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.bits_per_pixel / 8;
49 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->obj);
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,
123 struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
124 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->obj);
125 struct drm_clip_rect norect;
126 struct drm_clip_rect *clips_ptr;
127 int left, right, top, bottom;
133 norect.x1 = norect.y1 = 0;
134 norect.x2 = vgfb->base.width;
135 norect.y2 = vgfb->base.height;
142 /* skip the first clip rect */
143 for (i = 1, clips_ptr = clips + inc;
144 i < num_clips; i++, clips_ptr += inc) {
145 left = min_t(int, left, (int)clips_ptr->x1);
146 right = max_t(int, right, (int)clips_ptr->x2);
147 top = min_t(int, top, (int)clips_ptr->y1);
148 bottom = max_t(int, bottom, (int)clips_ptr->y2);
152 return virtio_gpu_dirty_update(vgfb, false, left, top,
153 right - left, bottom - top);
155 virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
156 left, top, right - left, bottom - top);
160 static void virtio_gpu_fb_dirty_work(struct work_struct *work)
162 struct delayed_work *delayed_work = to_delayed_work(work);
163 struct virtio_gpu_fbdev *vfbdev =
164 container_of(delayed_work, struct virtio_gpu_fbdev, work);
165 struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
167 virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
168 vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
171 static void virtio_gpu_3d_fillrect(struct fb_info *info,
172 const struct fb_fillrect *rect)
174 struct virtio_gpu_fbdev *vfbdev = info->par;
175 drm_fb_helper_sys_fillrect(info, rect);
176 virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
177 rect->width, rect->height);
178 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
181 static void virtio_gpu_3d_copyarea(struct fb_info *info,
182 const struct fb_copyarea *area)
184 struct virtio_gpu_fbdev *vfbdev = info->par;
185 drm_fb_helper_sys_copyarea(info, area);
186 virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
187 area->width, area->height);
188 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
191 static void virtio_gpu_3d_imageblit(struct fb_info *info,
192 const struct fb_image *image)
194 struct virtio_gpu_fbdev *vfbdev = info->par;
195 drm_fb_helper_sys_imageblit(info, image);
196 virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
197 image->width, image->height);
198 schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
201 static struct fb_ops virtio_gpufb_ops = {
202 .owner = THIS_MODULE,
203 .fb_check_var = drm_fb_helper_check_var,
204 .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
205 .fb_fillrect = virtio_gpu_3d_fillrect,
206 .fb_copyarea = virtio_gpu_3d_copyarea,
207 .fb_imageblit = virtio_gpu_3d_imageblit,
208 .fb_pan_display = drm_fb_helper_pan_display,
209 .fb_blank = drm_fb_helper_blank,
210 .fb_setcmap = drm_fb_helper_setcmap,
211 .fb_debug_enter = drm_fb_helper_debug_enter,
212 .fb_debug_leave = drm_fb_helper_debug_leave,
215 static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
216 struct virtio_gpu_object *obj)
218 return virtio_gpu_object_kmap(obj, NULL);
221 static int virtio_gpufb_create(struct drm_fb_helper *helper,
222 struct drm_fb_helper_surface_size *sizes)
224 struct virtio_gpu_fbdev *vfbdev =
225 container_of(helper, struct virtio_gpu_fbdev, helper);
226 struct drm_device *dev = helper->dev;
227 struct virtio_gpu_device *vgdev = dev->dev_private;
228 struct fb_info *info;
229 struct drm_framebuffer *fb;
230 struct drm_mode_fb_cmd2 mode_cmd = {};
231 struct virtio_gpu_object *obj;
232 uint32_t resid, format, size;
235 mode_cmd.width = sizes->surface_width;
236 mode_cmd.height = sizes->surface_height;
237 mode_cmd.pitches[0] = mode_cmd.width * 4;
238 mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);
240 switch (mode_cmd.pixel_format) {
242 case DRM_FORMAT_XRGB8888:
243 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
245 case DRM_FORMAT_ARGB8888:
246 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
248 case DRM_FORMAT_BGRX8888:
249 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
251 case DRM_FORMAT_BGRA8888:
252 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
254 case DRM_FORMAT_RGBX8888:
255 format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
257 case DRM_FORMAT_RGBA8888:
258 format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
260 case DRM_FORMAT_XBGR8888:
261 format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
263 case DRM_FORMAT_ABGR8888:
264 format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
267 case DRM_FORMAT_XRGB8888:
268 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
270 case DRM_FORMAT_ARGB8888:
271 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
273 case DRM_FORMAT_BGRX8888:
274 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
276 case DRM_FORMAT_BGRA8888:
277 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
279 case DRM_FORMAT_RGBX8888:
280 format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
282 case DRM_FORMAT_RGBA8888:
283 format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
285 case DRM_FORMAT_XBGR8888:
286 format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
288 case DRM_FORMAT_ABGR8888:
289 format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
293 DRM_ERROR("failed to find virtio gpu format for %d\n",
294 mode_cmd.pixel_format);
298 size = mode_cmd.pitches[0] * mode_cmd.height;
299 obj = virtio_gpu_alloc_object(dev, size, false, true);
303 virtio_gpu_resource_id_get(vgdev, &resid);
304 virtio_gpu_cmd_create_resource(vgdev, resid, format,
305 mode_cmd.width, mode_cmd.height);
307 ret = virtio_gpu_vmap_fb(vgdev, obj);
309 DRM_ERROR("failed to vmap fb %d\n", ret);
313 /* attach the object to the resource */
314 ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
318 info = drm_fb_helper_alloc_fbi(helper);
326 ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
327 &mode_cmd, &obj->gem_base);
331 fb = &vfbdev->vgfb.base;
333 vfbdev->helper.fb = fb;
335 strcpy(info->fix.id, "virtiodrmfb");
336 info->flags = FBINFO_DEFAULT;
337 info->fbops = &virtio_gpufb_ops;
338 info->pixmap.flags = FB_PIXMAP_SYSTEM;
340 info->screen_base = obj->vmap;
341 info->screen_size = obj->gem_base.size;
342 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
343 drm_fb_helper_fill_var(info, &vfbdev->helper,
344 sizes->fb_width, sizes->fb_height);
346 info->fix.mmio_start = 0;
347 info->fix.mmio_len = 0;
351 drm_fb_helper_release_fbi(helper);
353 virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
356 virtio_gpu_gem_free_object(&obj->gem_base);
360 static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
361 struct virtio_gpu_fbdev *vgfbdev)
363 struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
365 drm_fb_helper_unregister_fbi(&vgfbdev->helper);
366 drm_fb_helper_release_fbi(&vgfbdev->helper);
370 drm_fb_helper_fini(&vgfbdev->helper);
371 drm_framebuffer_cleanup(&vgfb->base);
375 static struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
376 .fb_probe = virtio_gpufb_create,
379 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
381 struct virtio_gpu_fbdev *vgfbdev;
382 int bpp_sel = 32; /* TODO: parameter from somewhere? */
385 vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
389 vgfbdev->vgdev = vgdev;
390 vgdev->vgfbdev = vgfbdev;
391 INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
393 drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
394 &virtio_gpu_fb_helper_funcs);
395 ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
397 VIRTIO_GPUFB_CONN_LIMIT);
403 drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
404 drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
408 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
413 virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
414 kfree(vgdev->vgfbdev);
415 vgdev->vgfbdev = NULL;