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dff96888 | 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
fb1d9738 JB |
2 | /************************************************************************** |
3 | * | |
dff96888 | 4 | * Copyright 2009-2014 VMware, Inc., Palo Alto, CA., USA |
fb1d9738 JB |
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 | ||
760285e7 | 29 | #include <drm/drmP.h> |
fb1d9738 JB |
30 | #include "vmwgfx_drv.h" |
31 | ||
760285e7 | 32 | #include <drm/ttm/ttm_placement.h> |
fb1d9738 | 33 | |
8ce75f8a SY |
34 | #include "device_include/svga_overlay.h" |
35 | #include "device_include/svga_escape.h" | |
fb1d9738 JB |
36 | |
37 | #define VMW_MAX_NUM_STREAMS 1 | |
dcb52271 | 38 | #define VMW_OVERLAY_CAP_MASK (SVGA_FIFO_CAP_VIDEO | SVGA_FIFO_CAP_ESCAPE) |
fb1d9738 JB |
39 | |
40 | struct vmw_stream { | |
f1d34bfd | 41 | struct vmw_buffer_object *buf; |
fb1d9738 JB |
42 | bool claimed; |
43 | bool paused; | |
44 | struct drm_vmw_control_stream_arg saved; | |
45 | }; | |
46 | ||
47 | /** | |
48 | * Overlay control | |
49 | */ | |
50 | struct vmw_overlay { | |
51 | /* | |
52 | * Each stream is a single overlay. In Xv these are called ports. | |
53 | */ | |
54 | struct mutex mutex; | |
55 | struct vmw_stream stream[VMW_MAX_NUM_STREAMS]; | |
56 | }; | |
57 | ||
58 | static inline struct vmw_overlay *vmw_overlay(struct drm_device *dev) | |
59 | { | |
60 | struct vmw_private *dev_priv = vmw_priv(dev); | |
61 | return dev_priv ? dev_priv->overlay_priv : NULL; | |
62 | } | |
63 | ||
64 | struct vmw_escape_header { | |
65 | uint32_t cmd; | |
66 | SVGAFifoCmdEscape body; | |
67 | }; | |
68 | ||
69 | struct vmw_escape_video_flush { | |
70 | struct vmw_escape_header escape; | |
71 | SVGAEscapeVideoFlush flush; | |
72 | }; | |
73 | ||
74 | static inline void fill_escape(struct vmw_escape_header *header, | |
75 | uint32_t size) | |
76 | { | |
77 | header->cmd = SVGA_CMD_ESCAPE; | |
78 | header->body.nsid = SVGA_ESCAPE_NSID_VMWARE; | |
79 | header->body.size = size; | |
80 | } | |
81 | ||
82 | static inline void fill_flush(struct vmw_escape_video_flush *cmd, | |
83 | uint32_t stream_id) | |
84 | { | |
85 | fill_escape(&cmd->escape, sizeof(cmd->flush)); | |
86 | cmd->flush.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_FLUSH; | |
87 | cmd->flush.streamId = stream_id; | |
88 | } | |
89 | ||
fb1d9738 JB |
90 | /** |
91 | * Send put command to hw. | |
92 | * | |
93 | * Returns | |
94 | * -ERESTARTSYS if interrupted by a signal. | |
95 | */ | |
96 | static int vmw_overlay_send_put(struct vmw_private *dev_priv, | |
f1d34bfd | 97 | struct vmw_buffer_object *buf, |
fb1d9738 JB |
98 | struct drm_vmw_control_stream_arg *arg, |
99 | bool interruptible) | |
100 | { | |
44031d25 JB |
101 | struct vmw_escape_video_flush *flush; |
102 | size_t fifo_size; | |
c8261a96 | 103 | bool have_so = (dev_priv->active_display_unit == vmw_du_screen_object); |
44031d25 | 104 | int i, num_items; |
b37a6b9a | 105 | SVGAGuestPtr ptr; |
44031d25 | 106 | |
fb1d9738 JB |
107 | struct { |
108 | struct vmw_escape_header escape; | |
109 | struct { | |
44031d25 JB |
110 | uint32_t cmdType; |
111 | uint32_t streamId; | |
112 | } header; | |
fb1d9738 | 113 | } *cmds; |
44031d25 JB |
114 | struct { |
115 | uint32_t registerId; | |
116 | uint32_t value; | |
117 | } *items; | |
