1 /******************************************************************************
2  *
3  * COPYRIGHT © 2014-2015 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 #include "vmwgfx_kms.h"
29 #include "device_include/svga3d_surfacedefs.h"
30 #include <drm/drm_plane_helper.h>
31 #include <drm/drm_atomic.h>
32 #include <drm/drm_atomic_helper.h>
33 
34 
35 #define vmw_crtc_to_stdu(x) \
36 	container_of(x, struct vmw_screen_target_display_unit, base.crtc)
37 #define vmw_encoder_to_stdu(x) \
38 	container_of(x, struct vmw_screen_target_display_unit, base.encoder)
39 #define vmw_connector_to_stdu(x) \
40 	container_of(x, struct vmw_screen_target_display_unit, base.connector)
41 
42 
43 
44 enum stdu_content_type {
45 	SAME_AS_DISPLAY = 0,
46 	SEPARATE_SURFACE,
47 	SEPARATE_DMA
48 };
49 
50 /**
51  * struct vmw_stdu_dirty - closure structure for the update functions
52  *
53  * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
54  * @transfer: Transfer direction for DMA command.
55  * @left: Left side of bounding box.
56  * @right: Right side of bounding box.
57  * @top: Top side of bounding box.
58  * @bottom: Bottom side of bounding box.
59  * @buf: DMA buffer when DMA-ing between buffer and screen targets.
60  * @sid: Surface ID when copying between surface and screen targets.
61  */
62 struct vmw_stdu_dirty {
63 	struct vmw_kms_dirty base;
64 	SVGA3dTransferType  transfer;
65 	s32 left, right, top, bottom;
66 	u32 pitch;
67 	union {
68 		struct vmw_dma_buffer *buf;
69 		u32 sid;
70 	};
71 };
72 
73 /*
74  * SVGA commands that are used by this code. Please see the device headers
75  * for explanation.
76  */
77 struct vmw_stdu_update {
78 	SVGA3dCmdHeader header;
79 	SVGA3dCmdUpdateGBScreenTarget body;
80 };
81 
82 struct vmw_stdu_dma {
83 	SVGA3dCmdHeader     header;
84 	SVGA3dCmdSurfaceDMA body;
85 };
86 
87 struct vmw_stdu_surface_copy {
88 	SVGA3dCmdHeader      header;
89 	SVGA3dCmdSurfaceCopy body;
90 };
91 
92 
93 /**
94  * struct vmw_screen_target_display_unit
95  *
96  * @base: VMW specific DU structure
97  * @display_srf: surface to be displayed.  The dimension of this will always
98  *               match the display mode.  If the display mode matches
99  *               content_vfbs dimensions, then this is a pointer into the
100  *               corresponding field in content_vfbs.  If not, then this
101  *               is a separate buffer to which content_vfbs will blit to.
102  * @content_type:  content_fb type
103  * @defined:  true if the current display unit has been initialized
104  */
105 struct vmw_screen_target_display_unit {
106 	struct vmw_display_unit base;
107 	const struct vmw_surface *display_srf;
108 	enum stdu_content_type content_fb_type;
109 	s32 display_width, display_height;
110 
111 	bool defined;
112 
113 	/* For CPU Blit */
114 	struct ttm_bo_kmap_obj host_map, guest_map;
115 	unsigned int cpp;
116 };
117 
118 
119 
120 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu);
121 
122 
123 
124 /******************************************************************************
125  * Screen Target Display Unit CRTC Functions
126  *****************************************************************************/
127 
128 
129 /**
130  * vmw_stdu_crtc_destroy - cleans up the STDU
131  *
132  * @crtc: used to get a reference to the containing STDU
133  */
134 static void vmw_stdu_crtc_destroy(struct drm_crtc *crtc)
135 {
136 	vmw_stdu_destroy(vmw_crtc_to_stdu(crtc));
137 }
138 
139 /**
140  * vmw_stdu_define_st - Defines a Screen Target
141  *
142  * @dev_priv:  VMW DRM device
143  * @stdu: display unit to create a Screen Target for
144  * @mode: The mode to set.
145  * @crtc_x: X coordinate of screen target relative to framebuffer origin.
146  * @crtc_y: Y coordinate of screen target relative to framebuffer origin.
147  *
148  * Creates a STDU that we can used later.  This function is called whenever the
149  * framebuffer size changes.
150  *
151  * RETURNs:
152  * 0 on success, error code on failure
153  */
154 static int vmw_stdu_define_st(struct vmw_private *dev_priv,
155 			      struct vmw_screen_target_display_unit *stdu,
156 			      struct drm_display_mode *mode,
157 			      int crtc_x, int crtc_y)
158 {
159 	struct {
160 		SVGA3dCmdHeader header;
161 		SVGA3dCmdDefineGBScreenTarget body;
162 	} *cmd;
163 
164 	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
165 
166 	if (unlikely(cmd == NULL)) {
167 		DRM_ERROR("Out of FIFO space defining Screen Target\n");
168 		return -ENOMEM;
169 	}
170 
171 	cmd->header.id   = SVGA_3D_CMD_DEFINE_GB_SCREENTARGET;
172 	cmd->header.size = sizeof(cmd->body);
173 
174 	cmd->body.stid   = stdu->base.unit;
175 	cmd->body.width  = mode->hdisplay;
176 	cmd->body.height = mode->vdisplay;
177 	cmd->body.flags  = (0 == cmd->body.stid) ? SVGA_STFLAG_PRIMARY : 0;
178 	cmd->body.dpi    = 0;
179 	if (stdu->base.is_implicit) {
180 		cmd->body.xRoot  = crtc_x;
181 		cmd->body.yRoot  = crtc_y;
182 	} else {
183 		cmd->body.xRoot  = stdu->base.gui_x;
184 		cmd->body.yRoot  = stdu->base.gui_y;
185 	}
186 	stdu->base.set_gui_x = cmd->body.xRoot;
187 	stdu->base.set_gui_y = cmd->body.yRoot;
188 
189 	vmw_fifo_commit(dev_priv, sizeof(*cmd));
190 
191 	stdu->defined = true;
192 	stdu->display_width  = mode->hdisplay;
193 	stdu->display_height = mode->vdisplay;
194 
195 	return 0;
196 }
197 
198 
199 
200 /**
201  * vmw_stdu_bind_st - Binds a surface to a Screen Target
202  *
203  * @dev_priv: VMW DRM device
204  * @stdu: display unit affected
205  * @res: Buffer to bind to the screen target.  Set to NULL to blank screen.
206  *
207  * Binding a surface to a Screen Target the same as flipping
208  */
209 static int vmw_stdu_bind_st(struct vmw_private *dev_priv,
210 			    struct vmw_screen_target_display_unit *stdu,
211 			    const struct vmw_resource *res)
212 {
213 	SVGA3dSurfaceImageId image;
214 
215 	struct {
216 		SVGA3dCmdHeader header;
217 		SVGA3dCmdBindGBScreenTarget body;
218 	} *cmd;
219 
220 
221 	if (!stdu->defined) {
222 		DRM_ERROR("No screen target defined\n");
223 		return -EINVAL;
224 	}
225 
226 	/* Set up image using information in vfb */
227 	memset(&image, 0, sizeof(image));
228 	image.sid = res ? res->id : SVGA3D_INVALID_ID;
229 
230 	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
231 
232 	if (unlikely(cmd == NULL)) {
233 		DRM_ERROR("Out of FIFO space binding a screen target\n");
234 		return -ENOMEM;
235 	}
236 
237 	cmd->header.id   = SVGA_3D_CMD_BIND_GB_SCREENTARGET;
238 	cmd->header.size = sizeof(cmd->body);
239 
240 	cmd->body.stid   = stdu->base.unit;
241 	cmd->body.image  = image;
242 
243 	vmw_fifo_commit(dev_priv, sizeof(*cmd));
244 
245 	return 0;
246 }
247 
248 /**
249  * vmw_stdu_populate_update - populate an UPDATE_GB_SCREENTARGET command with a
250  * bounding box.
