1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2009-2023 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
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_bo.h"
29#include "vmwgfx_kms.h"
30
31#include <drm/drm_atomic.h>
32#include <drm/drm_atomic_helper.h>
33#include <drm/drm_fourcc.h>
34
35
36#define vmw_crtc_to_ldu(x) \
37 container_of(x, struct vmw_legacy_display_unit, base.crtc)
38#define vmw_encoder_to_ldu(x) \
39 container_of(x, struct vmw_legacy_display_unit, base.encoder)
40#define vmw_connector_to_ldu(x) \
41 container_of(x, struct vmw_legacy_display_unit, base.connector)
42
43struct vmw_legacy_display {
44 struct list_head active;
45
46 unsigned num_active;
47 unsigned last_num_active;
48
49 struct vmw_framebuffer *fb;
50};
51
52/*
53 * Display unit using the legacy register interface.
54 */
55struct vmw_legacy_display_unit {
56 struct vmw_display_unit base;
57
58 struct list_head active;
59};
60
61static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
62{
63 list_del_init(entry: &ldu->active);
64 vmw_du_cleanup(du: &ldu->base);
65 kfree(objp: ldu);
66}
67
68
69/*
70 * Legacy Display Unit CRTC functions
71 */
72
73static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
74{
75 vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
76}
77
78static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
79{
80 struct vmw_legacy_display *lds = dev_priv->ldu_priv;
81 struct vmw_legacy_display_unit *entry;
82 struct drm_framebuffer *fb = NULL;
83 struct drm_crtc *crtc = NULL;
84 int i;
85
86 /* If there is no display topology the host just assumes
87 * that the guest will set the same layout as the host.
88 */
89 if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
90 int w = 0, h = 0;
91 list_for_each_entry(entry, &lds->active, active) {
92 crtc = &entry->base.crtc;
93 w = max(w, crtc->x + crtc->mode.hdisplay);
94 h = max(h, crtc->y + crtc->mode.vdisplay);
95 }
96
97 if (crtc == NULL)
98 return 0;
99 fb = crtc->primary->state->fb;
100
101 return vmw_kms_write_svga(vmw_priv: dev_priv, width: w, height: h, pitch: fb->pitches[0],
102 bpp: fb->format->cpp[0] * 8,
103 depth: fb->format->depth);
104 }
105
106 if (!list_empty(head: &lds->active)) {
107 entry = list_entry(lds->active.next, typeof(*entry), active);
108 fb = entry->base.crtc.primary->state->fb;
109
110 vmw_kms_write_svga(vmw_priv: dev_priv, width: fb->width, height: fb->height, pitch: fb->pitches[0],
111 bpp: fb->format->cpp[0] * 8, depth: fb->format->depth);
112 }
113
114 /* Make sure we always show something. */
115 vmw_write(dev_priv, offset: SVGA_REG_NUM_GUEST_DISPLAYS,
116 value: lds->num_active ? lds->num_active : 1);
117
118 i = 0;
119 list_for_each_entry(entry, &lds->active, active) {
120 crtc = &entry->base.crtc;
121
122 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_ID, value: i);
123 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_IS_PRIMARY, value: !i);
124 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_POSITION_X, value: crtc->x);
125 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_POSITION_Y, value: crtc->y);
126 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_WIDTH, value: crtc->mode.hdisplay);
127 vmw_write(dev_priv, offset: SVGA_REG_DISPLAY_HEIGHT, value: crtc->mode.vdisplay);
128
129 i++;
130 }
131
132 BUG_ON(i != lds->num_active);
133
134 lds->last_num_active = lds->num_active;
135
136 return 0;
137}
138
139/*
140 * Pin the buffer in a location suitable for access by the
141 * display system.
