linux-toradex.git/include/linux/nd.h, branch v4.11-rc3

libnvdimm, namespace: sort namespaces by dpa at init

2016-10-07T16:20:53+00:00

Add more determinism to initial namespace device-name assignments by
sorting the namespaces by starting dpa.

Signed-off-by: Dan Williams

libnvdimm, namespace: allow multiple pmem-namespaces per region at scan time

2016-10-07T16:20:53+00:00

If label scanning finds multiple valid pmem namespaces allow them to be
surfaced rather than fail namespace scanning. Support for creating
multiple namespaces per region is saved for a later patch.

Note that this adds some new error messages to clarify which of the pmem
namespaces in the set are potentially impacted by invalid labels.

Signed-off-by: Dan Williams

pmem: kill __pmem address space

2016-07-13T02:25:38+00:00

The __pmem address space was meant to annotate codepaths that touch
persistent memory and need to coordinate a call to wmb_pmem().  Now that
wmb_pmem() is gone, there is little need to keep this annotation.

Cc: Christoph Hellwig 
Cc: Ross Zwisler 
Signed-off-by: Dan Williams

libnvdimm, pmem: flush posted-write queues on shutdown

2016-07-12T22:13:48+00:00

Commit writes to media on system shutdown or pmem driver unload.

Signed-off-by: Dan Williams

libnvdimm, pmem, pfn: make pmem_rw_bytes generic and refactor pfn setup

2016-04-22T19:26:23+00:00

In preparation for providing an alternative (to block device) access
mechanism to persistent memory, convert pmem_rw_bytes() to
nsio_rw_bytes().  This allows ->rw_bytes() functionality without
requiring a 'struct pmem_device' to be instantiated.

In other words, when ->rw_bytes() is in use i/o is driven through
'struct nd_namespace_io', otherwise it is driven through 'struct
pmem_device' and the block layer.  This consolidates the disjoint calls
to devm_exit_badblocks() and devm_memunmap() into a common
devm_nsio_disable() and cleans up the init path to use a unified
pmem_attach_disk() implementation.

Reviewed-by: Johannes Thumshirn 
Signed-off-by: Dan Williams

libnvdimm, blk: move i/o infrastructure to nd_namespace_blk

2016-04-22T19:26:23+00:00

Consolidate the information for issuing i/o to a blk-namespace, and
eliminate some pointer chasing.

Reviewed-by: Johannes Thumshirn 
Signed-off-by: Dan Williams

libnvdimm: async notification support

2016-03-05T20:24:06+00:00

In preparation for asynchronous address range scrub support add an
ability for the pmem driver to dynamically consume address range scrub
results.

Signed-off-by: Dan Williams

libnvdimm: infrastructure for btt devices

2015-06-25T08:20:04+00:00

NVDIMM namespaces, in addition to accepting "struct bio" based requests,
also have the capability to perform byte-aligned accesses.  By default
only the bio/block interface is used.  However, if another driver can
make effective use of the byte-aligned capability it can claim namespace
interface and use the byte-aligned ->rw_bytes() interface.

The BTT driver is the initial first consumer of this mechanism to allow
adding atomic sector update semantics to a pmem or blk namespace.  This
patch is the sysfs infrastructure to allow configuring a BTT instance
for a namespace.  Enabling that BTT and performing i/o is in a
subsequent patch.

Cc: Greg KH 
Cc: Neil Brown 
Signed-off-by: Dan Williams

libnvdimm: blk labels and namespace instantiation

2015-06-25T01:24:10+00:00

A blk label set describes a namespace comprised of one or more
discontiguous dpa ranges on a single dimm.  They may alias with one or
more pmem interleave sets that include the given dimm.

This is the runtime/volatile configuration infrastructure for sysfs
manipulation of 'alt_name', 'uuid', 'size', and 'sector_size'.  A later
patch will make these settings persistent by writing back the label(s).

Unlike pmem namespaces, multiple blk namespaces can be created per
region.  Once a blk namespace has been created a new seed device
(unconfigured child of a parent blk region) is instantiated.  As long as
a region has 'available_size' != 0 new child namespaces may be created.

Cc: Greg KH 
Cc: Neil Brown 
Acked-by: Christoph Hellwig 
Signed-off-by: Dan Williams

libnvdimm: pmem label sets and namespace instantiation.

2015-06-25T01:24:10+00:00

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 
Cc: Neil Brown 
Acked-by: Christoph Hellwig 
Signed-off-by: Dan Williams