1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /******************************************************************************
3  *
4  * COPYRIGHT (C) 2014-2023 VMware, Inc., Palo Alto, CA., USA
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
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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,
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26  ******************************************************************************/
27 
28 #include "vmwgfx_bo.h"
29 #include "vmwgfx_kms.h"
30 #include "vmw_surface_cache.h"
31 
32 #include <drm/drm_atomic.h>
33 #include <drm/drm_atomic_helper.h>
34 #include <drm/drm_damage_helper.h>
35 #include <drm/drm_fourcc.h>
36 
37 #define vmw_crtc_to_stdu(x) \
38 	container_of(x, struct vmw_screen_target_display_unit, base.crtc)
39 #define vmw_encoder_to_stdu(x) \
40 	container_of(x, struct vmw_screen_target_display_unit, base.encoder)
41 #define vmw_connector_to_stdu(x) \
42 	container_of(x, struct vmw_screen_target_display_unit, base.connector)
43 
44 /*
45  * Some renderers such as llvmpipe will align the width and height of their
46  * buffers to match their tile size. We need to keep this in mind when exposing
47  * modes to userspace so that this possible over-allocation will not exceed
48  * graphics memory. 64x64 pixels seems to be a reasonable upper bound for the
49  * tile size of current renderers.
50  */
51 #define GPU_TILE_SIZE 64
52 
53 enum stdu_content_type {
54 	SAME_AS_DISPLAY = 0,
55 	SEPARATE_SURFACE,
56 	SEPARATE_BO
57 };
58 
59 /**
60  * struct vmw_stdu_dirty - closure structure for the update functions
61  *
62  * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
63  * @transfer: Transfer direction for DMA command.
64  * @left: Left side of bounding box.
65  * @right: Right side of bounding box.
66  * @top: Top side of bounding box.
67  * @bottom: Bottom side of bounding box.
68  * @fb_left: Left side of the framebuffer/content bounding box
69  * @fb_top: Top of the framebuffer/content bounding box
70  * @pitch: framebuffer pitch (stride)
71  * @buf: buffer object when DMA-ing between buffer and screen targets.
72  * @sid: Surface ID when copying between surface and screen targets.
73  */
74 struct vmw_stdu_dirty {
75 	struct vmw_kms_dirty base;
76 	s32 left, right, top, bottom;
77 	s32 fb_left, fb_top;
78 	u32 pitch;
79 	union {
80 		struct vmw_bo *buf;
81 		u32 sid;
82 	};
83 };
84 
85 /*
86  * SVGA commands that are used by this code. Please see the device headers
87  * for explanation.
88  */
89 struct vmw_stdu_update {
90 	SVGA3dCmdHeader header;
91 	SVGA3dCmdUpdateGBScreenTarget body;
92 };
93 
94 struct vmw_stdu_dma {
95 	SVGA3dCmdHeader     header;
96 	SVGA3dCmdSurfaceDMA body;
97 };
98 
99 struct vmw_stdu_surface_copy {
100 	SVGA3dCmdHeader      header;
101 	SVGA3dCmdSurfaceCopy body;
102 };
103 
104 struct vmw_stdu_update_gb_image {
105 	SVGA3dCmdHeader header;
106 	SVGA3dCmdUpdateGBImage body;
107 };
108 
109 /**
110  * struct vmw_screen_target_display_unit
111  *
112  * @base: VMW specific DU structure
113  * @display_srf: surface to be displayed.  The dimension of this will always
114  *               match the display mode.  If the display mode matches
115  *               content_vfbs dimensions, then this is a pointer into the
116  *               corresponding field in content_vfbs.  If not, then this
117  *               is a separate buffer to which content_vfbs will blit to.
118  * @content_fb_type: content_fb type
119  * @display_width:  display width
120  * @display_height: display height
121  * @defined:     true if the current display unit has been initialized
122  * @cpp:         Bytes per pixel
123  */
124 struct vmw_screen_target_display_unit {
125 	struct vmw_display_unit base;
126 	struct vmw_surface *display_srf;
127 	enum stdu_content_type content_fb_type;
128 	s32 display_width, display_height;
129 
130 	bool defined;
131 
132 	/* For CPU Blit */
133 	unsigned int cpp;
134 };
135 
136 
137 
138 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu);
139 
140 
141 
142 /******************************************************************************
143  * Screen Target Display Unit CRTC Functions
144  *****************************************************************************/
145 
146 /**
147  * vmw_stdu_crtc_destroy - cleans up the STDU
148  *
149  * @crtc: used to get a reference to the containing STDU
150  */
vmw_stdu_crtc_destroy(struct drm_crtc * crtc)151 static void vmw_stdu_crtc_destroy(struct drm_crtc *crtc)
152 {
153 	vmw_stdu_destroy(vmw_crtc_to_stdu(crtc));
154 }
155 
156 /**
157  * vmw_stdu_define_st - Defines a Screen Target
158  *
159  * @dev_priv:  VMW DRM device
160  * @stdu: display unit to create a Screen Target for
161  * @mode: The mode to set.
162  * @crtc_x: X coordinate of screen target relative to framebuffer origin.
163  * @crtc_y: Y coordinate of screen target relative to framebuffer origin.
164  *
165  * Creates a STDU that we can used later.  This function is called whenever the
166  * framebuffer size changes.
167  *
168  * RETURNs:
169  * 0 on success, error code on failure
170  */
vmw_stdu_define_st(struct vmw_private * dev_priv,struct vmw_screen_target_display_unit * stdu,struct drm_display_mode * mode,int crtc_x,int crtc_y)171 static int vmw_stdu_define_st(struct vmw_private *dev_priv,
172 			      struct vmw_screen_target_display_unit *stdu,
173 			      struct drm_display_mode *mode,
174 			      int crtc_x, int crtc_y)
175 {
176 	struct {
177 		SVGA3dCmdHeader header;
178 		SVGA3dCmdDefineGBScreenTarget body;
179 	} *cmd;
180 
181 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
182 	if (unlikely(cmd == NULL))
183 		return -ENOMEM;
184 
185 	cmd->header.id   = SVGA_3D_CMD_DEFINE_GB_SCREENTARGET;
186 	cmd->header.size = sizeof(cmd->body);
187 
188 	cmd->body.stid   = stdu->base.unit;
189 	cmd->body.width  = mode->hdisplay;
190 	cmd->body.height = mode->vdisplay;
191 	cmd->body.flags  = (0 == cmd->body.stid) ? SVGA_STFLAG_PRIMARY : 0;
192 	cmd->body.dpi    = 0;
193 	cmd->body.xRoot  = crtc_x;
194 	cmd->body.yRoot  = crtc_y;
195 
196 	stdu->base.set_gui_x = cmd->body.xRoot;
197 	stdu->base.set_gui_y = cmd->body.yRoot;
198 
199 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
200 
201 	stdu->defined = true;
202 	stdu->display_width  = mode->hdisplay;
203 	stdu->display_height = mode->vdisplay;
204 
205 	return 0;
206 }
207 
208 
209 
210 /**
211  * vmw_stdu_bind_st - Binds a surface to a Screen Target
212  *
213  * @dev_priv: VMW DRM device
214  * @stdu: display unit affected
215  * @res: Buffer to bind to the screen target.  Set to NULL to blank screen.
216  *
217  * Binding a surface to a Screen Target the same as flipping
218  */
vmw_stdu_bind_st(struct vmw_private * dev_priv,struct vmw_screen_target_display_unit * stdu,const struct vmw_resource * res)219 static int vmw_stdu_bind_st(struct vmw_private *dev_priv,
220 			    struct vmw_screen_target_display_unit *stdu,
221 			    const struct vmw_resource *res)
222 {
223 	SVGA3dSurfaceImageId image;
224 
225 	struct {
226 		SVGA3dCmdHeader header;
227 		SVGA3dCmdBindGBScreenTarget body;
228 	} *cmd;
229 
230 
231 	if (!stdu->defined) {
232 		DRM_ERROR("No screen target defined\n");
233 		return -EINVAL;
234 	}
235 
236 	/* Set up image using information in vfb */
237 	memset(&image, 0, sizeof(image));
238 	image.sid = res ? res->id : SVGA3D_INVALID_ID;
239 
240 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
241 	if (unlikely(cmd == NULL))
242 		return -ENOMEM;
243 
244 	cmd->header.id   = SVGA_3D_CMD_BIND_GB_SCREENTARGET;
245 	cmd->header.size = sizeof(cmd->body);
246 
247 	cmd->body.stid   = stdu->base.unit;
248 	cmd->body.image  = image;
249 
250 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
251 
252 	return 0;
253 }
254 
255 /**
256  * vmw_stdu_populate_update - populate an UPDATE_GB_SCREENTARGET command with a
257  * bounding box.
258  *
259  * @cmd: Pointer to command stream.