251  *
252  * @cmd: Pointer to command stream.
253  * @unit: Screen target unit.
254  * @left: Left side of bounding box.
255  * @right: Right side of bounding box.
256  * @top: Top side of bounding box.
257  * @bottom: Bottom side of bounding box.
258  */
259 static void vmw_stdu_populate_update(void *cmd, int unit,
260 				     s32 left, s32 right, s32 top, s32 bottom)
261 {
262 	struct vmw_stdu_update *update = cmd;
263 
264 	update->header.id   = SVGA_3D_CMD_UPDATE_GB_SCREENTARGET;
265 	update->header.size = sizeof(update->body);
266 
267 	update->body.stid   = unit;
268 	update->body.rect.x = left;
269 	update->body.rect.y = top;
270 	update->body.rect.w = right - left;
271 	update->body.rect.h = bottom - top;
272 }
273 
274 /**
275  * vmw_stdu_update_st - Full update of a Screen Target
276  *
277  * @dev_priv: VMW DRM device
278  * @stdu: display unit affected
279  *
280  * This function needs to be called whenever the content of a screen
281  * target has changed completely. Typically as a result of a backing
282  * surface change.
283  *
284  * RETURNS:
285  * 0 on success, error code on failure
286  */
287 static int vmw_stdu_update_st(struct vmw_private *dev_priv,
288 			      struct vmw_screen_target_display_unit *stdu)
289 {
290 	struct vmw_stdu_update *cmd;
291 
292 	if (!stdu->defined) {
293 		DRM_ERROR("No screen target defined");
294 		return -EINVAL;
295 	}
296 
297 	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
298 
299 	if (unlikely(cmd == NULL)) {
300 		DRM_ERROR("Out of FIFO space updating a Screen Target\n");
301 		return -ENOMEM;
302 	}
303 
304 	vmw_stdu_populate_update(cmd, stdu->base.unit,
305 				 0, stdu->display_width,
306 				 0, stdu->display_height);
307 
308 	vmw_fifo_commit(dev_priv, sizeof(*cmd));
309 
310 	return 0;
311 }
312 
313 
314 
315 /**
316  * vmw_stdu_destroy_st - Destroy a Screen Target
317  *
318  * @dev_priv:  VMW DRM device
319  * @stdu: display unit to destroy
320  */
321 static int vmw_stdu_destroy_st(struct vmw_private *dev_priv,
322 			       struct vmw_screen_target_display_unit *stdu)
323 {
324 	int    ret;
325 
326 	struct {
327 		SVGA3dCmdHeader header;
328 		SVGA3dCmdDestroyGBScreenTarget body;
329 	} *cmd;
330 
331 
332 	/* Nothing to do if not successfully defined */
333 	if (unlikely(!stdu->defined))
334 		return 0;
335 
336 	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
337 
338 	if (unlikely(cmd == NULL)) {
339 		DRM_ERROR("Out of FIFO space, screen target not destroyed\n");
340 		return -ENOMEM;
341 	}
342 
343 	cmd->header.id   = SVGA_3D_CMD_DESTROY_GB_SCREENTARGET;
344 	cmd->header.size = sizeof(cmd->body);
345 
346 	cmd->body.stid   = stdu->base.unit;
347 
348 	vmw_fifo_commit(dev_priv, sizeof(*cmd));
349 
350 	/* Force sync */
351 	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
352 	if (unlikely(ret != 0))
353 		DRM_ERROR("Failed to sync with HW");
354 
355 	stdu->defined = false;
356 	stdu->display_width  = 0;
357 	stdu->display_height = 0;
358 
359 	return ret;
360 }
361 
362 
363 /**
364  * vmw_stdu_crtc_mode_set_nofb - Updates screen target size
365  *
366  * @crtc: CRTC associated with the screen target
367  *
368  * This function defines/destroys a screen target
369  *
370  */
371 static void vmw_stdu_crtc_mode_set_nofb(struct drm_crtc *crtc)
372 {
373 	struct vmw_private *dev_priv;
374 	struct vmw_screen_target_display_unit *stdu;
375 	int ret;
376 
377 
378 	stdu     = vmw_crtc_to_stdu(crtc);
379 	dev_priv = vmw_priv(crtc->dev);
380 
381 	if (stdu->defined) {
382 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
383 		if (ret)
384 			DRM_ERROR("Failed to blank CRTC\n");
385 
386 		(void) vmw_stdu_update_st(dev_priv, stdu);
387 
388 		ret = vmw_stdu_destroy_st(dev_priv, stdu);
389 		if (ret)
390 			DRM_ERROR("Failed to destroy Screen Target\n");
391 
392 		stdu->content_fb_type = SAME_AS_DISPLAY;
393 	}
394 
395 	if (!crtc->state->enable)
396 		return;
397 
398 	vmw_svga_enable(dev_priv);
399 	ret = vmw_stdu_define_st(dev_priv, stdu, &crtc->mode, crtc->x, crtc->y);
400 
401 	if (ret)
402 		DRM_ERROR("Failed to define Screen Target of size %dx%d\n",
403 			  crtc->x, crtc->y);
404 }
405 
406 
407 static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
408 {
409 }
410 
411 
412 static void vmw_stdu_crtc_helper_commit(struct drm_crtc *crtc)
413 {
414 	struct vmw_private *dev_priv;
415 	struct vmw_screen_target_display_unit *stdu;
416 	struct vmw_framebuffer *vfb;
417 	struct drm_framebuffer *fb;
418 
419 
420 	stdu     = vmw_crtc_to_stdu(crtc);
421 	dev_priv = vmw_priv(crtc->dev);
422 	fb       = crtc->primary->fb;
423 
424 	vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
425 
426 	if (vfb)
427 		vmw_kms_add_active(dev_priv, &stdu->base, vfb);
428 	else
429 		vmw_kms_del_active(dev_priv, &stdu->base);
430 }
431 
432 static void vmw_stdu_crtc_helper_disable(struct drm_crtc *crtc)
433 {
434 	struct vmw_private *dev_priv;
435 	struct vmw_screen_target_display_unit *stdu;
436 	int ret;
437 
438 
439 	if (!crtc) {
440 		DRM_ERROR("CRTC is NULL\n");
441 		return;
442 	}
443 
444 	stdu     = vmw_crtc_to_stdu(crtc);
445 	dev_priv = vmw_priv(crtc->dev);
446 
447 	if (stdu->defined) {
448 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
449 		if (ret)
450 			DRM_ERROR("Failed to blank CRTC\n");
451 
452 		(void) vmw_stdu_update_st(dev_priv, stdu);
453 
454 		ret = vmw_stdu_destroy_st(dev_priv, stdu);
455 		if (ret)
456 			DRM_ERROR("Failed to destroy Screen Target\n");
457 
458 		stdu->content_fb_type = SAME_AS_DISPLAY;
459 	}
460 }
461 
462 /**
463  * vmw_stdu_crtc_page_flip - Binds a buffer to a screen target
464  *
465  * @crtc: CRTC to attach FB to
466  * @fb: FB to attach
467  * @event: Event to be posted. This event should've been alloced
468  *         using k[mz]alloc, and should've been completely initialized.
469  * @page_flip_flags: Input flags.
470  *
471  * If the STDU uses the same display and content buffers, i.e. a true flip,
472  * this function will replace the existing display buffer with the new content
473  * buffer.
474  *
475  * If the STDU uses different display and content buffers, i.e. a blit, then
476  * only the content buffer will be updated.
