diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c')
-rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c new file mode 100644 index 00000000000..bb6e6a096d2 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c | |||
@@ -0,0 +1,634 @@ | |||
1 | /************************************************************************** | ||
2 | * | ||
3 | * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA | ||
4 | * All Rights Reserved. | ||
5 | * | ||
6 | * Permission is hereby granted, free of charge, to any person obtaining a | ||
7 | * copy of this software and associated documentation files (the | ||
8 | * "Software"), to deal in the Software without restriction, including | ||
9 | * without limitation the rights to use, copy, modify, merge, publish, | ||
10 | * distribute, sub license, and/or sell copies of the Software, and to | ||
11 | * permit persons to whom the Software is furnished to do so, subject to | ||
12 | * the following conditions: | ||
13 | * | ||
14 | * The above copyright notice and this permission notice (including the | ||
15 | * next paragraph) shall be included in all copies or substantial portions | ||
16 | * of the Software. | ||
17 | * | ||
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | ||
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | ||
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | ||
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | ||
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
25 | * | ||
26 | **************************************************************************/ | ||
27 | |||
28 | |||
29 | #include "drmP.h" | ||
30 | #include "vmwgfx_drv.h" | ||
31 | |||
32 | #include "ttm/ttm_placement.h" | ||
33 | |||
34 | #include "svga_overlay.h" | ||
35 | #include "svga_escape.h" | ||
36 | |||
37 | #define VMW_MAX_NUM_STREAMS 1 | ||
38 | |||
39 | struct vmw_stream { | ||
40 | struct vmw_dma_buffer *buf; | ||
41 | bool claimed; | ||
42 | bool paused; | ||
43 | struct drm_vmw_control_stream_arg saved; | ||
44 | }; | ||
45 | |||
46 | /** | ||
47 | * Overlay control | ||
48 | */ | ||
49 | struct vmw_overlay { | ||
50 | /* | ||
51 | * Each stream is a single overlay. In Xv these are called ports. | ||
52 | */ | ||
53 | struct mutex mutex; | ||
54 | struct vmw_stream stream[VMW_MAX_NUM_STREAMS]; | ||
55 | }; | ||
56 | |||
57 | static inline struct vmw_overlay *vmw_overlay(struct drm_device *dev) | ||
58 | { | ||
59 | struct vmw_private *dev_priv = vmw_priv(dev); | ||
60 | return dev_priv ? dev_priv->overlay_priv : NULL; | ||
61 | } | ||
62 | |||
63 | struct vmw_escape_header { | ||
64 | uint32_t cmd; | ||
65 | SVGAFifoCmdEscape body; | ||
66 | }; | ||
67 | |||
68 | struct vmw_escape_video_flush { | ||
69 | struct vmw_escape_header escape; | ||
70 | SVGAEscapeVideoFlush flush; | ||
71 | }; | ||
72 | |||
73 | static inline void fill_escape(struct vmw_escape_header *header, | ||
74 | uint32_t size) | ||
75 | { | ||
76 | header->cmd = SVGA_CMD_ESCAPE; | ||
77 | header->body.nsid = SVGA_ESCAPE_NSID_VMWARE; | ||
78 | header->body.size = size; | ||
79 | } | ||
80 | |||
81 | static inline void fill_flush(struct vmw_escape_video_flush *cmd, | ||
82 | uint32_t stream_id) | ||
83 | { | ||
84 | fill_escape(&cmd->escape, sizeof(cmd->flush)); | ||
85 | cmd->flush.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_FLUSH; | ||
86 | cmd->flush.streamId = stream_id; | ||
87 | } | ||
88 | |||
89 | /** | ||
90 | * Pin or unpin a buffer in vram. | ||
91 | * | ||
92 | * @dev_priv: Driver private. | ||
93 | * @buf: DMA buffer to pin or unpin. | ||