260  * @unit: Screen target unit.
261  * @left: Left side of bounding box.
262  * @right: Right side of bounding box.
263  * @top: Top side of bounding box.
264  * @bottom: Bottom side of bounding box.
265  */
vmw_stdu_populate_update(void * cmd,int unit,s32 left,s32 right,s32 top,s32 bottom)266 static void vmw_stdu_populate_update(void *cmd, int unit,
267 				     s32 left, s32 right, s32 top, s32 bottom)
268 {
269 	struct vmw_stdu_update *update = cmd;
270 
271 	update->header.id   = SVGA_3D_CMD_UPDATE_GB_SCREENTARGET;
272 	update->header.size = sizeof(update->body);
273 
274 	update->body.stid   = unit;
275 	update->body.rect.x = left;
276 	update->body.rect.y = top;
277 	update->body.rect.w = right - left;
278 	update->body.rect.h = bottom - top;
279 }
280 
281 /**
282  * vmw_stdu_update_st - Full update of a Screen Target
283  *
284  * @dev_priv: VMW DRM device
285  * @stdu: display unit affected
286  *
287  * This function needs to be called whenever the content of a screen
288  * target has changed completely. Typically as a result of a backing
289  * surface change.
290  *
291  * RETURNS:
292  * 0 on success, error code on failure
293  */
vmw_stdu_update_st(struct vmw_private * dev_priv,struct vmw_screen_target_display_unit * stdu)294 static int vmw_stdu_update_st(struct vmw_private *dev_priv,
295 			      struct vmw_screen_target_display_unit *stdu)
296 {
297 	struct vmw_stdu_update *cmd;
298 
299 	if (!stdu->defined) {
300 		DRM_ERROR("No screen target defined");
301 		return -EINVAL;
302 	}
303 
304 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
305 	if (unlikely(cmd == NULL))
306 		return -ENOMEM;
307 
308 	vmw_stdu_populate_update(cmd, stdu->base.unit,
309 				 0, stdu->display_width,
310 				 0, stdu->display_height);
311 
312 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
313 
314 	return 0;
315 }
316 
317 
318 
319 /**
320  * vmw_stdu_destroy_st - Destroy a Screen Target
321  *
322  * @dev_priv:  VMW DRM device
323  * @stdu: display unit to destroy
324  */
vmw_stdu_destroy_st(struct vmw_private * dev_priv,struct vmw_screen_target_display_unit * stdu)325 static int vmw_stdu_destroy_st(struct vmw_private *dev_priv,
326 			       struct vmw_screen_target_display_unit *stdu)
327 {
328 	int    ret;
329 
330 	struct {
331 		SVGA3dCmdHeader header;
332 		SVGA3dCmdDestroyGBScreenTarget body;
333 	} *cmd;
334 
335 
336 	/* Nothing to do if not successfully defined */
337 	if (unlikely(!stdu->defined))
338 		return 0;
339 
340 	cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
341 	if (unlikely(cmd == NULL))
342 		return -ENOMEM;
343 
344 	cmd->header.id   = SVGA_3D_CMD_DESTROY_GB_SCREENTARGET;
345 	cmd->header.size = sizeof(cmd->body);
346 
347 	cmd->body.stid   = stdu->base.unit;
348 
349 	vmw_cmd_commit(dev_priv, sizeof(*cmd));
350 
351 	/* Force sync */
352 	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
353 	if (unlikely(ret != 0))
354 		DRM_ERROR("Failed to sync with HW");
355 
356 	stdu->defined = false;
357 	stdu->display_width  = 0;
358 	stdu->display_height = 0;
359 
360 	return ret;
361 }
362 
363 
364 /**
365  * vmw_stdu_crtc_mode_set_nofb - Updates screen target size
366  *
367  * @crtc: CRTC associated with the screen target
368  *
369  * This function defines/destroys a screen target
370  *
371  */
vmw_stdu_crtc_mode_set_nofb(struct drm_crtc * crtc)372 static void vmw_stdu_crtc_mode_set_nofb(struct drm_crtc *crtc)
373 {
374 	struct vmw_private *dev_priv;
375 	struct vmw_screen_target_display_unit *stdu;
376 	struct drm_connector_state *conn_state;
377 	struct vmw_connector_state *vmw_conn_state;
378 	int x, y, ret;
379 
380 	stdu = vmw_crtc_to_stdu(crtc);
381 	dev_priv = vmw_priv(crtc->dev);
382 	conn_state = stdu->base.connector.state;
383 	vmw_conn_state = vmw_connector_state_to_vcs(conn_state);
384 
385 	if (stdu->defined) {
386 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
387 		if (ret)
388 			DRM_ERROR("Failed to blank CRTC\n");
389 
390 		(void) vmw_stdu_update_st(dev_priv, stdu);
391 
392 		ret = vmw_stdu_destroy_st(dev_priv, stdu);
393 		if (ret)
394 			DRM_ERROR("Failed to destroy Screen Target\n");
395 
396 		stdu->content_fb_type = SAME_AS_DISPLAY;
397 	}
398 
399 	if (!crtc->state->enable)
400 		return;
401 
402 	x = vmw_conn_state->gui_x;
403 	y = vmw_conn_state->gui_y;
404 
405 	vmw_svga_enable(dev_priv);
406 	ret = vmw_stdu_define_st(dev_priv, stdu, &crtc->mode, x, y);
407 
408 	if (ret)
409 		DRM_ERROR("Failed to define Screen Target of size %dx%d\n",
410 			  crtc->x, crtc->y);
411 }
412 
413 
vmw_stdu_crtc_helper_prepare(struct drm_crtc * crtc)414 static void vmw_stdu_crtc_helper_prepare(struct drm_crtc *crtc)
415 {
416 }
417 
vmw_stdu_crtc_atomic_enable(struct drm_crtc * crtc,struct drm_atomic_state * state)418 static void vmw_stdu_crtc_atomic_enable(struct drm_crtc *crtc,
419 					struct drm_atomic_state *state)
420 {
421 }
422 
vmw_stdu_crtc_atomic_disable(struct drm_crtc * crtc,struct drm_atomic_state * state)423 static void vmw_stdu_crtc_atomic_disable(struct drm_crtc *crtc,
424 					 struct drm_atomic_state *state)
425 {
426 	struct vmw_private *dev_priv;
427 	struct vmw_screen_target_display_unit *stdu;
428 	int ret;
429 
430 
431 	if (!crtc) {
432 		DRM_ERROR("CRTC is NULL\n");
433 		return;
434 	}
435 
436 	stdu     = vmw_crtc_to_stdu(crtc);
437 	dev_priv = vmw_priv(crtc->dev);
438 
439 	if (stdu->defined) {
440 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
441 		if (ret)
442 			DRM_ERROR("Failed to blank CRTC\n");
443 
444 		(void) vmw_stdu_update_st(dev_priv, stdu);
445 
446 		ret = vmw_stdu_destroy_st(dev_priv, stdu);
447 		if (ret)
448 			DRM_ERROR("Failed to destroy Screen Target\n");
449 
450 		stdu->content_fb_type = SAME_AS_DISPLAY;
451 	}
452 }
453 
454 /**
455  * vmw_stdu_bo_cpu_clip - Callback to encode a CPU blit
456  *
457  * @dirty: The closure structure.
458  *
459  * This function calculates the bounding box for all the incoming clips.
460  */
vmw_stdu_bo_cpu_clip(struct vmw_kms_dirty * dirty)461 static void vmw_stdu_bo_cpu_clip(struct vmw_kms_dirty *dirty)
462 {
463 	struct vmw_stdu_dirty *ddirty =
464 		container_of(dirty, struct vmw_stdu_dirty, base);
465 
466 	dirty->num_hits = 1;
467 
468 	/* Calculate destination bounding box */
469 	ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
470 	ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
471 	ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
472 	ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
473 
474 	/*
475 	 * Calculate content bounding box.  We only need the top-left
476 	 * coordinate because width and height will be the same as the
477 	 * destination bounding box above
478 	 */
479 	ddirty->fb_left = min_t(s32, ddirty->fb_left, dirty->fb_x);
480 	ddirty->fb_top  = min_t(s32, ddirty->fb_top, dirty->fb_y);
481 }
482 
483 
484 /**
485  * vmw_stdu_bo_cpu_commit - Callback to do a CPU blit from buffer object
486  *
487  * @dirty: The closure structure.
488  *
489  * For the special case when we cannot create a proxy surface in a
490  * 2D VM, we have to do a CPU blit ourselves.
