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/drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c

https://bitbucket.org/ndreys/linux-sunxi
C | 627 lines | 400 code | 115 blank | 112 comment | 72 complexity | 04a7a73c19e4a169956fa1d26c5442a7 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1/**************************************************************************
  2 *
  3 * Copyright Š 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 = kmalloc(sizeof(*overlay), GFP_KERNEL);
589	if (!overlay)
590		return -ENOMEM;
591
592	memset(overlay, 0, sizeof(*overlay));
593	mutex_init(&overlay->mutex);
594	for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
595		overlay->stream[i].buf = NULL;
596		overlay->stream[i].paused = false;
597		overlay->stream[i].claimed = false;
598	}
599
600	dev_priv->overlay_priv = overlay;
601
602	return 0;
603}
604
605int vmw_overlay_close(struct vmw_private *dev_priv)
606{
607	struct vmw_overlay *overlay = dev_priv->overlay_priv;
608	bool forgotten_buffer = false;
609	int i;
610
611	if (!overlay)
612		return -ENOSYS;
613
614	for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) {
615		if (overlay->stream[i].buf) {
616			forgotten_buffer = true;
617			vmw_overlay_stop(dev_priv, i, false, false);
618		}
619	}
620
621	WARN_ON(forgotten_buffer);
622
623	dev_priv->overlay_priv = NULL;
624	kfree(overlay);
625
626	return 0;
627}