From: Christoph Hellwig <hch@infradead.org>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: linux-block@vger.kernel.org, io-uring@vger.kernel.org,
"Vishal Verma" <vishal1.verma@intel.com>,
tushar.gohad@intel.com, "Keith Busch" <kbusch@kernel.org>,
"Jens Axboe" <axboe@kernel.dk>, "Christoph Hellwig" <hch@lst.de>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Christian Brauner" <brauner@kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-fsdevel@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org
Subject: Re: [RFC v2 01/11] file: add callback for pre-mapping dmabuf
Date: Thu, 4 Dec 2025 02:42:31 -0800 [thread overview]
Message-ID: <aTFllxgsNCzGdzKB@infradead.org> (raw)
In-Reply-To: <74d689540fa200fe37f1a930165357a92fe9e68c.1763725387.git.asml.silence@gmail.com>
On Sun, Nov 23, 2025 at 10:51:21PM +0000, Pavel Begunkov wrote:
> +static inline struct dma_token *
> +dma_token_create(struct file *file, struct dma_token_params *params)
> +{
> + struct dma_token *res;
> +
> + if (!file->f_op->dma_map)
> + return ERR_PTR(-EOPNOTSUPP);
> + res = file->f_op->dma_map(file, params);
Calling the file operation ->dmap_map feels really misleading.
create_token as in the function name is already much better, but
it really is not just dma, but dmabuf related, and that should really
be encoded in the name.
Also why not pass the dmabuf and direction directly instead of wrapping
it in the odd params struct making the whole thing hard to follow?
next prev parent reply other threads:[~2025-12-04 10:42 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-23 22:51 [RFC v2 00/11] Add dmabuf read/write via io_uring Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 01/11] file: add callback for pre-mapping dmabuf Pavel Begunkov
2025-12-04 10:42 ` Christoph Hellwig [this message]
2025-12-12 1:02 ` Pavel Begunkov
2025-12-04 10:46 ` Christian König
2025-12-04 11:07 ` Christoph Hellwig
2025-12-04 11:09 ` Christian König
2025-12-04 13:10 ` Christoph Hellwig
2025-11-23 22:51 ` [RFC v2 02/11] iov_iter: introduce iter type for pre-registered dma Pavel Begunkov
2025-12-04 10:43 ` Christoph Hellwig
2025-12-12 1:06 ` Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 03/11] block: move around bio flagging helpers Pavel Begunkov
2025-12-04 10:43 ` Christoph Hellwig
2025-12-12 1:08 ` Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 04/11] block: introduce dma token backed bio type Pavel Begunkov
2025-12-04 10:48 ` Christoph Hellwig
2025-11-23 22:51 ` [RFC v2 05/11] block: add infra to handle dmabuf tokens Pavel Begunkov
2025-11-24 13:38 ` Anuj gupta
2025-12-04 10:56 ` Christoph Hellwig
2025-12-12 1:56 ` Pavel Begunkov
2025-12-04 13:08 ` Christoph Hellwig
2025-11-23 22:51 ` [RFC v2 06/11] nvme-pci: add support for dmabuf reggistration Pavel Begunkov
2025-11-24 13:40 ` Anuj gupta
2025-12-04 11:00 ` Christoph Hellwig
2025-12-04 19:07 ` Keith Busch
2025-11-23 22:51 ` [RFC v2 07/11] nvme-pci: implement dma_token backed requests Pavel Begunkov
2025-12-04 11:04 ` Christoph Hellwig
2025-11-23 22:51 ` [RFC v2 08/11] io_uring/rsrc: add imu flags Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 09/11] io_uring/rsrc: extended reg buffer registration Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 10/11] io_uring/rsrc: add dmabuf-backed buffer registeration Pavel Begunkov
2025-11-23 22:51 ` [RFC v2 11/11] io_uring/rsrc: implement dmabuf regbuf import Pavel Begunkov
2025-11-24 10:33 ` [RFC v2 00/11] Add dmabuf read/write via io_uring Christian König
2025-11-24 11:30 ` Pavel Begunkov
2025-11-24 14:17 ` Christian König
2025-11-25 13:52 ` Pavel Begunkov
2025-11-25 14:21 ` Christian König
2025-11-25 19:40 ` Pavel Begunkov
2025-11-24 13:35 ` Anuj gupta
2025-11-25 12:35 ` Pavel Begunkov
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