Eric Lee / smarc-fsl-linux-kernel

10 Oct, 2016

1 commit

22 Sep, 2016

1 commit

19 Sep, 2016

1 commit

15 Sep, 2016

1 commit

24 Jan, 2016

1 commit

  • 048ccca8c   Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma ... Browse Code »

    Pull rdma updates from Doug Ledford:
    "Initial roundup of 4.5 merge window patches

    - Remove usage of ib_query_device and instead store attributes in
    ib_device struct

    - Move iopoll out of block and into lib, rename to irqpoll, and use
    in several places in the rdma stack as our new completion queue
    polling library mechanism. Update the other block drivers that
    already used iopoll to use the new mechanism too.

    - Replace the per-entry GID table locks with a single GID table lock

    - IPoIB multicast cleanup

    - Cleanups to the IB MR facility

    - Add support for 64bit extended IB counters

    - Fix for netlink oops while parsing RDMA nl messages

    - RoCEv2 support for the core IB code

    - mlx4 RoCEv2 support

    - mlx5 RoCEv2 support

    - Cross Channel support for mlx5

    - Timestamp support for mlx5

    - Atomic support for mlx5

    - Raw QP support for mlx5

    - MAINTAINERS update for mlx4/mlx5

    - Misc ocrdma, qib, nes, usNIC, cxgb3, cxgb4, mlx4, mlx5 updates

    - Add support for remote invalidate to the iSER driver (pushed
    through the RDMA tree due to dependencies, acknowledged by nab)

    - Update to NFSoRDMA (pushed through the RDMA tree due to
    dependencies, acknowledged by Bruce)"

    * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (169 commits)
    IB/mlx5: Unify CQ create flags check
    IB/mlx5: Expose Raw Packet QP to user space consumers
    {IB, net}/mlx5: Move the modify QP operation table to mlx5_ib
    IB/mlx5: Support setting Ethernet priority for Raw Packet QPs
    IB/mlx5: Add Raw Packet QP query functionality
    IB/mlx5: Add create and destroy functionality for Raw Packet QP
    IB/mlx5: Refactor mlx5_ib_qp to accommodate other QP types
    IB/mlx5: Allocate a Transport Domain for each ucontext
    net/mlx5_core: Warn on unsupported events of QP/RQ/SQ
    net/mlx5_core: Add RQ and SQ event handling
    net/mlx5_core: Export transport objects
    IB/mlx5: Expose CQE version to user-space
    IB/mlx5: Add CQE version 1 support to user QPs and SRQs
    IB/mlx5: Fix data validation in mlx5_ib_alloc_ucontext
    IB/sa: Fix netlink local service GFP crash
    IB/srpt: Remove redundant wc array
    IB/qib: Improve ipoib UD performance
    IB/mlx4: Advertise RoCE v2 support
    IB/mlx4: Create and use another QP1 for RoCEv2
    IB/mlx4: Enable send of RoCE QP1 packets with IP/UDP headers
    ...

    Linus Torvalds
     

09 Jan, 2016

1 commit

  • 9e0e252a0   badblocks: Add core badblock management code ... Browse Code »

    Take the core badblocks implementation from md, and make it generally
    available. This follows the same style as kernel implementations of
    linked lists, rb-trees etc, where you can have a structure that can be
    embedded anywhere, and accessor functions to manipulate the data.

    The only changes in this copy of the code are ones to generalize
    function/variable names from md-specific ones. Also add init and free
    functions.

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

    Vishal Verma
     

12 Dec, 2015

1 commit

27 Sep, 2014

1 commit

  • 2341c2f8c   block: Add T10 Protection Information functions ... Browse Code »

    The T10 Protection Information format is also used by some devices that
    do not go through the SCSI layer (virtual block devices, NVMe). Relocate
    the relevant functions to a block layer library that can be used without
    involving SCSI.

