linux-kernel - Re: [Linaro-mm-sig] [PATCH 00/11] drm/msm: drm scheduler conversion and cleanups

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Message-ID: <bbc4f7fc-9d51-695e-2bb7-62558d7523e2@gmail.com>
Date:   Tue, 20 Jul 2021 16:16:56 +0200
From:   Christian König <ckoenig.leichtzumerken@...il.com>
To:     Rob Clark <robdclark@...il.com>, dri-devel@...ts.freedesktop.org,
        Rob Clark <robdclark@...omium.org>,
        freedreno@...ts.freedesktop.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        open list <linux-kernel@...r.kernel.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Emma Anholt <emma@...olt.net>, Bernard Zhao <bernard@...o.com>,
        Sharat Masetty <smasetty@...eaurora.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>,
        Zhenzhong Duan <zhenzhong.duan@...il.com>,
        "Kristian H. Kristensen" <hoegsberg@...gle.com>,
        "open list:DRM DRIVER FOR MSM ADRENO GPU" 
        <linux-arm-msm@...r.kernel.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Lee Jones <lee.jones@...aro.org>,
        Dave Airlie <airlied@...hat.com>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>
Subject: Re: [Linaro-mm-sig] [PATCH 00/11] drm/msm: drm scheduler conversion
 and cleanups

Am 20.07.21 um 16:07 schrieb Daniel Vetter:
> On Mon, Jul 19, 2021 at 10:40:57AM +0200, Christian König wrote:
>> Am 17.07.21 um 22:29 schrieb Rob Clark:
>>> From: Rob Clark <robdclark@...omium.org>
>>>
>>> Conversion to gpu_scheduler, and bonus removal of
>>> drm_gem_object_put_locked()
>> Oh yes please!
>>
>> If I'm not completely mistaken that was the last puzzle piece missing to
>> unify TTMs and GEMs refcount of objects.
> Why does drm/msm, a driver not using ttm at all, block ttm refactorings?
> We can just check whether the TTM using driver is potentially using locked
> final unref and have a special version of
> drm_gem_object_put_guaranteed_unlocked or whatever the bikeshed will look
> like, which doesn't have the migth_lock.

Because we now don't have any unrealistic lock inversion between 
dev->struct_mutex and obj->resv lockdep can complain any more.

Cheers,
Christian.

>
> Anyway, deed is done now :-)
> -Daniel
>
>> Only problem is that I only see patch 7 and 9 in my inbox. Where is the
>> rest?
>>
>> Thanks,
>> Christian.
>>
>>> Rob Clark (11):
>>>     drm/msm: Docs and misc cleanup
>>>     drm/msm: Small submitqueue creation cleanup
>>>     drm/msm: drop drm_gem_object_put_locked()
>>>     drm: Drop drm_gem_object_put_locked()
>>>     drm/msm/submit: Simplify out-fence-fd handling
>>>     drm/msm: Consolidate submit bo state
>>>     drm/msm: Track "seqno" fences by idr
>>>     drm/msm: Return ERR_PTR() from submit_create()
>>>     drm/msm: Conversion to drm scheduler
>>>     drm/msm: Drop struct_mutex in submit path
>>>     drm/msm: Utilize gpu scheduler priorities
>>>
>>>    drivers/gpu/drm/drm_gem.c                   |  22 --
>>>    drivers/gpu/drm/msm/Kconfig                 |   1 +
>>>    drivers/gpu/drm/msm/adreno/a5xx_debugfs.c   |   4 +-
>>>    drivers/gpu/drm/msm/adreno/a5xx_gpu.c       |   6 +-
>>>    drivers/gpu/drm/msm/adreno/a5xx_power.c     |   2 +-
>>>    drivers/gpu/drm/msm/adreno/a5xx_preempt.c   |   7 +-
>>>    drivers/gpu/drm/msm/adreno/a6xx_gmu.c       |  12 +-
>>>    drivers/gpu/drm/msm/adreno/a6xx_gpu.c       |   2 +-
>>>    drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c |   4 +-
>>>    drivers/gpu/drm/msm/adreno/adreno_gpu.c     |   6 +-
>>>    drivers/gpu/drm/msm/msm_drv.c               |  30 +-
>>>    drivers/gpu/drm/msm/msm_fence.c             |  39 ---
>>>    drivers/gpu/drm/msm/msm_fence.h             |   2 -
>>>    drivers/gpu/drm/msm/msm_gem.c               |  91 +-----
>>>    drivers/gpu/drm/msm/msm_gem.h               |  37 ++-
>>>    drivers/gpu/drm/msm/msm_gem_submit.c        | 300 ++++++++++++--------
>>>    drivers/gpu/drm/msm/msm_gpu.c               |  50 +---
>>>    drivers/gpu/drm/msm/msm_gpu.h               |  41 ++-
>>>    drivers/gpu/drm/msm/msm_ringbuffer.c        |  70 ++++-
>>>    drivers/gpu/drm/msm/msm_ringbuffer.h        |  12 +
>>>    drivers/gpu/drm/msm/msm_submitqueue.c       |  49 +++-
>>>    include/drm/drm_gem.h                       |   2 -
>>>    include/uapi/drm/msm_drm.h                  |  10 +-
>>>    23 files changed, 440 insertions(+), 359 deletions(-)
>>>