1 /* $NetBSD: vmwgfx_ldu.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $ */
2
3 // SPDX-License-Identifier: GPL-2.0 OR MIT
4 /**************************************************************************
5 *
6 * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
26 * USE OR OTHER DEALINGS IN THE SOFTWARE.
27 *
28 **************************************************************************/
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_ldu.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $");
32
33 #include <drm/drm_atomic.h>
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_fourcc.h>
36 #include <drm/drm_plane_helper.h>
37 #include <drm/drm_vblank.h>
38
39 #include "vmwgfx_kms.h"
40
41 #define vmw_crtc_to_ldu(x) \
42 container_of(x, struct vmw_legacy_display_unit, base.crtc)
43 #define vmw_encoder_to_ldu(x) \
44 container_of(x, struct vmw_legacy_display_unit, base.encoder)
45 #define vmw_connector_to_ldu(x) \
46 container_of(x, struct vmw_legacy_display_unit, base.connector)
47
48 struct vmw_legacy_display {
49 struct list_head active;
50
51 unsigned num_active;
52 unsigned last_num_active;
53
54 struct vmw_framebuffer *fb;
55 };
56
57 /**
58 * Display unit using the legacy register interface.
59 */
60 struct vmw_legacy_display_unit {
61 struct vmw_display_unit base;
62
63 struct list_head active;
64 };
65
vmw_ldu_destroy(struct vmw_legacy_display_unit * ldu)66 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
67 {
68 list_del_init(&ldu->active);
69 vmw_du_cleanup(&ldu->base);
70 kfree(ldu);
71 }
72
73
74 /*
75 * Legacy Display Unit CRTC functions
76 */
77
vmw_ldu_crtc_destroy(struct drm_crtc * crtc)78 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
79 {
80 vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
81 }
82
vmw_ldu_commit_list(struct vmw_private * dev_priv)83 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
84 {
85 struct vmw_legacy_display *lds = dev_priv->ldu_priv;
86 struct vmw_legacy_display_unit *entry;
87 struct drm_framebuffer *fb = NULL;
88 struct drm_crtc *crtc = NULL;
89 int i = 0;
90
91 /* If there is no display topology the host just assumes
92 * that the guest will set the same layout as the host.
93 */
94 if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
95 int w = 0, h = 0;
96 list_for_each_entry(entry, &lds->active, active) {
97 crtc = &entry->base.crtc;
98 w = max(w, crtc->x + crtc->mode.hdisplay);
99 h = max(h, crtc->y + crtc->mode.vdisplay);
100 i++;
101 }
102
103 if (crtc == NULL)
104 return 0;
105 fb = entry->base.crtc.primary->state->fb;
106
107 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
108 fb->format->cpp[0] * 8,
109 fb->format->depth);
110 }
111
112 if (!list_empty(&lds->active)) {
113 entry = list_entry(lds->active.next, typeof(*entry), active);
114 fb = entry->base.crtc.primary->state->fb;
115
116 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
117 fb->format->cpp[0] * 8, fb->format->depth);
118 }
119
120 /* Make sure we always show something. */
121 vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
122 lds->num_active ? lds->num_active : 1);
123
124 i = 0;
125 list_for_each_entry(entry, &lds->active, active) {
126 crtc = &entry->base.crtc;
127
128 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
129 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
130 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
131 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
132 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
133 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
134 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
135
136 i++;
137 }
138
139 BUG_ON(i != lds->num_active);
140
141 lds->last_num_active = lds->num_active;
142
143 return 0;
144 }
145
vmw_ldu_del_active(struct vmw_private * vmw_priv,struct vmw_legacy_display_unit * ldu)146 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
147 struct vmw_legacy_display_unit *ldu)
148 {
149 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
150 if (list_empty(&ldu->active))
151 return 0;
152
153 /* Must init otherwise list_empty(&ldu->active) will not work. */
154 list_del_init(&ldu->active);
155 if (--(ld->num_active) == 0) {
156 BUG_ON(!ld->fb);
