[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

            Bug ID: 89072
           Summary: Radeon Hawaii no acceleration on 32-bit kernel
           Product: DRI
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: terraluna977@gmail.com
        QA Contact: terraluna977@gmail.com
        Depends on: 88786

Created attachment 113333
  --> https://bugs.freedesktop.org/attachment.cgi?id=113333&action=edit
dmesg booted with drm.debug

On Radeon Hawaii board the GPU acceleration is disabled.
Since the new HSA driver is designed for 64-bit kernels only, the current
Radeon accelaration should be fixed for 32-bit systems.

[    0.883020] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.883020] [drm] Driver supports precise vblank timestamp query.
[    0.883036] radeon 0000:01:00.0: radeon: using MSI.
[    0.883053] [drm] radeon: irq initialized.
[    1.026624] [drm:cik_ring_test] *ERROR* radeon: ring 0 test failed
(scratch(0x3010C)=0xCAFEDEAD)
[    1.026678] radeon 0000:01:00.0: disabling GPU acceleration

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #1 from Woody Suwalski <terraluna977@gmail.com> ---
Created attachment 113334
  --> https://bugs.freedesktop.org/attachment.cgi?id=113334&action=edit
lspci -vvnn output

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
I think the problem is ttm uses an unsigned long to store the offsets which is
only 32 bits on 32 bit kernels, but the GPU's address space is 64 bit so it
gets cut off.

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 113971
  --> https://bugs.freedesktop.org/attachment.cgi?id=113971&action=edit
possible fix

Does this patch help?

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #4 from Woody Suwalski <terraluna977@gmail.com> ---
Created attachment 114065
  --> https://bugs.freedesktop.org/attachment.cgi?id=114065&action=edit
fix for nouveau_fbcon.c printk compilation warning

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #5 from Woody Suwalski <terraluna977@gmail.com> ---
Your idea seems to be correct:

[    0.922337] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.922383] [drm] Driver supports precise vblank timestamp query.
[    0.922444] radeon 0000:01:00.0: radeon: using MSI.
[    0.922505] [drm] radeon: irq initialized.
[    0.924622] [drm] ring test on 0 succeeded in 4 usecs
[    0.924743] [drm] ring test on 1 succeeded in 3 usecs
[    0.924799] [drm] ring test on 2 succeeded in 3 usecs
[    0.924945] [drm] ring test on 3 succeeded in 5 usecs
[    0.924997] [drm] ring test on 4 succeeded in 5 usecs
[    0.970689] [drm] ring test on 5 succeeded in 2 usecs
[    0.990579] [drm] UVD initialized successfully.
[    1.099778] [drm] ring test on 6 succeeded in 24 usecs
[    1.099831] [drm] ring test on 7 succeeded in 3 usecs
[    1.099876] [drm] VCE initialized successfully.
[    1.100006] [drm] ib test on ring 0 succeeded in 0 usecs
[    1.599633] [drm] ib test on ring 1 succeeded in 0 usecs
[    1.851505] tsc: Refined TSC clocksource calibration: 3092.973 MHz
[    2.099525] [drm] ib test on ring 2 succeeded in 0 usecs
[    2.099660] [drm] ib test on ring 3 succeeded in 0 usecs
[    2.099758] [drm] ib test on ring 4 succeeded in 0 usecs
[    2.619405] [drm] ib test on ring 5 succeeded
[    2.640200] [drm] ib test on ring 6 succeeded
[    2.640982] [drm] ib test on ring 7 succeeded

glxgears shows much better numbers now.

The side effect is a compilation warning for nouveau driver - patch attached.

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

--- Comment #6 from Woody Suwalski <terraluna977@gmail.com> ---
Also did a sanity test on Nvidia 50 and Radon 635, no new problems noticed.
Alex, if you think that glxgears test is a sufficient proof, we can close this
bug.

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[Bug 89072] Radeon Hawaii no acceleration on 32-bit kernel

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https://bugs.freedesktop.org/show_bug.cgi?id=89072

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Alex Deucher <alexdeucher@gmail.com> ---
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54c4cd68ed7abd9f245722bee39464d04ddb4cfd

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