fb1d9738 | 118 | |
44031d25 JB |
119 | /* defines are a index needs + 1 */ |
120 | if (have_so) | |
121 | num_items = SVGA_VIDEO_DST_SCREEN_ID + 1; | |
122 | else | |
123 | num_items = SVGA_VIDEO_PITCH_3 + 1; | |
124 | ||
125 | fifo_size = sizeof(*cmds) + sizeof(*flush) + sizeof(*items) * num_items; | |
126 | ||
11c45419 | 127 | cmds = VMW_FIFO_RESERVE(dev_priv, fifo_size); |
44031d25 JB |
128 | /* hardware has hung, can't do anything here */ |
129 | if (!cmds) | |
130 | return -ENOMEM; | |
131 | ||
132 | items = (typeof(items))&cmds[1]; | |
133 | flush = (struct vmw_escape_video_flush *)&items[num_items]; | |
134 | ||
135 | /* the size is header + number of items */ | |
136 | fill_escape(&cmds->escape, sizeof(*items) * (num_items + 1)); | |
137 | ||
138 | cmds->header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | |
139 | cmds->header.streamId = arg->stream_id; | |
140 | ||
141 | /* the IDs are neatly numbered */ | |
142 | for (i = 0; i < num_items; i++) | |
143 | items[i].registerId = i; | |
144 | ||
b37a6b9a TH |
145 | vmw_bo_get_guest_ptr(&buf->base, &ptr); |
146 | ptr.offset += arg->offset; | |
44031d25 JB |
147 | |
148 | items[SVGA_VIDEO_ENABLED].value = true; | |
149 | items[SVGA_VIDEO_FLAGS].value = arg->flags; | |
b37a6b9a | 150 | items[SVGA_VIDEO_DATA_OFFSET].value = ptr.offset; |
44031d25 JB |
151 | items[SVGA_VIDEO_FORMAT].value = arg->format; |
152 | items[SVGA_VIDEO_COLORKEY].value = arg->color_key; | |
153 | items[SVGA_VIDEO_SIZE].value = arg->size; | |
154 | items[SVGA_VIDEO_WIDTH].value = arg->width; | |
155 | items[SVGA_VIDEO_HEIGHT].value = arg->height; | |
156 | items[SVGA_VIDEO_SRC_X].value = arg->src.x; | |
157 | items[SVGA_VIDEO_SRC_Y].value = arg->src.y; | |
158 | items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w; | |
159 | items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h; | |
160 | items[SVGA_VIDEO_DST_X].value = arg->dst.x; | |
161 | items[SVGA_VIDEO_DST_Y].value = arg->dst.y; | |
162 | items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w; | |
163 | items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h; | |
164 | items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0]; | |
165 | items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1]; | |
166 | items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2]; | |
167 | if (have_so) { | |
b37a6b9a | 168 | items[SVGA_VIDEO_DATA_GMRID].value = ptr.gmrId; |
44031d25 | 169 | items[SVGA_VIDEO_DST_SCREEN_ID].value = SVGA_ID_INVALID; |
fb1d9738 JB |
170 | } |
171 | ||
44031d25 | 172 | fill_flush(flush, arg->stream_id); |
fb1d9738 | 173 | |
44031d25 | 174 | vmw_fifo_commit(dev_priv, fifo_size); |
fb1d9738 JB |
175 | |
176 | return 0; | |
177 | } | |
178 | ||
179 | /** | |
180 | * Send stop command to hw. | |
181 | * | |
182 | * Returns | |
183 | * -ERESTARTSYS if interrupted by a signal. | |
184 | */ | |
185 | static int vmw_overlay_send_stop(struct vmw_private *dev_priv, | |
186 | uint32_t stream_id, | |
187 | bool interruptible) | |
188 | { | |
189 | struct { | |
190 | struct vmw_escape_header escape; | |
191 | SVGAEscapeVideoSetRegs body; | |
192 | struct vmw_escape_video_flush flush; | |
193 | } *cmds; | |
194 | int ret; | |
195 | ||
196 | for (;;) { | |
11c45419 | 197 | cmds = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmds)); |
fb1d9738 JB |
