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29b9aa0aa3
In preparation for generically mapping flush hint addresses for both the BLK and PMEM use case, provide a generic / reference counted mapping api. Given the fact that a dimm may belong to multiple regions (PMEM and BLK), the flush hint addresses need to be held valid as long as any region associated with the dimm is active. This is similar to the existing BLK-region case where multiple BLK-regions may share an aperture mapping. Up-level this shared / reference-counted mapping capability from the nfit driver to a core nvdimm capability. This eliminates the need for the nd_blk_region.disable() callback. Note that the removal of nfit_spa_map() and related infrastructure is deferred to a later patch. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
100 lines
3.8 KiB
C
100 lines
3.8 KiB
C
/*
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* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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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/libnvdimm.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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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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struct nvdimm_bus {
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struct nvdimm_bus_descriptor *nd_desc;
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wait_queue_head_t probe_wait;
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struct module *module;
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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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struct list_head poison_list;
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struct list_head mapping_list;
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struct mutex reconfig_mutex;
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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;
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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_blk(struct device *dev);
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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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void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
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struct nd_region;
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void nd_region_create_blk_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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void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev);
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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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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_mapping *nd_mapping);
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resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
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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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struct nd_mapping;
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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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#endif /* __ND_CORE_H__ */
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