drm/i915/ttm: Embed a ttm buffer object in the i915 gem object
Embed a struct ttm_buffer_object into the i915 gem object, making sure we alias the gem object part. It's a bit unfortunate that the struct ttm_buffer_ojbect embeds a gem object since we otherwise could make the TTM part private to the TTM backend, and use the usual i915 gem object for the other backends. To make this a bit more storage efficient for the other backends, we'd have to use a pointer for the gem object which would require a lot of changes in the driver. We postpone that for later. Signed-off-by:Thomas Hellström <thomas.hellstrom@linux.intel.com> Acked-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by:
Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210602083818.241793-3-thomas.hellstrom@linux.intel.com
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d1487389
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