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fb1d9738 JB |
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; | |
fb1d9738 JB |
107 | struct ttm_placement *overlay_placement = &vmw_vram_placement; |
108 | int ret; | |
109 | ||
110 | ret = ttm_read_lock(&dev_priv->active_master->lock, interruptible); | |
111 | if (unlikely(ret != 0)) | |
112 | return ret; | |
113 | ||
114 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); | |
115 | if (unlikely(ret != 0)) | |
116 | goto err; | |
117 | ||
fb1d9738 JB |
118 | if (pin) |
119 | overlay_placement = &vmw_vram_ne_placement; | |
120 | ||
121 | ret = ttm_bo_validate(bo, overlay_placement, interruptible, false); | |
122 | ||
123 | ttm_bo_unreserve(bo); | |
124 | ||
125 | err: | |
126 | ttm_read_unlock(&dev_priv->active_master->lock); | |
127 | ||
128 | return ret; | |
129 | } | |
130 | ||
131 | /** | |
132 | * Send put command to hw. | |
133 | * | |
134 | * Returns | |
135 | * -ERESTARTSYS if interrupted by a signal. | |
136 | */ | |
137 | static int vmw_overlay_send_put(struct vmw_private *dev_priv, | |
138 | struct vmw_dma_buffer *buf, | |
139 | struct drm_vmw_control_stream_arg *arg, | |
140 | bool interruptible) | |
141 | { | |
142 | struct { | |
143 | struct vmw_escape_header escape; | |
144 | struct { | |
145 | struct { | |
146 | uint32_t cmdType; | |
147 | uint32_t streamId; | |
148 | } header; | |
149 | struct { | |
150 | uint32_t registerId; | |
151 | uint32_t value; | |
152 | } items[SVGA_VIDEO_PITCH_3 + 1]; | |
153 | } body; | |
154 | struct vmw_escape_video_flush flush; | |
155 | } *cmds; | |
156 | uint32_t offset; | |
157 | int i, ret; | |
158 | ||
159 | for (;;) { | |
160 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); | |
161 | if (cmds) | |
162 | break; | |
163 | ||
164 | ret = vmw_fallback_wait(dev_priv, false, true, 0, | |
165 | interruptible, 3*HZ); | |
166 | if (interruptible && ret == -ERESTARTSYS) | |
167 | return ret; | |
168 | else | |
169 | BUG_ON(ret != 0); | |
170 | } | |
171 | ||
172 | fill_escape(&cmds->escape, sizeof(cmds->body)); | |
173 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | |
174 | cmds->body.header.streamId = arg->stream_id; | |
175 | ||
176 | for (i = 0; i <= SVGA_VIDEO_PITCH_3; i++) | |
177 | cmds->body.items[i].registerId = i; | |
178 | ||
179 | offset = buf->base.offset + arg->offset; | |
180 | ||
181 | cmds->body.items[SVGA_VIDEO_ENABLED].value = true; | |
182 | cmds->body.items[SVGA_VIDEO_FLAGS].value = arg->flags; | |
183 | cmds->body.items[SVGA_VIDEO_DATA_OFFSET].value = offset; | |
184 | cmds->body.items[SVGA_VIDEO_FORMAT].value = arg->format; | |
185 | cmds->body.items[SVGA_VIDEO_COLORKEY].value = arg->color_key; | |
186 | cmds->body.items[SVGA_VIDEO_SIZE].value = arg->size; | |
187 | cmds->body.items[SVGA_VIDEO_WIDTH].value = arg->width; | |
188 | cmds->body.items[SVGA_VIDEO_HEIGHT].value = arg->height; | |
189 | cmds->body.items[SVGA_VIDEO_SRC_X].value = arg->src.x; | |
190 | cmds->body.items[SVGA_VIDEO_SRC_Y].value = arg->src.y; | |
191 | cmds->body.items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w; | |
192 | cmds->body.items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h; | |
193 | cmds->body.items[SVGA_VIDEO_DST_X].value = arg->dst.x; | |
194 | cmds->body.items[SVGA_VIDEO_DST_Y].value = arg->dst.y; | |
195 | cmds->body.items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w; | |
196 | cmds->body.items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h; | |
197 | cmds->body.items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0]; | |
198 | cmds->body.items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1]; | |
199 | cmds->body.items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2]; | |
200 | ||
201 | fill_flush(&cmds->flush, arg->stream_id); | |
202 | ||
203 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | /** | |
209 | * Send stop command to hw. | |
210 | * | |
211 | * Returns | |
212 | * -ERESTARTSYS if interrupted by a signal. | |
213 | */ | |
214 | static int vmw_overlay_send_stop(struct vmw_private *dev_priv, | |