491  */
vmw_stdu_bo_cpu_commit(struct vmw_kms_dirty * dirty)492 static void vmw_stdu_bo_cpu_commit(struct vmw_kms_dirty *dirty)
493 {
494 	struct vmw_stdu_dirty *ddirty =
495 		container_of(dirty, struct vmw_stdu_dirty, base);
496 	struct vmw_screen_target_display_unit *stdu =
497 		container_of(dirty->unit, typeof(*stdu), base);
498 	s32 width, height;
499 	s32 src_pitch, dst_pitch;
500 	struct vmw_bo *src_bo, *dst_bo;
501 	u32 src_offset, dst_offset;
502 	struct vmw_diff_cpy diff = VMW_CPU_BLIT_DIFF_INITIALIZER(stdu->cpp);
503 
504 	if (!dirty->num_hits)
505 		return;
506 
507 	width = ddirty->right - ddirty->left;
508 	height = ddirty->bottom - ddirty->top;
509 
510 	if (width == 0 || height == 0)
511 		return;
512 
513 	/* Assume we are blitting from Guest (bo) to Host (display_srf) */
514 	src_pitch = stdu->display_srf->metadata.base_size.width * stdu->cpp;
515 	src_bo = stdu->display_srf->res.guest_memory_bo;
516 	src_offset = ddirty->top * src_pitch + ddirty->left * stdu->cpp;
517 
518 	dst_pitch = ddirty->pitch;
519 	dst_bo = ddirty->buf;
520 	dst_offset = ddirty->fb_top * dst_pitch + ddirty->fb_left * stdu->cpp;
521 
522 	(void) vmw_bo_cpu_blit(dst_bo, dst_offset, dst_pitch,
523 			       src_bo, src_offset, src_pitch,
524 			       width * stdu->cpp, height, &diff);
525 }
526 
527 /**
528  * vmw_kms_stdu_readback - Perform a readback from a buffer-object backed
529  * framebuffer and the screen target system.
530  *
531  * @dev_priv: Pointer to the device private structure.
532  * @file_priv: Pointer to a struct drm-file identifying the caller. May be
533  * set to NULL, but then @user_fence_rep must also be set to NULL.
534  * @vfb: Pointer to the buffer-object backed framebuffer.
535  * @user_fence_rep: User-space provided structure for fence information.
536  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
537  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
538  * be NULL.
539  * @num_clips: Number of clip rects in @clips or @vclips.
540  * @increment: Increment to use when looping over @clips or @vclips.
541  * @crtc: If crtc is passed, perform stdu dma on that crtc only.
542  *
543  * If DMA-ing till the screen target system, the function will also notify
544  * the screen target system that a bounding box of the cliprects has been
545  * updated.
546  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
547  * interrupted.
548  */
vmw_kms_stdu_readback(struct vmw_private * dev_priv,struct drm_file * file_priv,struct vmw_framebuffer * vfb,struct drm_vmw_fence_rep __user * user_fence_rep,struct drm_clip_rect * clips,struct drm_vmw_rect * vclips,uint32_t num_clips,int increment,struct drm_crtc * crtc)549 int vmw_kms_stdu_readback(struct vmw_private *dev_priv,
550 			  struct drm_file *file_priv,
551 			  struct vmw_framebuffer *vfb,
552 			  struct drm_vmw_fence_rep __user *user_fence_rep,
553 			  struct drm_clip_rect *clips,
554 			  struct drm_vmw_rect *vclips,
555 			  uint32_t num_clips,
556 			  int increment,
557 			  struct drm_crtc *crtc)
558 {
559 	struct vmw_bo *buf =
560 		container_of(vfb, struct vmw_framebuffer_bo, base)->buffer;
561 	struct vmw_stdu_dirty ddirty;
562 	int ret;
563 	DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
564 
565 	/*
566 	 * The GMR domain might seem confusing because it might seem like it should
567 	 * never happen with screen targets but e.g. the xorg vmware driver issues
568 	 * CMD_SURFACE_DMA for various pixmap updates which might transition our bo to
569 	 * a GMR. Instead of forcing another transition we can optimize the readback
570 	 * by reading directly from the GMR.
571 	 */
572 	vmw_bo_placement_set(buf,
573 			     VMW_BO_DOMAIN_MOB | VMW_BO_DOMAIN_SYS | VMW_BO_DOMAIN_GMR,
574 			     VMW_BO_DOMAIN_MOB | VMW_BO_DOMAIN_SYS | VMW_BO_DOMAIN_GMR);
575 	ret = vmw_validation_add_bo(&val_ctx, buf);
576 	if (ret)
577 		return ret;
578 
579 	ret = vmw_validation_prepare(&val_ctx, NULL, true);
580 	if (ret)
581 		goto out_unref;
582 
583 	ddirty.left = ddirty.top = S32_MAX;
584 	ddirty.right = ddirty.bottom = S32_MIN;
585 	ddirty.fb_left = ddirty.fb_top = S32_MAX;
586 	ddirty.pitch = vfb->base.pitches[0];
587 	ddirty.buf = buf;
588 
589 	ddirty.base.fifo_commit = vmw_stdu_bo_cpu_commit;
590 	ddirty.base.clip = vmw_stdu_bo_cpu_clip;
591 	ddirty.base.fifo_reserve_size = 0;
592 
593 	ddirty.base.crtc = crtc;
594 
595 	ret = vmw_kms_helper_dirty(dev_priv, vfb, clips, vclips,
596 				   0, 0, num_clips, increment, &ddirty.base);
597 
598 	vmw_kms_helper_validation_finish(dev_priv, file_priv, &val_ctx, NULL,
599 					 user_fence_rep);
600 	return ret;
601 
602 out_unref:
603 	vmw_validation_unref_lists(&val_ctx);
604 	return ret;
605 }
606 
607 /**
608  * vmw_kms_stdu_surface_clip - Callback to encode a surface copy command cliprect
609  *
610  * @dirty: The closure structure.
611  *
612  * Encodes a surface copy command cliprect and updates the bounding box
613  * for the copy.
614  */
vmw_kms_stdu_surface_clip(struct vmw_kms_dirty * dirty)615 static void vmw_kms_stdu_surface_clip(struct vmw_kms_dirty *dirty)
616 {
617 	struct vmw_stdu_dirty *sdirty =
618 		container_of(dirty, struct vmw_stdu_dirty, base);
619 	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
620 	struct vmw_screen_target_display_unit *stdu =
621 		container_of(dirty->unit, typeof(*stdu), base);
622 
623 	if (sdirty->sid != stdu->display_srf->res.id) {
624 		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
625 
626 		blit += dirty->num_hits;
627 		blit->srcx = dirty->fb_x;
628 		blit->srcy = dirty->fb_y;
629 		blit->x = dirty->unit_x1;
630 		blit->y = dirty->unit_y1;
631 		blit->d = 1;
632 		blit->w = dirty->unit_x2 - dirty->unit_x1;
633 		blit->h = dirty->unit_y2 - dirty->unit_y1;
634 	}
635 
636 	dirty->num_hits++;
637 
638 	/* Destination bounding box */
639 	sdirty->left = min_t(s32, sdirty->left, dirty->unit_x1);
640 	sdirty->top = min_t(s32, sdirty->top, dirty->unit_y1);
641 	sdirty->right = max_t(s32, sdirty->right, dirty->unit_x2);
642 	sdirty->bottom = max_t(s32, sdirty->bottom, dirty->unit_y2);
643 }
644 
645 /**
646  * vmw_kms_stdu_surface_fifo_commit - Callback to fill in and submit a surface
647  * copy command.
648  *
649  * @dirty: The closure structure.
650  *
651  * Fills in the missing fields in a surface copy command, and encodes a screen
652  * target update command.
653  */
vmw_kms_stdu_surface_fifo_commit(struct vmw_kms_dirty * dirty)654 static void vmw_kms_stdu_surface_fifo_commit(struct vmw_kms_dirty *dirty)
655 {
656 	struct vmw_stdu_dirty *sdirty =
657 		container_of(dirty, struct vmw_stdu_dirty, base);
658 	struct vmw_screen_target_display_unit *stdu =
659 		container_of(dirty->unit, typeof(*stdu), base);
660 	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
661 	struct vmw_stdu_update *update;
662 	size_t blit_size = sizeof(SVGA3dCopyBox) * dirty->num_hits;
663 	size_t commit_size;
664 
665 	if (!dirty->num_hits) {
666 		vmw_cmd_commit(dirty->dev_priv, 0);
667 		return;
668 	}
669 
670 	if (sdirty->sid != stdu->display_srf->res.id) {
671 		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
672 
673 		cmd->header.id = SVGA_3D_CMD_SURFACE_COPY;
674 		cmd->header.size = sizeof(cmd->body) + blit_size;
675 		cmd->body.src.sid = sdirty->sid;
676 		cmd->body.dest.sid = stdu->display_srf->res.id;
677 		update = (struct vmw_stdu_update *) &blit[dirty->num_hits];
678 		commit_size = sizeof(*cmd) + blit_size + sizeof(*update);
679 		stdu->display_srf->res.res_dirty = true;
680 	} else {
681 		update = dirty->cmd;
682 		commit_size = sizeof(*update);
683 	}
684 
685 	vmw_stdu_populate_update(update, stdu->base.unit, sdirty->left,
686 				 sdirty->right, sdirty->top, sdirty->bottom);
687 
688 	vmw_cmd_commit(dirty->dev_priv, commit_size);
689 
690 	sdirty->left = sdirty->top = S32_MAX;
691 	sdirty->right = sdirty->bottom = S32_MIN;
692 }
693 
694 /**
695  * vmw_kms_stdu_surface_dirty - Dirty part of a surface backed framebuffer
696  *
697  * @dev_priv: Pointer to the device private structure.