142 */
143static int vmw_ldu_fb_pin(struct vmw_framebuffer *vfb)
144{
145 struct vmw_private *dev_priv = vmw_priv(dev: vfb->base.dev);
146 struct vmw_bo *buf;
147 int ret;
148
149 buf = vfb->bo ? vmw_framebuffer_to_vfbd(&vfb->base)->buffer :
150 vmw_framebuffer_to_vfbs(&vfb->base)->surface->res.guest_memory_bo;
151
152 if (!buf)
153 return 0;
154 WARN_ON(dev_priv->active_display_unit != vmw_du_legacy);
155
156 if (dev_priv->active_display_unit == vmw_du_legacy) {
157 vmw_overlay_pause_all(dev_priv);
158 ret = vmw_bo_pin_in_start_of_vram(vmw_priv: dev_priv, bo: buf, interruptible: false);
159 vmw_overlay_resume_all(dev_priv);
160 } else
161 ret = -EINVAL;
162
163 return ret;
164}
165
166static int vmw_ldu_fb_unpin(struct vmw_framebuffer *vfb)
167{
168 struct vmw_private *dev_priv = vmw_priv(dev: vfb->base.dev);
169 struct vmw_bo *buf;
170
171 buf = vfb->bo ? vmw_framebuffer_to_vfbd(&vfb->base)->buffer :
172 vmw_framebuffer_to_vfbs(&vfb->base)->surface->res.guest_memory_bo;
173
174 if (WARN_ON(!buf))
175 return 0;
176
177 return vmw_bo_unpin(vmw_priv: dev_priv, bo: buf, interruptible: false);
178}
179
180static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
181 struct vmw_legacy_display_unit *ldu)
182{
183 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
184 if (list_empty(head: &ldu->active))
185 return 0;
186
187 /* Must init otherwise list_empty(&ldu->active) will not work. */
188 list_del_init(entry: &ldu->active);
189 if (--(ld->num_active) == 0) {
190 BUG_ON(!ld->fb);
191 WARN_ON(vmw_ldu_fb_unpin(ld->fb));
192 ld->fb = NULL;
193 }
194
195 return 0;
196}
197
198static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
199 struct vmw_legacy_display_unit *ldu,
200 struct vmw_framebuffer *vfb)
201{
202 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
203 struct vmw_legacy_display_unit *entry;
204 struct list_head *at;
205
206 BUG_ON(!ld->num_active && ld->fb);
207 if (vfb != ld->fb) {
208 if (ld->fb)
209 WARN_ON(vmw_ldu_fb_unpin(ld->fb));
210 vmw_svga_enable(dev_priv: vmw_priv);
211 WARN_ON(vmw_ldu_fb_pin(vfb));
212 ld->fb = vfb;
213 }
214
215 if (!list_empty(head: &ldu->active))
216 return 0;
217
218 at = &ld->active;
219 list_for_each_entry(entry, &ld->active, active) {
220 if (entry->base.unit > ldu->base.unit)
221 break;
222
223 at = &entry->active;
224 }
225
226 list_add(new: &ldu->active, head: at);
227
228 ld->num_active++;
229
230 return 0;
231}
232
233/**
234 * vmw_ldu_crtc_mode_set_nofb - Enable svga
235 *
236 * @crtc: CRTC associated with the new screen
237 *
238 * For LDU, just enable the svga
239 */
240static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
241{
242}
243
244/**
245 * vmw_ldu_crtc_atomic_enable - Noop
246 *
247 * @crtc: CRTC associated with the new screen
248 * @state: Unused
249 *
250 * This is called after a mode set has been completed. Here's
251 * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
252 * but since for LDU the display plane is closely tied to the
253 * CRTC, it makes more sense to do those at plane update time.
