From: "Alexandre Courbot" <acourbot@nvidia.com>
To: "Eliot Courtney" <ecourtney@nvidia.com>
Cc: "Danilo Krummrich" <dakr@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Boqun Feng" <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Trevor Gross" <tmgross@umich.edu>, "Zhi Wang" <zhiw@nvidia.com>,
"John Hubbard" <jhubbard@nvidia.com>,
"Alistair Popple" <apopple@nvidia.com>,
"Joel Fernandes" <joelagnelf@nvidia.com>,
"Timur Tabi" <ttabi@nvidia.com>,
nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org
Subject: Re: [PATCH v6 0/9] gpu: nova-core: gsp: add continuation record support
Date: Tue, 10 Mar 2026 16:44:46 +0900 [thread overview]
Message-ID: <DGYXNT6J445H.3C3A7F3BJIACJ@nvidia.com> (raw)
In-Reply-To: <20260306-cmdq-continuation-v6-0-cc7b629200ee@nvidia.com>
On Fri Mar 6, 2026 at 4:21 PM JST, Eliot Courtney wrote:
> GSP commands over 16 pages need to be sent using "continuation records"
> which essentially means splitting the payload over multiple commands.
>
> This series adds a command type `ContinuationRecord` which just writes
> its header and whatever payload it is given. It also adds types
> `SplitState` and `SplitCommand` which support splitting a large RPC
> into smaller ones while transparently letting regular sized RPCs be sent
> without extra copies.
>
> The send pathway uses `SplitState` to send all commands, but if
> the command fits into 16 pages, it still writes directly into the
> command queue. If it is larger than 16 pages and needs continuation
> records, it writes into a staging buffer, so there is one copy.
>
> Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
Merged to drm-rust-next, thanks!
prev parent reply other threads:[~2026-03-10 7:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 7:21 [PATCH v6 0/9] gpu: nova-core: gsp: add continuation record support Eliot Courtney
2026-03-06 7:21 ` [PATCH v6 1/9] gpu: nova-core: gsp: sort `MsgFunction` variants alphabetically Eliot Courtney
2026-03-06 7:21 ` [PATCH v6 2/9] gpu: nova-core: gsp: add mechanism to wait for space on command queue Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 3/9] rust: add EMSGSIZE error code Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 4/9] gpu: nova-core: gsp: add checking oversized commands Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 5/9] gpu: nova-core: gsp: clarify invariant on command queue Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 6/9] gpu: nova-core: gsp: unconditionally call variable payload handling Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 7/9] gpu: nova-core: gsp: add `size` helper to `CommandToGsp` Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 8/9] gpu: nova-core: gsp: support large RPCs via continuation record Eliot Courtney
2026-03-06 7:22 ` [PATCH v6 9/9] gpu: nova-core: gsp: add tests for continuation records Eliot Courtney
2026-03-10 7:44 ` Alexandre Courbot [this message]
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