linux-kernel - [PATCH v2 0/4] dma-buf: To check enable signaling before signaled

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Message-ID: <20220905163502.4032-1-Arvind.Yadav@amd.com>
Date:   Mon, 5 Sep 2022 22:04:58 +0530
From:   Arvind Yadav <Arvind.Yadav@....com>
To:     <Christian.Koenig@....com>, <andrey.grodzovsky@....com>,
        <shashank.sharma@....com>, <amaranath.somalapuram@....com>,
        <Arunpravin.PaneerSelvam@....com>, <sumit.semwal@...aro.org>,
        <gustavo@...ovan.org>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <linux-media@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linaro-mm-sig@...ts.linaro.org>, <linux-kernel@...r.kernel.org>
CC:     Arvind Yadav <Arvind.Yadav@....com>
Subject: [PATCH v2 0/4] dma-buf: To check enable signaling before signaled

TTM, GEM, DRM or the core DMA-buf framework are needs
to enable software signaling before the fence is signaled.
The core DMA-buf framework software can forget to call
enable_signaling before the fence is signaled. It means
framework code can forget to call dma_fence_enable_sw_signaling()
before calling dma_fence_is_signaled(). To avoid this scenario
on debug kernel, check the DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT bit
status before checking the MA_FENCE_FLAG_SIGNALED_BIT bit status
to confirm that software signaling is enabled.


Arvind Yadav (4):
  [PATCH v2 1/4] drm/sched: Enable signaling for finished fence
  [PATCH v2 2/4] dma-buf: enable signaling for the stub fence on debug
  [PATCH v2 3/4] dma-buf: enable signaling for selftest fence on debug
  [PATCH v2 4/4] dma-buf: Check status of enable-signaling bit on debug

 drivers/dma-buf/dma-fence.c            |  7 ++++
 drivers/dma-buf/st-dma-fence-chain.c   |  8 +++++
 drivers/dma-buf/st-dma-fence-unwrap.c  | 44 ++++++++++++++++++++++++++
 drivers/dma-buf/st-dma-fence.c         | 25 ++++++++++++++-
 drivers/dma-buf/st-dma-resv.c          | 20 ++++++++++++
 drivers/gpu/drm/scheduler/sched_main.c |  2 ++
 include/linux/dma-fence.h              |  5 +++
 7 files changed, 110 insertions(+), 1 deletion(-)

-- 
2.25.1