254 */
255static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
256 struct drm_atomic_state *state)
257{
258}
259
260/**
261 * vmw_ldu_crtc_atomic_disable - Turns off CRTC
262 *
263 * @crtc: CRTC to be turned off
264 * @state: Unused
265 */
266static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
267 struct drm_atomic_state *state)
268{
269}
270
271static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
272 .gamma_set = vmw_du_crtc_gamma_set,
273 .destroy = vmw_ldu_crtc_destroy,
274 .reset = vmw_du_crtc_reset,
275 .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
276 .atomic_destroy_state = vmw_du_crtc_destroy_state,
277 .set_config = drm_atomic_helper_set_config,
278 .page_flip = drm_atomic_helper_page_flip,
279};
280
281
282/*
283 * Legacy Display Unit encoder functions
284 */
285
286static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
287{
288 vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
289}
290
291static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
292 .destroy = vmw_ldu_encoder_destroy,
293};
294
295/*
296 * Legacy Display Unit connector functions
297 */
298
299static void vmw_ldu_connector_destroy(struct drm_connector *connector)
300{
301 vmw_ldu_destroy(vmw_connector_to_ldu(connector));
302}
303
304static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
305 .dpms = vmw_du_connector_dpms,
306 .detect = vmw_du_connector_detect,
307 .fill_modes = drm_helper_probe_single_connector_modes,
308 .destroy = vmw_ldu_connector_destroy,
309 .reset = vmw_du_connector_reset,
310 .atomic_duplicate_state = vmw_du_connector_duplicate_state,
311 .atomic_destroy_state = vmw_du_connector_destroy_state,
312};
313
314static const struct
315drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
316 .get_modes = vmw_connector_get_modes,
317 .mode_valid = vmw_connector_mode_valid
318};
319
320static int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
321 struct vmw_framebuffer *framebuffer,
322 unsigned int flags, unsigned int color,
323 struct drm_mode_rect *clips,
324 unsigned int num_clips);
325
326/*
327 * Legacy Display Plane Functions
328 */
329
330static void
331vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
332 struct drm_atomic_state *state)
333{
334 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
335 plane);
336 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
337 plane);
338 struct vmw_private *dev_priv;
339 struct vmw_legacy_display_unit *ldu;
340 struct vmw_framebuffer *vfb;
341 struct drm_framebuffer *fb;
342 struct drm_crtc *crtc = new_state->crtc ?: old_state->crtc;
343
344 ldu = vmw_crtc_to_ldu(crtc);
345 dev_priv = vmw_priv(dev: plane->dev);
346 fb = new_state->fb;
347
348 vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
349
350 if (vfb)
351 vmw_ldu_add_active(vmw_priv: dev_priv, ldu, vfb);
352 else
353 vmw_ldu_del_active(vmw_priv: dev_priv, ldu);
354
355 vmw_ldu_commit_list(dev_priv);
356
357 if (vfb && vmw_cmd_supported(vmw: dev_priv)) {
358 struct drm_mode_rect fb_rect = {
359 .x1 = 0,
360 .y1 = 0,
361 .x2 = vfb->base.width,
362 .y2 = vfb->base.height
363 };
364 struct drm_mode_rect *damage_rects = drm_plane_get_damage_clips(state: new_state);
365 u32 rect_count = drm_plane_get_damage_clips_count(state: new_state);
366 int ret;
367
368 if (!damage_rects) {
369 damage_rects = &fb_rect;
370 rect_count = 1;
371 }
372
373 ret = vmw_kms_ldu_do_bo_dirty(dev_priv, framebuffer: vfb, flags: 0, color: 0, clips: damage_rects, num_clips: rect_count);
374
375 drm_WARN_ONCE(plane->dev, ret,
376 "vmw_kms_ldu_do_bo_dirty failed with: ret=%d\n", ret);
377
378 vmw_cmd_flush(dev_priv, interruptible: false);
379 }
380}
381
382static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
383 .update_plane = drm_atomic_helper_update_plane,
384 .disable_plane = drm_atomic_helper_disable_plane,
385 .destroy = vmw_du_primary_plane_destroy,
386 .reset = vmw_du_plane_reset,