94 | * @pin: Pin buffer in vram if true. | ||
95 | * @interruptible: Use interruptible wait. | ||
96 | * | ||
97 | * Takes the current masters ttm lock in read. | ||
98 | * | ||
99 | * Returns | ||
100 | * -ERESTARTSYS if interrupted by a signal. | ||
101 | */ | ||
102 | static int vmw_dmabuf_pin_in_vram(struct vmw_private *dev_priv, | ||
103 | struct vmw_dma_buffer *buf, | ||
104 | bool pin, bool interruptible) | ||
105 | { | ||
106 | struct ttm_buffer_object *bo = &buf->base; | ||
107 | struct ttm_bo_global *glob = bo->glob; | ||
108 | struct ttm_placement *overlay_placement = &vmw_vram_placement; | ||
109 | int ret; | ||
110 | |||
111 | ret = ttm_read_lock(&dev_priv->active_master->lock, interruptible); | ||
112 | if (unlikely(ret != 0)) | ||
113 | return ret; | ||
114 | |||
115 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); | ||
116 | if (unlikely(ret != 0)) | ||
117 | goto err; | ||
118 | |||
119 | if (buf->gmr_bound) { | ||
120 | vmw_gmr_unbind(dev_priv, buf->gmr_id); | ||
121 | spin_lock(&glob->lru_lock); | ||
122 | ida_remove(&dev_priv->gmr_ida, buf->gmr_id); | ||
123 | spin_unlock(&glob->lru_lock); | ||
124 | buf->gmr_bound = NULL; | ||
125 | } | ||
126 | |||
127 | if (pin) | ||
128 | overlay_placement = &vmw_vram_ne_placement; | ||
129 | |||
130 | ret = ttm_bo_validate(bo, overlay_placement, interruptible, false); | ||
131 | |||
132 | ttm_bo_unreserve(bo); | ||
133 | |||
134 | err: | ||
135 | ttm_read_unlock(&dev_priv->active_master->lock); | ||
136 | |||
137 | return ret; | ||
138 | } | ||
139 | |||
140 | /** | ||
141 | * Send put command to hw. | ||
142 | * | ||
143 | * Returns | ||
144 | * -ERESTARTSYS if interrupted by a signal. | ||
145 | */ | ||
146 | static int vmw_overlay_send_put(struct vmw_private *dev_priv, | ||
147 | struct vmw_dma_buffer *buf, | ||
148 | struct drm_vmw_control_stream_arg *arg, | ||
149 | bool interruptible) | ||
150 | { | ||
151 | struct { | ||
152 | struct vmw_escape_header escape; | ||
153 | struct { | ||
154 | struct { | ||
155 | uint32_t cmdType; | ||
156 | uint32_t streamId; | ||
157 | } header; | ||
158 | struct { | ||
159 | uint32_t registerId; | ||
160 | uint32_t value; | ||
161 | } items[SVGA_VIDEO_PITCH_3 + 1]; | ||
162 | } body; | ||
163 | struct vmw_escape_video_flush flush; | ||
164 | } *cmds; | ||
165 | uint32_t offset; | ||
166 | int i, ret; | ||
167 | |||
168 | for (;;) { | ||
169 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); | ||
170 | if (cmds) | ||
171 | break; | ||
172 | |||
173 | ret = vmw_fallback_wait(dev_priv, false, true, 0, | ||
174 | interruptible, 3*HZ); | ||
175 | if (interruptible && ret == -ERESTARTSYS) | ||
176 | return ret; | ||
177 | else | ||
178 | BUG_ON(ret != 0); | ||
179 | } | ||
180 | |||
181 | fill_escape(&cmds->escape, sizeof(cmds->body)); | ||
182 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | ||
183 | cmds->body.header.streamId = arg->stream_id; | ||
184 | |||
185 | for (i = 0; i <= SVGA_VIDEO_PITCH_3; i++) | ||
186 | cmds->body.items[i].registerId = i; | ||
187 | |||
188 | offset = buf->base.offset + arg->offset; | ||
189 | |||
190 | cmds->body.items[SVGA_VIDEO_ENABLED].value = true; | ||
191 | cmds->body.items[SVGA_VIDEO_FLAGS].value = arg->flags; | ||
192 | cmds->body.items[SVGA_VIDEO_DATA_OFFSET].value = offset; | ||
193 | cmds->body.items[SVGA_VIDEO_FORMAT].value = arg->format; | ||
194 | cmds->body.items[SVGA_VIDEO_COLORKEY].value = arg->color_key; | ||
195 | cmds->body.items[SVGA_VIDEO_SIZE].value = arg->size; | ||
