1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
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:
12 *
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.
16 *
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.
24 */
25
26#include <drm/drm_atomic_helper.h>
27#include <drm/drm_damage_helper.h>
28#include <drm/drm_fourcc.h>
29
30#include "virtgpu_drv.h"
31
32static const uint32_t virtio_gpu_formats[] = {
33 DRM_FORMAT_HOST_XRGB8888,
34};
35
36static const uint32_t virtio_gpu_cursor_formats[] = {
37 DRM_FORMAT_HOST_ARGB8888,
38};
39
40uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
41{
42 uint32_t format;
43
44 switch (drm_fourcc) {
45 case DRM_FORMAT_XRGB8888:
46 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
47 break;
48 case DRM_FORMAT_ARGB8888:
49 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
50 break;
51 case DRM_FORMAT_BGRX8888:
52 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
53 break;
54 case DRM_FORMAT_BGRA8888:
55 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
56 break;
57 default:
58 /*
59 * This should not happen, we handle everything listed
60 * in virtio_gpu_formats[].
61 */
62 format = 0;
63 break;
64 }
65 WARN_ON(format == 0);
66 return format;
67}
68
69static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
70 .update_plane = drm_atomic_helper_update_plane,
71 .disable_plane = drm_atomic_helper_disable_plane,
72 .reset = drm_atomic_helper_plane_reset,
73 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
74 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
75};
76
77static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
78 struct drm_atomic_state *state)
79{
80 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
81 plane);
82 struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
83 plane);
84 bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
85 struct drm_crtc_state *crtc_state;
86 int ret;
87
88 if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
89 return 0;
90
91 /*
92 * Ignore damage clips if the framebuffer attached to the plane's state
93 * has changed since the last plane update (page-flip). In this case, a
94 * full plane update should happen because uploads are done per-buffer.
95 */
96 if (old_plane_state->fb != new_plane_state->fb)
97 new_plane_state->ignore_damage_clips = true;
98
99 crtc_state = drm_atomic_get_crtc_state(state,
100 crtc: new_plane_state->crtc);
101 if (IS_ERR(ptr: crtc_state))
102 return PTR_ERR(ptr: crtc_state);
103
104 ret = drm_atomic_helper_check_plane_state(plane_state: new_plane_state, crtc_state,
105 DRM_PLANE_NO_SCALING,
106 DRM_PLANE_NO_SCALING,
107 can_position: is_cursor, can_update_disabled: true);
108 return ret;
109}
110
111static void virtio_gpu_update_dumb_bo(struct virtio_gpu_device *vgdev,
112 struct drm_plane_state *state,
113 struct drm_rect *rect)
114{
115 struct virtio_gpu_object *bo =
116 gem_to_virtio_gpu_obj(state->fb->obj[0]);
117 struct virtio_gpu_object_array *objs;
118 uint32_t w = rect->x2 - rect->x1;
119 uint32_t h = rect->y2 - rect->y1;
120 uint32_t x = rect->x1;
121 uint32_t y = rect->y1;
122 uint32_t off = x * state->fb->format->cpp[0] +
123 y * state->fb->pitches[0];
124
125 objs = virtio_gpu_array_alloc(nents: 1);
126 if (!objs)
127 return;
128 virtio_gpu_array_add_obj(objs, obj: &bo->base.base);
129
130 virtio_gpu_cmd_transfer_to_host_2d(vgdev, offset: off, width: w, height: h, x, y,
131 objs, NULL);
132}
133
134static void virtio_gpu_resource_flush(struct drm_plane *plane,
135 uint32_t x, uint32_t y,
136 uint32_t width, uint32_t height)
137{
138 struct drm_device *dev = plane->dev;
139 struct virtio_gpu_device *vgdev = dev->dev_private;
140 struct virtio_gpu_framebuffer *vgfb;
141 struct virtio_gpu_object *bo;
142
143 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
144 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
145 if (vgfb->fence) {
146 struct virtio_gpu_object_array *objs;
147
148 objs = virtio_gpu_array_alloc(nents: 1);
149 if (!objs)
150 return;
151 virtio_gpu_array_add_obj(objs, obj: vgfb->base.obj[0]);
