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1/**************************************************************************
2 *
3 * Copyright © 2009-2014 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 <drm/drmP.h>
30#include "vmwgfx_drv.h"
31
32#include <drm/ttm/ttm_placement.h>
33
34#include "device_include/svga_overlay.h"
35#include "device_include/svga_escape.h"
36
37#define VMW_MAX_NUM_STREAMS 1
38#define VMW_OVERLAY_CAP_MASK (SVGA_FIFO_CAP_VIDEO | SVGA_FIFO_CAP_ESCAPE)
39
40struct vmw_stream {
41 struct vmw_dma_buffer *buf;
42 bool claimed;
43 bool paused;
44 struct drm_vmw_control_stream_arg saved;
45};
46
47/**
48 * Overlay control
49 */
50struct 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
58static 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
64struct vmw_escape_header {
65 uint32_t cmd;
66 SVGAFifoCmdEscape body;
67};
68
69struct vmw_escape_video_flush {
70 struct vmw_escape_header escape;
71 SVGAEscapeVideoFlush flush;
72};
73
74static 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
82static 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
90/**
91 * Send put command to hw.
92 *
93 * Returns
94 * -ERESTARTSYS if interrupted by a signal.
95 */
96static int vmw_overlay_send_put(struct vmw_private *dev_priv,
97 struct vmw_dma_buffer *buf,
98 struct drm_vmw_control_stream_arg *arg,
99 bool interruptible)
100{
101 struct vmw_escape_video_flush *flush;
102 size_t fifo_size;
103 bool have_so = (dev_priv->active_display_unit == vmw_du_screen_object);
104 int i, num_items;
105 SVGAGuestPtr ptr;
106
107 struct {
108 struct vmw_escape_header escape;
109 struct {
110 uint32_t cmdType;
111 uint32_t streamId;
112 } header;
113 } *cmds;
114 struct {
115 uint32_t registerId;
116 uint32_t value;
117 } *items;
118
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
127 cmds = vmw_fifo_reserve(dev_priv, fifo_size);
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
145 vmw_bo_get_guest_ptr(&buf->base, &ptr);
146 ptr.offset += arg->offset;
147
148 items[SVGA_VIDEO_ENABLED].value = true;
149 items[SVGA_VIDEO_FLAGS].value = arg->flags;
150 items[SVGA_VIDEO_DATA_OFFSET].value = ptr.offset;
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) {
168 items[SVGA_VIDEO_DATA_GMRID].value = ptr.gmrId;
169 items[SVGA_VIDEO_DST_SCREEN_ID].value = SVGA_ID_INVALID;
170 }
171
172 fill_flush(flush, arg->stream_id);
173
174 vmw_fifo_commit(dev_priv, fifo_size);
175
176 return 0;
177}
178
179/**
180 * Send stop command to hw.
181 *
182 * Returns
183 * -ERESTARTSYS if interrupted by a signal.
184 */
185static 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 (;;) {
197 cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds));
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
221/**
222 * Move a buffer to vram or gmr if @pin is set, else unpin the buffer.
223 *
224 * With the introduction of screen objects buffers could now be
225 * used with GMRs instead of being locked to vram.
226 */
227static int vmw_overlay_move_buffer(struct vmw_private *dev_priv,
228 struct vmw_dma_buffer *buf,
229 bool pin, bool inter)
230{
231 if (!pin)
232 return vmw_dmabuf_unpin(dev_priv, buf, inter);
233
234 if (dev_priv->active_display_unit == vmw_du_legacy)
235 return vmw_dmabuf_pin_in_vram(dev_priv, buf, inter);
236
237 return vmw_dmabuf_pin_in_vram_or_gmr(dev_priv, buf, inter);
238}
239
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 */
252static 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 */
272 ret = vmw_overlay_move_buffer(dev_priv, stream->buf, false,
273 interruptible);
274 if (interruptible && ret == -ERESTARTSYS)
275 return ret;
276 else
277 BUG_ON(ret != 0);
278 }
279
280 if (!pause) {
281 vmw_dmabuf_unreference(&stream->buf);
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 */
299static int vmw_overlay_update_stream(struct vmw_private *dev_priv,
300 struct vmw_dma_buffer *buf,
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 */
335 ret = vmw_overlay_move_buffer(dev_priv, buf, true, interruptible);
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 */
344 BUG_ON(vmw_overlay_move_buffer(dev_priv, buf, false, false)
345 != 0);
346 return ret;
347 }
348
349 if (stream->buf != buf)
350 stream->buf = vmw_dmabuf_reference(buf);
351 stream->saved = *arg;
352 /* stream is no longer stopped/paused */
353 stream->paused = false;
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 */
365int 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 */