198 | if (cmds) |
199 | break; | |
200 | ||
201 | ret = vmw_fallback_wait(dev_priv, false, true, 0, | |
202 | interruptible, 3*HZ); | |
203 | if (interruptible && ret == -ERESTARTSYS) | |
204 | return ret; | |
205 | else | |
206 | BUG_ON(ret != 0); | |
207 | } | |
208 | ||
209 | fill_escape(&cmds->escape, sizeof(cmds->body)); | |
210 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; | |
211 | cmds->body.header.streamId = stream_id; | |
212 | cmds->body.items[0].registerId = SVGA_VIDEO_ENABLED; | |
213 | cmds->body.items[0].value = false; | |
214 | fill_flush(&cmds->flush, stream_id); | |
215 | ||
216 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
d991ef03 | 221 | /** |
44031d25 | 222 | * Move a buffer to vram or gmr if @pin is set, else unpin the buffer. |
d991ef03 | 223 | * |
44031d25 JB |
224 | * With the introduction of screen objects buffers could now be |
225 | * used with GMRs instead of being locked to vram. | |
d991ef03 JB |
226 | */ |
227 | static int vmw_overlay_move_buffer(struct vmw_private *dev_priv, | |
f1d34bfd | 228 | struct vmw_buffer_object *buf, |
d991ef03 JB |
229 | bool pin, bool inter) |
230 | { | |
44031d25 | 231 | if (!pin) |
f1d34bfd | 232 | return vmw_bo_unpin(dev_priv, buf, inter); |
44031d25 | 233 | |
c8261a96 | 234 | if (dev_priv->active_display_unit == vmw_du_legacy) |
f1d34bfd | 235 | return vmw_bo_pin_in_vram(dev_priv, buf, inter); |
44031d25 | 236 | |
f1d34bfd | 237 | return vmw_bo_pin_in_vram_or_gmr(dev_priv, buf, inter); |
d991ef03 JB |
238 | } |
239 | ||
fb1d9738 JB |
240 | /** |
241 | * Stop or pause a stream. | |
242 | * | |
243 | * If the stream is paused the no evict flag is removed from the buffer | |
244 | * but left in vram. This allows for instance mode_set to evict it | |
245 | * should it need to. | |
246 | * | |
247 | * The caller must hold the overlay lock. | |
248 | * | |
249 | * @stream_id which stream to stop/pause. | |
250 | * @pause true to pause, false to stop completely. | |
251 | */ | |
252 | static int vmw_overlay_stop(struct vmw_private *dev_priv, | |
253 | uint32_t stream_id, bool pause, | |
254 | bool interruptible) | |
255 | { | |
256 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
257 | struct vmw_stream *stream = &overlay->stream[stream_id]; | |
258 | int ret; | |
259 | ||
260 | /* no buffer attached the stream is completely stopped */ | |
261 | if (!stream->buf) | |
262 | return 0; | |
263 | ||
264 | /* If the stream is paused this is already done */ | |
265 | if (!stream->paused) { | |
266 | ret = vmw_overlay_send_stop(dev_priv, stream_id, | |
267 | interruptible); | |
268 | if (ret) | |
269 | return ret; | |
270 | ||
271 | /* We just remove the NO_EVICT flag so no -ENOMEM */ | |
d991ef03 JB |
272 | ret = vmw_overlay_move_buffer(dev_priv, stream->buf, false, |
273 | interruptible); | |
fb1d9738 JB |
274 | if (interruptible && ret == -ERESTARTSYS) |
275 | return ret; | |
276 | else | |
277 | BUG_ON(ret != 0); | |
278 | } | |
279 | ||
280 | if (!pause) { | |
f1d34bfd | 281 | vmw_bo_unreference(&stream->buf); |
fb1d9738 JB |
282 | stream->paused = false; |
283 | } else { | |
284 | stream->paused = true; | |
285 | } | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | /** | |
291 | * Update a stream and send any put or stop fifo commands needed. | |
292 | * | |
293 | * The caller must hold the overlay lock. | |