157 if (ld->fb->unpin)
158 ld->fb->unpin(ld->fb);
159 ld->fb = NULL;
160 }
161
162 return 0;
163 }
164
vmw_ldu_add_active(struct vmw_private * vmw_priv,struct vmw_legacy_display_unit * ldu,struct vmw_framebuffer * vfb)165 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
166 struct vmw_legacy_display_unit *ldu,
167 struct vmw_framebuffer *vfb)
168 {
169 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
170 struct vmw_legacy_display_unit *entry;
171 struct list_head *at;
172
173 BUG_ON(!ld->num_active && ld->fb);
174 if (vfb != ld->fb) {
175 if (ld->fb && ld->fb->unpin)
176 ld->fb->unpin(ld->fb);
177 vmw_svga_enable(vmw_priv);
178 if (vfb->pin)
179 vfb->pin(vfb);
180 ld->fb = vfb;
181 }
182
183 if (!list_empty(&ldu->active))
184 return 0;
185
186 at = &ld->active;
187 list_for_each_entry(entry, &ld->active, active) {
188 if (entry->base.unit > ldu->base.unit)
189 break;
190
191 at = &entry->active;
192 }
193
194 list_add(&ldu->active, at);
195
196 ld->num_active++;
197
198 return 0;
199 }
200
201 /**
202 * vmw_ldu_crtc_mode_set_nofb - Enable svga
203 *
204 * @crtc: CRTC associated with the new screen
205 *
206 * For LDU, just enable the svga
207 */
vmw_ldu_crtc_mode_set_nofb(struct drm_crtc * crtc)208 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
209 {
210 }
211
212 /**
213 * vmw_ldu_crtc_atomic_enable - Noop
214 *
215 * @crtc: CRTC associated with the new screen
216 *
217 * This is called after a mode set has been completed. Here's
218 * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
219 * but since for LDU the display plane is closely tied to the
220 * CRTC, it makes more sense to do those at plane update time.
221 */
vmw_ldu_crtc_atomic_enable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)222 static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
223 struct drm_crtc_state *old_state)
224 {
225 }
226
227 /**
228 * vmw_ldu_crtc_atomic_disable - Turns off CRTC
229 *
230 * @crtc: CRTC to be turned off
231 */
vmw_ldu_crtc_atomic_disable(struct drm_crtc * crtc,struct drm_crtc_state * old_state)232 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
233 struct drm_crtc_state *old_state)
234 {
235 }
236
237 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
238 .gamma_set = vmw_du_crtc_gamma_set,
239 .destroy = vmw_ldu_crtc_destroy,
240 .reset = vmw_du_crtc_reset,
241 .atomic_duplicate_state = vmw_du_crtc_duplicate_state,
242 .atomic_destroy_state = vmw_du_crtc_destroy_state,
243 .set_config = drm_atomic_helper_set_config,
244 };
245
246
247 /*
248 * Legacy Display Unit encoder functions
249 */
250
vmw_ldu_encoder_destroy(struct drm_encoder * encoder)251 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
252 {
253 vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
254 }
255
256 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
257 .destroy = vmw_ldu_encoder_destroy,
258 };
259
260 /*
261 * Legacy Display Unit connector functions
262 */
263
vmw_ldu_connector_destroy(struct drm_connector * connector)264 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
265 {
266 vmw_ldu_destroy(vmw_connector_to_ldu(connector));
267 }
268
269 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
270 .dpms = vmw_du_connector_dpms,
271 .detect = vmw_du_connector_detect,
272 .fill_modes = vmw_du_connector_fill_modes,
273 .destroy = vmw_ldu_connector_destroy,
274 .reset = vmw_du_connector_reset,
275 .atomic_duplicate_state = vmw_du_connector_duplicate_state,
276 .atomic_destroy_state = vmw_du_connector_destroy_state,
277 };
278
279 static const struct
280 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
281 };
282
283 /*
284 * Legacy Display Plane Functions
285 */
286
287 static void
vmw_ldu_primary_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)288 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
289 struct drm_plane_state *old_state)
290 {
291 struct vmw_private *dev_priv;
292 struct vmw_legacy_display_unit *ldu;
293 struct vmw_framebuffer *vfb;
294 struct drm_framebuffer *fb;
295 struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
296
297
298 ldu = vmw_crtc_to_ldu(crtc);
299 dev_priv = vmw_priv(plane->dev);
300 fb = plane->state->fb;
301
