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Date: Tue, 5 Mar 2024 18:28:51 -0800
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Subject: Re: [RFC PATCH net-next v6 09/15] memory-provider: dmabuf devmem
 memory provider
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To: Mina Almasry <almasrymina@google.com>, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
 linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org,
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Cc: "David S. Miller" <davem@davemloft.net>,
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,
 Paolo Abeni <pabeni@redhat.com>, Jonathan Corbet <corbet@lwn.net>,
 Richard Henderson <richard.henderson@linaro.org>,
 Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Matt Turner
 <mattst88@gmail.com>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
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 Helge Deller <deller@gmx.de>, Andreas Larsson <andreas@gaisler.com>,
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 Ilias Apalodimas <ilias.apalodimas@linaro.org>,
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 <mhiramat@kernel.org>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
 Arnd Bergmann <arnd@arndb.de>, Alexei Starovoitov <ast@kernel.org>,
 Daniel Borkmann <daniel@iogearbox.net>, Andrii Nakryiko <andrii@kernel.org>,
 Martin KaFai Lau <martin.lau@linux.dev>, Eduard Zingerman
 <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
 Yonghong Song <yonghong.song@linux.dev>,
 John Fastabend <john.fastabend@gmail.com>, KP Singh <kpsingh@kernel.org>,
 Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
 Jiri Olsa <jolsa@kernel.org>, David Ahern <dsahern@kernel.org>,
 Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
 Shuah Khan <shuah@kernel.org>, Sumit Semwal <sumit.semwal@linaro.org>,
 =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>,
 Pavel Begunkov <asml.silence@gmail.com>, Jason Gunthorpe <jgg@ziepe.ca>,
 Yunsheng Lin <linyunsheng@huawei.com>, Shailend Chand <shailend@google.com>,
 Harshitha Ramamurthy <hramamurthy@google.com>,
 Jeroen de Borst <jeroendb@google.com>,
 Praveen Kaligineedi <pkaligineedi@google.com>,
 Willem de Bruijn <willemb@google.com>, Kaiyuan Zhang <kaiyuanz@google.com>
References: <20240305020153.2787423-1-almasrymina@google.com>
 <20240305020153.2787423-10-almasrymina@google.com>
From: David Wei <dw@davidwei.uk>
In-Reply-To: <20240305020153.2787423-10-almasrymina@google.com>
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On 2024-03-04 18:01, Mina Almasry wrote:
> +	if (pool->p.queue)
> +		binding = READ_ONCE(pool->p.queue->binding);
> +
> +	if (binding) {
> +		pool->mp_ops = &dmabuf_devmem_ops;
> +		pool->mp_priv = binding;
> +	}

This is specific to TCP devmem. For ZC Rx we will need something more
generic to let us pass our own memory provider backend down to the page
pool.

What about storing ops and priv void ptr in struct netdev_rx_queue
instead? Then we can both use it.