netdev - Re: [PATCH net-next v3 7/7] bnxt_en: add support for device memory tcp

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Message-ID: <20241014171636.3b5b7383@kernel.org>
Date: Mon, 14 Oct 2024 17:16:36 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Mina Almasry <almasrymina@...gle.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>, Leon Romanovsky <leonro@...dia.com>,
 Christian König <christian.koenig@....com>, Samiullah
 Khawaja <skhawaja@...gle.com>, Taehee Yoo <ap420073@...il.com>,
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Subject: Re: [PATCH net-next v3 7/7] bnxt_en: add support for device memory
 tcp

On Tue, 15 Oct 2024 01:38:20 +0300 Mina Almasry wrote:
> Thanks Jason. In that case I agree with Jakub we should take in his change here:
> 
> https://lore.kernel.org/netdev/20241009170102.1980ed1d@kernel.org/
> 
> With this change the driver would delegate dma_sync_for_device to the
> page_pool, and the page_pool will skip it altogether for the dma-buf
> memory provider.

And we need a wrapper for a sync for CPU which will skip if the page
comes from an unreadable pool?