linux-stable/drivers/gpu/drm/virtio/virtgpu_fb.c
Daniel Stone 3823da3aeb drm/virtio: Place GEM BOs in drm_framebuffer
Since drm_framebuffer can now store GEM objects directly, place them
there rather than in our own subclass. As this makes the framebuffer
create_handle and destroy functions the same as the GEM framebuffer
helper, we can reuse those.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180330141138.28987-3-daniels@collabora.com
2018-05-18 14:52:33 +01:00

355 lines
9.7 KiB
C

/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include "virtgpu_drv.h"
#define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
struct virtio_gpu_fbdev {
struct drm_fb_helper helper;
struct virtio_gpu_framebuffer vgfb;
struct virtio_gpu_device *vgdev;
struct delayed_work work;
};
static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
bool store, int x, int y,
int width, int height)
{
struct drm_device *dev = fb->base.dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
bool store_for_later = false;
int bpp = fb->base.format->cpp[0];
int x2, y2;
unsigned long flags;
struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);
if ((width <= 0) ||
(x + width > fb->base.width) ||
(y + height > fb->base.height)) {
DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
width, height, x, y,
fb->base.width, fb->base.height);
return -EINVAL;
}
/*
* Can be called with pretty much any context (console output
* path). If we are in atomic just store the dirty rect info
* to send out the update later.
*
* Can't test inside spin lock.
*/
if (in_atomic() || store)
store_for_later = true;
x2 = x + width - 1;
y2 = y + height - 1;
spin_lock_irqsave(&fb->dirty_lock, flags);
if (fb->y1 < y)
y = fb->y1;
if (fb->y2 > y2)
y2 = fb->y2;
if (fb->x1 < x)
x = fb->x1;
if (fb->x2 > x2)
x2 = fb->x2;
if (store_for_later) {
fb->x1 = x;
fb->x2 = x2;
fb->y1 = y;
fb->y2 = y2;
spin_unlock_irqrestore(&fb->dirty_lock, flags);
return 0;
}
fb->x1 = fb->y1 = INT_MAX;
fb->x2 = fb->y2 = 0;
spin_unlock_irqrestore(&fb->dirty_lock, flags);
{
uint32_t offset;
uint32_t w = x2 - x + 1;
uint32_t h = y2 - y + 1;
offset = (y * fb->base.pitches[0]) + x * bpp;
virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
offset,
cpu_to_le32(w),
cpu_to_le32(h),
cpu_to_le32(x),
cpu_to_le32(y),
NULL);
}
virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
x, y, x2 - x + 1, y2 - y + 1);
return 0;
}
int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
struct drm_clip_rect *clips,
unsigned int num_clips)
{
struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
struct drm_clip_rect norect;
struct drm_clip_rect *clips_ptr;
int left, right, top, bottom;
int i;
int inc = 1;
if (!num_clips) {
num_clips = 1;
clips = &norect;
norect.x1 = norect.y1 = 0;
norect.x2 = vgfb->base.width;
norect.y2 = vgfb->base.height;
}
left = clips->x1;
right = clips->x2;
top = clips->y1;
bottom = clips->y2;
/* skip the first clip rect */
for (i = 1, clips_ptr = clips + inc;
i < num_clips; i++, clips_ptr += inc) {
left = min_t(int, left, (int)clips_ptr->x1);
right = max_t(int, right, (int)clips_ptr->x2);
top = min_t(int, top, (int)clips_ptr->y1);
bottom = max_t(int, bottom, (int)clips_ptr->y2);
}
if (obj->dumb)
return virtio_gpu_dirty_update(vgfb, false, left, top,
right - left, bottom - top);
virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
left, top, right - left, bottom - top);
return 0;
}
static void virtio_gpu_fb_dirty_work(struct work_struct *work)
{
struct delayed_work *delayed_work = to_delayed_work(work);
struct virtio_gpu_fbdev *vfbdev =
container_of(delayed_work, struct virtio_gpu_fbdev, work);
struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
}
static void virtio_gpu_3d_fillrect(struct fb_info *info,
const struct fb_fillrect *rect)
{
struct virtio_gpu_fbdev *vfbdev = info->par;
drm_fb_helper_sys_fillrect(info, rect);
virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
rect->width, rect->height);
schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}