302 vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
303
304 if (vfb)
305 vmw_ldu_add_active(dev_priv, ldu, vfb);
306 else
307 vmw_ldu_del_active(dev_priv, ldu);
308
309 vmw_ldu_commit_list(dev_priv);
310 }
311
312
313 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
314 .update_plane = drm_atomic_helper_update_plane,
315 .disable_plane = drm_atomic_helper_disable_plane,
316 .destroy = vmw_du_primary_plane_destroy,
317 .reset = vmw_du_plane_reset,
318 .atomic_duplicate_state = vmw_du_plane_duplicate_state,
319 .atomic_destroy_state = vmw_du_plane_destroy_state,
320 };
321
322 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
323 .update_plane = drm_atomic_helper_update_plane,
324 .disable_plane = drm_atomic_helper_disable_plane,
325 .destroy = vmw_du_cursor_plane_destroy,
326 .reset = vmw_du_plane_reset,
327 .atomic_duplicate_state = vmw_du_plane_duplicate_state,
328 .atomic_destroy_state = vmw_du_plane_destroy_state,
329 };
330
331 /*
332 * Atomic Helpers
333 */
334 static const struct
335 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
336 .atomic_check = vmw_du_cursor_plane_atomic_check,
337 .atomic_update = vmw_du_cursor_plane_atomic_update,
338 .prepare_fb = vmw_du_cursor_plane_prepare_fb,
339 .cleanup_fb = vmw_du_plane_cleanup_fb,
340 };
341
342 static const struct
343 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
344 .atomic_check = vmw_du_primary_plane_atomic_check,
345 .atomic_update = vmw_ldu_primary_plane_atomic_update,
346 };
347
348 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
349 .mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
350 .atomic_check = vmw_du_crtc_atomic_check,
351 .atomic_begin = vmw_du_crtc_atomic_begin,
352 .atomic_flush = vmw_du_crtc_atomic_flush,
353 .atomic_enable = vmw_ldu_crtc_atomic_enable,
354 .atomic_disable = vmw_ldu_crtc_atomic_disable,
355 };
356
357
vmw_ldu_init(struct vmw_private * dev_priv,unsigned unit)358 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
359 {
360 struct vmw_legacy_display_unit *ldu;
361 struct drm_device *dev = dev_priv->dev;
362 struct drm_connector *connector;
363 struct drm_encoder *encoder;
364 struct drm_plane *primary, *cursor;
365 struct drm_crtc *crtc;
366 int ret;
367
368 ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
369 if (!ldu)
370 return -ENOMEM;
371
372 ldu->base.unit = unit;
373 crtc = &ldu->base.crtc;
374 encoder = &ldu->base.encoder;
375 connector = &ldu->base.connector;
376 primary = &ldu->base.primary;
377 cursor = &ldu->base.cursor;
378
379 INIT_LIST_HEAD(&ldu->active);
380
381 ldu->base.pref_active = (unit == 0);
382 ldu->base.pref_width = dev_priv->initial_width;
383 ldu->base.pref_height = dev_priv->initial_height;
384 ldu->base.pref_mode = NULL;
385
386 /*
387 * Remove this after enabling atomic because property values can
388 * only exist in a state object
389 */
390 ldu->base.is_implicit = true;
391
392 /* Initialize primary plane */
393 vmw_du_plane_reset(primary);
394
395 ret = drm_universal_plane_init(dev, &ldu->base.primary,
396 0, &vmw_ldu_plane_funcs,
397 vmw_primary_plane_formats,
398 ARRAY_SIZE(vmw_primary_plane_formats),
399 NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
400 if (ret) {
401 DRM_ERROR("Failed to initialize primary plane");
402 goto err_free;
403 }
404
405 drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
406
407 /* Initialize cursor plane */
408 vmw_du_plane_reset(cursor);
409
410 ret = drm_universal_plane_init(dev, &ldu->base.cursor,
411 0, &vmw_ldu_cursor_funcs,
412 vmw_cursor_plane_formats,
413 ARRAY_SIZE(vmw_cursor_plane_formats),
414 NULL, DRM_PLANE_TYPE_CURSOR, NULL);
415 if (ret) {
416 DRM_ERROR("Failed to initialize cursor plane");
417 drm_plane_cleanup(&ldu->base.primary);
418 goto err_free;
419 }
420
421 drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
422
423 vmw_du_connector_reset(connector);
424 ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
425 DRM_MODE_CONNECTOR_VIRTUAL);
426 if (ret) {
427 DRM_ERROR("Failed to initialize connector\n");
428 goto err_free;
429 }
430
431 drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
432 connector->status = vmw_du_connector_detect(connector, true);
433
434 ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