477  *
478  * RETURNS:
479  * 0 on success, error code on failure
480  */
481 static int vmw_stdu_crtc_page_flip(struct drm_crtc *crtc,
482 				   struct drm_framebuffer *new_fb,
483 				   struct drm_pending_vblank_event *event,
484 				   uint32_t flags,
485 				   struct drm_modeset_acquire_ctx *ctx)
486 
487 {
488 	struct vmw_private *dev_priv = vmw_priv(crtc->dev);
489 	struct vmw_screen_target_display_unit *stdu = vmw_crtc_to_stdu(crtc);
490 	struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(new_fb);
491 	struct drm_vmw_rect vclips;
492 	int ret;
493 
494 	dev_priv          = vmw_priv(crtc->dev);
495 	stdu              = vmw_crtc_to_stdu(crtc);
496 
497 	if (!stdu->defined || !vmw_kms_crtc_flippable(dev_priv, crtc))
498 		return -EINVAL;
499 
500 	/*
501 	 * We're always async, but the helper doesn't know how to set async
502 	 * so lie to the helper. Also, the helper expects someone
503 	 * to pick the event up from the crtc state, and if nobody does,
504 	 * it will free it. Since we handle the event in this function,
505 	 * don't hand it to the helper.
506 	 */
507 	flags &= ~DRM_MODE_PAGE_FLIP_ASYNC;
508 	ret = drm_atomic_helper_page_flip(crtc, new_fb, NULL, flags, ctx);
509 	if (ret) {
510 		DRM_ERROR("Page flip error %d.\n", ret);
511 		return ret;
512 	}
513 
514 	if (stdu->base.is_implicit)
515 		vmw_kms_update_implicit_fb(dev_priv, crtc);
516 
517 	/*
518 	 * Now that we've bound a new surface to the screen target,
519 	 * update the contents.
520 	 */
521 	vclips.x = crtc->x;
522 	vclips.y = crtc->y;
523 	vclips.w = crtc->mode.hdisplay;
524 	vclips.h = crtc->mode.vdisplay;
525 
526 	if (vfb->dmabuf)
527 		ret = vmw_kms_stdu_dma(dev_priv, NULL, vfb, NULL, NULL, &vclips,
528 				       1, 1, true, false);
529 	else
530 		ret = vmw_kms_stdu_surface_dirty(dev_priv, vfb, NULL, &vclips,
531 						 NULL, 0, 0, 1, 1, NULL);
532 	if (ret) {
533 		DRM_ERROR("Page flip update error %d.\n", ret);
534 		return ret;
535 	}
536 
537 	if (event) {
538 		struct vmw_fence_obj *fence = NULL;
539 		struct drm_file *file_priv = event->base.file_priv;
540 
541 		vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
542 		if (!fence)
543 			return -ENOMEM;
544 
545 		ret = vmw_event_fence_action_queue(file_priv, fence,
546 						   &event->base,
547 						   &event->event.tv_sec,
548 						   &event->event.tv_usec,
549 						   true);
550 		vmw_fence_obj_unreference(&fence);
551 	} else {
552 		(void) vmw_fifo_flush(dev_priv, false);
553 	}
554 
555 	return 0;
556 }
557 
558 
559 /**
560  * vmw_stdu_dmabuf_clip - Callback to encode a suface DMA command cliprect
561  *
562  * @dirty: The closure structure.
563  *
564  * Encodes a surface DMA command cliprect and updates the bounding box
565  * for the DMA.
566  */
567 static void vmw_stdu_dmabuf_clip(struct vmw_kms_dirty *dirty)
568 {
569 	struct vmw_stdu_dirty *ddirty =
570 		container_of(dirty, struct vmw_stdu_dirty, base);
571 	struct vmw_stdu_dma *cmd = dirty->cmd;
572 	struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
573 
574 	blit += dirty->num_hits;
575 	blit->srcx = dirty->fb_x;
576 	blit->srcy = dirty->fb_y;
577 	blit->x = dirty->unit_x1;
578 	blit->y = dirty->unit_y1;
579 	blit->d = 1;
580 	blit->w = dirty->unit_x2 - dirty->unit_x1;
581 	blit->h = dirty->unit_y2 - dirty->unit_y1;
582 	dirty->num_hits++;
583 
584 	if (ddirty->transfer != SVGA3D_WRITE_HOST_VRAM)
585 		return;
586 
587 	/* Destination bounding box */
588 	ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
589 	ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
590 	ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
591 	ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
592 }
593 
594 /**
595  * vmw_stdu_dmabuf_fifo_commit - Callback to fill in and submit a DMA command.
596  *
597  * @dirty: The closure structure.
598  *
599  * Fills in the missing fields in a DMA command, and optionally encodes
600  * a screen target update command, depending on transfer direction.
601  */
602 static void vmw_stdu_dmabuf_fifo_commit(struct vmw_kms_dirty *dirty)
603 {
604 	struct vmw_stdu_dirty *ddirty =
605 		container_of(dirty, struct vmw_stdu_dirty, base);
606 	struct vmw_screen_target_display_unit *stdu =
607 		container_of(dirty->unit, typeof(*stdu), base);
608 	struct vmw_stdu_dma *cmd = dirty->cmd;
609 	struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
610 	SVGA3dCmdSurfaceDMASuffix *suffix =
611 		(SVGA3dCmdSurfaceDMASuffix *) &blit[dirty->num_hits];
612 	size_t blit_size = sizeof(*blit) * dirty->num_hits + sizeof(*suffix);
613 
614 	if (!dirty->num_hits) {
615 		vmw_fifo_commit(dirty->dev_priv, 0);
616 		return;
617 	}
618 
619 	cmd->header.id = SVGA_3D_CMD_SURFACE_DMA;
620 	cmd->header.size = sizeof(cmd->body) + blit_size;
621 	vmw_bo_get_guest_ptr(&ddirty->buf->base, &cmd->body.guest.ptr);
622 	cmd->body.guest.pitch = ddirty->pitch;
623 	cmd->body.host.sid = stdu->display_srf->res.id;
624 	cmd->body.host.face = 0;
625 	cmd->body.host.mipmap = 0;
626 	cmd->body.transfer = ddirty->transfer;
627 	suffix->suffixSize = sizeof(*suffix);
628 	suffix->maximumOffset = ddirty->buf->base.num_pages * PAGE_SIZE;
629 
630 	if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM) {
631 		blit_size += sizeof(struct vmw_stdu_update);
632 
633 		vmw_stdu_populate_update(&suffix[1], stdu->base.unit,
634 					 ddirty->left, ddirty->right,
635 					 ddirty->top, ddirty->bottom);
636 	}
637 
638 	vmw_fifo_commit(dirty->dev_priv, sizeof(*cmd) + blit_size);
639 
640 	ddirty->left = ddirty->top = S32_MAX;
641 	ddirty->right = ddirty->bottom = S32_MIN;
642 }
643 
644 
645 /**
646  * vmw_stdu_dmabuf_cpu_clip - Callback to encode a CPU blit
647  *
648  * @dirty: The closure structure.
649  *
650  * This function calculates the bounding box for all the incoming clips
651  */
652 static void vmw_stdu_dmabuf_cpu_clip(struct vmw_kms_dirty *dirty)
653 {
654 	struct vmw_stdu_dirty *ddirty =
655 		container_of(dirty, struct vmw_stdu_dirty, base);
656 
657 	dirty->num_hits = 1;
658 
659 	/* Calculate bounding box */
660 	ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
661 	ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
662 	ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
663 	ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
664 }
665 
666 
667 /**
668  * vmw_stdu_dmabuf_cpu_commit - Callback to do a CPU blit from DMAbuf
669  *
670  * @dirty: The closure structure.