215 | uint32_t stream_id, | |
216 | bool interruptible) | |
217 | { | |
218 | struct { | |
219 | struct vmw_escape_header escape; | |
220 | SVGAEscapeVideoSetRegs body; | |
221 | struct vmw_escape_video_flush flush; | |
222 | } *cmds; | |
223 | int ret; | |
224 | ||
225 | for (;;) { | |
226 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); | |
227 | if (cmds) | |
228 | break; | |
229 | ||
230 | ret = vmw_fallback_wait(dev_priv, false, true, 0, | |
231 | interruptible, 3*HZ); | |
232 | if (interruptible && ret == -ERESTARTSYS) | |
233 | return ret; | |
234 | else | |
235 | BUG_ON(ret != 0); | |
236 | } | |
237 | ||
238 | fill_escape(&cmds->escape, sizeof(cmds->body)); | |
239 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | |
240 | cmds->body.header.streamId = stream_id; | |
241 | cmds->body.items[0].registerId = SVGA_VIDEO_ENABLED; | |
242 | cmds->body.items[0].value = false; | |
243 | fill_flush(&cmds->flush, stream_id); | |
244 | ||
245 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | /** | |
251 | * Stop or pause a stream. | |
252 | * | |
253 | * If the stream is paused the no evict flag is removed from the buffer | |
254 | * but left in vram. This allows for instance mode_set to evict it | |
255 | * should it need to. | |
256 | * | |
257 | * The caller must hold the overlay lock. | |
258 | * | |
259 | * @stream_id which stream to stop/pause. | |
260 | * @pause true to pause, false to stop completely. | |
261 | */ | |
262 | static int vmw_overlay_stop(struct vmw_private *dev_priv, | |
263 | uint32_t stream_id, bool pause, | |
264 | bool interruptible) | |
265 | { | |
266 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
267 | struct vmw_stream *stream = &overlay->stream[stream_id]; | |
268 | int ret; | |
269 | ||
270 | /* no buffer attached the stream is completely stopped */ | |
271 | if (!stream->buf) | |
272 | return 0; | |
273 | ||
274 | /* If the stream is paused this is already done */ | |
275 | if (!stream->paused) { | |
276 | ret = vmw_overlay_send_stop(dev_priv, stream_id, | |
277 | interruptible); | |
278 | if (ret) | |
279 | return ret; | |
280 | ||
281 | /* We just remove the NO_EVICT flag so no -ENOMEM */ | |
282 | ret = vmw_dmabuf_pin_in_vram(dev_priv, stream->buf, false, | |
283 | interruptible); | |
284 | if (interruptible && ret == -ERESTARTSYS) | |
285 | return ret; | |
286 | else | |
287 | BUG_ON(ret != 0); | |
288 | } | |
289 | ||
290 | if (!pause) { | |
291 | vmw_dmabuf_unreference(&stream->buf); | |
292 | stream->paused = false; | |
293 | } else { | |
294 | stream->paused = true; | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | /** | |
301 | * Update a stream and send any put or stop fifo commands needed. | |
302 | * | |
303 | * The caller must hold the overlay lock. | |
304 | * | |
305 | * Returns | |
306 | * -ENOMEM if buffer doesn't fit in vram. | |
307 | * -ERESTARTSYS if interrupted. | |
308 | */ | |
309 | static int vmw_overlay_update_stream(struct vmw_private *dev_priv, | |
310 | struct vmw_dma_buffer *buf, | |
311 | struct drm_vmw_control_stream_arg *arg, | |
312 | bool interruptible) | |
313 | { | |
314 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
315 | struct vmw_stream *stream = &overlay->stream[arg->stream_id]; | |
316 | int ret = 0; | |
317 | ||
318 | if (!buf) | |
319 | return -EINVAL; | |
320 | ||
321 | DRM_DEBUG(" %s: old %p, new %p, %spaused\n", __func__, | |
322 | stream->buf, buf, stream->paused ? "" : "not "); | |
323 | ||
324 | if (stream->buf != buf) { | |
325 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, | |
326 | false, interruptible); | |
327 | if (ret) | |
328 | return ret; | |
329 | } else if (!stream->paused) { | |
330 | /* If the buffers match and not paused then just send | |
331 | * the put command, no need to do anything else. | |
332 | */ | |
333 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | |
334 | if (ret == 0) | |
335 | stream->saved = *arg; | |
336 | else | |
337 | BUG_ON(!interruptible); | |
338 | ||
339 | return ret; | |
340 | } | |
341 | ||
