Eric Lee / smarc-fsl-linux-kernel

30 Jun, 2017

1 commit

  • 14e494542   libnvdimm, btt: BTT updates for UEFI 2.7 format ... Browse Code »

    The UEFI 2.7 specification defines an updated BTT metadata format,
    bumping the revision to 2.0. Add support for the new format, while
    retaining compatibility for the old 1.1 format.

    Cc: Toshi Kani
    Cc: Linda Knippers
    Cc: Dan Williams
    Signed-off-by: Vishal Verma
    Signed-off-by: Dan Williams

    Vishal Verma
     

16 Jun, 2017

2 commits

  • b3fde74ea   libnvdimm, label: add address abstraction identifiers ... Browse Code »

    Starting with v1.2 labels, 'address abstractions' can be hinted via an
    address abstraction id that implies an info-block format. The standard
    address abstraction in the specification is the v2 format of the
    Block-Translation-Table (BTT). Support for that is saved for a later
    patch, for now we add support for the Linux supported address
    abstractions BTT (v1), PFN, and DAX.

    The new 'holder_class' attribute for namespace devices is added for
    tooling to specify the 'abstraction_guid' to store in the namespace label.
    For v1.1 labels this field is undefined and any setting of
    'holder_class' away from the default 'none' value will only have effect
    until the driver is unloaded. Setting 'holder_class' requires that
    whatever device tries to claim the namespace must be of the specified
    class.

    Cc: Vishal Verma
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 564e871aa   libnvdimm, label: add v1.2 nvdimm label definitions ... Browse Code »

    In support of improved interoperability between operating systems and pre-boot
    environments the Intel proposed NVDIMM Namespace Specification [1], has been
    adopted and modified to the the UEFI 2.7 NVDIMM Label Protocol [2].

    Update the definitions of the namespace label data structures so that the new
    format can be supported alongside the existing label format.

    The new specification changes the default label size to 256 bytes, so
    everywhere that relied on sizeof(struct nd_namespace_label) must now use the
    sizeof_namespace_label() helper.

    There should be no functional differences from these changes as the
    default is still the v1.1 128-byte format. Future patches will move the
    default to the v1.2 definition.

    [1]: http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf
    [2]: http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf

    Signed-off-by: Dan Williams

    Dan Williams
     

25 Jun, 2015

4 commits

  • 0ba1c6348   libnvdimm: write blk label set ... Browse Code »

    After 'uuid', 'size', 'sector_size', and optionally 'alt_name' have been
    set to valid values the labels on the dimm can be updated. The
    difference with the pmem case is that blk namespaces are limited to one
    dimm and can cover discontiguous ranges in dpa space.

    Also, after allocating label slots, it is useful for userspace to know
    how many slots are left. Export this information in sysfs.

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

    Dan Williams
     
  • f524bf271   libnvdimm: write pmem label set ... Browse Code »

    After 'uuid', 'size', and optionally 'alt_name' have been set to valid
    values the labels on the dimms can be updated.

    Write procedure is:
    1/ Allocate and write new labels in the "next" index
    2/ Free the old labels in the working copy
    3/ Write the bitmap and the label space on the dimm
    4/ Write the index to make the update valid

    Label ranges directly mirror the dpa resource values for the given
    label_id of the namespace.

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

    Dan Williams
     
  • bf9bccc14   libnvdimm: pmem label sets and namespace instantiation. ... Browse Code »

    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

    Dan Williams
     
  • 4a826c83d   libnvdimm: namespace indices: read and validate ... Browse Code »

    This on media label format [1] consists of two index blocks followed by
    an array of labels. None of these structures are ever updated in place.
    A sequence number tracks the current active index and the next one to
    write, while labels are written to free slots.

    +------------+
    | |
    | nsindex0 |
    | |
    +------------+
    | |
    | nsindex1 |
    | |
    +------------+
    | label0 |
    +------------+
    | label1 |
    +------------+
    | |
    ....nslot...
    | |
    +------------+
    | labelN |
    +------------+

    After reading valid labels, store the dpa ranges they claim into
    per-dimm resource trees.

    [1]: http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf

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

    Dan Williams