387 .atomic_duplicate_state = vmw_du_plane_duplicate_state,
388 .atomic_destroy_state = vmw_du_plane_destroy_state,
389};
390
391static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
392 .update_plane = drm_atomic_helper_update_plane,
393 .disable_plane = drm_atomic_helper_disable_plane,
394 .destroy = vmw_du_cursor_plane_destroy,
395 .reset = vmw_du_plane_reset,
396 .atomic_duplicate_state = vmw_du_plane_duplicate_state,
397 .atomic_destroy_state = vmw_du_plane_destroy_state,
398};
399
400/*
401 * Atomic Helpers
402 */
403static const struct
404drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
405 .atomic_check = vmw_du_cursor_plane_atomic_check,
406 .atomic_update = vmw_du_cursor_plane_atomic_update,
407 .prepare_fb = vmw_du_cursor_plane_prepare_fb,
408 .cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
409};
410
411static const struct
412drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
413 .atomic_check = vmw_du_primary_plane_atomic_check,
414 .atomic_update = vmw_ldu_primary_plane_atomic_update,
415};
416
417static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
418 .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
419 .atomic_check = vmw_du_crtc_atomic_check,
420 .atomic_begin = vmw_du_crtc_atomic_begin,
421 .atomic_flush = vmw_du_crtc_atomic_flush,
422 .atomic_enable = vmw_ldu_crtc_atomic_enable,
423 .atomic_disable = vmw_ldu_crtc_atomic_disable,
424};
425
426
427static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
428{
429 struct vmw_legacy_display_unit *ldu;
430 struct drm_device *dev = &dev_priv->drm;
431 struct drm_connector *connector;
432 struct drm_encoder *encoder;
433 struct drm_plane *primary;
434 struct vmw_cursor_plane *cursor;
435 struct drm_crtc *crtc;
436 int ret;
437
438 ldu = kzalloc(size: sizeof(*ldu), GFP_KERNEL);
439 if (!ldu)
440 return -ENOMEM;
441
442 ldu->base.unit = unit;
443 crtc = &ldu->base.crtc;
444 encoder = &ldu->base.encoder;
445 connector = &ldu->base.connector;
446 primary = &ldu->base.primary;
447 cursor = &ldu->base.cursor;
448
449 INIT_LIST_HEAD(list: &ldu->active);
450
451 ldu->base.pref_active = (unit == 0);
452 ldu->base.pref_width = dev_priv->initial_width;
453 ldu->base.pref_height = dev_priv->initial_height;
454
455 /*
456 * Remove this after enabling atomic because property values can
457 * only exist in a state object
458 */
459 ldu->base.is_implicit = true;
460
461 /* Initialize primary plane */
462 ret = drm_universal_plane_init(dev, plane: primary,
463 possible_crtcs: 0, funcs: &vmw_ldu_plane_funcs,
464 formats: vmw_primary_plane_formats,
465 ARRAY_SIZE(vmw_primary_plane_formats),
466 NULL, type: DRM_PLANE_TYPE_PRIMARY, NULL);
467 if (ret) {
468 DRM_ERROR("Failed to initialize primary plane");
469 goto err_free;
470 }
471
472 drm_plane_helper_add(plane: primary, funcs: &vmw_ldu_primary_plane_helper_funcs);
473
474 /*
475 * We're going to be using traces and software cursors
476 */
477 if (vmw_cmd_supported(vmw: dev_priv)) {
478 /* Initialize cursor plane */
479 ret = drm_universal_plane_init(dev, plane: &cursor->base,
480 possible_crtcs: 0, funcs: &vmw_ldu_cursor_funcs,
481 formats: vmw_cursor_plane_formats,
482 ARRAY_SIZE(vmw_cursor_plane_formats),
483 NULL, type: DRM_PLANE_TYPE_CURSOR, NULL);
484 if (ret) {
485 DRM_ERROR("Failed to initialize cursor plane");
486 drm_plane_cleanup(plane: &ldu->base.primary);
487 goto err_free;
488 }
489
490 drm_plane_helper_add(plane: &cursor->base, funcs: &vmw_ldu_cursor_plane_helper_funcs);
491 }
492
493 ret = drm_connector_init(dev, connector, funcs: &vmw_legacy_connector_funcs,
494 DRM_MODE_CONNECTOR_VIRTUAL);
495 if (ret) {
496 DRM_ERROR("Failed to initialize connector\n");
497 goto err_free;
498 }
499
500 drm_connector_helper_add(connector, funcs: &vmw_ldu_connector_helper_funcs);
501 connector->status = vmw_du_connector_detect(connector, force: true);
502