698  * @framebuffer: Pointer to the surface-buffer backed framebuffer.
699  * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
700  * @vclips: Alternate array of clip rects. Either @clips or @vclips must
701  * be NULL.
702  * @srf: Pointer to surface to blit from. If NULL, the surface attached
703  * to @framebuffer will be used.
704  * @dest_x: X coordinate offset to align @srf with framebuffer coordinates.
705  * @dest_y: Y coordinate offset to align @srf with framebuffer coordinates.
706  * @num_clips: Number of clip rects in @clips.
707  * @inc: Increment to use when looping over @clips.
708  * @out_fence: If non-NULL, will return a ref-counted pointer to a
709  * struct vmw_fence_obj. The returned fence pointer may be NULL in which
710  * case the device has already synchronized.
711  * @crtc: If crtc is passed, perform surface dirty on that crtc only.
712  *
713  * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
714  * interrupted.
715  */
vmw_kms_stdu_surface_dirty(struct vmw_private * dev_priv,struct vmw_framebuffer * framebuffer,struct drm_clip_rect * clips,struct drm_vmw_rect * vclips,struct vmw_resource * srf,s32 dest_x,s32 dest_y,unsigned num_clips,int inc,struct vmw_fence_obj ** out_fence,struct drm_crtc * crtc)716 int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
717 			       struct vmw_framebuffer *framebuffer,
718 			       struct drm_clip_rect *clips,
719 			       struct drm_vmw_rect *vclips,
720 			       struct vmw_resource *srf,
721 			       s32 dest_x,
722 			       s32 dest_y,
723 			       unsigned num_clips, int inc,
724 			       struct vmw_fence_obj **out_fence,
725 			       struct drm_crtc *crtc)
726 {
727 	struct vmw_framebuffer_surface *vfbs =
728 		container_of(framebuffer, typeof(*vfbs), base);
729 	struct vmw_stdu_dirty sdirty;
730 	DECLARE_VAL_CONTEXT(val_ctx, NULL, 0);
731 	int ret;
732 
733 	if (!srf)
734 		srf = &vfbs->surface->res;
735 
736 	ret = vmw_validation_add_resource(&val_ctx, srf, 0, VMW_RES_DIRTY_NONE,
737 					  NULL, NULL);
738 	if (ret)
739 		return ret;
740 
741 	ret = vmw_validation_prepare(&val_ctx, &dev_priv->cmdbuf_mutex, true);
742 	if (ret)
743 		goto out_unref;
744 
745 	if (vfbs->is_bo_proxy) {
746 		ret = vmw_kms_update_proxy(srf, clips, num_clips, inc);
747 		if (ret)
748 			goto out_finish;
749 	}
750 
751 	sdirty.base.fifo_commit = vmw_kms_stdu_surface_fifo_commit;
752 	sdirty.base.clip = vmw_kms_stdu_surface_clip;
753 	sdirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_surface_copy) +
754 		sizeof(SVGA3dCopyBox) * num_clips +
755 		sizeof(struct vmw_stdu_update);
756 	sdirty.base.crtc = crtc;
757 	sdirty.sid = srf->id;
758 	sdirty.left = sdirty.top = S32_MAX;
759 	sdirty.right = sdirty.bottom = S32_MIN;
760 
761 	ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
762 				   dest_x, dest_y, num_clips, inc,
763 				   &sdirty.base);
764 out_finish:
765 	vmw_kms_helper_validation_finish(dev_priv, NULL, &val_ctx, out_fence,
766 					 NULL);
767 
768 	return ret;
769 
770 out_unref:
771 	vmw_validation_unref_lists(&val_ctx);
772 	return ret;
773 }
774 
775 
776 /*
777  *  Screen Target CRTC dispatch table
778  */
779 static const struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
780 	.gamma_set = vmw_du_crtc_gamma_set,
781 	.destroy = vmw_stdu_crtc_destroy,
782 	.reset = vmw_du_crtc_reset,
783 	.atomic_duplicate_state = vmw_du_crtc_duplicate_state,
784 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
785 	.set_config = drm_atomic_helper_set_config,
786 	.page_flip = drm_atomic_helper_page_flip,
787 };
788 
789 
790 
791 /******************************************************************************
792  * Screen Target Display Unit Encoder Functions
793  *****************************************************************************/
794 
795 /**
796  * vmw_stdu_encoder_destroy - cleans up the STDU
797  *
798  * @encoder: used the get the containing STDU
799  *
800  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
801  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
802  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
803  * get called.
804  */
vmw_stdu_encoder_destroy(struct drm_encoder * encoder)805 static void vmw_stdu_encoder_destroy(struct drm_encoder *encoder)
806 {
807 	vmw_stdu_destroy(vmw_encoder_to_stdu(encoder));
808 }
809 
810 static const struct drm_encoder_funcs vmw_stdu_encoder_funcs = {
811 	.destroy = vmw_stdu_encoder_destroy,
812 };
813 
814 
815 
816 /******************************************************************************
817  * Screen Target Display Unit Connector Functions
818  *****************************************************************************/
819 
820 /**
821  * vmw_stdu_connector_destroy - cleans up the STDU
822  *
823  * @connector: used to get the containing STDU
824  *
825  * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
826  * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
827  * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
828  * get called.
829  */
vmw_stdu_connector_destroy(struct drm_connector * connector)830 static void vmw_stdu_connector_destroy(struct drm_connector *connector)
831 {
832 	vmw_stdu_destroy(vmw_connector_to_stdu(connector));
833 }
834 
835 static enum drm_mode_status
vmw_stdu_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)836 vmw_stdu_connector_mode_valid(struct drm_connector *connector,
837 			      struct drm_display_mode *mode)
838 {
839 	enum drm_mode_status ret;
840 	struct drm_device *dev = connector->dev;
841 	struct vmw_private *dev_priv = vmw_priv(dev);
842 	u64 assumed_cpp = dev_priv->assume_16bpp ? 2 : 4;
843 	/* Align width and height to account for GPU tile over-alignment */
844 	u64 required_mem = ALIGN(mode->hdisplay, GPU_TILE_SIZE) *
845 			   ALIGN(mode->vdisplay, GPU_TILE_SIZE) *
846 			   assumed_cpp;
847 	required_mem = ALIGN(required_mem, PAGE_SIZE);
848 
849 	ret = drm_mode_validate_size(mode, dev_priv->stdu_max_width,
850 				     dev_priv->stdu_max_height);
851 	if (ret != MODE_OK)
852 		return ret;
853 
854 	ret = drm_mode_validate_size(mode, dev_priv->texture_max_width,
855 				     dev_priv->texture_max_height);
856 	if (ret != MODE_OK)
857 		return ret;
858 
859 	if (required_mem > dev_priv->max_primary_mem)
860 		return MODE_MEM;
861 
862 	if (required_mem > dev_priv->max_mob_pages * PAGE_SIZE)
863 		return MODE_MEM;
864 
865 	if (required_mem > dev_priv->max_mob_size)
866 		return MODE_MEM;
867 
868 	return MODE_OK;
869 }
870 
871 /*
872  * Trigger a modeset if the X,Y position of the Screen Target changes.
873  * This is needed when multi-mon is cycled. The original Screen Target will have
874  * the same mode but its relative X,Y position in the topology will change.
