linux-kernel - [PATCH 0/2] drm/msm: Get rid of fence allocation in job

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Date:   Sat, 11 Mar 2023 09:35:10 -0800
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        Rob Clark <robdclark@...omium.org>,
        Gustavo Padovan <gustavo@...ovan.org>,
        linaro-mm-sig@...ts.linaro.org (moderated list:DMA BUFFER SHARING
        FRAMEWORK), linux-kernel@...r.kernel.org (open list),
        linux-media@...r.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK),
        Sean Paul <sean@...rly.run>
Subject: [PATCH 0/2] drm/msm: Get rid of fence allocation in job_run()

From: Rob Clark <robdclark@...omium.org>

Inspired by https://lore.kernel.org/dri-devel/20200604081224.863494-10-daniel.vetter@ffwll.ch/
it seemed like a good idea to get rid of memory allocation in job_run()
by embedding the hw dma_fence in the job/submit struct.

Applies on top of https://patchwork.freedesktop.org/series/93035/ but I
can re-work it to swap the order.  I think the first patch would be
useful to amdgpu and perhaps anyone else embedding the hw_fence in the
struct containing drm_sched_job.

Rob Clark (2):
  dma-buf/dma-fence: Add dma_fence_init_noref()
  drm/msm: Embed the hw_fence in msm_gem_submit

 drivers/dma-buf/dma-fence.c          | 43 +++++++++++++++++++-------
 drivers/gpu/drm/msm/msm_fence.c      | 45 +++++++++++-----------------
 drivers/gpu/drm/msm/msm_fence.h      |  2 +-
 drivers/gpu/drm/msm/msm_gem.h        | 10 +++----
 drivers/gpu/drm/msm/msm_gem_submit.c |  8 ++---
 drivers/gpu/drm/msm/msm_gpu.c        |  4 +--
 drivers/gpu/drm/msm/msm_ringbuffer.c |  4 +--
 include/linux/dma-fence.h            |  2 ++
 8 files changed, 66 insertions(+), 52 deletions(-)

-- 
2.39.2