    Signed-off-by: Martin K. Petersen
    Reviewed-by: Christoph Hellwig
    Signed-off-by: Jens Axboe

    Martin K. Petersen
     

20 May, 2014

2 commits

19 May, 2014

1 commit

25 Oct, 2013

1 commit

  • 320ae51fe   blk-mq: new multi-queue block IO queueing mechanism ... Browse Code »

    Linux currently has two models for block devices:

    - The classic request_fn based approach, where drivers use struct
    request units for IO. The block layer provides various helper
    functionalities to let drivers share code, things like tag
    management, timeout handling, queueing, etc.

    - The "stacked" approach, where a driver squeezes in between the
    block layer and IO submitter. Since this bypasses the IO stack,
    driver generally have to manage everything themselves.

    With drivers being written for new high IOPS devices, the classic
    request_fn based driver doesn't work well enough. The design dates
    back to when both SMP and high IOPS was rare. It has problems with
    scaling to bigger machines, and runs into scaling issues even on
    smaller machines when you have IOPS in the hundreds of thousands
    per device.

    The stacked approach is then most often selected as the model
    for the driver. But this means that everybody has to re-invent
    everything, and along with that we get all the problems again
    that the shared approach solved.

    This commit introduces blk-mq, block multi queue support. The
    design is centered around per-cpu queues for queueing IO, which
    then funnel down into x number of hardware submission queues.
    We might have a 1:1 mapping between the two, or it might be
    an N:M mapping. That all depends on what the hardware supports.

    blk-mq provides various helper functions, which include:

    - Scalable support for request tagging. Most devices need to
    be able to uniquely identify a request both in the driver and
    to the hardware. The tagging uses per-cpu caches for freed
    tags, to enable cache hot reuse.

    - Timeout handling without tracking request on a per-device
    basis. Basically the driver should be able to get a notification,
    if a request happens to fail.

    - Optional support for non 1:1 mappings between issue and
    submission queues. blk-mq can redirect IO completions to the
    desired location.

    - Support for per-request payloads. Drivers almost always need
    to associate a request structure with some driver private
    command structure. Drivers can tell blk-mq this at init time,
    and then any request handed to the driver will have the
    required size of memory associated with it.

    - Support for merging of IO, and plugging. The stacked model
    gets neither of these. Even for high IOPS devices, merging
    sequential IO reduces per-command overhead and thus
    increases bandwidth.

    For now, this is provided as a potential 3rd queueing model, with
    the hope being that, as it matures, it can replace both the classic
    and stacked model. That would get us back to having just 1 real
    model for block devices, leaving the stacked approach to dm/md
    devices (as it was originally intended).

    Contributions in this patch from the following people:

    Shaohua Li
    Alexander Gordeev
    Christoph Hellwig
    Mike Christie
    Matias Bjorling
    Jeff Moyer

    Acked-by: Christoph Hellwig
    Signed-off-by: Jens Axboe

    Jens Axboe
     

01 Oct, 2013

1 commit

  • 080506ad0   block: change config option name for cmdline partition parsing ... Browse Code »

    Recently commit bab55417b10c ("block: support embedded device command
    line partition") introduced CONFIG_CMDLINE_PARSER. However, that name
    is too generic and sounds like it enables/disables generic kernel boot
    arg processing, when it really is block specific.

    Before this option becomes a part of a full/final release, add the BLK_
    prefix to it so that it is clear in absence of any other context that it
    is block specific.

    In addition, fix up the following less critical items:
    - help text was not really at all helpful.
    - index file for Documentation was not updated
    - add the new arg to Documentation/kernel-parameters.txt
    - clarify wording in source comments

    Signed-off-by: Paul Gortmaker
    Cc: Jens Axboe
    Cc: Cai Zhiyong
    Cc: Wei Yongjun
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Paul Gortmaker
     

12 Sep, 2013

1 commit

  • bab55417b   block: support embedded device command line partition ... Browse Code »

    Read block device partition table from command line. The partition used
    for fixed block device (eMMC) embedded device. It is no MBR, save
    storage space. Bootloader can be easily accessed by absolute address of
    data on the block device. Users can easily change the partition.