671  *
672  * For the special case when we cannot create a proxy surface in a
673  * 2D VM, we have to do a CPU blit ourselves.
674  */
675 static void vmw_stdu_dmabuf_cpu_commit(struct vmw_kms_dirty *dirty)
676 {
677 	struct vmw_stdu_dirty *ddirty =
678 		container_of(dirty, struct vmw_stdu_dirty, base);
679 	struct vmw_screen_target_display_unit *stdu =
680 		container_of(dirty->unit, typeof(*stdu), base);
681 	s32 width, height;
682 	s32 src_pitch, dst_pitch;
683 	u8 *src, *dst;
684 	bool not_used;
685 
686 
687 	if (!dirty->num_hits)
688 		return;
689 
690 	width = ddirty->right - ddirty->left;
691 	height = ddirty->bottom - ddirty->top;
692 
693 	if (width == 0 || height == 0)
694 		return;
695 
696 
697 	/* Assume we are blitting from Host (display_srf) to Guest (dmabuf) */
698 	src_pitch = stdu->display_srf->base_size.width * stdu->cpp;
699 	src = ttm_kmap_obj_virtual(&stdu->host_map, &not_used);
700 	src += dirty->unit_y1 * src_pitch + dirty->unit_x1 * stdu->cpp;
701 
702 	dst_pitch = ddirty->pitch;
703 	dst = ttm_kmap_obj_virtual(&stdu->guest_map, &not_used);
704 	dst += dirty->fb_y * dst_pitch + dirty->fb_x * stdu->cpp;
705 
706 
707 	/* Figure out the real direction */
708 	if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM) {
709 		u8 *tmp;
710 		s32 tmp_pitch;
711 
712 		tmp = src;
713 		tmp_pitch = src_pitch;
714 
715 		src = dst;
716 		src_pitch = dst_pitch;
717 
718 		dst = tmp;
719 		dst_pitch = tmp_pitch;
720 	}
721 
722 	/* CPU Blit */
723 	while (height-- > 0) {
724 		memcpy(dst, src, width * stdu->cpp);
725 		dst += dst_pitch;
726 		src += src_pitch;
727 	}
728 
729 	if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM) {
730 		struct vmw_private *dev_priv;
731 		struct vmw_stdu_update *cmd;
732 		struct drm_clip_rect region;
733 		int ret;
734 
735 		/* We are updating the actual surface, not a proxy */
736 		region.x1 = ddirty->left;
737 		region.x2 = ddirty->right;
738 		region.y1 = ddirty->top;
739 		region.y2 = ddirty->bottom;
740 		ret = vmw_kms_update_proxy(
741 			(struct vmw_resource *) &stdu->display_srf->res,
742 			(const struct drm_clip_rect *) &region, 1, 1);
743 		if (ret)
744 			goto out_cleanup;
745 
746 
747 		dev_priv = vmw_priv(stdu->base.crtc.dev);
748 		cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
749 
750 		if (!cmd) {
751 			DRM_ERROR("Cannot reserve FIFO space to update STDU");
752 			goto out_cleanup;
753 		}
754 
755 		vmw_stdu_populate_update(cmd, stdu->base.unit,
756 					 ddirty->left, ddirty->right,
757 					 ddirty->top, ddirty->bottom);
758 
759 		vmw_fifo_commit(dev_priv, sizeof(*cmd));
760 	}
761 
762 out_cleanup:
763 	ddirty->left = ddirty->top = S32_MAX;
764 	ddirty->right = ddirty->bottom = S32_MIN;
765 }
766 
767 /**
768  * vmw_kms_stdu_dma - Perform a DMA transfer between a dma-buffer backed
769  * framebuffer and the screen target system.
770  *
771  * @dev_priv: Pointer to the device private structure.
772  * @file_priv: Pointer to a struct drm-file identifying the caller. May be
773  * set to NULL, but then @user_fence_rep must also be set to NULL.
774  * @vfb: Pointer to the dma-buffer backed framebuffer.
775  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
776  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
777  * be NULL.
778  * @num_clips: Number of clip rects in @clips or @vclips.
779  * @increment: Increment to use when looping over @clips or @vclips.
780  * @to_surface: Whether to DMA to the screen target system as opposed to
781  * from the screen target system.
782  * @interruptible: Whether to perform waits interruptible if possible.
783  *
784  * If DMA-ing till the screen target system, the function will also notify
785  * the screen target system that a bounding box of the cliprects has been
786  * updated.
787  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
788  * interrupted.
789  */
790 int vmw_kms_stdu_dma(struct vmw_private *dev_priv,
791 		     struct drm_file *file_priv,
792 		     struct vmw_framebuffer *vfb,
793 		     struct drm_vmw_fence_rep __user *user_fence_rep,
794 		     struct drm_clip_rect *clips,
795 		     struct drm_vmw_rect *vclips,
796 		     uint32_t num_clips,
797 		     int increment,
798 		     bool to_surface,
799 		     bool interruptible)
800 {
801 	struct vmw_dma_buffer *buf =
802 		container_of(vfb, struct vmw_framebuffer_dmabuf, base)->buffer;
803 	struct vmw_stdu_dirty ddirty;
804 	int ret;
805 
806 	ret = vmw_kms_helper_buffer_prepare(dev_priv, buf, interruptible,
807 					    false);
808 	if (ret)
809 		return ret;
810 
811 	ddirty.transfer = (to_surface) ? SVGA3D_WRITE_HOST_VRAM :
812 		SVGA3D_READ_HOST_VRAM;
813 	ddirty.left = ddirty.top = S32_MAX;
814 	ddirty.right = ddirty.bottom = S32_MIN;
815 	ddirty.pitch = vfb->base.pitches[0];
816 	ddirty.buf = buf;
817 	ddirty.base.fifo_commit = vmw_stdu_dmabuf_fifo_commit;
818 	ddirty.base.clip = vmw_stdu_dmabuf_clip;
819 	ddirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_dma) +
820 		num_clips * sizeof(SVGA3dCopyBox) +
821 		sizeof(SVGA3dCmdSurfaceDMASuffix);
822 	if (to_surface)
823 		ddirty.base.fifo_reserve_size += sizeof(struct vmw_stdu_update);
824 
825 	/* 2D VMs cannot use SVGA_3D_CMD_SURFACE_DMA so do CPU blit instead */
826 	if (!(dev_priv->capabilities & SVGA_CAP_3D)) {
827 		ddirty.base.fifo_commit = vmw_stdu_dmabuf_cpu_commit;
828 		ddirty.base.clip = vmw_stdu_dmabuf_cpu_clip;
829 		ddirty.base.fifo_reserve_size = 0;
830 	}
831 
832 	ret = vmw_kms_helper_dirty(dev_priv, vfb, clips, vclips,
833 				   0, 0, num_clips, increment, &ddirty.base);
834 	vmw_kms_helper_buffer_finish(dev_priv, file_priv, buf, NULL,
835 				     user_fence_rep);
836 
837 	return ret;
838 }
839 
840 /**
841  * vmw_stdu_surface_clip - Callback to encode a surface copy command cliprect
842  *
843  * @dirty: The closure structure.
844  *
845  * Encodes a surface copy command cliprect and updates the bounding box
846  * for the copy.