342 | /* We don't start the old stream if we are interrupted. | |
343 | * Might return -ENOMEM if it can't fit the buffer in vram. | |
344 | */ | |
345 | ret = vmw_dmabuf_pin_in_vram(dev_priv, buf, true, interruptible); | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | |
350 | if (ret) { | |
351 | /* This one needs to happen no matter what. We only remove | |
352 | * the NO_EVICT flag so this is safe from -ENOMEM. | |
353 | */ | |
354 | BUG_ON(vmw_dmabuf_pin_in_vram(dev_priv, buf, false, false) != 0); | |
355 | return ret; | |
356 | } | |
357 | ||
358 | if (stream->buf != buf) | |
359 | stream->buf = vmw_dmabuf_reference(buf); | |
360 | stream->saved = *arg; | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | /** | |
366 | * Stop all streams. | |
367 | * | |
368 | * Used by the fb code when starting. | |
369 | * | |
370 | * Takes the overlay lock. | |
371 | */ | |
372 | int vmw_overlay_stop_all(struct vmw_private *dev_priv) | |
373 | { | |
374 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
375 | int i, ret; | |
376 | ||
377 | if (!overlay) | |
378 | return 0; | |
379 | ||
380 | mutex_lock(&overlay->mutex); | |
381 | ||
382 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
383 | struct vmw_stream *stream = &overlay->stream[i]; | |
384 | if (!stream->buf) | |
385 | continue; | |
386 | ||
387 | ret = vmw_overlay_stop(dev_priv, i, false, false); | |
388 | WARN_ON(ret != 0); | |
389 | } | |
390 | ||
391 | mutex_unlock(&overlay->mutex); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | /** | |
397 | * Try to resume all paused streams. | |
398 | * | |
399 | * Used by the kms code after moving a new scanout buffer to vram. | |
400 | * | |
401 | * Takes the overlay lock. | |
402 | */ | |
403 | int vmw_overlay_resume_all(struct vmw_private *dev_priv) | |
404 | { | |
405 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
406 | int i, ret; | |
407 | ||
408 | if (!overlay) | |
409 | return 0; | |
410 | ||
411 | mutex_lock(&overlay->mutex); | |
412 | ||
413 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
414 | struct vmw_stream *stream = &overlay->stream[i]; | |
415 | if (!stream->paused) | |
416 | continue; | |
417 | ||
418 | ret = vmw_overlay_update_stream(dev_priv, stream->buf, | |
419 | &stream->saved, false); | |
420 | if (ret != 0) | |
421 | DRM_INFO("%s: *warning* failed to resume stream %i\n", | |
422 | __func__, i); | |
423 | } | |
424 | ||
425 | mutex_unlock(&overlay->mutex); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | /** | |
431 | * Pauses all active streams. | |
432 | * | |
433 | * Used by the kms code when moving a new scanout buffer to vram. | |
434 | * | |
435 | * Takes the overlay lock. | |
436 | */ | |
437 | int vmw_overlay_pause_all(struct vmw_private *dev_priv) | |
438 | { | |
439 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
440 | int i, ret; | |
441 | ||
442 | if (!overlay) | |
443 | return 0; | |
444 | ||
445 | mutex_lock(&overlay->mutex); | |
446 | ||
447 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
448 | if (overlay->stream[i].paused) | |
449 | DRM_INFO("%s: *warning* stream %i already paused\n", | |
450 | __func__, i); | |
451 | ret = vmw_overlay_stop(dev_priv, i, true, false); | |
452 | WARN_ON(ret != 0); | |
453 | } | |
454 | ||
455 | mutex_unlock(&overlay->mutex); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | int vmw_overlay_ioctl(struct drm_device *dev, void *data, | |
461 | struct drm_file *file_priv) | |
462 | { | |
463 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
464 | struct vmw_private *dev_priv = vmw_priv(dev); | |
465 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
466 | struct drm_vmw_control_stream_arg *arg = | |
467 | (struct drm_vmw_control_stream_arg *)data; | |
468 | struct vmw_dma_buffer *buf; | |
469 | struct vmw_resource *res; | |
470 | int ret; | |
471 | ||
472 | if (!overlay) | |
473 | return -ENOSYS; | |
474 | ||
475 | ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res); | |
476 | if (ret) | |
477 | return ret; | |
478 | ||
479 | mutex_lock(&overlay->mutex); | |
480 | ||
481 | if (!arg->enabled) { | |
