2 * Copyright (C) 2015 Red Hat, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 #include <drm/drm_fb_helper.h>
28 #include "virtgpu_drv.h"
30 #define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
32 struct virtio_gpu_fbdev {
33 struct drm_fb_helper helper;
34 struct virtio_gpu_framebuffer vgfb;
35 struct virtio_gpu_device *vgdev;
36 struct delayed_work work;
39 static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
40 bool store, int x, int y,
41 int width, int height)
43 struct drm_device *dev = fb->base.dev;
44 struct virtio_gpu_device *vgdev = dev->dev_private;
45 bool store_for_later = false;
46 int bpp = fb->base.format->cpp[0];
49 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);
52 (x + width > fb->base.width) ||
53 (y + height > fb->base.height)) {
54 DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
56 fb->base.width, fb->base.height);
61 * Can be called with pretty much any context (console output
62 * path). If we are in atomic just store the dirty rect info
63 * to send out the update later.
65 * Can't test inside spin lock.
67 if (in_atomic() || store)
68 store_for_later = true;
73 spin_lock_irqsave(&fb->dirty_lock, flags);
84 if (store_for_later) {
89 spin_unlock_irqrestore(&fb->dirty_lock, flags);
93 fb->x1 = fb->y1 = INT_MAX;
96 spin_unlock_irqrestore(&fb->dirty_lock, flags);
100 uint32_t w = x2 - x + 1;
101 uint32_t h = y2 - y + 1;
103 offset = (y * fb->base.pitches[0]) + x * bpp;
105 virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
114 virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
115 x, y, x2 - x + 1, y2 - y + 1);
119 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
120 struct drm_clip_rect *clips,
121 unsigned int num_clips)
123 struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
124 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
125 struct drm_clip_rect norect;
126 struct drm_clip_rect *clips_ptr;
127 int left, right, top, bottom;
134 norect.x1 = norect.y1 = 0;
135 norect.x2 = vgfb->base.width;
136 norect.y2 = vgfb->base.height;
143 /* skip the first clip rect */
144 for (i = 1, clips_ptr = clips + inc;
145 i < num_clips; i++, clips_ptr += inc) {
146 left = min_t(int, left, (int)clips_ptr->x1);
147 right = max_t(int, right, (int)clips_ptr->x2);
148 top = min_t(int, top, (int)clips_ptr->y1);
149 bottom = max_t(int, bottom, (int)clips_ptr->y2);
153 return virtio_gpu_dirty_update(vgfb, false, left, top,
154 right - left, bottom - top);
156 virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
157 left, top, right - left, bottom - top);
161 static void virtio_gpu_fb_dirty_work(struct work_struct *work)
163 struct delayed_work *delayed_work = to_delayed_work(work);
164 struct virtio_gpu_fbdev *vfbdev =
165 container_of(delayed_work, struct virtio_gpu_fbdev, work);
166 struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
168 virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
169 vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
172 static void virtio_gpu_3d_fillrect(struct fb_info *info,
173 const struct fb_fillrect *rect)
175 struct virtio_gpu_fbdev *vfbdev = info->par;
177 drm_fb_helper_sys_fillrect(info, rect);
178 virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
179 rect->width, rect->height);
180 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
183 static void virtio_gpu_3d_copyarea(struct fb_info *info,
184 const struct fb_copyarea *area)
186 struct virtio_gpu_fbdev *vfbdev = info->par;
188 drm_fb_helper_sys_copyarea(info, area);
189 virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
190 area->width, area->height);
191 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
194 static void virtio_gpu_3d_imageblit(struct fb_info *info,
195 const struct fb_image *image)
197 struct virtio_gpu_fbdev *vfbdev = info->par;
199 drm_fb_helper_sys_imageblit(info, image);
200 virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
201 image->width, image->height);
202 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
205 static struct fb_ops virtio_gpufb_ops = {
206 .owner = THIS_MODULE,
207 DRM_FB_HELPER_DEFAULT_OPS,
208 .fb_fillrect = virtio_gpu_3d_fillrect,
209 .fb_copyarea = virtio_gpu_3d_copyarea,
210 .fb_imageblit = virtio_gpu_3d_imageblit,
213 static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
214 struct virtio_gpu_object *obj)
216 return virtio_gpu_object_kmap(obj, NULL);
219 static int virtio_gpufb_create(struct drm_fb_helper *helper,
220 struct drm_fb_helper_surface_size *sizes)
222 struct virtio_gpu_fbdev *vfbdev =
223 container_of(helper, struct virtio_gpu_fbdev, helper);
224 struct drm_device *dev = helper->dev;
225 struct virtio_gpu_device *vgdev = dev->dev_private;
226 struct fb_info *info;
227 struct drm_framebuffer *fb;
228 struct drm_mode_fb_cmd2 mode_cmd = {};
229 struct virtio_gpu_object *obj;
230 uint32_t resid, format, size;
233 mode_cmd.width = sizes->surface_width;
234 mode_cmd.height = sizes->surface_height;
235 mode_cmd.pitches[0] = mode_cmd.width * 4;
236 mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);
238 format = virtio_gpu_translate_format(mode_cmd.pixel_format);
242 size = mode_cmd.pitches[0] * mode_cmd.height;
243 obj = virtio_gpu_alloc_object(dev, size, false, true);
247 virtio_gpu_resource_id_get(vgdev, &resid);
248 virtio_gpu_cmd_create_resource(vgdev, resid, format,
249 mode_cmd.width, mode_cmd.height);
251 ret = virtio_gpu_vmap_fb(vgdev, obj);
253 DRM_ERROR("failed to vmap fb %d\n", ret);
257 /* attach the object to the resource */
258 ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
262 info = drm_fb_helper_alloc_fbi(helper);
270 ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
271 &mode_cmd, &obj->gem_base);
275 fb = &vfbdev->vgfb.base;
277 vfbdev->helper.fb = fb;
279 strcpy(info->fix.id, "virtiodrmfb");
280 info->fbops = &virtio_gpufb_ops;
281 info->pixmap.flags = FB_PIXMAP_SYSTEM;
283 info->screen_buffer = obj->vmap;
284 info->screen_size = obj->gem_base.size;
285 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
286 drm_fb_helper_fill_var(info, &vfbdev->helper,
287 sizes->fb_width, sizes->fb_height);
289 info->fix.mmio_start = 0;
290 info->fix.mmio_len = 0;
294 virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
297 virtio_gpu_gem_free_object(&obj->gem_base);
301 static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
302 struct virtio_gpu_fbdev *vgfbdev)
304 struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
306 drm_fb_helper_unregister_fbi(&vgfbdev->helper);
308 if (vgfb->base.obj[0])
309 vgfb->base.obj[0] = NULL;
310 drm_fb_helper_fini(&vgfbdev->helper);
311 drm_framebuffer_cleanup(&vgfb->base);
315 static const struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
316 .fb_probe = virtio_gpufb_create,
319 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
321 struct virtio_gpu_fbdev *vgfbdev;
322 int bpp_sel = 32; /* TODO: parameter from somewhere? */
325 vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
329 vgfbdev->vgdev = vgdev;
330 vgdev->vgfbdev = vgfbdev;
331 INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
333 drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
334 &virtio_gpu_fb_helper_funcs);
335 ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
336 VIRTIO_GPUFB_CONN_LIMIT);
342 drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
343 drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
347 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
352 virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
353 kfree(vgdev->vgfbdev);
354 vgdev->vgfbdev = NULL;