503 ret = drm_encoder_init(dev, encoder, funcs: &vmw_legacy_encoder_funcs,
504 DRM_MODE_ENCODER_VIRTUAL, NULL);
505 if (ret) {
506 DRM_ERROR("Failed to initialize encoder\n");
507 goto err_free_connector;
508 }
509
510 (void) drm_connector_attach_encoder(connector, encoder);
511 encoder->possible_crtcs = (1 << unit);
512 encoder->possible_clones = 0;
513
514 ret = drm_connector_register(connector);
515 if (ret) {
516 DRM_ERROR("Failed to register connector\n");
517 goto err_free_encoder;
518 }
519
520 ret = drm_crtc_init_with_planes(dev, crtc, primary,
521 cursor: vmw_cmd_supported(vmw: dev_priv) ? &cursor->base : NULL,
522 funcs: &vmw_legacy_crtc_funcs, NULL);
523 if (ret) {
524 DRM_ERROR("Failed to initialize CRTC\n");
525 goto err_free_unregister;
526 }
527
528 drm_crtc_helper_add(crtc, funcs: &vmw_ldu_crtc_helper_funcs);
529
530 drm_mode_crtc_set_gamma_size(crtc, gamma_size: 256);
531
532 drm_object_attach_property(obj: &connector->base,
533 property: dev_priv->hotplug_mode_update_property, init_val: 1);
534 drm_object_attach_property(obj: &connector->base,
535 property: dev->mode_config.suggested_x_property, init_val: 0);
536 drm_object_attach_property(obj: &connector->base,
537 property: dev->mode_config.suggested_y_property, init_val: 0);
538 if (dev_priv->implicit_placement_property)
539 drm_object_attach_property
540 (obj: &connector->base,
541 property: dev_priv->implicit_placement_property,
542 init_val: 1);
543
544 return 0;
545
546err_free_unregister:
547 drm_connector_unregister(connector);
548err_free_encoder:
549 drm_encoder_cleanup(encoder);
550err_free_connector:
551 drm_connector_cleanup(connector);
552err_free:
553 kfree(objp: ldu);
554 return ret;
555}
556
557int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
558{
559 struct drm_device *dev = &dev_priv->drm;
560 int i, ret;
561 int num_display_units = (dev_priv->capabilities & SVGA_CAP_MULTIMON) ?
562 VMWGFX_NUM_DISPLAY_UNITS : 1;
563
564 if (unlikely(dev_priv->ldu_priv)) {
565 return -EINVAL;
566 }
567
568 dev_priv->ldu_priv = kmalloc(size: sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
569 if (!dev_priv->ldu_priv)
570 return -ENOMEM;
571
572 INIT_LIST_HEAD(list: &dev_priv->ldu_priv->active);
573 dev_priv->ldu_priv->num_active = 0;
574 dev_priv->ldu_priv->last_num_active = 0;
575 dev_priv->ldu_priv->fb = NULL;
576
577 vmw_kms_create_implicit_placement_property(dev_priv);
578
579 for (i = 0; i < num_display_units; ++i) {
580 ret = vmw_ldu_init(dev_priv, unit: i);
581 if (ret != 0)
582 goto err_free;
583 }
584
585 dev_priv->active_display_unit = vmw_du_legacy;
586
587 drm_mode_config_reset(dev);
588
589 return 0;
590
591err_free:
592 kfree(objp: dev_priv->ldu_priv);
593 dev_priv->ldu_priv = NULL;
594 return ret;
595}
596
597int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
598{
599 if (!dev_priv->ldu_priv)
600 return -ENOSYS;
601
602 BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
603
604 kfree(objp: dev_priv->ldu_priv);
605
606 return 0;
607}
608
609
610static int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
611 struct vmw_framebuffer *framebuffer,
612 unsigned int flags, unsigned int color,
613 struct drm_mode_rect *clips,
614 unsigned int num_clips)
615{
616 size_t fifo_size;
617 int i;
618
619 struct {
620 uint32_t header;
621 SVGAFifoCmdUpdate body;
622 } *cmd;
623
624 fifo_size = sizeof(*cmd) * num_clips;
625 cmd = VMW_CMD_RESERVE(dev_priv, fifo_size);
626 if (unlikely(cmd == NULL))
627 return -ENOMEM;
628
629 memset(cmd, 0, fifo_size);
630 for (i = 0; i < num_clips; i++, clips++) {
631 cmd[i].header = SVGA_CMD_UPDATE;
632 cmd[i].body.x = clips->x1;
633 cmd[i].body.y = clips->y1;
634 cmd[i].body.width = clips->x2 - clips->x1;
635 cmd[i].body.height = clips->y2 - clips->y1;
636 }
637
638 vmw_cmd_commit(dev_priv, bytes: fifo_size);
639 return 0;
640}
641

source code of linux/drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c