152 virtio_gpu_array_lock_resv(objs);
153 virtio_gpu_cmd_resource_flush(vgdev, resource_id: bo->hw_res_handle, x, y,
154 width, height, objs, fence: vgfb->fence);
155 virtio_gpu_notify(vgdev);
156
157 dma_fence_wait_timeout(&vgfb->fence->f, intr: true,
158 timeout: msecs_to_jiffies(m: 50));
159 dma_fence_put(fence: &vgfb->fence->f);
160 vgfb->fence = NULL;
161 } else {
162 virtio_gpu_cmd_resource_flush(vgdev, resource_id: bo->hw_res_handle, x, y,
163 width, height, NULL, NULL);
164 virtio_gpu_notify(vgdev);
165 }
166}
167
168static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
169 struct drm_atomic_state *state)
170{
171 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
172 plane);
173 struct drm_device *dev = plane->dev;
174 struct virtio_gpu_device *vgdev = dev->dev_private;
175 struct virtio_gpu_output *output = NULL;
176 struct virtio_gpu_object *bo;
177 struct drm_rect rect;
178
179 if (plane->state->crtc)
180 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
181 if (old_state->crtc)
182 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
183 if (WARN_ON(!output))
184 return;
185
186 if (!plane->state->fb || !output->crtc.state->active) {
187 DRM_DEBUG("nofb\n");
188 virtio_gpu_cmd_set_scanout(vgdev, scanout_id: output->index, resource_id: 0,
189 width: plane->state->src_w >> 16,
190 height: plane->state->src_h >> 16,
191 x: 0, y: 0);
192 virtio_gpu_notify(vgdev);
193 return;
194 }
195
196 if (!drm_atomic_helper_damage_merged(old_state, state: plane->state, rect: &rect))
197 return;
198
199 bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
200 if (bo->dumb)
201 virtio_gpu_update_dumb_bo(vgdev, state: plane->state, rect: &rect);
202
203 if (plane->state->fb != old_state->fb ||
204 plane->state->src_w != old_state->src_w ||
205 plane->state->src_h != old_state->src_h ||
206 plane->state->src_x != old_state->src_x ||
207 plane->state->src_y != old_state->src_y ||
208 output->needs_modeset) {
209 output->needs_modeset = false;
210 DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
211 bo->hw_res_handle,
212 plane->state->crtc_w, plane->state->crtc_h,
213 plane->state->crtc_x, plane->state->crtc_y,
214 plane->state->src_w >> 16,
215 plane->state->src_h >> 16,
216 plane->state->src_x >> 16,
217 plane->state->src_y >> 16);
218
219 if (bo->host3d_blob || bo->guest_blob) {
220 virtio_gpu_cmd_set_scanout_blob
221 (vgdev, scanout_id: output->index, bo,
222 fb: plane->state->fb,
223 width: plane->state->src_w >> 16,
224 height: plane->state->src_h >> 16,
225 x: plane->state->src_x >> 16,
226 y: plane->state->src_y >> 16);
227 } else {
228 virtio_gpu_cmd_set_scanout(vgdev, scanout_id: output->index,
229 resource_id: bo->hw_res_handle,
230 width: plane->state->src_w >> 16,
231 height: plane->state->src_h >> 16,
232 x: plane->state->src_x >> 16,
233 y: plane->state->src_y >> 16);
234 }
235 }
236
237 virtio_gpu_resource_flush(plane,
238 x: rect.x1,
239 y: rect.y1,
240 width: rect.x2 - rect.x1,
241 height: rect.y2 - rect.y1);
242}
243
244static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane,
245 struct drm_plane_state *new_state)
246{
247 struct drm_device *dev = plane->dev;
248 struct virtio_gpu_device *vgdev = dev->dev_private;
249 struct virtio_gpu_framebuffer *vgfb;
250 struct virtio_gpu_object *bo;
251
252 if (!new_state->fb)
253 return 0;
254
255 vgfb = to_virtio_gpu_framebuffer(new_state->fb);
256 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
257 if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob))
258 return 0;
259
260 if (bo->dumb && (plane->state->fb != new_state->fb)) {
261 vgfb->fence = virtio_gpu_fence_alloc(vgdev, base_fence_ctx: vgdev->fence_drv.context,
262 ring_idx: 0);
263 if (!vgfb->fence)
264 return -ENOMEM;
265 }
266
267 return 0;
268}
269
270static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane,
271 struct drm_plane_state *state)
272{
273 struct virtio_gpu_framebuffer *vgfb;
274
275 if (!state->fb)
276 return;
277
278 vgfb = to_virtio_gpu_framebuffer(state->fb);
279 if (vgfb->fence) {
280 dma_fence_put(fence: &vgfb->fence->f);
281 vgfb->fence = NULL;
282 }
