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26#include <drm/drmP.h>
27#include <drm/drm_fb_helper.h>
28#include "virtgpu_drv.h"
29
30#define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
31
32struct 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;
37};
38
39static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
40 bool store, int x, int y,
41 int width, int height)
42{
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];
47 int x2, y2;
48 unsigned long flags;
49 struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->obj);
50
51 if ((width <= 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",
55 width, height, x, y,
56 fb->base.width, fb->base.height);
57 return -EINVAL;
58 }
59
60
61
62
63
64
65
66
67 if (in_atomic() || store)
68 store_for_later = true;
69
70 x2 = x + width - 1;
71 y2 = y + height - 1;
72
73 spin_lock_irqsave(&fb->dirty_lock, flags);
74
75 if (fb->y1 < y)
76 y = fb->y1;
77 if (fb->y2 > y2)
78 y2 = fb->y2;
79 if (fb->x1 < x)
80 x = fb->x1;
81 if (fb->x2 > x2)
82 x2 = fb->x2;
83
84 if (store_for_later) {
85 fb->x1 = x;
86 fb->x2 = x2;
87 fb->y1 = y;
88 fb->y2 = y2;
89 spin_unlock_irqrestore(&fb->dirty_lock, flags);
90 return 0;
91 }
92
93 fb->x1 = fb->y1 = INT_MAX;
94 fb->x2 = fb->y2 = 0;
95
96 spin_unlock_irqrestore(&fb->dirty_lock, flags);
97
98 {
99 uint32_t offset;
100 uint32_t w = x2 - x + 1;
101 uint32_t h = y2 - y + 1;
102
103 offset = (y * fb->base.pitches[0]) + x * bpp;
104
105 virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
106 offset,
107 cpu_to_le32(w),
108 cpu_to_le32(h),
109 cpu_to_le32(x),
110 cpu_to_le32(y),
111 NULL);
112
113 }
114 virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
115 x, y, x2 - x + 1, y2 - y + 1);
116 return 0;
117}
118
119int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
120 struct drm_clip_rect *clips,
121 unsigned int num_clips)
122{
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;
128 int i;
129 int inc = 1;
130
131 if (!num_clips) {
132 num_clips = 1;
133 clips = &norect;
134 norect.x1 = norect.y1 = 0;
135 norect.x2 = vgfb->base.width;
136 norect.y2 = vgfb->base.height;
137 }
138 left = clips->x1;
139 right = clips->x2;
140 top = clips->y1;
141 bottom = clips->y2;
142
143
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);
150 }
151
152 if (obj->dumb)
153 return virtio_gpu_dirty_update(vgfb, false, left, top,
154 right - left, bottom - top);
155
156 virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
157 left, top, right - left, bottom - top);
158 return 0;
159}
160
161static void virtio_gpu_fb_dirty_work(struct work_struct *work)
162{
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;
167
168 virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
169 vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
170}
171
172static void virtio_gpu_3d_fillrect(struct fb_info *info,
173 const struct fb_fillrect *rect)
174{
175 struct virtio_gpu_fbdev *vfbdev = info->par;
176
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);
181}
182
183static void virtio_gpu_3d_copyarea(struct fb_info *info,
184 const struct fb_copyarea *area)
185{
186 struct virtio_gpu_fbdev *vfbdev = info->par;
187
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);
192}
193
194static void virtio_gpu_3d_imageblit(struct fb_info *info,
195 const struct fb_image *image)
196{
197 struct virtio_gpu_fbdev *vfbdev = info->par;
198
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);
203}
204
205static 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,
211};
212
213static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
214 struct virtio_gpu_object *obj)
215{
216 return virtio_gpu_object_kmap(obj, NULL);
217}
218
219static int virtio_gpufb_create(struct drm_fb_helper *helper,
220 struct drm_fb_helper_surface_size *sizes)
221{
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;
231 int ret;
232
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);
237
238 format = virtio_gpu_translate_format(mode_cmd.pixel_format);
239 if (format == 0)
240 return -EINVAL;
241
242 size = mode_cmd.pitches[0] * mode_cmd.height;
243 obj = virtio_gpu_alloc_object(dev, size, false, true);
244 if (IS_ERR(obj))
245 return PTR_ERR(obj);
246
247 virtio_gpu_resource_id_get(vgdev, &resid);
248 virtio_gpu_cmd_create_resource(vgdev, resid, format,
249 mode_cmd.width, mode_cmd.height);
250
251 ret = virtio_gpu_vmap_fb(vgdev, obj);
252 if (ret) {
253 DRM_ERROR("failed to vmap fb %d\n", ret);
254 goto err_obj_vmap;
255 }
256
257
258 ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
259 if (ret)
260 goto err_obj_attach;
261
262 info = drm_fb_helper_alloc_fbi(helper);
263 if (IS_ERR(info)) {
264 ret = PTR_ERR(info);
265 goto err_fb_alloc;
266 }
267
268 info->par = helper;
269
270 ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
271 &mode_cmd, &obj->gem_base);
272 if (ret)
273 goto err_fb_alloc;
274
275 fb = &vfbdev->vgfb.base;
276
277 vfbdev->helper.fb = fb;
278
279 strcpy(info->fix.id, "virtiodrmfb");
280 info->fbops = &virtio_gpufb_ops;
281 info->pixmap.flags = FB_PIXMAP_SYSTEM;
282
283 info->screen_base = 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);
288
289 info->fix.mmio_start = 0;
290 info->fix.mmio_len = 0;
291 return 0;
292
293err_fb_alloc:
294 virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
295err_obj_attach:
296err_obj_vmap:
297 virtio_gpu_gem_free_object(&obj->gem_base);
298 return ret;
299}
300
301static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
302 struct virtio_gpu_fbdev *vgfbdev)
303{
304 struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
305
306 drm_fb_helper_unregister_fbi(&vgfbdev->helper);
307
308 if (vgfb->obj)
309 vgfb->obj = NULL;
310 drm_fb_helper_fini(&vgfbdev->helper);
311 drm_framebuffer_cleanup(&vgfb->base);
312
313 return 0;
314}
315static const struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
316 .fb_probe = virtio_gpufb_create,
317};
318
319int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
320{
321 struct virtio_gpu_fbdev *vgfbdev;
322 int bpp_sel = 32;
323 int ret;
324
325 vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
326 if (!vgfbdev)
327 return -ENOMEM;
328
329 vgfbdev->vgdev = vgdev;
330 vgdev->vgfbdev = vgfbdev;
331 INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
332
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);
337 if (ret) {
338 kfree(vgfbdev);
339 return ret;
340 }
341
342 drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
343 drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
344 return 0;
345}
346
347void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
348{
349 if (!vgdev->vgfbdev)
350 return;
351
352 virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
353 kfree(vgdev->vgfbdev);
354 vgdev->vgfbdev = NULL;
355}
356
