Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
e20eaa2382
Add VFIO_DEVICE_QUERY_GFX_PLANE ioctl command to let user query and get a plane and its information. So far, two types of buffers are supported: buffers based on dma-buf and buffers based on region. This ioctl can be invoked with: 1) Either DMABUF or REGION flag. Vendor driver returns a plane_info successfully only when the specific kind of buffer is supported. 2) Flag PROBE. And at the same time either DMABUF or REGION must be set, so that vendor driver returns success only when the specific kind of buffer is supported. Add VFIO_DEVICE_GET_GFX_DMABUF ioctl command to let user get a specific dma-buf fd of an exposed MDEV buffer provided by dmabuf_id which was returned in VFIO_DEVICE_QUERY_GFX_PLANE ioctl command. The life cycle of an exposed MDEV buffer is handled by userspace and tracked by kernel space. The returned dmabuf_id in struct vfio_device_ query_gfx_plane can be a new id of a new exposed buffer or an old id of a re-exported buffer. Host user can check the value of dmabuf_id to see if it needs to create new resources according to the new exposed buffer or just re-use the existing resource related to the old buffer. v18: - update comments for VFIO_DEVICE_GET_GFX_DMABUF. (Alex) v17: - modify VFIO_DEVICE_GET_GFX_DMABUF interface. (Alex) v16: - add x_hot and y_hot fields. (Gerd) - add comments for VFIO_DEVICE_GET_GFX_DMABUF. (Alex) - rebase to 4.14.0-rc6. v15: - add a ioctl to get a dmabuf for a given dmabuf id. (Gerd) v14: - add PROBE, DMABUF and REGION flags. (Alex) v12: - add drm_format_mod back. (Gerd and Zhenyu) - add region_index. (Gerd) v11: - rename plane_type to drm_plane_type. (Gerd) - move fields of vfio_device_query_gfx_plane to vfio_device_gfx_plane_info. (Gerd) - remove drm_format_mod, start fields. (Daniel) - remove plane_id. v10: - refine the ABI API VFIO_DEVICE_QUERY_GFX_PLANE. (Alex) (Gerd) v3: - add a field gvt_plane_info in the drm_i915_gem_obj structure to save the decoded plane information to avoid look up while need the plane info. (Gerd) Signed-off-by: Tina Zhang <tina.zhang@intel.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.