396int 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 */
430int 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
453
454static bool vmw_overlay_available(const struct vmw_private *dev_priv)
455{
456 return (dev_priv->overlay_priv != NULL &&
457 ((dev_priv->fifo.capabilities & VMW_OVERLAY_CAP_MASK) ==
458 VMW_OVERLAY_CAP_MASK));
459}
460
461int 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;
469 struct vmw_dma_buffer *buf;
470 struct vmw_resource *res;
471 int ret;
472
473 if (!vmw_overlay_available(dev_priv))
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
487 ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf, NULL);
488 if (ret)
489 goto out_unlock;
490
491 ret = vmw_overlay_update_stream(dev_priv, buf, arg, true);
492
493 vmw_dmabuf_unreference(&buf);
494
495out_unlock:
496 mutex_unlock(&overlay->mutex);
497 vmw_resource_unreference(&res);
498
499 return ret;
500}
501
502int vmw_overlay_num_overlays(struct vmw_private *dev_priv)
503{
504 if (!vmw_overlay_available(dev_priv))
505 return 0;
506
507 return VMW_MAX_NUM_STREAMS;
508}
509
510int 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
515 if (!vmw_overlay_available(dev_priv))
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
529int 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
554int 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
573int 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
581 overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
582 if (!overlay)
583 return -ENOMEM;
584
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
597int 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}
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
39struct 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 */
49struct 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
57static 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
63struct vmw_escape_header {
64 uint32_t cmd;
65 SVGAFifoCmdEscape body;
66};
67
68struct vmw_escape_video_flush {
69 struct vmw_escape_header escape;
70 SVGAEscapeVideoFlush flush;
71};
72
73static 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
81static 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 */
102static 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_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
118 if (pin)
119 overlay_placement = &vmw_vram_ne_placement;
120
121 ret = ttm_bo_validate(bo, overlay_placement, interruptible, false, false);
122
123 ttm_bo_unreserve(bo);
124
125err:
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 */
137static 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 */
214static 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 */
262static 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 */
309static 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 /* stream is no longer stopped/paused */
362 stream->paused = false;
363
364 return 0;
365}
366
367/**
368 * Stop all streams.
369 *
370 * Used by the fb code when starting.
371 *
372 * Takes the overlay lock.
373 */
374int vmw_overlay_stop_all(struct vmw_private *dev_priv)
375{
376 struct vmw_overlay *overlay = dev_priv->overlay_priv;
377 int i, ret;
378
379 if (!overlay)
380 return 0;
381
382 mutex_lock(&overlay->mutex);
383
384 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
385 struct vmw_stream *stream = &overlay->stream[i];
386 if (!stream->buf)
387 continue;
388
389 ret = vmw_overlay_stop(dev_priv, i, false, false);
390 WARN_ON(ret != 0);
391 }
392
393 mutex_unlock(&overlay->mutex);
394
395 return 0;
396}
397
398/**
399 * Try to resume all paused streams.
400 *
401 * Used by the kms code after moving a new scanout buffer to vram.
402 *
403 * Takes the overlay lock.
404 */
405int vmw_overlay_resume_all(struct vmw_private *dev_priv)
406{
407 struct vmw_overlay *overlay = dev_priv->overlay_priv;
408 int i, ret;
409
410 if (!overlay)
411 return 0;
412
413 mutex_lock(&overlay->mutex);
414
415 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
416 struct vmw_stream *stream = &overlay->stream[i];
417 if (!stream->paused)
418 continue;
419
420 ret = vmw_overlay_update_stream(dev_priv, stream->buf,
421 &stream->saved, false);
422 if (ret != 0)
423 DRM_INFO("%s: *warning* failed to resume stream %i\n",
424 __func__, i);
425 }
426
427 mutex_unlock(&overlay->mutex);
428
429 return 0;
430}
431
432/**
433 * Pauses all active streams.
434 *
435 * Used by the kms code when moving a new scanout buffer to vram.
436 *
437 * Takes the overlay lock.