    This code reference MTD partition, source "drivers/mtd/cmdlinepart.c"
    About the partition verbose reference
    "Documentation/block/cmdline-partition.txt"

    [akpm@linux-foundation.org: fix printk text]
    [yongjun_wei@trendmicro.com.cn: fix error return code in parse_parts()]
    Signed-off-by: Cai Zhiyong
    Cc: Karel Zak
    Cc: "Wanglin (Albert)"
    Cc: Marius Groeger
    Cc: David Woodhouse
    Cc: Jens Axboe
    Cc: Brian Norris
    Cc: Artem Bityutskiy
    Signed-off-by: Wei Yongjun
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Cai Zhiyong
     

04 Jan, 2012

2 commits

01 Aug, 2011

1 commit

  • aa387cc89   block: add bsg helper library ... Browse Code »

    This moves the FC classes bsg code to the block layer and
    makes it a lib so that other classes like iscsi and SAS can use it.

    It is helpful because working with the request queue, bios,
    creating scatterlists, etc are a pain that the LLD does not
    have to worry about with normal IOs and should not have to
    worry about for bsg requests.

    Signed-off-by: Mike Christie
    Signed-off-by: Jens Axboe

    Mike Christie
     

23 Oct, 2010

1 commit

  • a2887097f   Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block ... Browse Code »

    * 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block: (46 commits)
    xen-blkfront: disable barrier/flush write support
    Added blk-lib.c and blk-barrier.c was renamed to blk-flush.c
    block: remove BLKDEV_IFL_WAIT
    aic7xxx_old: removed unused 'req' variable
    block: remove the BH_Eopnotsupp flag
    block: remove the BLKDEV_IFL_BARRIER flag
    block: remove the WRITE_BARRIER flag
    swap: do not send discards as barriers
    fat: do not send discards as barriers
    ext4: do not send discards as barriers
    jbd2: replace barriers with explicit flush / FUA usage
    jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier
    jbd: replace barriers with explicit flush / FUA usage
    nilfs2: replace barriers with explicit flush / FUA usage
    reiserfs: replace barriers with explicit flush / FUA usage
    gfs2: replace barriers with explicit flush / FUA usage
    btrfs: replace barriers with explicit flush / FUA usage
    xfs: replace barriers with explicit flush / FUA usage
    block: pass gfp_mask and flags to sb_issue_discard
    dm: convey that all flushes are processed as empty
    ...

    Linus Torvalds
     

16 Sep, 2010

1 commit

10 Sep, 2010

1 commit

29 Apr, 2010

1 commit

04 Dec, 2009

1 commit

03 Oct, 2009

1 commit

  • 492af6350   block: remove the anticipatory IO scheduler ... Browse Code »

    AS is mostly a subset of CFQ, so there's little point in still
    providing this separate IO scheduler. Hopefully at some point we
    can get down to one single IO scheduler again, at least this brings
    us closer by having only one intelligent IO scheduler.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

11 Sep, 2009

1 commit

  • 5e605b64a   block: add blk-iopoll, a NAPI like approach for block devices ... Browse Code »

    This borrows some code from NAPI and implements a polled completion
    mode for block devices. The idea is the same as NAPI - instead of
    doing the command completion when the irq occurs, schedule a dedicated
    softirq in the hopes that we will complete more IO when the iopoll
    handler is invoked. Devices have a budget of commands assigned, and will
    stay in polled mode as long as they continue to consume their budget
    from the iopoll softirq handler. If they do not, the device is set back
    to interrupt completion mode.

    This patch holds the core bits for blk-iopoll, device driver support
    sold separately.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

01 Jul, 2009

1 commit

  • 018e04468   block: get rid of queue-private command filter ... Browse Code »

    The initial patches to support this through sysfs export were broken
    and have been if 0'ed out in any release. So lets just kill the code
    and reclaim some space in struct request_queue, if anyone would later
    like to fixup the sysfs bits, the git history can easily restore
    the removed bits.

    Signed-off-by: Jens Axboe

    Jens Axboe
     

09 Feb, 2009

1 commit

09 Oct, 2008

2 commits

03 Jul, 2008

2 commits

  • 0b07de85a   allow userspace to modify scsi command filter on per device basis ... Browse Code »

    This patch exports the per-gendisk command filter to user space through
    sysfs, so it can be changed by the system administrator.
    All users of the old cmd filter have been converted to use the new one.

