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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. */#ifndef __LINUX_ND_H__#define __LINUX_ND_H__#include <linux/fs.h>#include <linux/ndctl.h>#include <linux/device.h>#include <linux/badblocks.h>#include <linux/perf_event.h>
enum nvdimm_event { NVDIMM_REVALIDATE_POISON, NVDIMM_REVALIDATE_REGION,};
enum nvdimm_claim_class { NVDIMM_CCLASS_NONE, NVDIMM_CCLASS_BTT, NVDIMM_CCLASS_BTT2, NVDIMM_CCLASS_PFN, NVDIMM_CCLASS_DAX, NVDIMM_CCLASS_UNKNOWN,};
#define NVDIMM_EVENT_VAR(_id) event_attr_##_id#define NVDIMM_EVENT_PTR(_id) (&event_attr_##_id.attr.attr)
#define NVDIMM_EVENT_ATTR(_name, _id) \ PMU_EVENT_ATTR(_name, NVDIMM_EVENT_VAR(_id), _id, \ nvdimm_events_sysfs_show)
/* Event attribute array index */#define NVDIMM_PMU_FORMAT_ATTR 0#define NVDIMM_PMU_EVENT_ATTR 1#define NVDIMM_PMU_CPUMASK_ATTR 2#define NVDIMM_PMU_NULL_ATTR 3
/** * struct nvdimm_pmu - data structure for nvdimm perf driver * @pmu: pmu data structure for nvdimm performance stats. * @dev: nvdimm device pointer. * @cpu: designated cpu for counter access. * @node: node for cpu hotplug notifier link. * @cpuhp_state: state for cpu hotplug notification. * @arch_cpumask: cpumask to get designated cpu for counter access. */struct nvdimm_pmu { struct pmu pmu; struct device *dev; int cpu; struct hlist_node node; enum cpuhp_state cpuhp_state; /* cpumask provided by arch/platform specific code */ struct cpumask arch_cpumask;};
struct platform_device;
#ifdef CONFIG_PERF_EVENTSextern ssize_t nvdimm_events_sysfs_show(struct device *dev, struct device_attribute *attr, char *page);
int register_nvdimm_pmu(struct nvdimm_pmu *nvdimm, struct platform_device *pdev);void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu);
#elsestatic inline int register_nvdimm_pmu(struct nvdimm_pmu *nvdimm, struct platform_device *pdev){ return -ENXIO;}
static inline void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu) { }#endif
struct nd_device_driver { struct device_driver drv; unsigned long type; int (*probe)(struct device *dev); void (*remove)(struct device *dev); void (*shutdown)(struct device *dev); void (*notify)(struct device *dev, enum nvdimm_event event);};
#define to_nd_device_driver(__drv) container_of_const(__drv, struct nd_device_driver, drv)
/** * struct nd_namespace_common - core infrastructure of a namespace * @force_raw: ignore other personalities for the namespace (e.g. btt) * @dev: device model node * @claim: when set a another personality has taken ownership of the namespace * @claim_class: restrict claim type to a given class * @rw_bytes: access the raw namespace capacity with byte-aligned transfers */struct nd_namespace_common { int force_raw; struct device dev; struct device *claim; enum nvdimm_claim_class claim_class; int (*rw_bytes)(struct nd_namespace_common *, resource_size_t offset, void *buf, size_t size, int rw, unsigned long flags);};
static inline struct nd_namespace_common *to_ndns(struct device *dev){ return container_of(dev, struct nd_namespace_common, dev);}
/** * struct nd_namespace_io - device representation of a persistent memory range * @common: namespace device core infrastructure created by the nd region driver * @res: struct resource conversion of a NFIT SPA table * @size: cached resource_size(@res) for fast path size checks * @addr: virtual address to access the namespace range * @bb: badblocks list for the namespace range */struct nd_namespace_io { struct nd_namespace_common common; struct resource res; resource_size_t size; void *addr; struct badblocks bb;};
/** * struct nd_namespace_pmem - namespace device for dimm-backed interleaved memory * @nsio: device and system physical address range to drive * @lbasize: logical sector size for the namespace in block-device-mode * @alt_name: namespace name supplied in the dimm label * @uuid: namespace name supplied in the dimm label * @id: ida allocated id */struct nd_namespace_pmem { struct nd_namespace_io nsio; unsigned long lbasize; char *alt_name; uuid_t *uuid; int id;};
static inline struct nd_namespace_io *to_nd_namespace_io(const struct device *dev){ return container_of(dev, struct nd_namespace_io, common.dev);}
static inline struct nd_namespace_pmem *to_nd_namespace_pmem(const struct device *dev){ struct nd_namespace_io *nsio = to_nd_namespace_io(dev);
return container_of(nsio, struct nd_namespace_pmem, nsio);}
/** * nvdimm_read_bytes() - synchronously read bytes from an nvdimm namespace * @ndns: device to read * @offset: namespace-relative starting offset * @buf: buffer to fill * @size: transfer length * @flags: process (0) or atomic (1) context * * @buf is up-to-date upon return from this routine. * * Returns: %0 on success or a negative error code on failure */static inline int nvdimm_read_bytes(struct nd_namespace_common *ndns, resource_size_t offset, void *buf, size_t size, unsigned long flags){ return ndns->rw_bytes(ndns, offset, buf, size, READ, flags);}
/** * nvdimm_write_bytes() - synchronously write bytes to an nvdimm namespace * @ndns: device to write * @offset: namespace-relative starting offset * @buf: buffer to drain * @size: transfer length * @flags: process (0) or atomic (1) context * * NVDIMM Namepaces disks do not implement sectors internally. Depending on * the @ndns, the contents of @buf may be in cpu cache, platform buffers, * or on backing memory media upon return from this routine. Flushing * to media is handled internal to the @ndns driver, if at all. * * Returns: %0 on success or a negative error code on failure */static inline int nvdimm_write_bytes(struct nd_namespace_common *ndns, resource_size_t offset, void *buf, size_t size, unsigned long flags){ return ndns->rw_bytes(ndns, offset, buf, size, WRITE, flags);}
#define MODULE_ALIAS_ND_DEVICE(type) \ MODULE_ALIAS("nd:t" __stringify(type) "*")#define ND_DEVICE_MODALIAS_FMT "nd:t%d"
struct nd_region;void nvdimm_region_notify(struct nd_region *nd_region, enum nvdimm_event event);int __must_check __nd_driver_register(struct nd_device_driver *nd_drv, struct module *module, const char *mod_name);static inline void nd_driver_unregister(struct nd_device_driver *drv){ driver_unregister(&drv->drv);}#define nd_driver_register(driver) \ __nd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)#define module_nd_driver(driver) \ module_driver(driver, nd_driver_register, nd_driver_unregister)#endif /* __LINUX_ND_H__ */