[Bug 111619] [Bisected]. Gallium-nine. Apitrace from the "Just cause" game leads to gpu hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111619

            Bug ID: 111619
           Summary: [Bisected]. Gallium-nine. Apitrace from the "Just
                    cause" game leads to gpu hang
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Drivers/Gallium/Iris
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: denys.kostin at globallogic.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

During checking apitrace for the game Just Cause (using gallium-nine) I faced
with gpu hang.

Configuration:
Manjaro OS
mesa-git master
gallium-nine => Native Direct3D 9 v0.4.0.294-release is active.
KBL cpu (HD630)


Actually trace on latest mesa master has a good rendering picture and gpu hang
(on lower mesa versions picture can be corrupted). Keep in mind, that you may
need release mesa version, because on debug you may got this assertion:
>../src/gallium/drivers/iris/iris_state.c:2536: iris_set_constant_buffer: Assertion `index > 0' failed.

Hang is stable on 351516 call.

Bisected to:

3b6d787e404181758227e205eda03600b25c1fd9 is the first bad commit
commit 3b6d787e404181758227e205eda03600b25c1fd9
Author: Timur Kristóf <timur.kristof at gmail.com>
Date: Fri Jun 14 14:03:28 2019 +0200

iris: move sysvals to their own constant buffer

This commit moves the sysvals to a separate, new constant buffer
at the end (before the shader constants). It also allows us to
remove the special handling we had for cbuf0, and enables all
constant buffers to support user-specified resources and user
buffers.

v2: (by Kenneth Graunke)

    Rebase on the previous patch to fix system value uploading.
    Fix disk cache num_cbufs calculation
    Fix passthrough TCS to report num_cbufs = 1 so upload actually occurs
    Change upload_sysvals to assert that num_cbufs > 0 when
    num_system_values > 0.

Signed-off-by: Timur Kristóf <timur.kristof at gmail.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

src/gallium/drivers/iris/iris_context.h | 3 +-
src/gallium/drivers/iris/iris_disk_cache.c | 6 ++-
src/gallium/drivers/iris/iris_draw.c | 2 +-
src/gallium/drivers/iris/iris_program.c | 60 ++++++++--------------
src/gallium/drivers/iris/iris_state.c | 80 ++++++++++++++++--------------
5 files changed, 73 insertions, 78 deletions

Link to apitrace =>
https://drive.google.com/open?id=1MCYg7ncKg30VX_TPnGEIRp6W3HdRMs3C

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