847  */
848 static void vmw_kms_stdu_surface_clip(struct vmw_kms_dirty *dirty)
849 {
850 	struct vmw_stdu_dirty *sdirty =
851 		container_of(dirty, struct vmw_stdu_dirty, base);
852 	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
853 	struct vmw_screen_target_display_unit *stdu =
854 		container_of(dirty->unit, typeof(*stdu), base);
855 
856 	if (sdirty->sid != stdu->display_srf->res.id) {
857 		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
858 
859 		blit += dirty->num_hits;
860 		blit->srcx = dirty->fb_x;
861 		blit->srcy = dirty->fb_y;
862 		blit->x = dirty->unit_x1;
863 		blit->y = dirty->unit_y1;
864 		blit->d = 1;
865 		blit->w = dirty->unit_x2 - dirty->unit_x1;
866 		blit->h = dirty->unit_y2 - dirty->unit_y1;
867 	}
868 
869 	dirty->num_hits++;
870 
871 	/* Destination bounding box */
872 	sdirty->left = min_t(s32, sdirty->left, dirty->unit_x1);
873 	sdirty->top = min_t(s32, sdirty->top, dirty->unit_y1);
874 	sdirty->right = max_t(s32, sdirty->right, dirty->unit_x2);
875 	sdirty->bottom = max_t(s32, sdirty->bottom, dirty->unit_y2);
876 }
877 
878 /**
879  * vmw_stdu_surface_fifo_commit - Callback to fill in and submit a surface
880  * copy command.
881  *
882  * @dirty: The closure structure.
883  *
884  * Fills in the missing fields in a surface copy command, and encodes a screen
885  * target update command.
886  */
887 static void vmw_kms_stdu_surface_fifo_commit(struct vmw_kms_dirty *dirty)
888 {
889 	struct vmw_stdu_dirty *sdirty =
890 		container_of(dirty, struct vmw_stdu_dirty, base);
891 	struct vmw_screen_target_display_unit *stdu =
892 		container_of(dirty->unit, typeof(*stdu), base);
893 	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
894 	struct vmw_stdu_update *update;
895 	size_t blit_size = sizeof(SVGA3dCopyBox) * dirty->num_hits;
896 	size_t commit_size;
897 
898 	if (!dirty->num_hits) {
899 		vmw_fifo_commit(dirty->dev_priv, 0);
900 		return;
901 	}
902 
903 	if (sdirty->sid != stdu->display_srf->res.id) {
904 		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
905 
906 		cmd->header.id = SVGA_3D_CMD_SURFACE_COPY;
907 		cmd->header.size = sizeof(cmd->body) + blit_size;
908 		cmd->body.src.sid = sdirty->sid;
909 		cmd->body.dest.sid = stdu->display_srf->res.id;
910 		update = (struct vmw_stdu_update *) &blit[dirty->num_hits];
911 		commit_size = sizeof(*cmd) + blit_size + sizeof(*update);
912 	} else {
913 		update = dirty->cmd;
914 		commit_size = sizeof(*update);
915 	}
916 
917 	vmw_stdu_populate_update(update, stdu->base.unit, sdirty->left,
918 				 sdirty->right, sdirty->top, sdirty->bottom);
919 
920 	vmw_fifo_commit(dirty->dev_priv, commit_size);
921 
922 	sdirty->left = sdirty->top = S32_MAX;
923 	sdirty->right = sdirty->bottom = S32_MIN;
924 }
925 
926 /**
927  * vmw_kms_stdu_surface_dirty - Dirty part of a surface backed framebuffer
928  *
929  * @dev_priv: Pointer to the device private structure.
930  * @framebuffer: Pointer to the surface-buffer backed framebuffer.
931  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
932  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
933  * be NULL.
934  * @srf: Pointer to surface to blit from. If NULL, the surface attached
935  * to @framebuffer will be used.
936  * @dest_x: X coordinate offset to align @srf with framebuffer coordinates.
937  * @dest_y: Y coordinate offset to align @srf with framebuffer coordinates.
938  * @num_clips: Number of clip rects in @clips.
939  * @inc: Increment to use when looping over @clips.
940  * @out_fence: If non-NULL, will return a ref-counted pointer to a
941  * struct vmw_fence_obj. The returned fence pointer may be NULL in which
942  * case the device has already synchronized.
943  *
944  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
945  * interrupted.
946  */
947 int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
948 			       struct vmw_framebuffer *framebuffer,
949 			       struct drm_clip_rect *clips,
950 			       struct drm_vmw_rect *vclips,
951 			       struct vmw_resource *srf,
952 			       s32 dest_x,
953 			       s32 dest_y,
954 			       unsigned num_clips, int inc,
955 			       struct vmw_fence_obj **out_fence)
956 {
957 	struct vmw_framebuffer_surface *vfbs =
958 		container_of(framebuffer, typeof(*vfbs), base);
959 	struct vmw_stdu_dirty sdirty;
960 	int ret;
961 
962 	if (!srf)
963 		srf = &vfbs->surface->res;
964 
965 	ret = vmw_kms_helper_resource_prepare(srf, true);
966 	if (ret)
967 		return ret;
968 
969 	if (vfbs->is_dmabuf_proxy) {
970 		ret = vmw_kms_update_proxy(srf, clips, num_clips, inc);
971 		if (ret)
972 			goto out_finish;
973 	}
974 
975 	sdirty.base.fifo_commit = vmw_kms_stdu_surface_fifo_commit;
976 	sdirty.base.clip = vmw_kms_stdu_surface_clip;
977 	sdirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_surface_copy) +
978 		sizeof(SVGA3dCopyBox) * num_clips +
979 		sizeof(struct vmw_stdu_update);
980 	sdirty.sid = srf->id;
981 	sdirty.left = sdirty.top = S32_MAX;
982 	sdirty.right = sdirty.bottom = S32_MIN;
983 
984 	ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
985 				   dest_x, dest_y, num_clips, inc,
986 				   &sdirty.base);
987 out_finish:
988 	vmw_kms_helper_resource_finish(srf, out_fence);
989 
990 	return ret;
991 }
992 
993 
994 /*
995  *  Screen Target CRTC dispatch table
996  */
997 static const struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
998 	.gamma_set = vmw_du_crtc_gamma_set,
999 	.destroy = vmw_stdu_crtc_destroy,
1000 	.reset = vmw_du_crtc_reset,
1001 	.atomic_duplicate_state = vmw_du_crtc_duplicate_state,
1002 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
1003 	.set_config = vmw_kms_set_config,
1004 	.page_flip = vmw_stdu_crtc_page_flip,
1005 };
1006 
1007 
1008 
1009 /******************************************************************************
1010  * Screen Target Display Unit Encoder Functions
1011  *****************************************************************************/
1012 
1013 /**
1014  * vmw_stdu_encoder_destroy - cleans up the STDU
1015  *
1016  * @encoder: used the get the containing STDU
1017  *
1018  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
1019  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
1020  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
1021  * get called.
1022  */
1023 static void vmw_stdu_encoder_destroy(struct drm_encoder *encoder)
1024 {
1025 	vmw_stdu_destroy(vmw_encoder_to_stdu(encoder));
1026 }
1027 
1028 static const struct drm_encoder_funcs vmw_stdu_encoder_funcs = {
1029 	.destroy = vmw_stdu_encoder_destroy,
1030 };
1031 
1032 
1033 
1034 /******************************************************************************
1035  * Screen Target Display Unit Connector Functions
1036  *****************************************************************************/
1037 
1038 /**
1039  * vmw_stdu_connector_destroy - cleans up the STDU
1040  *
1041  * @connector: used to get the containing STDU
1042  *
1043  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
1044  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
1045  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
1046  * get called.
