--- /dev/null
+/*
+ * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#ifndef __ND_H__
+#define __ND_H__
+#include <linux/libnvdimm.h>
+#include <linux/blkdev.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/ndctl.h>
+#include <linux/types.h>
+#include "label.h"
+
+enum {
+ /*
+ * Limits the maximum number of block apertures a dimm can
+ * support and is an input to the geometry/on-disk-format of a
+ * BTT instance
+ */
+ ND_MAX_LANES = 256,
+ SECTOR_SHIFT = 9,
+ INT_LBASIZE_ALIGNMENT = 64,
+#if IS_ENABLED(CONFIG_NVDIMM_PFN)
+ ND_PFN_ALIGN = PAGES_PER_SECTION * PAGE_SIZE,
+ ND_PFN_MASK = ND_PFN_ALIGN - 1,
+#else
+ ND_PFN_ALIGN = 0,
+ ND_PFN_MASK = 0,
+#endif
+};
+
+struct nvdimm_drvdata {
+ struct device *dev;
+ int nsindex_size;
+ struct nd_cmd_get_config_size nsarea;
+ void *data;
+ int ns_current, ns_next;
+ struct resource dpa;
+ struct kref kref;
+};
+
+struct nd_region_namespaces {
+ int count;
+ int active;
+};
+
+static inline struct nd_namespace_index *to_namespace_index(
+ struct nvdimm_drvdata *ndd, int i)
+{
+ if (i < 0)
+ return NULL;
+
+ return ndd->data + sizeof_namespace_index(ndd) * i;
+}
+
+static inline struct nd_namespace_index *to_current_namespace_index(
+ struct nvdimm_drvdata *ndd)
+{
+ return to_namespace_index(ndd, ndd->ns_current);
+}
+
+static inline struct nd_namespace_index *to_next_namespace_index(
+ struct nvdimm_drvdata *ndd)
+{
+ return to_namespace_index(ndd, ndd->ns_next);
+}
+
+#define nd_dbg_dpa(r, d, res, fmt, arg...) \
+ dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
+ (r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
+ (unsigned long long) (res ? resource_size(res) : 0), \
+ (unsigned long long) (res ? res->start : 0), ##arg)
+
+#define for_each_label(l, label, labels) \
+ for (l = 0; (label = labels ? labels[l] : NULL); l++)
+
+#define for_each_dpa_resource(ndd, res) \
+ for (res = (ndd)->dpa.child; res; res = res->sibling)
+
+#define for_each_dpa_resource_safe(ndd, res, next) \
+ for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
+ res; res = next, next = next ? next->sibling : NULL)
+
+struct nd_percpu_lane {
+ int count;
+ spinlock_t lock;
+};
+
+struct nd_region {
+ struct device dev;
+ struct ida ns_ida;
+ struct ida btt_ida;
+ struct ida pfn_ida;
+ unsigned long flags;
+ struct device *ns_seed;
+ struct device *btt_seed;
+ struct device *pfn_seed;
+ u16 ndr_mappings;
+ u64 ndr_size;
+ u64 ndr_start;
+ int id, num_lanes, ro, numa_node;
+ void *provider_data;
+ struct nd_interleave_set *nd_set;
+ struct nd_percpu_lane __percpu *lane;
+ struct nd_mapping mapping[0];
+};
+
+struct nd_blk_region {
+ int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
+ void (*disable)(struct nvdimm_bus *nvdimm_bus, struct device *dev);
+ int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
+ void *iobuf, u64 len, int rw);
+ void *blk_provider_data;
+ struct nd_region nd_region;
+};
+
+/*
+ * Lookup next in the repeating sequence of 01, 10, and 11.