196 | cmds->body.items[SVGA_VIDEO_WIDTH].value = arg->width; | ||
197 | cmds->body.items[SVGA_VIDEO_HEIGHT].value = arg->height; | ||
198 | cmds->body.items[SVGA_VIDEO_SRC_X].value = arg->src.x; | ||
199 | cmds->body.items[SVGA_VIDEO_SRC_Y].value = arg->src.y; | ||
200 | cmds->body.items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w; | ||
201 | cmds->body.items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h; | ||
202 | cmds->body.items[SVGA_VIDEO_DST_X].value = arg->dst.x; | ||
203 | cmds->body.items[SVGA_VIDEO_DST_Y].value = arg->dst.y; | ||
204 | cmds->body.items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w; | ||
205 | cmds->body.items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h; | ||
206 | cmds->body.items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0]; | ||
207 | cmds->body.items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1]; | ||
208 | cmds->body.items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2]; | ||
209 | |||
210 | fill_flush(&cmds->flush, arg->stream_id); | ||
211 | |||
212 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); | ||
213 | |||
214 | return 0; | ||
215 | } | ||
216 | |||
217 | /** | ||
218 | * Send stop command to hw. | ||
219 | * | ||
220 | * Returns | ||
221 | * -ERESTARTSYS if interrupted by a signal. | ||
222 | */ | ||
223 | static int vmw_overlay_send_stop(struct vmw_private *dev_priv, | ||
224 | uint32_t stream_id, | ||
225 | bool interruptible) | ||
226 | { | ||
227 | struct { | ||
228 | struct vmw_escape_header escape; | ||
229 | SVGAEscapeVideoSetRegs body; | ||
230 | struct vmw_escape_video_flush flush; | ||
231 | } *cmds; | ||
232 | int ret; | ||
233 | |||
234 | for (;;) { | ||
235 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); | ||
236 | if (cmds) | ||
237 | break; | ||
238 | |||
239 | ret = vmw_fallback_wait(dev_priv, false, true, 0, | ||
240 | interruptible, 3*HZ); | ||
241 | if (interruptible && ret == -ERESTARTSYS) | ||
242 | return ret; | ||
243 | else | ||
244 | BUG_ON(ret != 0); | ||
245 | } | ||
246 | |||
247 | fill_escape(&cmds->escape, sizeof(cmds->body)); | ||
248 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | ||
249 | cmds->body.header.streamId = stream_id; | ||
250 | cmds->body.items[0].registerId = SVGA_VIDEO_ENABLED; | ||
251 | cmds->body.items[0].value = false; | ||
252 | fill_flush(&cmds->flush, stream_id); | ||
253 | |||
254 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); | ||
255 | |||
256 | return 0; | ||
257 | } | ||
258 | |||
259 | /** | ||
260 | * Stop or pause a stream. | ||
261 | * | ||
262 | * If the stream is paused the no evict flag is removed from the buffer | ||
263 | * but left in vram. This allows for instance mode_set to evict it | ||
264 | * should it need to. | ||
265 | * | ||
266 | * The caller must hold the overlay lock. | ||
267 | * | ||
268 | * @stream_id which stream to stop/pause. | ||
269 | * @pause true to pause, false to stop completely. | ||
270 | */ | ||
271 | static int vmw_overlay_stop(struct vmw_private *dev_priv, | ||
272 | uint32_t stream_id, bool pause, | ||
273 | bool interruptible) | ||
274 | { | ||
275 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
276 | struct vmw_stream *stream = &overlay->stream[stream_id]; | ||
277 | int ret; | ||
278 | |||
279 | /* no buffer attached the stream is completely stopped */ | ||
280 | if (!stream->buf) | ||
281 | return 0; | ||
282 | |||
283 | /* If the stream is paused this is already done */ | ||
284 | if (!stream->paused) { | ||
285 | ret = vmw_overlay_send_stop(dev_priv, stream_id, | ||
