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Date: Wed, 11 Feb 2026 16:16:20 +0100
Message-Id: <DGC8CUUJCDKJ.5XVHXB6I6V5F@kernel.org>
To: "Boris Brezillon" <boris.brezillon@collabora.com>
From: "Danilo Krummrich" <dakr@kernel.org>
Subject: Re: [RFC PATCH 2/4] rust: sync: Add dma_fence abstractions
Cc: "Alice Ryhl" <aliceryhl@google.com>, =?utf-8?q?Christian_K=C3=B6nig?=
 <christian.koenig@amd.com>, "Philipp Stanner" <phasta@mailbox.org>,
 <phasta@kernel.org>, "David Airlie" <airlied@gmail.com>, "Simona Vetter"
 <simona@ffwll.ch>, "Gary Guo" <gary@garyguo.net>, "Benno Lossin"
 <lossin@kernel.org>, "Daniel Almeida" <daniel.almeida@collabora.com>, "Joel
 Fernandes" <joelagnelf@nvidia.com>, <linux-kernel@vger.kernel.org>,
 <dri-devel@lists.freedesktop.org>, <rust-for-linux@vger.kernel.org>,
 <lucas.demarchi@intel.com>, <thomas.hellstrom@linux.intel.com>,
 <rodrigo.vivi@intel.com>
References: <20260205095727.4c3e2941@fedora>
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 <c319c349-eb95-4c38-84fb-47440daefc3b@amd.com>
 <aYruaIxn8sMXVI0r@google.com> <20260210101525.7fb85f25@fedora>
 <aYsFKOVrsMQeAHoi@google.com> <DGB7RWKMPJQZ.2PHB127O6MVVN@kernel.org>
 <4e84306c-5cec-4048-a7eb-a364788baa89@amd.com>
 <aYsZHhX2IVO2kOSm@google.com> <DGC1KP1DT6YV.3LQWZXMA22L5A@kernel.org>
 <20260211112049.089b2656@fedora> <DGC2WYUT80B4.3D4QKYP8FVVQJ@kernel.org>
 <20260211121223.78674f22@fedora> <DGC7JWOL70HH.2AMUEI3M10I9J@kernel.org>
 <20260211160059.6e0d3b60@fedora> <DGC84SJI67NG.5QGAR13XBM75@kernel.org>
 <20260211161444.3d170ea1@fedora>
In-Reply-To: <20260211161444.3d170ea1@fedora>

On Wed Feb 11, 2026 at 4:14 PM CET, Boris Brezillon wrote:
> Okay, that would be one DmaFenceWorkqueue only used for the driver
> JobQueue instances (or one per-instance if the driver wants that)
> wrapped into some object that doesn't expose it as a generic workqueue,
> so only JobQueue instances can use it. And then drivers are free to
> instantiate their own DmaFenceWorkqueue for anything else that's
> still in the DMA-signalling path, but not directly related to
> JobQueues. I think I'd be fine with that.

Yes, that sounds good to me.