From: Shashank Sharma <contactshashanksharma@xxxxxxxxx> This patch series introduces AMDGPU usermode graphics queues. User queues is a method of GPU workload submission into the graphics hardware without any interaction with kernel/DRM schedulers. In this method, a userspace graphics application can create its own workqueue and submit it directly in the GPU HW. The general idea of how this is supposed to work: - The application creates the following GPU objetcs: - A queue object to hold the workload packets. - A read pointer object. - A write pointer object. - A doorbell page. - Kernel picks any 32-bit offset in the doorbell page for this queue. - The application uses the usermode_queue_create IOCTL introduced in this patch, by passing the the GPU addresses of these objects (read ptr, write ptr, queue base address and doorbell address) - The kernel creates the queue and maps it in the HW. - The application can start submitting the data in the queue as soon as the kernel IOCTL returns. - Once the data is filled in the queue, the app must write the number of dwords in the doorbell offset, and the GPU will start fetching the data. libDRM changes for this series and a sample DRM test program can be found in the MESA merge request here: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/287 The RFC patch series and previous discussion can be seen here: https://patchwork.freedesktop.org/series/112214/ This patch series needs the doorbell re-design changes, which are being reviewed here: https://patchwork.freedesktop.org/series/113669/ In absence of the doorbell patches, this patch series uses a hack patch to test the functionality. That hack patch is also published here at the end of the series, just for reference. Alex Deucher (1): drm/amdgpu: UAPI for user queue management Arvind Yadav (2): drm/amdgpu: add new parameters in v11_struct drm/amdgpu: map wptr BO into GART Shashank Sharma (6): drm/amdgpu: add usermode queue base code drm/amdgpu: add new IOCTL for usermode queue drm/amdgpu: create GFX-gen11 MQD for userqueue drm/amdgpu: create context space for usermode queue drm/amdgpu: map usermode queue into MES drm/amdgpu: create doorbell index of the userqueue drivers/gpu/drm/amd/amdgpu/Makefile | 3 + drivers/gpu/drm/amd/amdgpu/amdgpu.h | 10 +- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 6 + drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 325 ++++++++++++++++++ .../drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c | 230 +++++++++++++ .../gpu/drm/amd/include/amdgpu_userqueue.h | 66 ++++ drivers/gpu/drm/amd/include/v11_structs.h | 16 +- include/uapi/drm/amdgpu_drm.h | 55 +++ 9 files changed, 704 insertions(+), 9 deletions(-) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue_gfx_v11.c create mode 100644 drivers/gpu/drm/amd/include/amdgpu_userqueue.h -- 2.34.1
