Descriptor chains of three descriptors were not having the last
descriptor parsed correctly which resulted in some commands not
properly being responded to.
BUG=None
TEST=build with --features=gpu; null_platform_test
Change-Id: Ia77c7ca485ded7cdcb71fd62e8f6be5c226df1bf
Reviewed-on: https://chromium-review.googlesource.com/1073956
Commit-Ready: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
The original methods for reading and writing to GPU buffers naively
assumed that the mappings returned by GBM were to the first byte in the
buffer. In fact, the returned mapping is to the first pixel of the
mapped rectangle. This would lead to segaults when the copy routine
would breeze past the end of the mapping into segault territory.
This change fixes the read and write algorithms and adds lots more guard
rails in to prevent future undefined behavior (hopefully).
TEST=boot kernel with VT and VIRTIO_GPU
BUG=None
Change-Id: Ia7c968b6dd274551b6d218e2f0b255af6e55bd35
Reviewed-on: https://chromium-review.googlesource.com/1102110
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Basic 2D and 3D support is there. The drm_cursor_test and
null_platform_test in drm-tests should run to completion.
The extra device is hidden behind both a build time feature called 'gpu'
and the device is only added to a VM if the '--gpu' flag is given.
TEST=build with --features=gpu;
drm_cursor_test && null_platform_test
BUG=chromium:837073
Change-Id: Ic91acaaebbee395599d7e1ba41c24c9ed2d84169
Reviewed-on: https://chromium-review.googlesource.com/1036862
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