286 | interruptible); | ||
287 | if (ret) | ||
288 | return ret; | ||
289 | |||
290 | /* We just remove the NO_EVICT flag so no -ENOMEM */ | ||
291 | ret = vmw_dmabuf_pin_in_vram(dev_priv, stream->buf, false, | ||
292 | interruptible); | ||
293 | if (interruptible && ret == -ERESTARTSYS) | ||
294 | return ret; | ||
295 | else | ||
296 | BUG_ON(ret != 0); | ||
297 | } | ||
298 | |||
299 | if (!pause) { | ||
300 | vmw_dmabuf_unreference(&stream->buf); | ||
301 | stream->paused = false; | ||
302 | } else { | ||
303 | stream->paused = true; | ||
304 | } | ||
305 | |||
306 | return 0; | ||
307 | } | ||
308 | |||
309 | /** | ||
310 | * Update a stream and send any put or stop fifo commands needed. | ||
311 | * | ||
312 | * The caller must hold the overlay lock. | ||
313 | * | ||
314 | * Returns | ||
315 | * -ENOMEM if buffer doesn't fit in vram. | ||
316 | * -ERESTARTSYS if interrupted. | ||
317 | */ | ||
318 | static int vmw_overlay_update_stream(struct vmw_private *dev_priv, | ||
319 | struct vmw_dma_buffer *buf, | ||
320 | struct drm_vmw_control_stream_arg *arg, | ||
321 | bool interruptible) | ||
322 | { | ||
323 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
324 | struct vmw_stream *stream = &overlay->stream[arg->stream_id]; | ||
325 | int ret = 0; | ||
326 | |||
327 | if (!buf) | ||
328 | return -EINVAL; | ||
329 | |||
330 | DRM_DEBUG(" %s: old %p, new %p, %spaused\n", __func__, | ||
331 | stream->buf, buf, stream->paused ? "" : "not "); | ||
332 | |||
333 | if (stream->buf != buf) { | ||
334 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, | ||
335 | false, interruptible); | ||
336 | if (ret) | ||
337 | return ret; | ||
338 | } else if (!stream->paused) { | ||
339 | /* If the buffers match and not paused then just send | ||
340 | * the put command, no need to do anything else. | ||
341 | */ | ||
342 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | ||
343 | if (ret == 0) | ||
344 | stream->saved = *arg; | ||
345 | else | ||
346 | BUG_ON(!interruptible); | ||
347 | |||
348 | return ret; | ||
349 | } | ||
350 | |||
351 | /* We don't start the old stream if we are interrupted. | ||
352 | * Might return -ENOMEM if it can't fit the buffer in vram. | ||
353 | */ | ||
354 | ret = vmw_dmabuf_pin_in_vram(dev_priv, buf, true, interruptible); | ||
355 | if (ret) | ||
356 | return ret; | ||
357 | |||
358 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | ||
359 | if (ret) { | ||
360 | /* This one needs to happen no matter what. We only remove | ||
361 | * the NO_EVICT flag so this is safe from -ENOMEM. | ||
362 | */ | ||
363 | BUG_ON(vmw_dmabuf_pin_in_vram(dev_priv, buf, false, false) != 0); | ||
364 | return ret; | ||
365 | } | ||
366 | |||
367 | if (stream->buf != buf) | ||
368 | stream->buf = vmw_dmabuf_reference(buf); | ||
369 | stream->saved = *arg; | ||
370 | |||
371 | return 0; | ||
372 | } | ||
373 | |||
374 | /** | ||
375 | * Stop all streams. | ||
376 | * | ||
377 | * Used by the fb code when starting. | ||
378 | * | ||
379 | * Takes the overlay lock. | ||
380 | */ | ||
381 | int vmw_overlay_stop_all(struct vmw_private *dev_priv) | ||
382 | { | ||
383 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
384 | int i, ret; | ||
385 | |||
386 | if (!overlay) | ||
387 | return 0; | ||
388 | |||
389 | mutex_lock(&overlay->mutex); | ||
390 | |||
391 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
392 | struct vmw_stream *stream = &overlay->stream[i]; | ||
393 | if (!stream->buf) | ||
394 | continue; | ||
395 | |||