875  */
vmw_stdu_connector_atomic_check(struct drm_connector * conn,struct drm_atomic_state * state)876 static int vmw_stdu_connector_atomic_check(struct drm_connector *conn,
877 					   struct drm_atomic_state *state)
878 {
879 	struct drm_connector_state *conn_state;
880 	struct vmw_screen_target_display_unit *du;
881 	struct drm_crtc_state *new_crtc_state;
882 
883 	conn_state = drm_atomic_get_connector_state(state, conn);
884 	du = vmw_connector_to_stdu(conn);
885 
886 	if (!conn_state->crtc)
887 		return 0;
888 
889 	new_crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
890 	if (du->base.gui_x != du->base.set_gui_x ||
891 	    du->base.gui_y != du->base.set_gui_y)
892 		new_crtc_state->mode_changed = true;
893 
894 	return 0;
895 }
896 
897 static const struct drm_connector_funcs vmw_stdu_connector_funcs = {
898 	.dpms = vmw_du_connector_dpms,
899 	.detect = vmw_du_connector_detect,
900 	.fill_modes = drm_helper_probe_single_connector_modes,
901 	.destroy = vmw_stdu_connector_destroy,
902 	.reset = vmw_du_connector_reset,
903 	.atomic_duplicate_state = vmw_du_connector_duplicate_state,
904 	.atomic_destroy_state = vmw_du_connector_destroy_state,
905 };
906 
907 
908 static const struct
909 drm_connector_helper_funcs vmw_stdu_connector_helper_funcs = {
910 	.get_modes = vmw_connector_get_modes,
911 	.mode_valid = vmw_stdu_connector_mode_valid,
912 	.atomic_check = vmw_stdu_connector_atomic_check,
913 };
914 
915 
916 
917 /******************************************************************************
918  * Screen Target Display Plane Functions
919  *****************************************************************************/
920 
921 
922 
923 /**
924  * vmw_stdu_primary_plane_cleanup_fb - Unpins the display surface
925  *
926  * @plane:  display plane
927  * @old_state: Contains the FB to clean up
928  *
929  * Unpins the display surface
930  *
931  * Returns 0 on success
932  */
933 static void
vmw_stdu_primary_plane_cleanup_fb(struct drm_plane * plane,struct drm_plane_state * old_state)934 vmw_stdu_primary_plane_cleanup_fb(struct drm_plane *plane,
935 				  struct drm_plane_state *old_state)
936 {
937 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(old_state);
938 
939 	if (vps->surf)
940 		WARN_ON(!vps->pinned);
941 
942 	vmw_du_plane_cleanup_fb(plane, old_state);
943 
944 	vps->content_fb_type = SAME_AS_DISPLAY;
945 	vps->cpp = 0;
946 }
947 
948 
949 
950 /**
951  * vmw_stdu_primary_plane_prepare_fb - Readies the display surface
952  *
953  * @plane:  display plane
954  * @new_state: info on the new plane state, including the FB
955  *
956  * This function allocates a new display surface if the content is
957  * backed by a buffer object.  The display surface is pinned here, and it'll
958  * be unpinned in .cleanup_fb()
959  *
960  * Returns 0 on success
961  */
962 static int
vmw_stdu_primary_plane_prepare_fb(struct drm_plane * plane,struct drm_plane_state * new_state)963 vmw_stdu_primary_plane_prepare_fb(struct drm_plane *plane,
964 				  struct drm_plane_state *new_state)
965 {
966 	struct vmw_private *dev_priv = vmw_priv(plane->dev);
967 	struct drm_framebuffer *new_fb = new_state->fb;
968 	struct vmw_framebuffer *vfb;
969 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
970 	enum stdu_content_type new_content_type;
971 	struct vmw_framebuffer_surface *new_vfbs;
972 	uint32_t hdisplay = new_state->crtc_w, vdisplay = new_state->crtc_h;
973 	int ret;
974 
975 	/* No FB to prepare */
976 	if (!new_fb) {
977 		if (vps->surf) {
978 			WARN_ON(vps->pinned != 0);
979 			vmw_surface_unreference(&vps->surf);
980 		}
981 
982 		return 0;
983 	}
984 
985 	vfb = vmw_framebuffer_to_vfb(new_fb);
986 	new_vfbs = (vfb->bo) ? NULL : vmw_framebuffer_to_vfbs(new_fb);
987 
988 	if (new_vfbs &&
989 	    new_vfbs->surface->metadata.base_size.width == hdisplay &&
990 	    new_vfbs->surface->metadata.base_size.height == vdisplay)
991 		new_content_type = SAME_AS_DISPLAY;
992 	else if (vfb->bo)
993 		new_content_type = SEPARATE_BO;
994 	else
995 		new_content_type = SEPARATE_SURFACE;
996 
997 	if (new_content_type != SAME_AS_DISPLAY) {
998 		struct vmw_surface_metadata metadata = {0};
999 
1000 		/*
1001 		 * If content buffer is a buffer object, then we have to
1002 		 * construct surface info
1003 		 */
1004 		if (new_content_type == SEPARATE_BO) {
1005 
1006 			switch (new_fb->format->cpp[0]*8) {
1007 			case 32:
1008 				metadata.format = SVGA3D_X8R8G8B8;
1009 				break;
1010 
1011 			case 16:
1012 				metadata.format = SVGA3D_R5G6B5;
1013 				break;
1014 
1015 			case 8:
1016 				metadata.format = SVGA3D_P8;
1017 				break;
1018 
1019 			default:
1020 				DRM_ERROR("Invalid format\n");
1021 				return -EINVAL;
1022 			}
1023 
1024 			metadata.mip_levels[0] = 1;
1025 			metadata.num_sizes = 1;
1026 			metadata.scanout = true;
1027 		} else {
1028 			metadata = new_vfbs->surface->metadata;
1029 		}
1030 
1031 		metadata.base_size.width = hdisplay;
1032 		metadata.base_size.height = vdisplay;
1033 		metadata.base_size.depth = 1;
1034 
1035 		if (vps->surf) {
1036 			struct drm_vmw_size cur_base_size =
1037 				vps->surf->metadata.base_size;
1038 
1039 			if (cur_base_size.width != metadata.base_size.width ||
1040 			    cur_base_size.height != metadata.base_size.height ||
1041 			    vps->surf->metadata.format != metadata.format) {
1042 				WARN_ON(vps->pinned != 0);
1043 				vmw_surface_unreference(&vps->surf);
1044 			}
1045 
1046 		}
1047 
1048 		if (!vps->surf) {
1049 			ret = vmw_gb_surface_define(dev_priv, &metadata,
1050 						    &vps->surf);
1051 			if (ret != 0) {
1052 				DRM_ERROR("Couldn't allocate STDU surface.\n");
1053 				return ret;
1054 			}
1055 		}
1056 	} else {
1057 		/*
1058 		 * prepare_fb and clean_fb should only take care of pinning
1059 		 * and unpinning.  References are tracked by state objects.
1060 		 * The only time we add a reference in prepare_fb is if the
1061 		 * state object doesn't have a reference to begin with
1062 		 */
1063 		if (vps->surf) {
1064 			WARN_ON(vps->pinned != 0);
1065 			vmw_surface_unreference(&vps->surf);
1066 		}
1067 
1068 		vps->surf = vmw_surface_reference(new_vfbs->surface);
1069 	}
1070 
1071 	if (vps->surf) {
1072 
1073 		/* Pin new surface before flipping */
1074 		ret = vmw_resource_pin(&vps->surf->res, false);
1075 		if (ret)
1076 			goto out_srf_unref;
1077 
1078 		vps->pinned++;
1079 	}
1080 
1081 	vps->content_fb_type = new_content_type;
1082 
1083 	/*
1084 	 * This should only happen if the buffer object is too large to create a
1085 	 * proxy surface for.
