk(struct device *dev); 67 struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev); 68 int __init nvdimm_bus_init(void); 69 void nvdimm_bus_exit(void); 70 void nvdimm_devs_exit(void); 71 void nd_region_devs_exit(void); 72 void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev); 73 struct nd_region; 74 void nd_region_create_ns_seed(struct nd_region *nd_region); 75 void nd_region_create_btt_seed(struct nd_region *nd_region); 76 void nd_region_create_pfn_seed(struct nd_region *nd_region); 77 void nd_region_create_dax_seed(struct nd_region *nd_region); 78 void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev); 79 int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus); 80 void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus); 81 void nd_synchronize(void); 82 int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus); 83 int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus); 84 int nvdimm_bus_init_interleave_sets(struct nvdimm_bus *nvdimm_bus); 85 void __nd_device_register(struct device *dev); 86 int nd_match_dimm(struct device *dev, void *data); 87 struct nd_label_id; 88 char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags); 89 bool nd_is_uuid_unique(struct device *dev, u8 *uuid); 90 struct nd_region; 91 struct nvdimm_drvdata; 92 struct nd_mapping; 93 void nd_mapping_free_labels(struct nd_mapping *nd_mapping); 94 resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, 95 struct nd_mapping *nd_mapping, resource_size_t *overlap); 96 resource_size_t nd_blk_available_dpa(struct nd_region *nd_region); 97 resource_size_t nd_region_available_dpa(struct nd_region *nd_region); 98 resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd, 99 struct nd_label_id *label_id); 100 int alias_dpa_busy(struct device *dev, void *data); 101 struct resource *nsblk_add_resource(struct nd_region *nd_region, 102 struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, 103 resource_size_t start); 104 int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd); 105 void get_ndd(struct nvdimm_drvdata *ndd); 106 resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns); 107 void nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns); 108 void __nd_detach_ndns(struct device *dev, struct nd_namespace_common **_ndns); 109 bool nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach, 110 struct nd_namespace_common **_ndns); 111 bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach, 112 struct nd_namespace_common **_ndns); 113 ssize_t nd_namespace_store(struct device *dev, 114 struct nd_namespace_common **_ndns, const char *buf, 115 size_t len); 116 struct nd_pfn *to_nd_pfn_safe(struct device *dev); 117 #endif /* __ND_CORE_H__ */ 118