482 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true); | |
483 | goto out_unlock; | |
484 | } | |
485 | ||
486 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf); | |
487 | if (ret) | |
488 | goto out_unlock; | |
489 | ||
490 | ret = vmw_overlay_update_stream(dev_priv, buf, arg, true); | |
491 | ||
492 | vmw_dmabuf_unreference(&buf); | |
493 | ||
494 | out_unlock: | |
495 | mutex_unlock(&overlay->mutex); | |
496 | vmw_resource_unreference(&res); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | int vmw_overlay_num_overlays(struct vmw_private *dev_priv) | |
502 | { | |
503 | if (!dev_priv->overlay_priv) | |
504 | return 0; | |
505 | ||
506 | return VMW_MAX_NUM_STREAMS; | |
507 | } | |
508 | ||
509 | int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv) | |
510 | { | |
511 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
512 | int i, k; | |
513 | ||
514 | if (!overlay) | |
515 | return 0; | |
516 | ||
517 | mutex_lock(&overlay->mutex); | |
518 | ||
519 | for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++) | |
520 | if (!overlay->stream[i].claimed) | |
521 | k++; | |
522 | ||
523 | mutex_unlock(&overlay->mutex); | |
524 | ||
525 | return k; | |
526 | } | |
527 | ||
528 | int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out) | |
529 | { | |
530 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
531 | int i; | |
532 | ||
533 | if (!overlay) | |
534 | return -ENOSYS; | |
535 | ||
536 | mutex_lock(&overlay->mutex); | |
537 | ||
538 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
539 | ||
540 | if (overlay->stream[i].claimed) | |
541 | continue; | |
542 | ||
543 | overlay->stream[i].claimed = true; | |
544 | *out = i; | |
545 | mutex_unlock(&overlay->mutex); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | mutex_unlock(&overlay->mutex); | |
550 | return -ESRCH; | |
551 | } | |
552 | ||
553 | int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id) | |
554 | { | |
555 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
556 | ||
557 | BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS); | |
558 | ||
559 | if (!overlay) | |
560 | return -ENOSYS; | |
561 | ||
562 | mutex_lock(&overlay->mutex); | |
563 | ||
564 | WARN_ON(!overlay->stream[stream_id].claimed); | |
565 | vmw_overlay_stop(dev_priv, stream_id, false, false); | |
566 | overlay->stream[stream_id].claimed = false; | |
567 | ||
568 | mutex_unlock(&overlay->mutex); | |
569 | return 0; | |
570 | } | |
571 | ||
572 | int vmw_overlay_init(struct vmw_private *dev_priv) | |
573 | { | |
574 | struct vmw_overlay *overlay; | |
575 | int i; | |
576 | ||
577 | if (dev_priv->overlay_priv) | |
578 | return -EINVAL; | |
579 | ||
580 | if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_VIDEO) && | |
581 | (dev_priv->fifo.capabilities & SVGA_FIFO_CAP_ESCAPE)) { | |
582 | DRM_INFO("hardware doesn't support overlays\n"); | |
583 | return -ENOSYS; | |
584 | } | |
585 | ||
586 | overlay = kmalloc(GFP_KERNEL, sizeof(*overlay)); | |
587 | if (!overlay) | |
588 | return -ENOMEM; | |
589 | ||
590 | memset(overlay, 0, sizeof(*overlay)); | |
591 | mutex_init(&overlay->mutex); | |
592 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
593 | overlay->stream[i].buf = NULL; | |
594 | overlay->stream[i].paused = false; | |
595 | overlay->stream[i].claimed = false; | |
596 | } | |
597 | ||
598 | dev_priv->overlay_priv = overlay; | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | int vmw_overlay_close(struct vmw_private *dev_priv) | |
604 | { | |
605 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
606 | bool forgotten_buffer = false; | |
607 | int i; | |
608 | ||
609 | if (!overlay) | |
610 | return -ENOSYS; | |
611 | ||
612 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
613 | if (overlay->stream[i].buf) { | |
614 | forgotten_buffer = true; | |
615 | vmw_overlay_stop(dev_priv, i, false, false); | |
616 | } | |
617 | } | |
618 | ||
619 | WARN_ON(forgotten_buffer); | |
620 | ||
621 | dev_priv->overlay_priv = NULL; | |
622 | kfree(overlay); | |
623 | ||
624 | return 0; | |
625 | } |