Eric Lee / smarc-fsl-linux-kernel

10 Feb, 2017

1 commit

  • baa6d3966   fpga: Add scatterlist based programming ... Browse Code »

    Requiring contiguous kernel memory is not a good idea, this is a limited
    resource and allocation can fail under normal work loads.

    This introduces a .write_sg op that supporting drivers can provide
    to DMA directly from dis-contiguous memory and a new entry point
    fpga_mgr_buf_load_sg that users can call to directly provide page
    lists.

    The full matrix of compatibility is provided, either the linear or sg
    interface can be used by the user with a driver supporting either
    interface.

    A notable change for drivers is that the .write op can now be called
    multiple times.

    Signed-off-by: Jason Gunthorpe
    Acked-by: Alan Tull
    Acked-by: Moritz Fischer
    Signed-off-by: Greg Kroah-Hartman

    Jason Gunthorpe
     

30 Nov, 2016

1 commit

  • 1d7f1589d   fpga: Clarify how write_init works streaming modes ... Browse Code »

    This interface was designed for streaming, but write_init's buf
    argument has an unclear purpose. Define it to be the first bytes
    of the bitstream. Each driver gets to set how many bytes (at most)
    it wants to see. Short bitstreams will be passed through as-is, while
    long ones will be truncated.

    The intent is to allow drivers to peek at the header before the transfer
    actually starts.

    Signed-off-by: Jason Gunthorpe
    Acked-by: Alan Tull

    Jason Gunthorpe
     

11 Nov, 2016

2 commits

  • 40e83578f   doc: fpga-mgr: add fpga image info to api ... Browse Code »

    This patch adds a minor change in the FPGA Manager API
    to hold information that is specific to an FPGA image
    file. This change is expected to bring little, if any,
    pain.

    An FPGA image file will have particulars that affect how the
    image is programmed to the FPGA. One example is that
    current 'flags' currently has one bit which shows whether the
    FPGA image was built for full reconfiguration or partial
    reconfiguration. Another example is timeout values for
    enabling or disabling the bridges in the FPGA. As the
    complexity of the FPGA design increases, the bridges in the
    FPGA may take longer times to enable or disable.

    This patch documents the change in the FPGA Manager API
    functions, replacing the 'u32 flag' parameter with a pointer
    to struct fpga_image_info.

    Signed-off-by: Alan Tull
    Acked-by: Moritz Fischer
    Signed-off-by: Greg Kroah-Hartman

    Alan Tull
     
  • 9dce0287a   fpga: add method to get fpga manager from device ... Browse Code »

    The intent is to provide a non-DT method of getting
    ahold of a FPGA manager to do some FPGA programming.

    This patch refactors of_fpga_mgr_get() to reuse most of it
    while adding a new method fpga_mgr_get() for getting a
    pointer to a fpga manager struct, given the device.

    Signed-off-by: Alan Tull
    Signed-off-by: Greg Kroah-Hartman

    Alan Tull
     

08 Oct, 2015

1 commit