    Original patch from Peter Jones.

    Signed-off-by: Adel Gadllah
    Signed-off-by: Peter Jones
    Signed-off-by: Jens Axboe

    Adel Gadllah
     
  • 7ba1ba12e   block: Block layer data integrity support ... Browse Code »

    Some block devices support verifying the integrity of requests by way
    of checksums or other protection information that is submitted along
    with the I/O.

    This patch implements support for generating and verifying integrity
    metadata, as well as correctly merging, splitting and cloning bios and
    requests that have this extra information attached.

    See Documentation/block/data-integrity.txt for more information.

    Signed-off-by: Martin K. Petersen
    Signed-off-by: Jens Axboe

    Martin K. Petersen
     

30 Jan, 2008

4 commits

12 Oct, 2007

1 commit

10 Oct, 2007

1 commit

16 Jul, 2007

1 commit

01 Oct, 2006

1 commit

  • 9361401eb   [PATCH] BLOCK: Make it possible to disable the block layer [try #6] ... Browse Code »

    Make it possible to disable the block layer. Not all embedded devices require
    it, some can make do with just JFFS2, NFS, ramfs, etc - none of which require
    the block layer to be present.

    This patch does the following:

    (*) Introduces CONFIG_BLOCK to disable the block layer, buffering and blockdev
    support.

    (*) Adds dependencies on CONFIG_BLOCK to any configuration item that controls
    an item that uses the block layer. This includes:

    (*) Block I/O tracing.

    (*) Disk partition code.

    (*) All filesystems that are block based, eg: Ext3, ReiserFS, ISOFS.

    (*) The SCSI layer. As far as I can tell, even SCSI chardevs use the
    block layer to do scheduling. Some drivers that use SCSI facilities -
    such as USB storage - end up disabled indirectly from this.

    (*) Various block-based device drivers, such as IDE and the old CDROM
    drivers.

    (*) MTD blockdev handling and FTL.

    (*) JFFS - which uses set_bdev_super(), something it could avoid doing by
    taking a leaf out of JFFS2's book.

    (*) Makes most of the contents of linux/blkdev.h, linux/buffer_head.h and
    linux/elevator.h contingent on CONFIG_BLOCK being set. sector_div() is,
    however, still used in places, and so is still available.

    (*) Also made contingent are the contents of linux/mpage.h, linux/genhd.h and
    parts of linux/fs.h.

    (*) Makes a number of files in fs/ contingent on CONFIG_BLOCK.

    (*) Makes mm/bounce.c (bounce buffering) contingent on CONFIG_BLOCK.

    (*) set_page_dirty() doesn't call __set_page_dirty_buffers() if CONFIG_BLOCK
    is not enabled.

    (*) fs/no-block.c is created to hold out-of-line stubs and things that are
    required when CONFIG_BLOCK is not set:

    (*) Default blockdev file operations (to give error ENODEV on opening).

    (*) Makes some /proc changes:

    (*) /proc/devices does not list any blockdevs.

    (*) /proc/diskstats and /proc/partitions are contingent on CONFIG_BLOCK.

    (*) Makes some compat ioctl handling contingent on CONFIG_BLOCK.

    (*) If CONFIG_BLOCK is not defined, makes sys_quotactl() return -ENODEV if
    given command other than Q_SYNC or if a special device is specified.

    (*) In init/do_mounts.c, no reference is made to the blockdev routines if
    CONFIG_BLOCK is not defined. This does not prohibit NFS roots or JFFS2.

    (*) The bdflush, ioprio_set and ioprio_get syscalls can now be absent (return
    error ENOSYS by way of cond_syscall if so).

    (*) The seclvl_bd_claim() and seclvl_bd_release() security calls do nothing if
    CONFIG_BLOCK is not set, since they can't then happen.

    Signed-Off-By: David Howells
    Signed-off-by: Jens Axboe

    David Howells
     

24 Mar, 2006

1 commit

04 Nov, 2005

1 commit