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libnvdimm: Add a poison list and export badblocks

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During region creation, perform Address Range Scrubs (ARS) for the SPA
(System Physical Address) ranges to retrieve known poison locations from
firmware. Add a new data structure 'nd_poison' which is used as a list
in nvdimm_bus to store these poison locations.

When creating a pmem namespace, if there is any known poison associated
with its physical address space, convert the poison ranges to bad sectors
that are exposed using the badblocks interface.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Vishal Verma
2015-12-24 19:21:43 -07:00
committed by Dan Williams
parent d26f73f083
commit 0caeef63e6
6 changed files with 406 additions and 0 deletions
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3
drivers/nvdimm/nd-core.h
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@@ -30,6 +30,7 @@ struct nvdimm_bus {
struct list_head list;
struct device dev;
int id, probe_active;
struct list_head poison_list;
struct mutex reconfig_mutex;
};
@@ -89,4 +90,6 @@ bool __nd_attach_ndns(struct device *dev, struct nd_namespace_common *attach,
ssize_t nd_namespace_store(struct device *dev,
struct nd_namespace_common **_ndns, const char *buf,
size_t len);
int nvdimm_namespace_add_poison(struct gendisk *disk, resource_size_t offset,
struct nd_namespace_common *ndns);
#endif /* __ND_CORE_H__ */