Eric Lee / linux-smarc-t335x-v3.2

09 Sep, 2009

1 commit

  • 09c8a5b85   ioat: switch watchdog and reset handler from workqueue to timer ... Browse Code »

    In order to support dynamic resizing of the descriptor ring or polling
    for a descriptor in the presence of a hung channel the reset handler
    needs to make progress while in a non-preemptible context. The current
    workqueue implementation precludes polling channel reset completion
    under spin_lock().

    This conversion also allows us to return to opportunistic cleanup in the
    ioat2 case as the timer implementation guarantees at least one cleanup
    after every descriptor is submitted. This means the worst case
    completion latency becomes the timer frequency (for exceptional
    circumstances), but with the benefit of avoiding busy waiting when the
    lock is contended.

    Signed-off-by: Maciej Sosnowski
    Signed-off-by: Dan Williams

    Dan Williams
     

29 Jul, 2009

1 commit

  • 584ec2275   ioat: move to drivers/dma/ioat/ ... Browse Code »

    When first created the ioat driver was the only inhabitant of
    drivers/dma/. Now, it is the only multi-file (more than a .c and a .h)
    driver in the directory. Moving it to an ioat/ subdirectory allows the
    naming convention to be cleaned up, and allows for future splitting of
    the source files by hardware version (v1, v2, and v3).

    Signed-off-by: Maciej Sosnowski
    Signed-off-by: Dan Williams

    Dan Williams
     

29 May, 2009

1 commit

  • 2f102607a   i7300_idle: allow testing on i5000-series hardware w/o re-compile ... Browse Code »

    Testing the i7300_idle driver on i5000-series hardware required
    an edit to i7300_idle.h to "#define SUPPORT_I5000 1" and a re-build
    of both i7300_idle and ioat_dma.

    Replace that build-time scheme with a load-time module parameter:
    "7300_idle.forceload=1" to make it easier to test the driver
    on hardware that while not officially validated, works fine
    and is much more commonly available.

    By default (no modparam) the driver will continue to load
    only on the i7300.

    Note that ioat_dma runs a copy of i7300_idle's probe routine
    to know to reserve an IOAT channel for i7300_idle.
    This change makes ioat_dma do that always on the i5000,
    just like it does on the i7300.

    Signed-off-by: Len Brown
    Acked-by: Andrew Henroid

    Len Brown
     

07 Apr, 2009

1 commit

07 Jan, 2009

1 commit

28 Oct, 2008

1 commit

25 Oct, 2008

2 commits

22 Oct, 2008

1 commit

  • 27471fdb3   i7300_idle driver v1.55 ... Browse Code »

    The Intel 7300 Memory Controller supports dynamic throttling of memory which can
    be used to save power when system is idle. This driver does the memory
    throttling when all CPUs are idle on such a system.

    Refer to "Intel 7300 Memory Controller Hub (MCH)" datasheet
    for the config space description.

    Signed-off-by: Andy Henroid
    Signed-off-by: Len Brown
    Signed-off-by: Venkatesh Pallipadi

    Andy Henroid