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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; | |
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 | } |