static void virtio_gpu_3d_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
struct virtio_gpu_fbdev *vfbdev = info->par;
drm_fb_helper_sys_copyarea(info, area);
virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
area->width, area->height);
schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}
static void virtio_gpu_3d_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct virtio_gpu_fbdev *vfbdev = info->par;
drm_fb_helper_sys_imageblit(info, image);
virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
image->width, image->height);
schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}
static struct fb_ops virtio_gpufb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_fillrect = virtio_gpu_3d_fillrect,
.fb_copyarea = virtio_gpu_3d_copyarea,
.fb_imageblit = virtio_gpu_3d_imageblit,
};
static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *obj)
{
return virtio_gpu_object_kmap(obj, NULL);
}
static int virtio_gpufb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct virtio_gpu_fbdev *vfbdev =
container_of(helper, struct virtio_gpu_fbdev, helper);
struct drm_device *dev = helper->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_mode_fb_cmd2 mode_cmd = {};
struct virtio_gpu_object *obj;
uint32_t resid, format, size;
int ret;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = mode_cmd.width * 4;
mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);
format = virtio_gpu_translate_format(mode_cmd.pixel_format);
if (format == 0)
return -EINVAL;
size = mode_cmd.pitches[0] * mode_cmd.height;
obj = virtio_gpu_alloc_object(dev, size, false, true);
if (IS_ERR(obj))
return PTR_ERR(obj);
virtio_gpu_resource_id_get(vgdev, &resid);
virtio_gpu_cmd_create_resource(vgdev, resid, format,
mode_cmd.width, mode_cmd.height);
ret = virtio_gpu_vmap_fb(vgdev, obj);
if (ret) {
DRM_ERROR("failed to vmap fb %d\n", ret);
goto err_obj_vmap;
}
/* attach the object to the resource */
ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
if (ret)
goto err_obj_attach;
info = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto err_fb_alloc;
}
info->par = helper;
ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
&mode_cmd, &obj->gem_base);
if (ret)
goto err_fb_alloc;
fb = &vfbdev->vgfb.base;
vfbdev->helper.fb = fb;
strcpy(info->fix.id, "virtiodrmfb");
info->fbops = &virtio_gpufb_ops;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
info->screen_buffer = obj->vmap;
info->screen_size = obj->gem_base.size;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
drm_fb_helper_fill_var(info, &vfbdev->helper,
sizes->fb_width, sizes->fb_height);
info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
return 0;
err_fb_alloc:
virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
err_obj_attach:
err_obj_vmap:
virtio_gpu_gem_free_object(&obj->gem_base);
return ret;
}
static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
struct virtio_gpu_fbdev *vgfbdev)
{
struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
drm_fb_helper_unregister_fbi(&vgfbdev->helper);
if (vgfb->base.obj[0])
vgfb->base.obj[0] = NULL;
drm_fb_helper_fini(&vgfbdev->helper);
drm_framebuffer_cleanup(&vgfb->base);
return 0;
}
static const struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
.fb_probe = virtio_gpufb_create,
};
int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
{
struct virtio_gpu_fbdev *vgfbdev;
int bpp_sel = 32; /* TODO: parameter from somewhere? */
int ret;
vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
if (!vgfbdev)
return -ENOMEM;
vgfbdev->vgdev = vgdev;
vgdev->vgfbdev = vgfbdev;
INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
&virtio_gpu_fb_helper_funcs);
ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
VIRTIO_GPUFB_CONN_LIMIT);
if (ret) {
kfree(vgfbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
return 0;
}
void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
{
if (!vgdev->vgfbdev)
return;
virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
kfree(vgdev->vgfbdev);
vgdev->vgfbdev = NULL;
}