forked from Minki/linux
dc5698e80c
This patch adds a kms driver for the virtio gpu. The xorg modesetting driver can handle the device just fine, the framebuffer for fbcon is there too. Qemu patches for the host side are under review currently. The pci version of the device comes in two variants: with and without vga compatibility. The former has a extra memory bar for the vga framebuffer, the later is a pure virtio device. The only concern for this driver is that in the virtio-vga case we have to kick out the firmware framebuffer. Initial revision has only 2d support, 3d (virgl) support requires some more work on the qemu side and will be added later. Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com>
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*
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* Copyright (C) 2015 Red Hat, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "virtgpu_drv.h"
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_atomic_helper.h>
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static const uint32_t virtio_gpu_formats[] = {
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_BGRX8888,
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DRM_FORMAT_BGRA8888,
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DRM_FORMAT_RGBX8888,
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DRM_FORMAT_RGBA8888,
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DRM_FORMAT_XBGR8888,
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DRM_FORMAT_ABGR8888,
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};
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static void virtio_gpu_plane_destroy(struct drm_plane *plane)
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{
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kfree(plane);
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}
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static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
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.update_plane = drm_atomic_helper_update_plane,
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.disable_plane = drm_atomic_helper_disable_plane,
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.destroy = virtio_gpu_plane_destroy,
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.reset = drm_atomic_helper_plane_reset,
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.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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};
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static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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return 0;
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}
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static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct drm_device *dev = plane->dev;
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struct virtio_gpu_device *vgdev = dev->dev_private;
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struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
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struct virtio_gpu_framebuffer *vgfb;
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struct virtio_gpu_object *bo;
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uint32_t handle;
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if (plane->fb) {
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vgfb = to_virtio_gpu_framebuffer(plane->fb);
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bo = gem_to_virtio_gpu_obj(vgfb->obj);
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handle = bo->hw_res_handle;
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} else {
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handle = 0;
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}
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DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
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plane->state->crtc_w, plane->state->crtc_h,
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plane->state->crtc_x, plane->state->crtc_y);
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virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
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plane->state->crtc_w,
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plane->state->crtc_h,
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plane->state->crtc_x,
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plane->state->crtc_y);
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}
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static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = {
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.atomic_check = virtio_gpu_plane_atomic_check,
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.atomic_update = virtio_gpu_plane_atomic_update,
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};
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struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
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int index)
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{
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struct drm_device *dev = vgdev->ddev;
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struct drm_plane *plane;
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int ret;
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plane = kzalloc(sizeof(*plane), GFP_KERNEL);
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if (!plane)
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return ERR_PTR(-ENOMEM);
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ret = drm_universal_plane_init(dev, plane, 1 << index,
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&virtio_gpu_plane_funcs,
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virtio_gpu_formats,
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ARRAY_SIZE(virtio_gpu_formats),
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DRM_PLANE_TYPE_PRIMARY);
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if (ret)
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goto err_plane_init;
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drm_plane_helper_add(plane, &virtio_gpu_plane_helper_funcs);
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return plane;
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err_plane_init:
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kfree(plane);
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return ERR_PTR(ret);
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}
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