1086 	 */
1087 	if (vps->content_fb_type == SEPARATE_BO)
1088 		vps->cpp = new_fb->pitches[0] / new_fb->width;
1089 
1090 	return 0;
1091 
1092 out_srf_unref:
1093 	vmw_surface_unreference(&vps->surf);
1094 	return ret;
1095 }
1096 
vmw_stdu_bo_fifo_size_cpu(struct vmw_du_update_plane * update,uint32_t num_hits)1097 static uint32_t vmw_stdu_bo_fifo_size_cpu(struct vmw_du_update_plane *update,
1098 					  uint32_t num_hits)
1099 {
1100 	return sizeof(struct vmw_stdu_update_gb_image) +
1101 		sizeof(struct vmw_stdu_update);
1102 }
1103 
vmw_stdu_bo_pre_clip_cpu(struct vmw_du_update_plane * update,void * cmd,uint32_t num_hits)1104 static uint32_t vmw_stdu_bo_pre_clip_cpu(struct vmw_du_update_plane  *update,
1105 					 void *cmd, uint32_t num_hits)
1106 {
1107 	struct vmw_du_update_plane_buffer *bo_update =
1108 		container_of(update, typeof(*bo_update), base);
1109 
1110 	bo_update->fb_left = INT_MAX;
1111 	bo_update->fb_top = INT_MAX;
1112 
1113 	return 0;
1114 }
1115 
vmw_stdu_bo_clip_cpu(struct vmw_du_update_plane * update,void * cmd,struct drm_rect * clip,uint32_t fb_x,uint32_t fb_y)1116 static uint32_t vmw_stdu_bo_clip_cpu(struct vmw_du_update_plane  *update,
1117 				     void *cmd, struct drm_rect *clip,
1118 				     uint32_t fb_x, uint32_t fb_y)
1119 {
1120 	struct vmw_du_update_plane_buffer *bo_update =
1121 		container_of(update, typeof(*bo_update), base);
1122 
1123 	bo_update->fb_left = min_t(int, bo_update->fb_left, fb_x);
1124 	bo_update->fb_top = min_t(int, bo_update->fb_top, fb_y);
1125 
1126 	return 0;
1127 }
1128 
1129 static uint32_t
vmw_stdu_bo_populate_update_cpu(struct vmw_du_update_plane * update,void * cmd,struct drm_rect * bb)1130 vmw_stdu_bo_populate_update_cpu(struct vmw_du_update_plane  *update, void *cmd,
1131 				struct drm_rect *bb)
1132 {
1133 	struct vmw_du_update_plane_buffer *bo_update;
1134 	struct vmw_screen_target_display_unit *stdu;
1135 	struct vmw_framebuffer_bo *vfbbo;
1136 	struct vmw_diff_cpy diff = VMW_CPU_BLIT_DIFF_INITIALIZER(0);
1137 	struct vmw_stdu_update_gb_image *cmd_img = cmd;
1138 	struct vmw_stdu_update *cmd_update;
1139 	struct vmw_bo *src_bo, *dst_bo;
1140 	u32 src_offset, dst_offset;
1141 	s32 src_pitch, dst_pitch;
1142 	s32 width, height;
1143 
1144 	bo_update = container_of(update, typeof(*bo_update), base);
1145 	stdu = container_of(update->du, typeof(*stdu), base);
1146 	vfbbo = container_of(update->vfb, typeof(*vfbbo), base);
1147 
1148 	width = bb->x2 - bb->x1;
1149 	height = bb->y2 - bb->y1;
1150 
1151 	diff.cpp = stdu->cpp;
1152 
1153 	dst_bo = stdu->display_srf->res.guest_memory_bo;
1154 	dst_pitch = stdu->display_srf->metadata.base_size.width * stdu->cpp;
1155 	dst_offset = bb->y1 * dst_pitch + bb->x1 * stdu->cpp;
1156 
1157 	src_bo = vfbbo->buffer;
1158 	src_pitch = update->vfb->base.pitches[0];
1159 	src_offset = bo_update->fb_top * src_pitch + bo_update->fb_left *
1160 		stdu->cpp;
1161 
1162 	(void) vmw_bo_cpu_blit(dst_bo, dst_offset, dst_pitch, src_bo,
1163 			       src_offset, src_pitch, width * stdu->cpp, height,
1164 			       &diff);
1165 
1166 	if (drm_rect_visible(&diff.rect)) {
1167 		SVGA3dBox *box = &cmd_img->body.box;
1168 
1169 		cmd_img->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
1170 		cmd_img->header.size = sizeof(cmd_img->body);
1171 		cmd_img->body.image.sid = stdu->display_srf->res.id;
1172 		cmd_img->body.image.face = 0;
1173 		cmd_img->body.image.mipmap = 0;
1174 
1175 		box->x = diff.rect.x1;
1176 		box->y = diff.rect.y1;
1177 		box->z = 0;
1178 		box->w = drm_rect_width(&diff.rect);
1179 		box->h = drm_rect_height(&diff.rect);
1180 		box->d = 1;
1181 
1182 		cmd_update = (struct vmw_stdu_update *)&cmd_img[1];
1183 		vmw_stdu_populate_update(cmd_update, stdu->base.unit,
1184 					 diff.rect.x1, diff.rect.x2,
1185 					 diff.rect.y1, diff.rect.y2);
1186 
1187 		return sizeof(*cmd_img) + sizeof(*cmd_update);
1188 	}
1189 
1190 	return 0;
1191 }
1192 
1193 /**
1194  * vmw_stdu_plane_update_bo - Update display unit for bo backed fb.
1195  * @dev_priv: device private.
1196  * @plane: plane state.
1197  * @old_state: old plane state.
1198  * @vfb: framebuffer which is blitted to display unit.
1199  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
1200  *             The returned fence pointer may be NULL in which case the device
1201  *             has already synchronized.
1202  *
1203  * Return: 0 on success or a negative error code on failure.
1204  */
vmw_stdu_plane_update_bo(struct vmw_private * dev_priv,struct drm_plane * plane,struct drm_plane_state * old_state,struct vmw_framebuffer * vfb,struct vmw_fence_obj ** out_fence)1205 static int vmw_stdu_plane_update_bo(struct vmw_private *dev_priv,
1206 				    struct drm_plane *plane,
1207 				    struct drm_plane_state *old_state,
1208 				    struct vmw_framebuffer *vfb,
1209 				    struct vmw_fence_obj **out_fence)
1210 {
1211 	struct vmw_du_update_plane_buffer bo_update;
1212 
1213 	memset(&bo_update, 0, sizeof(struct vmw_du_update_plane_buffer));
1214 	bo_update.base.plane = plane;
1215 	bo_update.base.old_state = old_state;
1216 	bo_update.base.dev_priv = dev_priv;
1217 	bo_update.base.du = vmw_crtc_to_du(plane->state->crtc);
1218 	bo_update.base.vfb = vfb;
1219 	bo_update.base.out_fence = out_fence;
1220 	bo_update.base.mutex = NULL;
1221 	bo_update.base.intr = false;
1222 
1223 	bo_update.base.calc_fifo_size = vmw_stdu_bo_fifo_size_cpu;
1224 	bo_update.base.pre_clip = vmw_stdu_bo_pre_clip_cpu;
1225 	bo_update.base.clip = vmw_stdu_bo_clip_cpu;
1226 	bo_update.base.post_clip = vmw_stdu_bo_populate_update_cpu;
1227 
1228 	return vmw_du_helper_plane_update(&bo_update.base);
1229 }
1230 
1231 static uint32_t
vmw_stdu_surface_fifo_size_same_display(struct vmw_du_update_plane * update,uint32_t num_hits)1232 vmw_stdu_surface_fifo_size_same_display(struct vmw_du_update_plane *update,
1233 					uint32_t num_hits)
1234 {
1235 	struct vmw_framebuffer_surface *vfbs;
1236 	uint32_t size = 0;
1237 
1238 	vfbs = container_of(update->vfb, typeof(*vfbs), base);
1239 
1240 	if (vfbs->is_bo_proxy)
1241 		size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;
1242 
1243 	size += sizeof(struct vmw_stdu_update);
1244 
1245 	return size;
1246 }
1247 
vmw_stdu_surface_fifo_size(struct vmw_du_update_plane * update,uint32_t num_hits)1248 static uint32_t vmw_stdu_surface_fifo_size(struct vmw_du_update_plane *update,
1249 					   uint32_t num_hits)
1250 {
1251 	struct vmw_framebuffer_surface *vfbs;
1252 	uint32_t size = 0;
1253 
1254 	vfbs = container_of(update->vfb, typeof(*vfbs), base);
1255 
1256 	if (vfbs->is_bo_proxy)
1257 		size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;
1258 
1259 	size += sizeof(struct vmw_stdu_surface_copy) + sizeof(SVGA3dCopyBox) *
1260 		num_hits + sizeof(struct vmw_stdu_update);
1261 
1262 	return size;
1263 }
1264 
1265 static uint32_t
vmw_stdu_surface_update_proxy(struct vmw_du_update_plane * update,void * cmd)1266 vmw_stdu_surface_update_proxy(struct vmw_du_update_plane *update, void *cmd)
1267 {
1268 	struct vmw_framebuffer_surface *vfbs;
1269 	struct drm_plane_state *state = update->plane->state;
1270 	struct drm_plane_state *old_state = update->old_state;
1271 	struct vmw_stdu_update_gb_image *cmd_update = cmd;
1272 	struct drm_atomic_helper_damage_iter iter;
1273 	struct drm_rect clip;
1274 	uint32_t copy_size = 0;
1275 
1276 	vfbs = container_of(update->vfb, typeof(*vfbs), base);
1277 
1278 	/*
1279 	 * proxy surface is special where a buffer object type fb is wrapped
1280 	 * in a surface and need an update gb image command to sync with device.