294 | * | |
295 | * Returns | |
296 | * -ENOMEM if buffer doesn't fit in vram. | |
297 | * -ERESTARTSYS if interrupted. | |
298 | */ | |
299 | static int vmw_overlay_update_stream(struct vmw_private *dev_priv, | |
f1d34bfd | 300 | struct vmw_buffer_object *buf, |
fb1d9738 JB |
301 | struct drm_vmw_control_stream_arg *arg, |
302 | bool interruptible) | |
303 | { | |
304 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
305 | struct vmw_stream *stream = &overlay->stream[arg->stream_id]; | |
306 | int ret = 0; | |
307 | ||
308 | if (!buf) | |
309 | return -EINVAL; | |
310 | ||
311 | DRM_DEBUG(" %s: old %p, new %p, %spaused\n", __func__, | |
312 | stream->buf, buf, stream->paused ? "" : "not "); | |
313 | ||
314 | if (stream->buf != buf) { | |
315 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, | |
316 | false, interruptible); | |
317 | if (ret) | |
318 | return ret; | |
319 | } else if (!stream->paused) { | |
320 | /* If the buffers match and not paused then just send | |
321 | * the put command, no need to do anything else. | |
322 | */ | |
323 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | |
324 | if (ret == 0) | |
325 | stream->saved = *arg; | |
326 | else | |
327 | BUG_ON(!interruptible); | |
328 | ||
329 | return ret; | |
330 | } | |
331 | ||
332 | /* We don't start the old stream if we are interrupted. | |
333 | * Might return -ENOMEM if it can't fit the buffer in vram. | |
334 | */ | |
d991ef03 | 335 | ret = vmw_overlay_move_buffer(dev_priv, buf, true, interruptible); |
fb1d9738 JB |
336 | if (ret) |
337 | return ret; | |
338 | ||
339 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); | |
340 | if (ret) { | |
341 | /* This one needs to happen no matter what. We only remove | |
342 | * the NO_EVICT flag so this is safe from -ENOMEM. | |
343 | */ | |
d991ef03 JB |
344 | BUG_ON(vmw_overlay_move_buffer(dev_priv, buf, false, false) |
345 | != 0); | |
fb1d9738 JB |
346 | return ret; |
347 | } | |
348 | ||
349 | if (stream->buf != buf) | |
f1d34bfd | 350 | stream->buf = vmw_bo_reference(buf); |
fb1d9738 | 351 | stream->saved = *arg; |
792778e8 JB |
352 | /* stream is no longer stopped/paused */ |
353 | stream->paused = false; | |
fb1d9738 JB |
354 | |
355 | return 0; | |
356 | } | |
357 | ||
358 | /** | |
359 | * Stop all streams. | |
360 | * | |
361 | * Used by the fb code when starting. | |
362 | * | |
363 | * Takes the overlay lock. | |
364 | */ | |
365 | int vmw_overlay_stop_all(struct vmw_private *dev_priv) | |
366 | { | |
367 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
368 | int i, ret; | |
369 | ||
370 | if (!overlay) | |
371 | return 0; | |
372 | ||
373 | mutex_lock(&overlay->mutex); | |
374 | ||
375 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
376 | struct vmw_stream *stream = &overlay->stream[i]; | |
377 | if (!stream->buf) | |
378 | continue; | |
379 | ||
380 | ret = vmw_overlay_stop(dev_priv, i, false, false); | |
381 | WARN_ON(ret != 0); | |
382 | } | |
383 | ||
384 | mutex_unlock(&overlay->mutex); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | /** | |
390 | * Try to resume all paused streams. | |
391 | * | |
392 | * Used by the kms code after moving a new scanout buffer to vram. | |
393 | * | |
394 | * Takes the overlay lock. | |
395 | */ | |
396 | int vmw_overlay_resume_all(struct vmw_private *dev_priv) | |
