From 9b60cdf98723b52d32fdd131f709923e05c0000f Mon Sep 17 00:00:00 2001 From: Vivek Kasireddy Date: Wed, 26 May 2021 16:14:18 -0700 Subject: virtio-gpu: Add udmabuf helpers Add helper functions to create a dmabuf for a resource and mmap it. Also, introduce the fields blob and blob_size so that these helpers can start to use them but the full picture will emerge only after adding create_blob API in patch 8 of this series. To be able to create a dmabuf using the udmabuf driver, Qemu needs to be lauched with the memfd memory backend like this: qemu-system-x86_64 -m 8192m -object memory-backend-memfd,id=mem1,size=8192M -machine memory-backend=mem1 Based-on-patch-by: Gerd Hoffmann Cc: Gerd Hoffmann Signed-off-by: Vivek Kasireddy Message-Id: <20210526231429.1045476-4-vivek.kasireddy@intel.com> Signed-off-by: Gerd Hoffmann --- include/hw/virtio/virtio-gpu.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include') diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h index 8ca2c55d9a..265b1c516c 100644 --- a/include/hw/virtio/virtio-gpu.h +++ b/include/hw/virtio/virtio-gpu.h @@ -50,6 +50,12 @@ struct virtio_gpu_simple_resource { uint32_t scanout_bitmask; pixman_image_t *image; uint64_t hostmem; + + uint64_t blob_size; + void *blob; + int dmabuf_fd; + uint8_t *remapped; + QTAILQ_ENTRY(virtio_gpu_simple_resource) next; }; @@ -238,6 +244,11 @@ void virtio_gpu_update_cursor_data(VirtIOGPU *g, struct virtio_gpu_scanout *s, uint32_t resource_id); +/* virtio-gpu-udmabuf.c */ +bool virtio_gpu_have_udmabuf(void); +void virtio_gpu_init_udmabuf(struct virtio_gpu_simple_resource *res); +void virtio_gpu_fini_udmabuf(struct virtio_gpu_simple_resource *res); + /* virtio-gpu-3d.c */ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g, struct virtio_gpu_ctrl_command *cmd); -- cgit v1.2.3