396 | ret = vmw_overlay_stop(dev_priv, i, false, false); | ||
397 | WARN_ON(ret != 0); | ||
398 | } | ||
399 | |||
400 | mutex_unlock(&overlay->mutex); | ||
401 | |||
402 | return 0; | ||
403 | } | ||
404 | |||
405 | /** | ||
406 | * Try to resume all paused streams. | ||
407 | * | ||
408 | * Used by the kms code after moving a new scanout buffer to vram. | ||
409 | * | ||
410 | * Takes the overlay lock. | ||
411 | */ | ||
412 | int vmw_overlay_resume_all(struct vmw_private *dev_priv) | ||
413 | { | ||
414 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
415 | int i, ret; | ||
416 | |||
417 | if (!overlay) | ||
418 | return 0; | ||
419 | |||
420 | mutex_lock(&overlay->mutex); | ||
421 | |||
422 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
423 | struct vmw_stream *stream = &overlay->stream[i]; | ||
424 | if (!stream->paused) | ||
425 | continue; | ||
426 | |||
427 | ret = vmw_overlay_update_stream(dev_priv, stream->buf, | ||
428 | &stream->saved, false); | ||
429 | if (ret != 0) | ||
430 | DRM_INFO("%s: *warning* failed to resume stream %i\n", | ||
431 | __func__, i); | ||
432 | } | ||
433 | |||
434 | mutex_unlock(&overlay->mutex); | ||
435 | |||
436 | return 0; | ||
437 | } | ||
438 | |||
439 | /** | ||
440 | * Pauses all active streams. | ||
441 | * | ||
442 | * Used by the kms code when moving a new scanout buffer to vram. | ||
443 | * | ||
444 | * Takes the overlay lock. | ||
445 | */ | ||
446 | int vmw_overlay_pause_all(struct vmw_private *dev_priv) | ||
447 | { | ||
448 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
449 | int i, ret; | ||
450 | |||
451 | if (!overlay) | ||
452 | return 0; | ||
453 | |||
454 | mutex_lock(&overlay->mutex); | ||
455 | |||
456 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
457 | if (overlay->stream[i].paused) | ||
458 | DRM_INFO("%s: *warning* stream %i already paused\n", | ||
459 | __func__, i); | ||
460 | ret = vmw_overlay_stop(dev_priv, i, true, false); | ||
461 | WARN_ON(ret != 0); | ||
462 | } | ||
463 | |||
464 | mutex_unlock(&overlay->mutex); | ||
465 | |||
466 | return 0; | ||
467 | } | ||
468 | |||
469 | int vmw_overlay_ioctl(struct drm_device *dev, void *data, | ||
470 | struct drm_file *file_priv) | ||
471 | { | ||
472 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | ||
473 | struct vmw_private *dev_priv = vmw_priv(dev); | ||
474 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
475 | struct drm_vmw_control_stream_arg *arg = | ||
476 | (struct drm_vmw_control_stream_arg *)data; | ||
477 | struct vmw_dma_buffer *buf; | ||
478 | struct vmw_resource *res; | ||
479 | int ret; | ||
480 | |||
481 | if (!overlay) | ||
482 | return -ENOSYS; | ||
483 | |||
484 | ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res); | ||
485 | if (ret) | ||
486 | return ret; | ||
487 | |||
488 | mutex_lock(&overlay->mutex); | ||
489 | |||
490 | if (!arg->enabled) { | ||
491 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true); | ||
492 | goto out_unlock; | ||
493 | } | ||
494 | |||
495 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf); | ||
496 | if (ret) | ||
497 | goto out_unlock; | ||
498 | |||
499 | ret = vmw_overlay_update_stream(dev_priv, buf, arg, true); | ||
500 | |||
501 | vmw_dmabuf_unreference(&buf); | ||
502 | |||
503 | out_unlock: | ||
504 | mutex_unlock(&overlay->mutex); | ||
505 | vmw_resource_unreference(&res); | ||
506 | |||
507 | return ret; | ||
508 | } | ||
509 | |||
510 | int vmw_overlay_num_overlays(struct vmw_private *dev_priv) | ||
511 | { | ||
512 | if (!dev_priv->overlay_priv) | ||
513 | return 0; | ||