1047  */
1048 static void vmw_stdu_connector_destroy(struct drm_connector *connector)
1049 {
1050 	vmw_stdu_destroy(vmw_connector_to_stdu(connector));
1051 }
1052 
1053 
1054 
1055 static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
1056 	.dpms = vmw_du_connector_dpms,
1057 	.detect = vmw_du_connector_detect,
1058 	.fill_modes = vmw_du_connector_fill_modes,
1059 	.set_property = vmw_du_connector_set_property,
1060 	.destroy = vmw_stdu_connector_destroy,
1061 	.reset = vmw_du_connector_reset,
1062 	.atomic_duplicate_state = vmw_du_connector_duplicate_state,
1063 	.atomic_destroy_state = vmw_du_connector_destroy_state,
1064 	.atomic_set_property = vmw_du_connector_atomic_set_property,
1065 	.atomic_get_property = vmw_du_connector_atomic_get_property,
1066 };
1067 
1068 
1069 static const struct
1070 drm_connector_helper_funcs vmw_stdu_connector_helper_funcs = {
1071 	.best_encoder = drm_atomic_helper_best_encoder,
1072 };
1073 
1074 
1075 
1076 /******************************************************************************
1077  * Screen Target Display Plane Functions
1078  *****************************************************************************/
1079 
1080 
1081 
1082 /**
1083  * vmw_stdu_primary_plane_cleanup_fb - Unpins the display surface
1084  *
1085  * @plane:  display plane
1086  * @old_state: Contains the FB to clean up
1087  *
1088  * Unpins the display surface
1089  *
1090  * Returns 0 on success
1091  */
1092 static void
1093 vmw_stdu_primary_plane_cleanup_fb(struct drm_plane *plane,
1094 				  struct drm_plane_state *old_state)
1095 {
1096 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(old_state);
1097 
1098 	if (vps->guest_map.virtual)
1099 		ttm_bo_kunmap(&vps->guest_map);
1100 
1101 	if (vps->host_map.virtual)
1102 		ttm_bo_kunmap(&vps->host_map);
1103 
1104 	if (vps->surf)
1105 		WARN_ON(!vps->pinned);
1106 
1107 	vmw_du_plane_cleanup_fb(plane, old_state);
1108 
1109 	vps->content_fb_type = SAME_AS_DISPLAY;
1110 	vps->cpp = 0;
1111 }
1112 
1113 
1114 
1115 /**
1116  * vmw_stdu_primary_plane_prepare_fb - Readies the display surface
1117  *
1118  * @plane:  display plane
1119  * @new_state: info on the new plane state, including the FB
1120  *
1121  * This function allocates a new display surface if the content is
1122  * backed by a DMA.  The display surface is pinned here, and it'll
1123  * be unpinned in .cleanup_fb()
1124  *
1125  * Returns 0 on success
1126  */
1127 static int
1128 vmw_stdu_primary_plane_prepare_fb(struct drm_plane *plane,
1129 				  struct drm_plane_state *new_state)
1130 {
1131 	struct vmw_private *dev_priv = vmw_priv(plane->dev);
1132 	struct drm_framebuffer *new_fb = new_state->fb;
1133 	struct vmw_framebuffer *vfb;
1134 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
1135 	enum stdu_content_type new_content_type;
1136 	struct vmw_framebuffer_surface *new_vfbs;
1137 	struct drm_crtc *crtc = new_state->crtc;
1138 	uint32_t hdisplay = new_state->crtc_w, vdisplay = new_state->crtc_h;
1139 	int ret;
1140 
1141 	/* No FB to prepare */
1142 	if (!new_fb) {
1143 		if (vps->surf) {
1144 			WARN_ON(vps->pinned != 0);
1145 			vmw_surface_unreference(&vps->surf);
1146 		}
1147 
1148 		return 0;
1149 	}
1150 
1151 	vfb = vmw_framebuffer_to_vfb(new_fb);
1152 	new_vfbs = (vfb->dmabuf) ? NULL : vmw_framebuffer_to_vfbs(new_fb);
1153 
1154 	if (new_vfbs && new_vfbs->surface->base_size.width == hdisplay &&
1155 	    new_vfbs->surface->base_size.height == vdisplay)
1156 		new_content_type = SAME_AS_DISPLAY;
1157 	else if (vfb->dmabuf)
1158 		new_content_type = SEPARATE_DMA;
1159 	else
1160 		new_content_type = SEPARATE_SURFACE;
1161 
1162 	if (new_content_type != SAME_AS_DISPLAY) {
1163 		struct vmw_surface content_srf;
1164 		struct drm_vmw_size display_base_size = {0};
1165 
1166 		display_base_size.width  = hdisplay;
1167 		display_base_size.height = vdisplay;
1168 		display_base_size.depth  = 1;
1169 
1170 		/*
1171 		 * If content buffer is a DMA buf, then we have to construct
1172 		 * surface info
1173 		 */
1174 		if (new_content_type == SEPARATE_DMA) {
1175 
1176 			switch (new_fb->format->cpp[0]*8) {
1177 			case 32:
1178 				content_srf.format = SVGA3D_X8R8G8B8;
1179 				break;
1180 
1181 			case 16:
1182 				content_srf.format = SVGA3D_R5G6B5;
1183 				break;
1184 
1185 			case 8:
1186 				content_srf.format = SVGA3D_P8;
1187 				break;
1188 
1189 			default:
1190 				DRM_ERROR("Invalid format\n");
1191 				return -EINVAL;
1192 			}
1193 
1194 			content_srf.flags             = 0;
1195 			content_srf.mip_levels[0]     = 1;
1196 			content_srf.multisample_count = 0;
1197 		} else {
1198 			content_srf = *new_vfbs->surface;
1199 		}
1200 
1201 		if (vps->surf) {
1202 			struct drm_vmw_size cur_base_size = vps->surf->base_size;
1203 
1204 			if (cur_base_size.width != display_base_size.width ||
1205 			    cur_base_size.height != display_base_size.height ||
1206 			    vps->surf->format != content_srf.format) {
1207 				WARN_ON(vps->pinned != 0);
1208 				vmw_surface_unreference(&vps->surf);
1209 			}
1210 
1211 		}
1212 
1213 		if (!vps->surf) {
1214 			ret = vmw_surface_gb_priv_define
1215 				(crtc->dev,
1216 				 /* Kernel visible only */
1217 				 0,
1218 				 content_srf.flags,
1219 				 content_srf.format,
1220 				 true,  /* a scanout buffer */
1221 				 content_srf.mip_levels[0],
1222 				 content_srf.multisample_count,
1223 				 0,
1224 				 display_base_size,
1225 				 &vps->surf);
1226 			if (ret != 0) {
1227 				DRM_ERROR("Couldn't allocate STDU surface.\n");
1228 				return ret;
1229 			}
1230 		}
1231 	} else {
1232 		/*
1233 		 * prepare_fb and clean_fb should only take care of pinning
1234 		 * and unpinning.  References are tracked by state objects.
1235 		 * The only time we add a reference in prepare_fb is if the
1236 		 * state object doesn't have a reference to begin with
1237 		 */
1238 		if (vps->surf) {
1239 			WARN_ON(vps->pinned != 0);
1240 			vmw_surface_unreference(&vps->surf);
1241 		}
1242 
1243 		vps->surf = vmw_surface_reference(new_vfbs->surface);
1244 	}
1245 
1246 	if (vps->surf) {
1247 
1248 		/* Pin new surface before flipping */
1249 		ret = vmw_resource_pin(&vps->surf->res, false);
1250 		if (ret)
1251 			goto out_srf_unref;
1252 
1253 		vps->pinned++;
1254 	}
1255 
1256 	vps->content_fb_type = new_content_type;
1257 
1258 	/*
1259 	 * This should only happen if the DMA buf is too large to create a
1260 	 * proxy surface for.
