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RE: [PATCH v5 03/13] virtio-gpu: Add udmabuf helpers
From: |
Kasireddy, Vivek |
Subject: |
RE: [PATCH v5 03/13] virtio-gpu: Add udmabuf helpers |
Date: |
Mon, 24 May 2021 20:37:04 +0000 |
Hi Gerd,
>
> > +#ifdef CONFIG_LINUX
>
> > +void virtio_gpu_init_udmabuf(struct virtio_gpu_simple_resource *res)
>
> > +#else
>
> > +void *virtio_gpu_init_udmabuf(struct virtio_gpu_simple_resource *res)
> > +{
> > + /* nothing (stub) */
> > + return NULL
> > +}
>
> Fails to build for !linux ...
>
> You can place the stubs in a file in the stubs/ directory instead.
> They'll be used via weak symbol references instead of #ifdefs then.
>
> Advantage: the stubs are compiled unconditionally so errors like this
> don't go unnoticed that easily.
[Kasireddy, Vivek] Gave it a try but because of res->image, we'd need to
consider the
Pixman dependency. I think we have the following options to address this:
1) Add pixman dependency to stubs. This may not be acceptable given that the
other
dependencies are glib, socket, etc which are pretty basic.
2) Cast the objects (such as virtio_gpu_simple_resource) as void * to the
functions that
we have stubs for. This also may not be acceptable as I don't see other stubs
doing this.
3) Move some core objects (such as VirtIOGPUBase and its dependencies that do
not
deal with pixman) into a new header and include that in virtio-gpu.h and the
new stubs
file. This seems like the way to go but needs some work as virtio-gpu.h has a
lot of stuff
and is included in a lot of places. If it is not a problem, I can do this in a
small separate
series but keep the ifdef for this series?
Will send out a v6 for this series soon.
Thanks,
Vivek
>
> take care,
> Gerd
[PATCH v5 06/13] virtio-gpu: Refactor virtio_gpu_create_mapping_iov, Vivek Kasireddy, 2021/05/18
[PATCH v5 05/13] virtio-gpu: Refactor virtio_gpu_set_scanout, Vivek Kasireddy, 2021/05/18
[PATCH v5 04/13] virtio-gpu: Add virtio_gpu_find_check_resource, Vivek Kasireddy, 2021/05/18
[PATCH v5 07/13] virtio-gpu: Add initial definitions for blob resources, Vivek Kasireddy, 2021/05/18
[PATCH v5 08/13] virtio-gpu: Add virtio_gpu_resource_create_blob, Vivek Kasireddy, 2021/05/18
[PATCH v5 10/13] virtio-gpu: Add helpers to create and destroy dmabuf objects, Vivek Kasireddy, 2021/05/18
[PATCH v5 11/13] virtio-gpu: Factor out update scanout, Vivek Kasireddy, 2021/05/18
[PATCH v5 09/13] ui/pixman: Add qemu_pixman_to_drm_format(), Vivek Kasireddy, 2021/05/18