From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9AC2325E469 for ; Wed, 25 Feb 2026 12:46:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772023576; cv=none; b=FS4FgYQWjgIsvgGzahxh84Pt0SUhIObHjxZD9Kdq5wlh/LdaO+QFl0RF4/PqgTILYaNU57FZEIqDDdvBOYxxzXbRl08u7u+ldly+OvyTdz+i/Bz9w6eEuRne2tWopVapkV+ddbc4x/fWmwZ6b/vWpGmBlBpVDOiJIQtEkPnFKZI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772023576; c=relaxed/simple; bh=r2BHwPxklaA9napIxVrhetL1qFpwn0p4elqAniLVfaw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=lfZCmHk5rdz6LhW2G68BTX6rEF22EQ9iJXFEOXsZkr3bAgho+WjjhWg0pAvg/meIptlBZoEpj7uRV0Oc23SUOuDoz6NT4ldTxZxLA9DX2VfpHcV1CSQ/ogskRWLGp1g13KtOkcmyaoD7YCjSfdVvPuhmTyY2nG68+hgDVqd+5dg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=acX2xWxz; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="acX2xWxz" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-480706554beso78832255e9.1 for ; Wed, 25 Feb 2026 04:46:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772023574; x=1772628374; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=RW5tR77UgvK8ARjklYqEELQ6BbsvTHEuy834pDeZrFA=; b=acX2xWxzjkNLmiaHUzQqE5LUmyxJ6p8k1eSt7uWo2Y3S4y/TrRUa0BMxchM/Doxmc2 smBLVA6afx9n9w+PlJE8yJa2Xmjzs04zbnXmETUI10hNkjd6pMU9icLRd7DWRo2mfTHI +YNCDZXPl/Wcbt0YIxdf6DOMrk3ofICA4e6t5Q+n3PTtna+J2V6YhN8PXm+YFgdHDwiY fK2pOXbwPEd6FFiaDIP9BZH0nY3h1QI3qou8kBrZ02BVLsZvRJCSOza2AA+4CKqr7Bhw XTVZkMRzxSbB/3WxlkyeXMyXao1keb8BklszwZg9WRi+Q2TbC4hO8YwrnPeyfBTtNBac Jo9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772023574; x=1772628374; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=RW5tR77UgvK8ARjklYqEELQ6BbsvTHEuy834pDeZrFA=; b=IBaf/4fQFtEm3XU7tinpz/8Q5xrIEnnIKbzt4/L6d6lYHS8ma+cBBkCmrARhI80tbO DqFLR+scRdGAAzlzVZrgKvI/uAHtPAJgZ1GT/RhzF61Po90fRiASrTMMbMCOk9eYiJ95 y554XqgVJgfNM0w9gvrraMd4zCn/iLBzI2M4rHkoWbZLvhIFB8AgCnzM2XJHjC0kOdnt HCxXPbW2pCQGUUs5O6seNfi93FMZbs9LSUzYnD+v6rvmY+1m/2mw9GV2indgesfgiuW3 Y3mW/1O2OUdYG1zl7cSmDTY55+lPt35BTaMCfvEJas4nkqZHioVmAjeTHM4kzqUUrm5b 4x0Q== X-Forwarded-Encrypted: i=1; AJvYcCVWfQWUCVOz7SrC8FZzU64pRtGm17nwbjP0hTLwwyzawnA3zOy3K/fPUn5aTbTKsysLimU4SBV7Qab5UvI=@vger.kernel.org X-Gm-Message-State: AOJu0YxpfAsfs9fddwATY4+400gE5X4sAvzU6iwzk6ms2Iz9U3LKfIGW ssa0AolfMkvKJDNR6gUcyc2YgKO3dIDbE3Gj5cLkcE3dkAtMhAxEoJhh X-Gm-Gg: ATEYQzyCm6JGdfhUNxQunStUD0bhGeLB0+zMOl1riGXTwYy2xlvM2tJ1M08A1E1BCqQ 1hlSED8Oq9VCQJWN/gDewAatUD5RXJY6U+7xj34gsuYfrFIMgdldUKPAxwht9jBt0A2jsSCdQ1R evkfhEA/iASMSQGR2dSFawUztuSAQ7wGWWKa4gl8zu1Yml/S8sD8X+IPUsCgHRsLAqGfr3BCRNR GHkeTH/yv3zihPGhrFwSvih5sOo0cQBa/vaHg+NrzY4PNCgMp5rqW6cgnSTHCqAbFG2vf6dMMCo 67wW7mxisXBg3Dypr+SmnErwu9KCctroo92Ou9Dn/8K3oryfmSr82hZBGgMvC8oddgGcp5VAwhp aSSG93uWat2HPNW6Af1MKLdvITjZTJF1u59NyOT3/ISWOd+yY64e7kmA6USKpcavw3wZl4r1Xss W/MYhwMYvp6hSbkAgQdaYVF3yckxjBIVZTbmd7gCZWzQAD4Be7iz2IuN75HANZgCAr7vLE X-Received: by 2002:a05:600c:1d12:b0:483:5310:dc67 with SMTP id 5b1f17b1804b1-483c219b626mr3888685e9.20.1772023573831; Wed, 25 Feb 2026 04:46:13 -0800 (PST) Received: from Arch-Spectre.dur.ac.uk ([129.234.0.168]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-483bfcb9b97sm18419995e9.7.2026.02.25.04.46.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Feb 2026 04:46:13 -0800 (PST) From: Yicong Hui To: christian.koenig@amd.com, michel.daenzer@mailbox.org Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, david.hunter.linux@gmail.com, Yicong Hui Subject: [RFC PATCH v3 0/3] Querying errors from drm_syncobj Date: Wed, 25 Feb 2026 12:46:06 +0000 Message-ID: <20260225124609.968505-1-yiconghui@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch series adds 2 new flags, DRM_SYNCOBJ_QUERY_FLAGS_ERROR and DRM_SYNCOBJ_WAIT_FLAGS_ABORT_ON_ERROR for 3 ioctl operations DRM_IOCTL_SYNCOBJ_QUERY, DRM_IOCTL_SYNCOBJ_WAIT and DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT to allow them to batch-request error codes from multiple syncobjs and abort early upon error of any of them. Based on discussions from Michel Dänzer and Christian König, and a starter task from the DRM todo documentation. See https://gitlab.gnome.org/GNOME/mutter/-/issues/4624 for discussions on userspace implementation. I have looked into adding sub test cases into syncobj_wait.c and syncobj_timeline.c, igt-tests for this and I think I understand the process for writing tests and submitting them, however, these ioctls only trigger in the case that there is an error, but I am not sure what is the best way to artifically trigger an error from userspace in order to test that these ioctl flags work. What's the recommended way to approach this? --- Changes: v3: * Fixed inline comments by converting to multi-line comments in accordance to kernel style guidelines. * No longer using a separate superfluous function to walk the fence chain, and instead queries the last signaled fence in in the chain for its error code * Fixed types for error and handles array. * Used dma_fence_get_status to query error instead of getting it directly. v2: https://lore.kernel.org/dri-devel/20260220022631.2205037-1-yiconghui@gmail.com/T/#m6ab4f94a19c769193895d7728383f84e452cbbfa * Went from adding a new ioctl to implementing flags for existing ones. v1: * https://lore.kernel.org/all/20260213120836.81283-1-yiconghui@gmail.com/T/#mfdbc7f97e91ca5731b51b69c8cf8173cb0b2fb3e Yicong Hui (3): drm/syncobj: Add flag DRM_SYNCOBJ_QUERY_FLAGS_ERROR to query errors drm/syncobj: Add DRM_SYNCOBJ_WAIT_FLAGS_ABORT_ON_ERROR ioctl flag drm/syncobj/doc: Remove starter task from todo list Documentation/gpu/todo.rst | 16 ------------ drivers/gpu/drm/drm_syncobj.c | 49 ++++++++++++++++++++++++++++++----- include/uapi/drm/drm.h | 11 ++++++++ 3 files changed, 54 insertions(+), 22 deletions(-) -- 2.53.0