1261 	 * If we are a 2D VM with a DMA buffer then we have to use CPU blit
1262 	 * so cache these mappings
1263 	 */
1264 	if (vps->content_fb_type == SEPARATE_DMA &&
1265 	    !(dev_priv->capabilities & SVGA_CAP_3D)) {
1266 
1267 		struct vmw_framebuffer_dmabuf *new_vfbd;
1268 
1269 		new_vfbd = vmw_framebuffer_to_vfbd(new_fb);
1270 
1271 		ret = ttm_bo_reserve(&new_vfbd->buffer->base, false, false,
1272 				     NULL);
1273 		if (ret)
1274 			goto out_srf_unpin;
1275 
1276 		ret = ttm_bo_kmap(&new_vfbd->buffer->base, 0,
1277 				  new_vfbd->buffer->base.num_pages,
1278 				  &vps->guest_map);
1279 
1280 		ttm_bo_unreserve(&new_vfbd->buffer->base);
1281 
1282 		if (ret) {
1283 			DRM_ERROR("Failed to map content buffer to CPU\n");
1284 			goto out_srf_unpin;
1285 		}
1286 
1287 		ret = ttm_bo_kmap(&vps->surf->res.backup->base, 0,
1288 				  vps->surf->res.backup->base.num_pages,
1289 				  &vps->host_map);
1290 		if (ret) {
1291 			DRM_ERROR("Failed to map display buffer to CPU\n");
1292 			ttm_bo_kunmap(&vps->guest_map);
1293 			goto out_srf_unpin;
1294 		}
1295 
1296 		vps->cpp = new_fb->pitches[0] / new_fb->width;
1297 	}
1298 
1299 	return 0;
1300 
1301 out_srf_unpin:
1302 	vmw_resource_unpin(&vps->surf->res);
1303 	vps->pinned--;
1304 
1305 out_srf_unref:
1306 	vmw_surface_unreference(&vps->surf);
1307 	return ret;
1308 }
1309 
1310 
1311 
1312 /**
1313  * vmw_stdu_primary_plane_atomic_update - formally switches STDU to new plane
1314  *
1315  * @plane: display plane
1316  * @old_state: Only used to get crtc info
1317  *
1318  * Formally update stdu->display_srf to the new plane, and bind the new
1319  * plane STDU.  This function is called during the commit phase when
1320  * all the preparation have been done and all the configurations have
1321  * been checked.
1322  */
1323 static void
1324 vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
1325 				     struct drm_plane_state *old_state)
1326 {
1327 	struct vmw_private *dev_priv;
1328 	struct vmw_screen_target_display_unit *stdu;
1329 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(plane->state);
1330 	struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
1331 	int ret;
1332 
1333 	stdu     = vmw_crtc_to_stdu(crtc);
1334 	dev_priv = vmw_priv(crtc->dev);
1335 
1336 	stdu->display_srf = vps->surf;
1337 	stdu->content_fb_type = vps->content_fb_type;
1338 	stdu->cpp = vps->cpp;
1339 	memcpy(&stdu->guest_map, &vps->guest_map, sizeof(vps->guest_map));
1340 	memcpy(&stdu->host_map, &vps->host_map, sizeof(vps->host_map));
1341 
1342 	if (!stdu->defined)
1343 		return;
1344 
1345 	if (plane->state->fb)
1346 		ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
1347 	else
1348 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
1349 
1350 	/*
1351 	 * We cannot really fail this function, so if we do, then output an
1352 	 * error and quit
1353 	 */
1354 	if (ret)
1355 		DRM_ERROR("Failed to bind surface to STDU.\n");
1356 	else
1357 		crtc->primary->fb = plane->state->fb;
1358 }
1359 
1360 
1361 static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
1362 	.update_plane = drm_atomic_helper_update_plane,
1363 	.disable_plane = drm_atomic_helper_disable_plane,
1364 	.destroy = vmw_du_primary_plane_destroy,
1365 	.reset = vmw_du_plane_reset,
1366 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
1367 	.atomic_destroy_state = vmw_du_plane_destroy_state,
1368 };
1369 
1370 static const struct drm_plane_funcs vmw_stdu_cursor_funcs = {
1371 	.update_plane = drm_atomic_helper_update_plane,
1372 	.disable_plane = drm_atomic_helper_disable_plane,
1373 	.destroy = vmw_du_cursor_plane_destroy,
1374 	.reset = vmw_du_plane_reset,
1375 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
1376 	.atomic_destroy_state = vmw_du_plane_destroy_state,
1377 };
1378 
1379 
1380 /*
1381  * Atomic Helpers
1382  */
1383 static const struct
1384 drm_plane_helper_funcs vmw_stdu_cursor_plane_helper_funcs = {
1385 	.atomic_check = vmw_du_cursor_plane_atomic_check,
1386 	.atomic_update = vmw_du_cursor_plane_atomic_update,
1387 	.prepare_fb = vmw_du_cursor_plane_prepare_fb,
1388 	.cleanup_fb = vmw_du_plane_cleanup_fb,
1389 };
1390 
1391 static const struct
1392 drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
1393 	.atomic_check = vmw_du_primary_plane_atomic_check,
1394 	.atomic_update = vmw_stdu_primary_plane_atomic_update,
1395 	.prepare_fb = vmw_stdu_primary_plane_prepare_fb,
1396 	.cleanup_fb = vmw_stdu_primary_plane_cleanup_fb,
1397 };
1398 
1399 static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
1400 	.prepare = vmw_stdu_crtc_helper_prepare,
1401 	.commit = vmw_stdu_crtc_helper_commit,
1402 	.disable = vmw_stdu_crtc_helper_disable,
1403 	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
1404 	.atomic_check = vmw_du_crtc_atomic_check,
1405 	.atomic_begin = vmw_du_crtc_atomic_begin,
1406 	.atomic_flush = vmw_du_crtc_atomic_flush,
1407 };
1408 
1409 
1410 /**
1411  * vmw_stdu_init - Sets up a Screen Target Display Unit
1412  *
1413  * @dev_priv: VMW DRM device
1414  * @unit: unit number range from 0 to VMWGFX_NUM_DISPLAY_UNITS
1415  *
1416  * This function is called once per CRTC, and allocates one Screen Target
1417  * display unit to represent that CRTC.  Since the SVGA device does not separate
1418  * out encoder and connector, they are represented as part of the STDU as well.
