[Mesa-dev] [PATCH 0/7] anv: Implement the VK_KHX_external_memory extensions

[Chad Versace]

On Mon 27 Feb 2017, Chad Versace wrote:
> For anyone reading the new extension specs and asking "Wait? What's this
> OPAQUE_FD thing? And why do we have memory import/export for Win32
> handles but not for dma_bufs?".
> 
> There does exist a dma_buf extension, VK_MESAX_external_memory_dma_buf,
> that can do negotiation on DRM format modifiers.  It's a rough draft.
> I'm adding some last-minute polish to it, and then will push it
> somewhere public asap.

I pushed the draft specs of the Vulkan dma_buf extensions here:

    https://github.com/chadversary/vulkan-spec/commits/wip/1.0-VK_MESAX_external

The first, VK_MESAX_external_memory_dma_buf, is complete (other than
needing review feedback).

In the second, VK_MESAX_external_image_dma_buf, the API and header
changes are complete (other than needing review feedback). But I haven't
yet written the actual spec text.

A proper announcement, not hidden in this thread, will come later after
I've refueled my brain with lunch.

> On Mon 27 Feb 2017, Jason Ekstrand wrote:
> > This patch series is an initial implementation of the newly released
> > VK_KHX_external_memory extension family.  These extensions add experimental
> > support image and memory sharing between two Vulkan instances.  Since
> > they're experimental, it's a bit up-for-debate as to whether or not we
> > should actually merge them into master.  This cover letter seems as good a
> > place as any to hold that discussion. :-)
> > 
> > Chad Versace (1):
> >   anv: Implement VK_KHX_external_memory_capabilities
> > 
> > Jason Ekstrand (6):
> >   anv: Add the pci_id into the shader cache UUID
> >   anv: Refactor device_get_cache_uuid into physical_device_init_uuids
> >   anv/physical_device: Rename uuid to pipeline_cache_uuid
> >   util/vk: Add helpers for finding an extension struct
> >   anv: Implement VK_KHX_external_memory
> >   anv: Implement VK_KHX_external_memory_fd
> > 
> >  src/intel/vulkan/anv_device.c           | 186 +++++++++++++++++++++++++++-----
> >  src/intel/vulkan/anv_entrypoints_gen.py |   3 +
> >  src/intel/vulkan/anv_formats.c          |  78 +++++++++++++-
> >  src/intel/vulkan/anv_pipeline_cache.c   |   4 +-
> >  src/intel/vulkan/anv_private.h          |   4 +-
> >  src/util/vk_util.h                      |  17 +++
> >  6 files changed, 261 insertions(+), 31 deletions(-)
> > 
> > -- 
> > 2.5.0.400.gff86faf
> > 
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