514 | |||
515 | return VMW_MAX_NUM_STREAMS; | ||
516 | } | ||
517 | |||
518 | int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv) | ||
519 | { | ||
520 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
521 | int i, k; | ||
522 | |||
523 | if (!overlay) | ||
524 | return 0; | ||
525 | |||
526 | mutex_lock(&overlay->mutex); | ||
527 | |||
528 | for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++) | ||
529 | if (!overlay->stream[i].claimed) | ||
530 | k++; | ||
531 | |||
532 | mutex_unlock(&overlay->mutex); | ||
533 | |||
534 | return k; | ||
535 | } | ||
536 | |||
537 | int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out) | ||
538 | { | ||
539 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
540 | int i; | ||
541 | |||
542 | if (!overlay) | ||
543 | return -ENOSYS; | ||
544 | |||
545 | mutex_lock(&overlay->mutex); | ||
546 | |||
547 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
548 | |||
549 | if (overlay->stream[i].claimed) | ||
550 | continue; | ||
551 | |||
552 | overlay->stream[i].claimed = true; | ||
553 | *out = i; | ||
554 | mutex_unlock(&overlay->mutex); | ||
555 | return 0; | ||
556 | } | ||
557 | |||
558 | mutex_unlock(&overlay->mutex); | ||
559 | return -ESRCH; | ||
560 | } | ||
561 | |||
562 | int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id) | ||
563 | { | ||
564 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
565 | |||
566 | BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS); | ||
567 | |||
568 | if (!overlay) | ||
569 | return -ENOSYS; | ||
570 | |||
571 | mutex_lock(&overlay->mutex); | ||
572 | |||
573 | WARN_ON(!overlay->stream[stream_id].claimed); | ||
574 | vmw_overlay_stop(dev_priv, stream_id, false, false); | ||
575 | overlay->stream[stream_id].claimed = false; | ||
576 | |||
577 | mutex_unlock(&overlay->mutex); | ||
578 | return 0; | ||
579 | } | ||
580 | |||
581 | int vmw_overlay_init(struct vmw_private *dev_priv) | ||
582 | { | ||
583 | struct vmw_overlay *overlay; | ||
584 | int i; | ||
585 | |||
586 | if (dev_priv->overlay_priv) | ||
587 | return -EINVAL; | ||
588 | |||
589 | if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_VIDEO) && | ||
590 | (dev_priv->fifo.capabilities & SVGA_FIFO_CAP_ESCAPE)) { | ||
591 | DRM_INFO("hardware doesn't support overlays\n"); | ||
592 | return -ENOSYS; | ||
593 | } | ||
594 | |||
595 | overlay = kmalloc(GFP_KERNEL, sizeof(*overlay)); | ||
596 | if (!overlay) | ||
597 | return -ENOMEM; | ||
598 | |||
599 | memset(overlay, 0, sizeof(*overlay)); | ||
600 | mutex_init(&overlay->mutex); | ||
601 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
602 | overlay->stream[i].buf = NULL; | ||
603 | overlay->stream[i].paused = false; | ||
604 | overlay->stream[i].claimed = false; | ||
605 | } | ||
606 | |||
607 | dev_priv->overlay_priv = overlay; | ||
608 | |||
609 | return 0; | ||
610 | } | ||
611 | |||
612 | int vmw_overlay_close(struct vmw_private *dev_priv) | ||
613 | { | ||
614 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | ||
615 | bool forgotten_buffer = false; | ||
616 | int i; | ||
617 | |||
618 | if (!overlay) | ||
619 | return -ENOSYS; | ||
620 | |||
621 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | ||
622 | if (overlay->stream[i].buf) { | ||
623 | forgotten_buffer = true; | ||
624 | vmw_overlay_stop(dev_priv, i, false, false); | ||
625 | } | ||
626 | } | ||
627 | |||
628 | WARN_ON(forgotten_buffer); | ||
629 | |||
630 | dev_priv->overlay_priv = NULL; | ||
631 | kfree(overlay); | ||
632 | |||
633 | return 0; | ||
634 | } | ||