1419  */
1420 static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
1421 {
1422 	struct vmw_screen_target_display_unit *stdu;
1423 	struct drm_device *dev = dev_priv->dev;
1424 	struct drm_connector *connector;
1425 	struct drm_encoder *encoder;
1426 	struct drm_plane *primary, *cursor;
1427 	struct drm_crtc *crtc;
1428 	int    ret;
1429 
1430 
1431 	stdu = kzalloc(sizeof(*stdu), GFP_KERNEL);
1432 	if (!stdu)
1433 		return -ENOMEM;
1434 
1435 	stdu->base.unit = unit;
1436 	crtc = &stdu->base.crtc;
1437 	encoder = &stdu->base.encoder;
1438 	connector = &stdu->base.connector;
1439 	primary = &stdu->base.primary;
1440 	cursor = &stdu->base.cursor;
1441 
1442 	stdu->base.pref_active = (unit == 0);
1443 	stdu->base.pref_width  = dev_priv->initial_width;
1444 	stdu->base.pref_height = dev_priv->initial_height;
1445 
1446 	/*
1447 	 * Remove this after enabling atomic because property values can
1448 	 * only exist in a state object
1449 	 */
1450 	stdu->base.is_implicit = false;
1451 
1452 	/* Initialize primary plane */
1453 	vmw_du_plane_reset(primary);
1454 
1455 	ret = drm_universal_plane_init(dev, primary,
1456 				       0, &vmw_stdu_plane_funcs,
1457 				       vmw_primary_plane_formats,
1458 				       ARRAY_SIZE(vmw_primary_plane_formats),
1459 				       DRM_PLANE_TYPE_PRIMARY, NULL);
1460 	if (ret) {
1461 		DRM_ERROR("Failed to initialize primary plane");
1462 		goto err_free;
1463 	}
1464 
1465 	drm_plane_helper_add(primary, &vmw_stdu_primary_plane_helper_funcs);
1466 
1467 	/* Initialize cursor plane */
1468 	vmw_du_plane_reset(cursor);
1469 
1470 	ret = drm_universal_plane_init(dev, cursor,
1471 			0, &vmw_stdu_cursor_funcs,
1472 			vmw_cursor_plane_formats,
1473 			ARRAY_SIZE(vmw_cursor_plane_formats),
1474 			DRM_PLANE_TYPE_CURSOR, NULL);
1475 	if (ret) {
1476 		DRM_ERROR("Failed to initialize cursor plane");
1477 		drm_plane_cleanup(&stdu->base.primary);
1478 		goto err_free;
1479 	}
1480 
1481 	drm_plane_helper_add(cursor, &vmw_stdu_cursor_plane_helper_funcs);
1482 
1483 	vmw_du_connector_reset(connector);
1484 
1485 	ret = drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
1486 				 DRM_MODE_CONNECTOR_VIRTUAL);
1487 	if (ret) {
1488 		DRM_ERROR("Failed to initialize connector\n");
1489 		goto err_free;
1490 	}
1491 
1492 	drm_connector_helper_add(connector, &vmw_stdu_connector_helper_funcs);
1493 	connector->status = vmw_du_connector_detect(connector, false);
1494 	vmw_connector_state_to_vcs(connector->state)->is_implicit = false;
1495 
1496 	ret = drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
1497 			       DRM_MODE_ENCODER_VIRTUAL, NULL);
1498 	if (ret) {
1499 		DRM_ERROR("Failed to initialize encoder\n");
1500 		goto err_free_connector;
1501 	}
1502 
1503 	(void) drm_mode_connector_attach_encoder(connector, encoder);
1504 	encoder->possible_crtcs = (1 << unit);
1505 	encoder->possible_clones = 0;
1506 
1507 	ret = drm_connector_register(connector);
1508 	if (ret) {
1509 		DRM_ERROR("Failed to register connector\n");
1510 		goto err_free_encoder;
1511 	}
1512 
1513 	vmw_du_crtc_reset(crtc);
1514 	ret = drm_crtc_init_with_planes(dev, crtc, &stdu->base.primary,
1515 					&stdu->base.cursor,
1516 					&vmw_stdu_crtc_funcs, NULL);
1517 	if (ret) {
1518 		DRM_ERROR("Failed to initialize CRTC\n");
1519 		goto err_free_unregister;
1520 	}
1521 
1522 	drm_crtc_helper_add(crtc, &vmw_stdu_crtc_helper_funcs);
1523 
1524 	drm_mode_crtc_set_gamma_size(crtc, 256);
1525 
1526 	drm_object_attach_property(&connector->base,
1527 				   dev_priv->hotplug_mode_update_property, 1);
1528 	drm_object_attach_property(&connector->base,
1529 				   dev->mode_config.suggested_x_property, 0);
1530 	drm_object_attach_property(&connector->base,
1531 				   dev->mode_config.suggested_y_property, 0);
1532 	if (dev_priv->implicit_placement_property)
1533 		drm_object_attach_property
1534 			(&connector->base,
1535 			 dev_priv->implicit_placement_property,
1536 			 stdu->base.is_implicit);
1537 	return 0;
1538 
1539 err_free_unregister:
1540 	drm_connector_unregister(connector);
1541 err_free_encoder:
1542 	drm_encoder_cleanup(encoder);
1543 err_free_connector:
1544 	drm_connector_cleanup(connector);
1545 err_free:
1546 	kfree(stdu);
1547 	return ret;
1548 }
1549 
1550 
1551 
1552 /**
1553  *  vmw_stdu_destroy - Cleans up a vmw_screen_target_display_unit
1554  *
1555  *  @stdu:  Screen Target Display Unit to be destroyed
1556  *
1557  *  Clean up after vmw_stdu_init
1558  */
1559 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu)
1560 {
1561 	vmw_du_cleanup(&stdu->base);
1562 	kfree(stdu);
1563 }
1564 
1565 
1566 
1567 /******************************************************************************
1568  * Screen Target Display KMS Functions
1569  *
1570  * These functions are called by the common KMS code in vmwgfx_kms.c
1571  *****************************************************************************/
1572 
1573 /**
1574  * vmw_kms_stdu_init_display - Initializes a Screen Target based display
1575  *
1576  * @dev_priv: VMW DRM device
1577  *
1578  * This function initialize a Screen Target based display device.  It checks
1579  * the capability bits to make sure the underlying hardware can support
1580  * screen targets, and then creates the maximum number of CRTCs, a.k.a Display
1581  * Units, as supported by the display hardware.
1582  *
1583  * RETURNS:
1584  * 0 on success, error code otherwise
1585  */
1586 int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
1587 {
1588 	struct drm_device *dev = dev_priv->dev;
1589 	int i, ret;
1590 
1591 
1592 	/* Do nothing if Screen Target support is turned off */
1593 	if (!VMWGFX_ENABLE_SCREEN_TARGET_OTABLE)
1594 		return -ENOSYS;
1595 
1596 	if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
1597 		return -ENOSYS;
1598 
1599 	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
1600 	if (unlikely(ret != 0))
1601 		return ret;
1602 
1603 	dev_priv->active_display_unit = vmw_du_screen_target;
1604 
1605 	if (dev_priv->capabilities & SVGA_CAP_3D) {
1606 		/*
1607 		 * For 3D VMs, display (scanout) buffer size is the smaller of
1608 		 * max texture and max STDU
1609 		 */
1610 		uint32_t max_width, max_height;
1611 
1612 		max_width = min(dev_priv->texture_max_width,
1613 				dev_priv->stdu_max_width);
1614 		max_height = min(dev_priv->texture_max_height,
1615 				 dev_priv->stdu_max_height);
1616 
1617 		dev->mode_config.max_width = max_width;
1618 		dev->mode_config.max_height = max_height;
1619 	} else {
1620 		/*
1621 		 * Given various display aspect ratios, there's no way to
1622 		 * estimate these using prim_bb_mem.  So just set these to
1623 		 * something arbitrarily large and we will reject any layout
1624 		 * that doesn't fit prim_bb_mem later
1625 		 */
1626 		dev->mode_config.max_width = 16384;
1627 		dev->mode_config.max_height = 16384;
1628 	}
1629 
1630 	vmw_kms_create_implicit_placement_property(dev_priv, false);
1631 
1632 	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
1633 		ret = vmw_stdu_init(dev_priv, i);
1634 
1635 		if (unlikely(ret != 0)) {
1636 			DRM_ERROR("Failed to initialize STDU %d", i);
1637 			goto err_vblank_cleanup;
1638 		}
1639 	}
1640 
1641 	DRM_INFO("Screen Target Display device initialized\n");
1642 
1643 	return 0;
1644 
1645 err_vblank_cleanup:
1646 	drm_vblank_cleanup(dev);
1647 	return ret;
1648 }
1649 
1650 
1651 
1652 /**
1653  * vmw_kms_stdu_close_display - Cleans up after vmw_kms_stdu_init_display
1654  *
1655  * @dev_priv: VMW DRM device
1656  *
1657  * Frees up any resources allocated by vmw_kms_stdu_init_display
1658  *
1659  * RETURNS:
1660  * 0 on success
1661  */
1662 int vmw_kms_stdu_close_display(struct vmw_private *dev_priv)
1663 {
1664 	struct drm_device *dev = dev_priv->dev;
1665 
1666 	drm_vblank_cleanup(dev);
1667 
1668 	return 0;
1669 }
1670