[Bug 75419] New: [ILK] Unigine Tropics hangs the GPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75419

          Priority: medium
            Bug ID: 75419
          Assignee: idr at freedesktop.org
           Summary: [ILK] Unigine Tropics hangs the GPU
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: kenneth at whitecape.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 10.1
         Component: Drivers/DRI/i965
           Product: Mesa

Created attachment 94629
  --> https://bugs.freedesktop.org/attachment.cgi?id=94629&action=edit
Bisect log (for reproducibility)

Running Unigine Tropics hangs the GPU on Ironlake.  This occurs with 10.1 and
master, and is a regression: Mesa 10.0.3 works fine.

A bisect shows:

67ebcb4711d7c6d35df03298f065806613a62798 is the first bad commit
commit 67ebcb4711d7c6d35df03298f065806613a62798
Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Mon Jan 13 14:32:56 2014 -0800

    i965: Use the new drm_intel_bo offset64 field.

    libdrm 2.4.52 introduces a new 'uint64_t offset64' field, intended to
    replace the old 'unsigned long offset' field.  To preserve ABI, libdrm
    continues to store the presumed offset in both locations.

    On Broadwell, a 64-bit kernel may place BOs at "high" (> 4G) addresses.
    However, with a 32-bit userspace, the 'unsigned long offset' field will
    only be 32-bit, which is not large enough to hold this value.  We need
    to use a proper uint64_t (like the kernel does).

    Technically, a lot of this code doesn't affect Broadwell, so we could
    leave it using the old field.  But it makes sense to just switch to the
    new, properly typed field.

    Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
    Reviewed-by: Eric Anholt <eric at anholt.net>
    Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

Steps to reproduce:
$ cd tropics
$ export MESA_EXTENSION_OVERRIDE=GL_EXT_framebuffer_multisample
$ ./1024x768_windowed.sh

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