435 DRM_MODE_ENCODER_VIRTUAL, NULL);
436 if (ret) {
437 DRM_ERROR("Failed to initialize encoder\n");
438 goto err_free_connector;
439 }
440
441 (void) drm_connector_attach_encoder(connector, encoder);
442 encoder->possible_crtcs = (1 << unit);
443 encoder->possible_clones = 0;
444
445 ret = drm_connector_register(connector);
446 if (ret) {
447 DRM_ERROR("Failed to register connector\n");
448 goto err_free_encoder;
449 }
450
451 vmw_du_crtc_reset(crtc);
452 ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
453 &ldu->base.cursor,
454 &vmw_legacy_crtc_funcs, NULL);
455 if (ret) {
456 DRM_ERROR("Failed to initialize CRTC\n");
457 goto err_free_unregister;
458 }
459
460 drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
461
462 drm_mode_crtc_set_gamma_size(crtc, 256);
463
464 drm_object_attach_property(&connector->base,
465 dev_priv->hotplug_mode_update_property, 1);
466 drm_object_attach_property(&connector->base,
467 dev->mode_config.suggested_x_property, 0);
468 drm_object_attach_property(&connector->base,
469 dev->mode_config.suggested_y_property, 0);
470 if (dev_priv->implicit_placement_property)
471 drm_object_attach_property
472 (&connector->base,
473 dev_priv->implicit_placement_property,
474 1);
475
476 return 0;
477
478 err_free_unregister:
479 drm_connector_unregister(connector);
480 err_free_encoder:
481 drm_encoder_cleanup(encoder);
482 err_free_connector:
483 drm_connector_cleanup(connector);
484 err_free:
485 kfree(ldu);
486 return ret;
487 }
488
vmw_kms_ldu_init_display(struct vmw_private * dev_priv)489 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
490 {
491 struct drm_device *dev = dev_priv->dev;
492 int i, ret;
493
494 if (dev_priv->ldu_priv) {
495 DRM_INFO("ldu system already on\n");
496 return -EINVAL;
497 }
498
499 dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
500 if (!dev_priv->ldu_priv)
501 return -ENOMEM;
502
503 INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
504 dev_priv->ldu_priv->num_active = 0;
505 dev_priv->ldu_priv->last_num_active = 0;
506 dev_priv->ldu_priv->fb = NULL;
507
508 /* for old hardware without multimon only enable one display */
509 if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
510 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
511 else
512 ret = drm_vblank_init(dev, 1);
513 if (ret != 0)
514 goto err_free;
515
516 vmw_kms_create_implicit_placement_property(dev_priv);
517
518 if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
519 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
520 vmw_ldu_init(dev_priv, i);
521 else
522 vmw_ldu_init(dev_priv, 0);
523
524 dev_priv->active_display_unit = vmw_du_legacy;
525
526 DRM_INFO("Legacy Display Unit initialized\n");
527
528 return 0;
529
530 err_free:
531 kfree(dev_priv->ldu_priv);
532 dev_priv->ldu_priv = NULL;
533 return ret;
534 }
535
vmw_kms_ldu_close_display(struct vmw_private * dev_priv)536 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
537 {
538 if (!dev_priv->ldu_priv)
539 return -ENOSYS;
540
541 BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
542
543 kfree(dev_priv->ldu_priv);
544
545 return 0;
546 }
547
548
vmw_kms_ldu_do_bo_dirty(struct vmw_private * dev_priv,struct vmw_framebuffer * framebuffer,unsigned int flags,unsigned int color,struct drm_clip_rect * clips,unsigned int num_clips,int increment)549 int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
550 struct vmw_framebuffer *framebuffer,
551 unsigned int flags, unsigned int color,
552 struct drm_clip_rect *clips,
553 unsigned int num_clips, int increment)
554 {
555 size_t fifo_size;
556 int i;
557
558 struct {
559 uint32_t header;
560 SVGAFifoCmdUpdate body;
561 } *cmd;
562
563 fifo_size = sizeof(*cmd) * num_clips;
564 cmd = VMW_FIFO_RESERVE(dev_priv, fifo_size);
565 if (unlikely(cmd == NULL))
566 return -ENOMEM;
567
568 memset(cmd, 0, fifo_size);
569 for (i = 0; i < num_clips; i++, clips += increment) {
570 cmd[i].header = SVGA_CMD_UPDATE;
571 cmd[i].body.x = clips->x1;
572 cmd[i].body.y = clips->y1;
573 cmd[i].body.width = clips->x2 - clips->x1;
574 cmd[i].body.height = clips->y2 - clips->y1;
575 }
576
577 vmw_fifo_commit(dev_priv, fifo_size);
578 return 0;
579 }
580