438 */
439int vmw_overlay_pause_all(struct vmw_private *dev_priv)
440{
441 struct vmw_overlay *overlay = dev_priv->overlay_priv;
442 int i, ret;
443
444 if (!overlay)
445 return 0;
446
447 mutex_lock(&overlay->mutex);
448
449 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
450 if (overlay->stream[i].paused)
451 DRM_INFO("%s: *warning* stream %i already paused\n",
452 __func__, i);
453 ret = vmw_overlay_stop(dev_priv, i, true, false);
454 WARN_ON(ret != 0);
455 }
456
457 mutex_unlock(&overlay->mutex);
458
459 return 0;
460}
461
462int vmw_overlay_ioctl(struct drm_device *dev, void *data,
463 struct drm_file *file_priv)
464{
465 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
466 struct vmw_private *dev_priv = vmw_priv(dev);
467 struct vmw_overlay *overlay = dev_priv->overlay_priv;
468 struct drm_vmw_control_stream_arg *arg =
469 (struct drm_vmw_control_stream_arg *)data;
470 struct vmw_dma_buffer *buf;
471 struct vmw_resource *res;
472 int ret;
473
474 if (!overlay)
475 return -ENOSYS;
476
477 ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res);
478 if (ret)
479 return ret;
480
481 mutex_lock(&overlay->mutex);
482
483 if (!arg->enabled) {
484 ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true);
485 goto out_unlock;
486 }
487
488 ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf);
489 if (ret)
490 goto out_unlock;
491
492 ret = vmw_overlay_update_stream(dev_priv, buf, arg, true);
493
494 vmw_dmabuf_unreference(&buf);
495
496out_unlock:
497 mutex_unlock(&overlay->mutex);
498 vmw_resource_unreference(&res);
499
500 return ret;
501}
502
503int vmw_overlay_num_overlays(struct vmw_private *dev_priv)
504{
505 if (!dev_priv->overlay_priv)
506 return 0;
507
508 return VMW_MAX_NUM_STREAMS;
509}
510
511int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv)
512{
513 struct vmw_overlay *overlay = dev_priv->overlay_priv;
514 int i, k;
515
516 if (!overlay)
517 return 0;
518
519 mutex_lock(&overlay->mutex);
520
521 for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++)
522 if (!overlay->stream[i].claimed)
523 k++;
524
525 mutex_unlock(&overlay->mutex);
526
527 return k;
528}
529
530int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out)
531{
532 struct vmw_overlay *overlay = dev_priv->overlay_priv;
533 int i;
534
535 if (!overlay)
536 return -ENOSYS;
537
538 mutex_lock(&overlay->mutex);
539
540 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
541
542 if (overlay->stream[i].claimed)
543 continue;
544
545 overlay->stream[i].claimed = true;
546 *out = i;
547 mutex_unlock(&overlay->mutex);
548 return 0;
549 }
550
551 mutex_unlock(&overlay->mutex);
552 return -ESRCH;
553}
554
555int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id)
556{
557 struct vmw_overlay *overlay = dev_priv->overlay_priv;
558
559 BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS);
560
561 if (!overlay)
562 return -ENOSYS;
563
564 mutex_lock(&overlay->mutex);
565
566 WARN_ON(!overlay->stream[stream_id].claimed);
567 vmw_overlay_stop(dev_priv, stream_id, false, false);
568 overlay->stream[stream_id].claimed = false;
569
570 mutex_unlock(&overlay->mutex);
571 return 0;
572}
573
574int vmw_overlay_init(struct vmw_private *dev_priv)
575{
576 struct vmw_overlay *overlay;
577 int i;
578
579 if (dev_priv->overlay_priv)
580 return -EINVAL;
581
582 if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_VIDEO) &&
583 (dev_priv->fifo.capabilities & SVGA_FIFO_CAP_ESCAPE)) {
584 DRM_INFO("hardware doesn't support overlays\n");
585 return -ENOSYS;
586 }
587
588 overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
589 if (!overlay)
590 return -ENOMEM;
591
592 mutex_init(&overlay->mutex);
593 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
594 overlay->stream[i].buf = NULL;
595 overlay->stream[i].paused = false;
596 overlay->stream[i].claimed = false;
597 }
598
599 dev_priv->overlay_priv = overlay;
600
601 return 0;
602}
603
604int vmw_overlay_close(struct vmw_private *dev_priv)
605{
606 struct vmw_overlay *overlay = dev_priv->overlay_priv;
607 bool forgotten_buffer = false;
608 int i;
609
610 if (!overlay)
611 return -ENOSYS;
612
613 for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
614 if (overlay->stream[i].buf) {
615 forgotten_buffer = true;
616 vmw_overlay_stop(dev_priv, i, false, false);
617 }
618 }
619
620 WARN_ON(forgotten_buffer);
621
622 dev_priv->overlay_priv = NULL;
623 kfree(overlay);
624
625 return 0;
626}