283}
284
285static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
286 struct drm_atomic_state *state)
287{
288 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
289 plane);
290 struct drm_device *dev = plane->dev;
291 struct virtio_gpu_device *vgdev = dev->dev_private;
292 struct virtio_gpu_output *output = NULL;
293 struct virtio_gpu_framebuffer *vgfb;
294 struct virtio_gpu_object *bo = NULL;
295 uint32_t handle;
296
297 if (plane->state->crtc)
298 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
299 if (old_state->crtc)
300 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
301 if (WARN_ON(!output))
302 return;
303
304 if (plane->state->fb) {
305 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
306 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
307 handle = bo->hw_res_handle;
308 } else {
309 handle = 0;
310 }
311
312 if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
313 /* new cursor -- update & wait */
314 struct virtio_gpu_object_array *objs;
315
316 objs = virtio_gpu_array_alloc(nents: 1);
317 if (!objs)
318 return;
319 virtio_gpu_array_add_obj(objs, obj: vgfb->base.obj[0]);
320 virtio_gpu_array_lock_resv(objs);
321 virtio_gpu_cmd_transfer_to_host_2d
322 (vgdev, offset: 0,
323 width: plane->state->crtc_w,
324 height: plane->state->crtc_h,
325 x: 0, y: 0, objs, fence: vgfb->fence);
326 virtio_gpu_notify(vgdev);
327 dma_fence_wait(fence: &vgfb->fence->f, intr: true);
328 dma_fence_put(fence: &vgfb->fence->f);
329 vgfb->fence = NULL;
330 }
331
332 if (plane->state->fb != old_state->fb) {
333 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
334 plane->state->crtc_x,
335 plane->state->crtc_y,
336 plane->state->hotspot_x,
337 plane->state->hotspot_y);
338 output->cursor.hdr.type =
339 cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
340 output->cursor.resource_id = cpu_to_le32(handle);
341 if (plane->state->fb) {
342 output->cursor.hot_x =
343 cpu_to_le32(plane->state->hotspot_x);
344 output->cursor.hot_y =
345 cpu_to_le32(plane->state->hotspot_y);
346 } else {
347 output->cursor.hot_x = cpu_to_le32(0);
348 output->cursor.hot_y = cpu_to_le32(0);
349 }
350 } else {
351 DRM_DEBUG("move +%d+%d\n",
352 plane->state->crtc_x,
353 plane->state->crtc_y);
354 output->cursor.hdr.type =
355 cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
356 }
357 output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
358 output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
359 virtio_gpu_cursor_ping(vgdev, output);
360}
361
362static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
363 .prepare_fb = virtio_gpu_plane_prepare_fb,
364 .cleanup_fb = virtio_gpu_plane_cleanup_fb,
365 .atomic_check = virtio_gpu_plane_atomic_check,
366 .atomic_update = virtio_gpu_primary_plane_update,
367};
368
369static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
370 .prepare_fb = virtio_gpu_plane_prepare_fb,
371 .cleanup_fb = virtio_gpu_plane_cleanup_fb,
372 .atomic_check = virtio_gpu_plane_atomic_check,
373 .atomic_update = virtio_gpu_cursor_plane_update,
374};
375
376struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
377 enum drm_plane_type type,
378 int index)
379{
380 struct drm_device *dev = vgdev->ddev;
381 const struct drm_plane_helper_funcs *funcs;
382 struct drm_plane *plane;
383 const uint32_t *formats;
384 int nformats;
385
386 if (type == DRM_PLANE_TYPE_CURSOR) {
387 formats = virtio_gpu_cursor_formats;
388 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
389 funcs = &virtio_gpu_cursor_helper_funcs;
390 } else {
391 formats = virtio_gpu_formats;
392 nformats = ARRAY_SIZE(virtio_gpu_formats);
393 funcs = &virtio_gpu_primary_helper_funcs;
394 }
395
396 plane = drmm_universal_plane_alloc(dev, struct drm_plane, dev,
397 1 << index, &virtio_gpu_plane_funcs,
398 formats, nformats, NULL, type, NULL);
399 if (IS_ERR(ptr: plane))
400 return plane;
401
402 drm_plane_helper_add(plane, funcs);
403
404 if (type == DRM_PLANE_TYPE_PRIMARY)
405 drm_plane_enable_fb_damage_clips(plane);
406
407 return plane;
408}
409

source code of linux/drivers/gpu/drm/virtio/virtgpu_plane.c