mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
![Ross Zwisler](/assets/img/avatar_default.png)
The libnvdimm implementation handles allocating dimm address space (DPA) between PMEM and BLK mode interfaces. After DPA has been allocated from a BLK-region to a BLK-namespace the nd_blk driver attaches to handle I/O as a struct bio based block device. Unlike PMEM, BLK is required to handle platform specific details like mmio register formats and memory controller interleave. For this reason the libnvdimm generic nd_blk driver calls back into the bus provider to carry out the I/O. This initial implementation handles the BLK interface defined by the ACPI 6 NFIT [1] and the NVDIMM DSM Interface Example [2] composed from DCR (dimm control region), BDW (block data window), IDT (interleave descriptor) NFIT structures and the hardware register format. [1]: http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf [2]: http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf Cc: Andy Lutomirski <luto@amacapital.net> Cc: Boaz Harrosh <boaz@plexistor.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jens Axboe <axboe@fb.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
83 lines
3 KiB
C
83 lines
3 KiB
C
/*
|
|
* 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_CORE_H__
|
|
#define __ND_CORE_H__
|
|
#include <linux/libnvdimm.h>
|
|
#include <linux/device.h>
|
|
#include <linux/libnvdimm.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/nd.h>
|
|
|
|
extern struct list_head nvdimm_bus_list;
|
|
extern struct mutex nvdimm_bus_list_mutex;
|
|
extern int nvdimm_major;
|
|
|
|
struct nvdimm_bus {
|
|
struct nvdimm_bus_descriptor *nd_desc;
|
|
wait_queue_head_t probe_wait;
|
|
struct module *module;
|
|
struct list_head list;
|
|
struct device dev;
|
|
int id, probe_active;
|
|
struct mutex reconfig_mutex;
|
|
};
|
|
|
|
struct nvdimm {
|
|
unsigned long flags;
|
|
void *provider_data;
|
|
unsigned long *dsm_mask;
|
|
struct device dev;
|
|
atomic_t busy;
|
|
int id;
|
|
};
|
|
|
|
bool is_nvdimm(struct device *dev);
|
|
bool is_nd_pmem(struct device *dev);
|
|
bool is_nd_blk(struct device *dev);
|
|
struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev);
|
|
int __init nvdimm_bus_init(void);
|
|
void nvdimm_bus_exit(void);
|
|
void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
|
|
struct nd_region;
|
|
void nd_region_create_blk_seed(struct nd_region *nd_region);
|
|
void nd_region_create_btt_seed(struct nd_region *nd_region);
|
|
void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev);
|
|
int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus);
|
|
void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
|
|
void nd_synchronize(void);
|
|
int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus);
|
|
int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus);
|
|
int nvdimm_bus_init_interleave_sets(struct nvdimm_bus *nvdimm_bus);
|
|
void __nd_device_register(struct device *dev);
|
|
int nd_match_dimm(struct device *dev, void *data);
|
|
struct nd_label_id;
|
|
char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags);
|
|
bool nd_is_uuid_unique(struct device *dev, u8 *uuid);
|
|
struct nd_region;
|
|
struct nvdimm_drvdata;
|
|
struct nd_mapping;
|
|
resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
|
|
struct nd_mapping *nd_mapping, resource_size_t *overlap);
|
|
resource_size_t nd_blk_available_dpa(struct nd_mapping *nd_mapping);
|
|
resource_size_t nd_region_available_dpa(struct nd_region *nd_region);
|
|
resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
|
|
struct nd_label_id *label_id);
|
|
struct nd_mapping;
|
|
struct resource *nsblk_add_resource(struct nd_region *nd_region,
|
|
struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk,
|
|
resource_size_t start);
|
|
int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd);
|
|
void get_ndd(struct nvdimm_drvdata *ndd);
|
|
resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
|
|
#endif /* __ND_CORE_H__ */
|