1281 	 */
1282 	drm_atomic_helper_damage_iter_init(&iter, old_state, state);
1283 	drm_atomic_for_each_plane_damage(&iter, &clip) {
1284 		SVGA3dBox *box = &cmd_update->body.box;
1285 
1286 		cmd_update->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
1287 		cmd_update->header.size = sizeof(cmd_update->body);
1288 		cmd_update->body.image.sid = vfbs->surface->res.id;
1289 		cmd_update->body.image.face = 0;
1290 		cmd_update->body.image.mipmap = 0;
1291 
1292 		box->x = clip.x1;
1293 		box->y = clip.y1;
1294 		box->z = 0;
1295 		box->w = drm_rect_width(&clip);
1296 		box->h = drm_rect_height(&clip);
1297 		box->d = 1;
1298 
1299 		copy_size += sizeof(*cmd_update);
1300 		cmd_update++;
1301 	}
1302 
1303 	return copy_size;
1304 }
1305 
1306 static uint32_t
vmw_stdu_surface_populate_copy(struct vmw_du_update_plane * update,void * cmd,uint32_t num_hits)1307 vmw_stdu_surface_populate_copy(struct vmw_du_update_plane  *update, void *cmd,
1308 			       uint32_t num_hits)
1309 {
1310 	struct vmw_screen_target_display_unit *stdu;
1311 	struct vmw_framebuffer_surface *vfbs;
1312 	struct vmw_stdu_surface_copy *cmd_copy = cmd;
1313 
1314 	stdu = container_of(update->du, typeof(*stdu), base);
1315 	vfbs = container_of(update->vfb, typeof(*vfbs), base);
1316 
1317 	cmd_copy->header.id = SVGA_3D_CMD_SURFACE_COPY;
1318 	cmd_copy->header.size = sizeof(cmd_copy->body) + sizeof(SVGA3dCopyBox) *
1319 		num_hits;
1320 	cmd_copy->body.src.sid = vfbs->surface->res.id;
1321 	cmd_copy->body.dest.sid = stdu->display_srf->res.id;
1322 
1323 	return sizeof(*cmd_copy);
1324 }
1325 
1326 static uint32_t
vmw_stdu_surface_populate_clip(struct vmw_du_update_plane * update,void * cmd,struct drm_rect * clip,uint32_t fb_x,uint32_t fb_y)1327 vmw_stdu_surface_populate_clip(struct vmw_du_update_plane  *update, void *cmd,
1328 			       struct drm_rect *clip, uint32_t fb_x,
1329 			       uint32_t fb_y)
1330 {
1331 	struct SVGA3dCopyBox *box = cmd;
1332 
1333 	box->srcx = fb_x;
1334 	box->srcy = fb_y;
1335 	box->srcz = 0;
1336 	box->x = clip->x1;
1337 	box->y = clip->y1;
1338 	box->z = 0;
1339 	box->w = drm_rect_width(clip);
1340 	box->h = drm_rect_height(clip);
1341 	box->d = 1;
1342 
1343 	return sizeof(*box);
1344 }
1345 
1346 static uint32_t
vmw_stdu_surface_populate_update(struct vmw_du_update_plane * update,void * cmd,struct drm_rect * bb)1347 vmw_stdu_surface_populate_update(struct vmw_du_update_plane  *update, void *cmd,
1348 				 struct drm_rect *bb)
1349 {
1350 	vmw_stdu_populate_update(cmd, update->du->unit, bb->x1, bb->x2, bb->y1,
1351 				 bb->y2);
1352 
1353 	return sizeof(struct vmw_stdu_update);
1354 }
1355 
1356 /**
1357  * vmw_stdu_plane_update_surface - Update display unit for surface backed fb
1358  * @dev_priv: Device private
1359  * @plane: Plane state
1360  * @old_state: Old plane state
1361  * @vfb: Framebuffer which is blitted to display unit
1362  * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
1363  *             The returned fence pointer may be NULL in which case the device
1364  *             has already synchronized.
1365  *
1366  * Return: 0 on success or a negative error code on failure.
1367  */
vmw_stdu_plane_update_surface(struct vmw_private * dev_priv,struct drm_plane * plane,struct drm_plane_state * old_state,struct vmw_framebuffer * vfb,struct vmw_fence_obj ** out_fence)1368 static int vmw_stdu_plane_update_surface(struct vmw_private *dev_priv,
1369 					 struct drm_plane *plane,
1370 					 struct drm_plane_state *old_state,
1371 					 struct vmw_framebuffer *vfb,
1372 					 struct vmw_fence_obj **out_fence)
1373 {
1374 	struct vmw_du_update_plane srf_update;
1375 	struct vmw_screen_target_display_unit *stdu;
1376 	struct vmw_framebuffer_surface *vfbs;
1377 
1378 	stdu = vmw_crtc_to_stdu(plane->state->crtc);
1379 	vfbs = container_of(vfb, typeof(*vfbs), base);
1380 
1381 	memset(&srf_update, 0, sizeof(struct vmw_du_update_plane));
1382 	srf_update.plane = plane;
1383 	srf_update.old_state = old_state;
1384 	srf_update.dev_priv = dev_priv;
1385 	srf_update.du = vmw_crtc_to_du(plane->state->crtc);
1386 	srf_update.vfb = vfb;
1387 	srf_update.out_fence = out_fence;
1388 	srf_update.mutex = &dev_priv->cmdbuf_mutex;
1389 	srf_update.intr = true;
1390 
1391 	if (vfbs->is_bo_proxy)
1392 		srf_update.post_prepare = vmw_stdu_surface_update_proxy;
1393 
1394 	if (vfbs->surface->res.id != stdu->display_srf->res.id) {
1395 		srf_update.calc_fifo_size = vmw_stdu_surface_fifo_size;
1396 		srf_update.pre_clip = vmw_stdu_surface_populate_copy;
1397 		srf_update.clip = vmw_stdu_surface_populate_clip;
1398 	} else {
1399 		srf_update.calc_fifo_size =
1400 			vmw_stdu_surface_fifo_size_same_display;
1401 	}
1402 
1403 	srf_update.post_clip = vmw_stdu_surface_populate_update;
1404 
1405 	return vmw_du_helper_plane_update(&srf_update);
1406 }
1407 
1408 /**
1409  * vmw_stdu_primary_plane_atomic_update - formally switches STDU to new plane
1410  * @plane: display plane
1411  * @state: Only used to get crtc info
1412  *
1413  * Formally update stdu->display_srf to the new plane, and bind the new
1414  * plane STDU.  This function is called during the commit phase when
1415  * all the preparation have been done and all the configurations have
1416  * been checked.
1417  */
1418 static void
vmw_stdu_primary_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)1419 vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
1420 				     struct drm_atomic_state *state)
1421 {
1422 	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
1423 	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
1424 	struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
1425 	struct drm_crtc *crtc = new_state->crtc;
1426 	struct vmw_screen_target_display_unit *stdu;
1427 	struct vmw_fence_obj *fence = NULL;
1428 	struct vmw_private *dev_priv;
1429 	int ret;
1430 
1431 	/* If case of device error, maintain consistent atomic state */
1432 	if (crtc && new_state->fb) {
1433 		struct vmw_framebuffer *vfb =
1434 			vmw_framebuffer_to_vfb(new_state->fb);
1435 		stdu = vmw_crtc_to_stdu(crtc);
1436 		dev_priv = vmw_priv(crtc->dev);
1437 
1438 		stdu->display_srf = vps->surf;
1439 		stdu->content_fb_type = vps->content_fb_type;
1440 		stdu->cpp = vps->cpp;
1441 
1442 		ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
1443 		if (ret)
1444 			DRM_ERROR("Failed to bind surface to STDU.\n");
1445 
1446 		if (vfb->bo)
1447 			ret = vmw_stdu_plane_update_bo(dev_priv, plane,
1448 						       old_state, vfb, &fence);
1449 		else
1450 			ret = vmw_stdu_plane_update_surface(dev_priv, plane,
1451 							    old_state, vfb,
1452 							    &fence);
1453 		if (ret)
1454 			DRM_ERROR("Failed to update STDU.\n");
1455 	} else {
1456 		crtc = old_state->crtc;
1457 		stdu = vmw_crtc_to_stdu(crtc);
1458 		dev_priv = vmw_priv(crtc->dev);
1459 
1460 		/* Blank STDU when fb and crtc are NULL */
1461 		if (!stdu->defined)
1462 			return;
1463 
1464 		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
1465 		if (ret)
1466 			DRM_ERROR("Failed to blank STDU\n");
1467 
1468 		ret = vmw_stdu_update_st(dev_priv, stdu);
1469 		if (ret)
1470 			DRM_ERROR("Failed to update STDU.\n");
1471 
1472 		return;
1473 	}
1474 
1475 	if (fence)
1476 		vmw_fence_obj_unreference(&fence);
1477 }
1478 
1479 
1480 static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
1481 	.update_plane = drm_atomic_helper_update_plane,
1482 	.disable_plane = drm_atomic_helper_disable_plane,
1483 	.destroy = vmw_du_primary_plane_destroy,
1484 	.reset = vmw_du_plane_reset,
1485 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
1486 	.atomic_destroy_state = vmw_du_plane_destroy_state,
1487 };
1488 
1489 static const struct drm_plane_funcs vmw_stdu_cursor_funcs = {
1490 	.update_plane = drm_atomic_helper_update_plane,
1491 	.disable_plane = drm_atomic_helper_disable_plane,
1492 	.destroy = vmw_du_cursor_plane_destroy,
1493 	.reset = vmw_du_plane_reset,
1494 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
1495 	.atomic_destroy_state = vmw_du_plane_destroy_state,
1496 };
1497 
1498 
1499 /*
1500  * Atomic Helpers
1501  */
1502 static const struct
1503 drm_plane_helper_funcs vmw_stdu_cursor_plane_helper_funcs = {
1504 	.atomic_check = vmw_du_cursor_plane_atomic_check,
1505 	.atomic_update = vmw_du_cursor_plane_atomic_update,
1506 	.prepare_fb = vmw_du_cursor_plane_prepare_fb,
1507 	.cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
1508 };
1509 
1510 static const struct
1511 drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
1512 	.atomic_check = vmw_du_primary_plane_atomic_check,
1513 	.atomic_update = vmw_stdu_primary_plane_atomic_update,
1514 	.prepare_fb = vmw_stdu_primary_plane_prepare_fb,
1515 	.cleanup_fb = vmw_stdu_primary_plane_cleanup_fb,
1516 };
1517 
1518 static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
1519 	.prepare = vmw_stdu_crtc_helper_prepare,
1520 	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
1521 	.atomic_check = vmw_du_crtc_atomic_check,
1522 	.atomic_begin = vmw_du_crtc_atomic_begin,
1523 	.atomic_flush = vmw_du_crtc_atomic_flush,
1524 	.atomic_enable = vmw_stdu_crtc_atomic_enable,
1525 	.atomic_disable = vmw_stdu_crtc_atomic_disable,
1526 };
1527 
1528 
1529 /**
1530  * vmw_stdu_init - Sets up a Screen Target Display Unit
1531  *
1532  * @dev_priv: VMW DRM device
1533  * @unit: unit number range from 0 to VMWGFX_NUM_DISPLAY_UNITS
1534  *
1535  * This function is called once per CRTC, and allocates one Screen Target
1536  * display unit to represent that CRTC.  Since the SVGA device does not separate
1537  * out encoder and connector, they are represented as part of the STDU as well.