397 | { | |
398 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
399 | int i, ret; | |
400 | ||
401 | if (!overlay) | |
402 | return 0; | |
403 | ||
404 | mutex_lock(&overlay->mutex); | |
405 | ||
406 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
407 | struct vmw_stream *stream = &overlay->stream[i]; | |
408 | if (!stream->paused) | |
409 | continue; | |
410 | ||
411 | ret = vmw_overlay_update_stream(dev_priv, stream->buf, | |
412 | &stream->saved, false); | |
413 | if (ret != 0) | |
414 | DRM_INFO("%s: *warning* failed to resume stream %i\n", | |
415 | __func__, i); | |
416 | } | |
417 | ||
418 | mutex_unlock(&overlay->mutex); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | /** | |
424 | * Pauses all active streams. | |
425 | * | |
426 | * Used by the kms code when moving a new scanout buffer to vram. | |
427 | * | |
428 | * Takes the overlay lock. | |
429 | */ | |
430 | int vmw_overlay_pause_all(struct vmw_private *dev_priv) | |
431 | { | |
432 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
433 | int i, ret; | |
434 | ||
435 | if (!overlay) | |
436 | return 0; | |
437 | ||
438 | mutex_lock(&overlay->mutex); | |
439 | ||
440 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
441 | if (overlay->stream[i].paused) | |
442 | DRM_INFO("%s: *warning* stream %i already paused\n", | |
443 | __func__, i); | |
444 | ret = vmw_overlay_stop(dev_priv, i, true, false); | |
445 | WARN_ON(ret != 0); | |
446 | } | |
447 | ||
448 | mutex_unlock(&overlay->mutex); | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
dcb52271 TH |
453 | |
454 | static bool vmw_overlay_available(const struct vmw_private *dev_priv) | |
455 | { | |
c8261a96 | 456 | return (dev_priv->overlay_priv != NULL && |
dcb52271 TH |
457 | ((dev_priv->fifo.capabilities & VMW_OVERLAY_CAP_MASK) == |
458 | VMW_OVERLAY_CAP_MASK)); | |
459 | } | |
460 | ||
fb1d9738 JB |
461 | int vmw_overlay_ioctl(struct drm_device *dev, void *data, |
462 | struct drm_file *file_priv) | |
463 | { | |
464 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
465 | struct vmw_private *dev_priv = vmw_priv(dev); | |
466 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
467 | struct drm_vmw_control_stream_arg *arg = | |
468 | (struct drm_vmw_control_stream_arg *)data; | |
f1d34bfd | 469 | struct vmw_buffer_object *buf; |
fb1d9738 JB |
470 | struct vmw_resource *res; |
471 | int ret; | |
472 | ||
dcb52271 | 473 | if (!vmw_overlay_available(dev_priv)) |
fb1d9738 JB |
474 | return -ENOSYS; |
475 | ||
476 | ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res); | |
477 | if (ret) | |
478 | return ret; | |
479 | ||
480 | mutex_lock(&overlay->mutex); | |
481 | ||
482 | if (!arg->enabled) { | |
483 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true); | |
484 | goto out_unlock; | |
485 | } | |
486 | ||
f1d34bfd | 487 | ret = vmw_user_bo_lookup(tfile, arg->handle, &buf, NULL); |
fb1d9738 JB |
488 | if (ret) |
489 | goto out_unlock; | |
490 | ||
491 | ret = vmw_overlay_update_stream(dev_priv, buf, arg, true); | |
492 | ||
f1d34bfd | 493 | vmw_bo_unreference(&buf); |
fb1d9738 JB |
494 | |
495 | out_unlock: | |
496 | mutex_unlock(&overlay->mutex); | |
497 | vmw_resource_unreference(&res); | |
498 | ||
499 | return ret; | |
500 | } | |
501 | ||
502 | int vmw_overlay_num_overlays(struct vmw_private *dev_priv) | |
