user/sven/linux.git/include/linux/nd.h, branch v4.12

libnvdimm: add an atomic vs process context flag to rw_bytes

2017-05-11T04:46:22Z

nsio_rw_bytes can clear media errors, but this cannot be done while we are in an atomic context due to locking within ACPI. From the BTT, ->rw_bytes may be called either from atomic or process context depending on whether the calls happen during initialization or during IO. During init, we want to ensure error clearing happens, and the flag marking process context allows nsio_rw_bytes to do that. When called during IO, we're in atomic context, and error clearing can be skipped. Cc: Dan Williams Signed-off-by: Vishal Verma Signed-off-by: Dan Williams

libnvdimm, namespace: sort namespaces by dpa at init

2016-10-07T16:20:53Z

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

2016-10-07T16:20:53Z

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

2016-07-13T02:25:38Z

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

2016-07-12T22:13:48Z

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

2016-04-22T19:26:23Z

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

2016-04-22T19:26:23Z

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

2016-03-05T20:24:06Z

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

2015-06-25T08:20:04Z

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

2015-06-25T01:24:10Z

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