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| author | Dan Williams <dan.j.williams@intel.com> | 2015-06-17 23:14:46 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-06-25 03:24:10 +0200 |
| commit | bf9bccc14c05dae8caba29df6187c731710f5380 (patch) | |
| tree | cbf00a172bc70598748231748ca2ad14867063ad /drivers/nvdimm/nd.h | |
| parent | libnvdimm: namespace indices: read and validate (diff) | |
| download | linux-bf9bccc14c05dae8caba29df6187c731710f5380.tar.xz linux-bf9bccc14c05dae8caba29df6187c731710f5380.zip | |
libnvdimm: pmem label sets and namespace instantiation.
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>
Diffstat (limited to 'drivers/nvdimm/nd.h')
| -rw-r--r-- | drivers/nvdimm/nd.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 401fa0d5b6ea..03e610cd9f43 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -16,6 +16,7 @@ #include <linux/device.h> #include <linux/mutex.h> #include <linux/ndctl.h> +#include <linux/types.h> #include "label.h" struct nvdimm_drvdata { @@ -25,6 +26,7 @@ struct nvdimm_drvdata { void *data; int ns_current, ns_next; struct resource dpa; + struct kref kref; }; struct nd_region_namespaces { @@ -59,12 +61,19 @@ static inline struct nd_namespace_index *to_next_namespace_index( (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_region { struct device dev; + struct device *ns_seed; u16 ndr_mappings; u64 ndr_size; u64 ndr_start; @@ -88,20 +97,28 @@ enum nd_async_mode { ND_ASYNC, }; +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); 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); 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); +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, |