503 | { | |
dcb52271 | 504 | if (!vmw_overlay_available(dev_priv)) |
fb1d9738 JB |
505 | return 0; |
506 | ||
507 | return VMW_MAX_NUM_STREAMS; | |
508 | } | |
509 | ||
510 | int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv) | |
511 | { | |
512 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
513 | int i, k; | |
514 | ||
dcb52271 | 515 | if (!vmw_overlay_available(dev_priv)) |
fb1d9738 JB |
516 | return 0; |
517 | ||
518 | mutex_lock(&overlay->mutex); | |
519 | ||
520 | for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++) | |
521 | if (!overlay->stream[i].claimed) | |
522 | k++; | |
523 | ||
524 | mutex_unlock(&overlay->mutex); | |
525 | ||
526 | return k; | |
527 | } | |
528 | ||
529 | int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out) | |
530 | { | |
531 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
532 | int i; | |
533 | ||
534 | if (!overlay) | |
535 | return -ENOSYS; | |
536 | ||
537 | mutex_lock(&overlay->mutex); | |
538 | ||
539 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
540 | ||
541 | if (overlay->stream[i].claimed) | |
542 | continue; | |
543 | ||
544 | overlay->stream[i].claimed = true; | |
545 | *out = i; | |
546 | mutex_unlock(&overlay->mutex); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | mutex_unlock(&overlay->mutex); | |
551 | return -ESRCH; | |
552 | } | |
553 | ||
554 | int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id) | |
555 | { | |
556 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
557 | ||
558 | BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS); | |
559 | ||
560 | if (!overlay) | |
561 | return -ENOSYS; | |
562 | ||
563 | mutex_lock(&overlay->mutex); | |
564 | ||
565 | WARN_ON(!overlay->stream[stream_id].claimed); | |
566 | vmw_overlay_stop(dev_priv, stream_id, false, false); | |
567 | overlay->stream[stream_id].claimed = false; | |
568 | ||
569 | mutex_unlock(&overlay->mutex); | |
570 | return 0; | |
571 | } | |
572 | ||
573 | int vmw_overlay_init(struct vmw_private *dev_priv) | |
574 | { | |
575 | struct vmw_overlay *overlay; | |
576 | int i; | |
577 | ||
578 | if (dev_priv->overlay_priv) | |
579 | return -EINVAL; | |
580 | ||
f35119d6 | 581 | overlay = kzalloc(sizeof(*overlay), GFP_KERNEL); |
fb1d9738 JB |
582 | if (!overlay) |
583 | return -ENOMEM; | |
584 | ||
fb1d9738 JB |
585 | mutex_init(&overlay->mutex); |
586 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
587 | overlay->stream[i].buf = NULL; | |
588 | overlay->stream[i].paused = false; | |
589 | overlay->stream[i].claimed = false; | |
590 | } | |
591 | ||
592 | dev_priv->overlay_priv = overlay; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | int vmw_overlay_close(struct vmw_private *dev_priv) | |
598 | { | |
599 | struct vmw_overlay *overlay = dev_priv->overlay_priv; | |
600 | bool forgotten_buffer = false; | |
601 | int i; | |
602 | ||
603 | if (!overlay) | |
604 | return -ENOSYS; | |
605 | ||
606 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { | |
607 | if (overlay->stream[i].buf) { | |
608 | forgotten_buffer = true; | |
609 | vmw_overlay_stop(dev_priv, i, false, false); | |
610 | } | |
611 | } | |
612 | ||
613 | WARN_ON(forgotten_buffer); | |
614 | ||
615 | dev_priv->overlay_priv = NULL; | |
616 | kfree(overlay); | |
617 | ||
618 | return 0; | |
619 | } |