+ */
+static inline unsigned nd_inc_seq(unsigned seq)
+{
+ static const unsigned next[] = { 0, 2, 3, 1 };
+
+ return next[seq & 3];
+}
+
+struct btt;
+struct nd_btt {
+ struct device dev;
+ struct nd_namespace_common *ndns;
+ struct btt *btt;
+ unsigned long lbasize;
+ u8 *uuid;
+ int id;
+};
+
+enum nd_pfn_mode {
+ PFN_MODE_NONE,
+ PFN_MODE_RAM,
+ PFN_MODE_PMEM,
+};
+
+struct nd_pfn {
+ int id;
+ u8 *uuid;
+ struct device dev;
+ unsigned long npfns;
+ enum nd_pfn_mode mode;
+ struct nd_pfn_sb *pfn_sb;
+ struct nd_namespace_common *ndns;
+};
+
+enum nd_async_mode {
+ ND_SYNC,
+ ND_ASYNC,
+};
+
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
+void wait_nvdimm_bus_probe_idle(struct device *dev);
+void nd_device_register(struct device *dev);
+void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
+int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
+ size_t len);
+ssize_t nd_sector_size_show(unsigned long current_lbasize,
+ const unsigned long *supported, char *buf);
+ssize_t nd_sector_size_store(struct device *dev, const char *buf,
+ unsigned long *current_lbasize, const unsigned long *supported);
+int __init nvdimm_init(void);
+int __init nd_region_init(void);
+void nvdimm_exit(void);
+void nd_region_exit(void);
+struct nvdimm;
+struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
+int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
+int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
+int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
+ void *buf, size_t len);
+struct nd_btt *to_nd_btt(struct device *dev);
+
+struct nd_gen_sb {
+ char reserved[SZ_4K - 8];
+ __le64 checksum;
+};
+
+u64 nd_sb_checksum(struct nd_gen_sb *sb);
+#if IS_ENABLED(CONFIG_BTT)
+int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata);
+bool is_nd_btt(struct device *dev);
+struct device *nd_btt_create(struct nd_region *nd_region);
+#else
+static inline int nd_btt_probe(struct nd_namespace_common *ndns, void *drvdata)
+{
+ return -ENODEV;
+}
+
+static inline bool is_nd_btt(struct device *dev)
+{
+ return false;
+}
+
+static inline struct device *nd_btt_create(struct nd_region *nd_region)
+{
+ return NULL;
+}
+#endif
+
+struct nd_pfn *to_nd_pfn(struct device *dev);
+#if IS_ENABLED(CONFIG_NVDIMM_PFN)
+int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata);
+bool is_nd_pfn(struct device *dev);
+struct device *nd_pfn_create(struct nd_region *nd_region);
+int nd_pfn_validate(struct nd_pfn *nd_pfn);
+#else
+static inline int nd_pfn_probe(struct nd_namespace_common *ndns, void *drvdata)
+{
+ return -ENODEV;
+}
+
+static inline bool is_nd_pfn(struct device *dev)
+{
+ return false;
+}
+
+static inline struct device *nd_pfn_create(struct nd_region *nd_region)
+{
+ return NULL;
+}
+
+static inline int nd_pfn_validate(struct nd_pfn *nd_pfn)
+{
+ return -ENODEV;
+}
+#endif
+
+struct nd_region *to_nd_region(struct device *dev);
+int nd_region_to_nstype(struct nd_region *nd_region);
+int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
+u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
+void nvdimm_bus_lock(struct device *dev);
+void nvdimm_bus_unlock(struct device *dev);
+bool is_nvdimm_bus_locked(struct device *dev);
+int nvdimm_revalidate_disk(struct gendisk *disk);
+void nvdimm_drvdata_release(struct kref *kref);
+void put_ndd(struct nvdimm_drvdata *ndd);
+int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
+void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
+struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
+ struct nd_label_id *label_id, resource_size_t start,
+ resource_size_t n);
+resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
+struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
+int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
+int nvdimm_namespace_detach_btt(struct nd_namespace_common *ndns);
+const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
+ char *name);
+int nd_blk_region_init(struct nd_region *nd_region);
+void __nd_iostat_start(struct bio *bio, unsigned long *start);
+static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
+{
+ struct gendisk *disk = bio->bi_bdev->bd_disk;
+
+ if (!blk_queue_io_stat(disk->queue))
+ return false;
+
+ __nd_iostat_start(bio, start);
+ return true;
+}
+void nd_iostat_end(struct bio *bio, unsigned long start);
+resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk);
+const u8 *nd_dev_to_uuid(struct device *dev);
+bool pmem_should_map_pages(struct device *dev);
+#endif /* __ND_H__ */
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