1538  */
vmw_stdu_init(struct vmw_private * dev_priv,unsigned unit)1539 static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
1540 {
1541 	struct vmw_screen_target_display_unit *stdu;
1542 	struct drm_device *dev = &dev_priv->drm;
1543 	struct drm_connector *connector;
1544 	struct drm_encoder *encoder;
1545 	struct drm_plane *primary;
1546 	struct vmw_cursor_plane *cursor;
1547 	struct drm_crtc *crtc;
1548 	int    ret;
1549 
1550 	stdu = kzalloc(sizeof(*stdu), GFP_KERNEL);
1551 	if (!stdu)
1552 		return -ENOMEM;
1553 
1554 	stdu->base.unit = unit;
1555 	crtc = &stdu->base.crtc;
1556 	encoder = &stdu->base.encoder;
1557 	connector = &stdu->base.connector;
1558 	primary = &stdu->base.primary;
1559 	cursor = &stdu->base.cursor;
1560 
1561 	stdu->base.pref_active = (unit == 0);
1562 	stdu->base.pref_width  = dev_priv->initial_width;
1563 	stdu->base.pref_height = dev_priv->initial_height;
1564 	stdu->base.is_implicit = false;
1565 
1566 	/* Initialize primary plane */
1567 	ret = drm_universal_plane_init(dev, primary,
1568 				       0, &vmw_stdu_plane_funcs,
1569 				       vmw_primary_plane_formats,
1570 				       ARRAY_SIZE(vmw_primary_plane_formats),
1571 				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
1572 	if (ret) {
1573 		DRM_ERROR("Failed to initialize primary plane");
1574 		goto err_free;
1575 	}
1576 
1577 	drm_plane_helper_add(primary, &vmw_stdu_primary_plane_helper_funcs);
1578 	drm_plane_enable_fb_damage_clips(primary);
1579 
1580 	/* Initialize cursor plane */
1581 	ret = drm_universal_plane_init(dev, &cursor->base,
1582 			0, &vmw_stdu_cursor_funcs,
1583 			vmw_cursor_plane_formats,
1584 			ARRAY_SIZE(vmw_cursor_plane_formats),
1585 			NULL, DRM_PLANE_TYPE_CURSOR, NULL);
1586 	if (ret) {
1587 		DRM_ERROR("Failed to initialize cursor plane");
1588 		drm_plane_cleanup(&stdu->base.primary);
1589 		goto err_free;
1590 	}
1591 
1592 	drm_plane_helper_add(&cursor->base, &vmw_stdu_cursor_plane_helper_funcs);
1593 
1594 	ret = drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
1595 				 DRM_MODE_CONNECTOR_VIRTUAL);
1596 	if (ret) {
1597 		DRM_ERROR("Failed to initialize connector\n");
1598 		goto err_free;
1599 	}
1600 
1601 	drm_connector_helper_add(connector, &vmw_stdu_connector_helper_funcs);
1602 	connector->status = vmw_du_connector_detect(connector, false);
1603 
1604 	ret = drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
1605 			       DRM_MODE_ENCODER_VIRTUAL, NULL);
1606 	if (ret) {
1607 		DRM_ERROR("Failed to initialize encoder\n");
1608 		goto err_free_connector;
1609 	}
1610 
1611 	(void) drm_connector_attach_encoder(connector, encoder);
1612 	encoder->possible_crtcs = (1 << unit);
1613 	encoder->possible_clones = 0;
1614 
1615 	ret = drm_connector_register(connector);
1616 	if (ret) {
1617 		DRM_ERROR("Failed to register connector\n");
1618 		goto err_free_encoder;
1619 	}
1620 
1621 	ret = drm_crtc_init_with_planes(dev, crtc, primary,
1622 					&cursor->base,
1623 					&vmw_stdu_crtc_funcs, NULL);
1624 	if (ret) {
1625 		DRM_ERROR("Failed to initialize CRTC\n");
1626 		goto err_free_unregister;
1627 	}
1628 
1629 	drm_crtc_helper_add(crtc, &vmw_stdu_crtc_helper_funcs);
1630 
1631 	drm_mode_crtc_set_gamma_size(crtc, 256);
1632 
1633 	drm_object_attach_property(&connector->base,
1634 				   dev_priv->hotplug_mode_update_property, 1);
1635 	drm_object_attach_property(&connector->base,
1636 				   dev->mode_config.suggested_x_property, 0);
1637 	drm_object_attach_property(&connector->base,
1638 				   dev->mode_config.suggested_y_property, 0);
1639 	return 0;
1640 
1641 err_free_unregister:
1642 	drm_connector_unregister(connector);
1643 err_free_encoder:
1644 	drm_encoder_cleanup(encoder);
1645 err_free_connector:
1646 	drm_connector_cleanup(connector);
1647 err_free:
1648 	kfree(stdu);
1649 	return ret;
1650 }
1651 
1652 
1653 
1654 /**
1655  *  vmw_stdu_destroy - Cleans up a vmw_screen_target_display_unit
1656  *
1657  *  @stdu:  Screen Target Display Unit to be destroyed
1658  *
1659  *  Clean up after vmw_stdu_init
1660  */
vmw_stdu_destroy(struct vmw_screen_target_display_unit * stdu)1661 static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu)
1662 {
1663 	vmw_du_cleanup(&stdu->base);
1664 	kfree(stdu);
1665 }
1666 
1667 
1668 
1669 /******************************************************************************
1670  * Screen Target Display KMS Functions
1671  *
1672  * These functions are called by the common KMS code in vmwgfx_kms.c
1673  *****************************************************************************/
1674 
1675 /**
1676  * vmw_kms_stdu_init_display - Initializes a Screen Target based display
1677  *
1678  * @dev_priv: VMW DRM device
1679  *
1680  * This function initialize a Screen Target based display device.  It checks
1681  * the capability bits to make sure the underlying hardware can support
1682  * screen targets, and then creates the maximum number of CRTCs, a.k.a Display
1683  * Units, as supported by the display hardware.
1684  *
1685  * RETURNS:
1686  * 0 on success, error code otherwise
1687  */
vmw_kms_stdu_init_display(struct vmw_private * dev_priv)1688 int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
1689 {
1690 	struct drm_device *dev = &dev_priv->drm;
1691 	int i, ret;
1692 
1693 
1694 	/* Do nothing if there's no support for MOBs */
1695 	if (!dev_priv->has_mob)
1696 		return -ENOSYS;
1697 
1698 	if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
1699 		return -ENOSYS;
1700 
1701 	dev_priv->active_display_unit = vmw_du_screen_target;
1702 
1703 	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
1704 		ret = vmw_stdu_init(dev_priv, i);
1705 
1706 		if (unlikely(ret != 0)) {
1707 			drm_err(&dev_priv->drm,
1708 				"Failed to initialize STDU %d", i);
1709 			return ret;
1710 		}
1711 	}
1712 
1713 	drm_mode_config_reset(dev);
1714 
1715 	return 0;
1716 }
1717