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A complete label set is a PMEM-label per-dimm per-interleave-set where all the UUIDs match and the interleave set cookie matches the hosting interleave set. Present sysfs attributes for manipulation of a PMEM-namespace's 'alt_name', 'uuid', and 'size' attributes. A later patch will make these settings persistent by writing back the label. Note that PMEM allocations grow forwards from the start of an interleave set (lowest dimm-physical-address (DPA)). BLK-namespaces that alias with a PMEM interleave set will grow allocations backward from the highest DPA. 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>
121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/*
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* libnvdimm - Non-volatile-memory Devices Subsystem
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*
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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 __LIBNVDIMM_H__
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#define __LIBNVDIMM_H__
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#include <linux/sizes.h>
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#include <linux/types.h>
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enum {
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/* when a dimm supports both PMEM and BLK access a label is required */
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NDD_ALIASING = 1 << 0,
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/* need to set a limit somewhere, but yes, this is likely overkill */
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ND_IOCTL_MAX_BUFLEN = SZ_4M,
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ND_CMD_MAX_ELEM = 4,
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ND_CMD_MAX_ENVELOPE = 16,
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ND_CMD_ARS_STATUS_MAX = SZ_4K,
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ND_MAX_MAPPINGS = 32,
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};
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extern struct attribute_group nvdimm_bus_attribute_group;
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extern struct attribute_group nvdimm_attribute_group;
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extern struct attribute_group nd_device_attribute_group;
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extern struct attribute_group nd_region_attribute_group;
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extern struct attribute_group nd_mapping_attribute_group;
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struct nvdimm;
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struct nvdimm_bus_descriptor;
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typedef int (*ndctl_fn)(struct nvdimm_bus_descriptor *nd_desc,
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struct nvdimm *nvdimm, unsigned int cmd, void *buf,
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unsigned int buf_len);
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struct nd_namespace_label;
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struct nvdimm_drvdata;
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struct nd_mapping {
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struct nvdimm *nvdimm;
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struct nd_namespace_label **labels;
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u64 start;
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u64 size;
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/*
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* @ndd is for private use at region enable / disable time for
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* get_ndd() + put_ndd(), all other nd_mapping to ndd
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* conversions use to_ndd() which respects enabled state of the
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* nvdimm.
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*/
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struct nvdimm_drvdata *ndd;
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};
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struct nvdimm_bus_descriptor {
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const struct attribute_group **attr_groups;
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unsigned long dsm_mask;
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char *provider_name;
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ndctl_fn ndctl;
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};
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struct nd_cmd_desc {
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int in_num;
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int out_num;
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u32 in_sizes[ND_CMD_MAX_ELEM];
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int out_sizes[ND_CMD_MAX_ELEM];
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};
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struct nd_interleave_set {
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u64 cookie;
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};
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struct nd_region_desc {
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struct resource *res;
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struct nd_mapping *nd_mapping;
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u16 num_mappings;
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const struct attribute_group **attr_groups;
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struct nd_interleave_set *nd_set;
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void *provider_data;
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};
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struct nvdimm_bus;
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struct device;
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struct module;
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struct nvdimm_bus *__nvdimm_bus_register(struct device *parent,
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struct nvdimm_bus_descriptor *nfit_desc, struct module *module);
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#define nvdimm_bus_register(parent, desc) \
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__nvdimm_bus_register(parent, desc, THIS_MODULE)
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void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
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struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
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struct nvdimm *to_nvdimm(struct device *dev);
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struct nd_region *to_nd_region(struct device *dev);
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struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
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const char *nvdimm_name(struct nvdimm *nvdimm);
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void *nvdimm_provider_data(struct nvdimm *nvdimm);
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void *nd_region_provider_data(struct nd_region *nd_region);
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struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
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const struct attribute_group **groups, unsigned long flags,
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unsigned long *dsm_mask);
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const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
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const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
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u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,
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const struct nd_cmd_desc *desc, int idx, void *buf);
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u32 nd_cmd_out_size(struct nvdimm *nvdimm, int cmd,
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const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
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const u32 *out_field);
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int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count);
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struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus,
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struct nd_region_desc *ndr_desc);
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struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus,
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struct nd_region_desc *ndr_desc);
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struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus,
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struct nd_region_desc *ndr_desc);
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u64 nd_fletcher64(void *addr, size_t len, bool le);
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#endif /* __LIBNVDIMM_H__ */
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