mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1b40e09a12
A blk label set describes a namespace comprised of one or more discontiguous dpa ranges on a single dimm. They may alias with one or more pmem interleave sets that include the given dimm. This is the runtime/volatile configuration infrastructure for sysfs manipulation of 'alt_name', 'uuid', 'size', and 'sector_size'. A later patch will make these settings persistent by writing back the label(s). Unlike pmem namespaces, multiple blk namespaces can be created per region. Once a blk namespace has been created a new seed device (unconfigured child of a parent blk region) is instantiated. As long as a region has 'available_size' != 0 new child namespaces may be created. Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Neil Brown <neilb@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
133 lines
4.0 KiB
C
133 lines
4.0 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_H__
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#define __ND_H__
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#include <linux/libnvdimm.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/ndctl.h>
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#include <linux/types.h>
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#include "label.h"
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struct nvdimm_drvdata {
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struct device *dev;
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int nsindex_size;
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struct nd_cmd_get_config_size nsarea;
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void *data;
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int ns_current, ns_next;
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struct resource dpa;
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struct kref kref;
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};
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struct nd_region_namespaces {
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int count;
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int active;
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};
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static inline struct nd_namespace_index *to_namespace_index(
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struct nvdimm_drvdata *ndd, int i)
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{
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if (i < 0)
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return NULL;
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return ndd->data + sizeof_namespace_index(ndd) * i;
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}
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static inline struct nd_namespace_index *to_current_namespace_index(
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struct nvdimm_drvdata *ndd)
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{
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return to_namespace_index(ndd, ndd->ns_current);
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}
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static inline struct nd_namespace_index *to_next_namespace_index(
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struct nvdimm_drvdata *ndd)
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{
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return to_namespace_index(ndd, ndd->ns_next);
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}
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#define nd_dbg_dpa(r, d, res, fmt, arg...) \
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dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
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(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
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(unsigned long long) (res ? resource_size(res) : 0), \
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(unsigned long long) (res ? res->start : 0), ##arg)
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#define for_each_label(l, label, labels) \
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for (l = 0; (label = labels ? labels[l] : NULL); l++)
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#define for_each_dpa_resource(ndd, res) \
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for (res = (ndd)->dpa.child; res; res = res->sibling)
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#define for_each_dpa_resource_safe(ndd, res, next) \
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for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
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res; res = next, next = next ? next->sibling : NULL)
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struct nd_region {
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struct device dev;
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struct ida ns_ida;
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struct device *ns_seed;
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u16 ndr_mappings;
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u64 ndr_size;
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u64 ndr_start;
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int id;
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void *provider_data;
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struct nd_interleave_set *nd_set;
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struct nd_mapping mapping[0];
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};
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/*
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* Lookup next in the repeating sequence of 01, 10, and 11.
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*/
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static inline unsigned nd_inc_seq(unsigned seq)
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{
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static const unsigned next[] = { 0, 2, 3, 1 };
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return next[seq & 3];
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}
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enum nd_async_mode {
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ND_SYNC,
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ND_ASYNC,
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};
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void wait_nvdimm_bus_probe_idle(struct device *dev);
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void nd_device_register(struct device *dev);
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void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
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int nd_uuid_store(struct device *dev, u8 **uuid_out, const char *buf,
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size_t len);
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ssize_t nd_sector_size_show(unsigned long current_lbasize,
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const unsigned long *supported, char *buf);
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ssize_t nd_sector_size_store(struct device *dev, const char *buf,
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unsigned long *current_lbasize, const unsigned long *supported);
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int __init nvdimm_init(void);
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int __init nd_region_init(void);
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void nvdimm_exit(void);
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void nd_region_exit(void);
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struct nvdimm;
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struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping);
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int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd);
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int nvdimm_init_config_data(struct nvdimm_drvdata *ndd);
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struct nd_region *to_nd_region(struct device *dev);
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int nd_region_to_nstype(struct nd_region *nd_region);
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int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
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u64 nd_region_interleave_set_cookie(struct nd_region *nd_region);
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void nvdimm_bus_lock(struct device *dev);
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void nvdimm_bus_unlock(struct device *dev);
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bool is_nvdimm_bus_locked(struct device *dev);
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void nvdimm_drvdata_release(struct kref *kref);
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void put_ndd(struct nvdimm_drvdata *ndd);
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int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
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void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
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struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
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struct nd_label_id *label_id, resource_size_t start,
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resource_size_t n);
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#endif /* __ND_H__ */
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