From: "Huang, Honglei" <honghuan@amd.com>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: gurchetansingh@chromium.org, olvaffe@gmail.com,
Ray.Huang@amd.com, dri-devel@lists.freedesktop.org,
virtualization@lists.linux.dev, linux-kernel@vger.kernel.org,
odaki@rsg.ci.i.u-tokyo.ac.jp, airlied@redhat.com,
kraxel@redhat.com
Subject: Re: [RFC PATCH v9 3/4] drm/virtio: implement userptr resource support
Date: Sat, 10 Oct 2026 15:36:20 +0800 [thread overview]
Message-ID: <16241811-671c-4962-aa3c-ac8f3ffb4f2c@amd.com> (raw)
In-Reply-To: <69e33ec9-a0bc-4d02-b20d-9c0c03236a42@collabora.com>
On 10/10/2026 2:32 AM, Dmitry Osipenko wrote:
> 24.09.2026 12:55, Honglei Huang пишет:
>> +static struct dma_buf *
>> +virtio_gpu_userptr_prime_export(struct drm_gem_object *obj, int flags)
>> +{
>> + return ERR_PTR(-EINVAL);
>> +}
>> +
>> +static const struct drm_gem_object_funcs virtio_gpu_userptr_funcs = {
>> + .open = virtio_gpu_gem_object_open,
>> + .close = virtio_gpu_gem_object_close,
>> + .free = virtio_gpu_userptr_free,
>> + .export = virtio_gpu_userptr_prime_export,
>> +};
>
> Is virtio_gpu_userptr_prime_export() optional?
>
Yes it is optional, but if not set this callback then .export will
fallback to drm_gem_prime_export, userptr can not support the export
feature, to prevent silent failure, an explicit registration method is
used here to ensure it is not supported.
Regards,
Honglei
next prev parent reply other threads:[~2026-10-10 7:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-24 9:55 [RFC PATCH v9 0/4] virtio-gpu: Add userptr support for compute workloads Honglei Huang
2026-09-24 9:55 ` [RFC PATCH v9 1/4] drm/virtio-gpu: Add VIRTIO_GPU_CAPSET_ROCM capability Honglei Huang
2026-09-24 10:03 ` sashiko-bot
2026-09-24 9:55 ` [RFC PATCH v9 2/4] drm/virtgpu api: add blob userptr resource Honglei Huang
2026-09-24 10:04 ` sashiko-bot
2026-09-24 9:55 ` [RFC PATCH v9 3/4] drm/virtio: implement userptr resource support Honglei Huang
2026-09-24 10:07 ` sashiko-bot
2026-09-26 11:33 ` Akihiko Odaki
2026-09-28 16:22 ` Huang, Honglei
2026-09-28 17:25 ` Akihiko Odaki
2026-09-29 2:22 ` Huang, Honglei
2026-09-30 4:56 ` Akihiko Odaki
2026-09-30 13:32 ` Huang, Honglei
2026-10-09 18:32 ` Dmitry Osipenko
2026-10-10 7:36 ` Huang, Honglei [this message]
2026-10-09 18:38 ` Dmitry Osipenko
2026-10-09 18:46 ` Dmitry Osipenko
2026-10-10 7:36 ` Huang, Honglei
2026-10-09 18:53 ` Dmitry Osipenko
2026-10-10 7:37 ` Huang, Honglei
2026-09-24 9:55 ` [RFC PATCH v9 4/4] drm/virtio: wire blob ioctl creation to userptr objects Honglei Huang
2026-09-24 10:04 ` sashiko-bot
2026-09-27 1:04 ` Akihiko Odaki
2026-09-28 16:23 ` Huang, Honglei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=16241811-671c-4962-aa3c-ac8f3ffb4f2c@amd.com \
--to=honghuan@amd.com \
--cc=Ray.Huang@amd.com \
--cc=airlied@redhat.com \
--cc=dmitry.osipenko@collabora.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=gurchetansingh@chromium.org \
--cc=kraxel@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=odaki@rsg.ci.i.u-tokyo.ac.jp \
--cc=olvaffe@gmail.com \
--cc=virtualization@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox