vmwgfx_ldu.c revision 1.2 1 /* $NetBSD: vmwgfx_ldu.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $ */
2
3 /**************************************************************************
4 *
5 * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
6 * All Rights Reserved.
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 1.2 2018/08/27 04:58:37 riastradh Exp $");
32
33 #include "vmwgfx_kms.h"
34 #include <drm/drm_plane_helper.h>
35
36
37 #define vmw_crtc_to_ldu(x) \
38 container_of(x, struct vmw_legacy_display_unit, base.crtc)
39 #define vmw_encoder_to_ldu(x) \
40 container_of(x, struct vmw_legacy_display_unit, base.encoder)
41 #define vmw_connector_to_ldu(x) \
42 container_of(x, struct vmw_legacy_display_unit, base.connector)
43
44 struct vmw_legacy_display {
45 struct list_head active;
46
47 unsigned num_active;
48 unsigned last_num_active;
49
50 struct vmw_framebuffer *fb;
51 };
52
53 /**
54 * Display unit using the legacy register interface.
55 */
56 struct vmw_legacy_display_unit {
57 struct vmw_display_unit base;
58
59 struct list_head active;
60 };
61
62 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
63 {
64 list_del_init(&ldu->active);
65 vmw_du_cleanup(&ldu->base);
66 kfree(ldu);
67 }
68
69
70 /*
71 * Legacy Display Unit CRTC functions
72 */
73
74 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
75 {
76 vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
77 }
78
79 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
80 {
81 struct vmw_legacy_display *lds = dev_priv->ldu_priv;
82 struct vmw_legacy_display_unit *entry;
83 struct vmw_display_unit *du = NULL;
84 struct drm_framebuffer *fb = NULL;
85 struct drm_crtc *crtc = NULL;
86 int i = 0, ret;
87
88 /* If there is no display topology the host just assumes
89 * that the guest will set the same layout as the host.
90 */
91 if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
92 int w = 0, h = 0;
93 list_for_each_entry(entry, &lds->active, active) {
94 crtc = &entry->base.crtc;
95 w = max(w, crtc->x + crtc->mode.hdisplay);
96 h = max(h, crtc->y + crtc->mode.vdisplay);
97 i++;
98 }
99
100 if (crtc == NULL)
101 return 0;
102 fb = entry->base.crtc.primary->fb;
103
104 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
105 fb->bits_per_pixel, fb->depth);
106 }
107
108 if (!list_empty(&lds->active)) {
109 entry = list_entry(lds->active.next, typeof(*entry), active);
110 fb = entry->base.crtc.primary->fb;
111
112 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
113 fb->bits_per_pixel, fb->depth);
114 }
115
116 /* Make sure we always show something. */
117 vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
118 lds->num_active ? lds->num_active : 1);
119
120 i = 0;
121 list_for_each_entry(entry, &lds->active, active) {
122 crtc = &entry->base.crtc;
123
124 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
125 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
126 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
127 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
128 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
129 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
130 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
131
132 i++;
133 }
134
135 BUG_ON(i != lds->num_active);
136
137 lds->last_num_active = lds->num_active;
138
139
140 /* Find the first du with a cursor. */
141 list_for_each_entry(entry, &lds->active, active) {
142 du = &entry->base;
143
144 if (!du->cursor_dmabuf)
145 continue;
146
147 ret = vmw_cursor_update_dmabuf(dev_priv,
148 du->cursor_dmabuf,
149 64, 64,
150 du->hotspot_x,
151 du->hotspot_y);
152 if (ret == 0)
153 break;
154
155 DRM_ERROR("Could not update cursor image\n");
156 }
157
158 return 0;
159 }
160
161 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
162 struct vmw_legacy_display_unit *ldu)
163 {
164 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
165 if (list_empty(&ldu->active))
166 return 0;
167
168 /* Must init otherwise list_empty(&ldu->active) will not work. */
169 list_del_init(&ldu->active);
170 if (--(ld->num_active) == 0) {
171 BUG_ON(!ld->fb);
172 if (ld->fb->unpin)
173 ld->fb->unpin(ld->fb);
174 ld->fb = NULL;
175 }
176
177 return 0;
178 }
179
180 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
181 struct vmw_legacy_display_unit *ldu,
182 struct vmw_framebuffer *vfb)
183 {
184 struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
185 struct vmw_legacy_display_unit *entry;
186 struct list_head *at;
187
188 BUG_ON(!ld->num_active && ld->fb);
189 if (vfb != ld->fb) {
190 if (ld->fb && ld->fb->unpin)
191 ld->fb->unpin(ld->fb);
192 if (vfb->pin)
193 vfb->pin(vfb);
194 ld->fb = vfb;
195 }
196
197 if (!list_empty(&ldu->active))
198 return 0;
199
200 at = &ld->active;
201 list_for_each_entry(entry, &ld->active, active) {
202 if (entry->base.unit > ldu->base.unit)
203 break;
204
205 at = &entry->active;
206 }
207
208 list_add(&ldu->active, at);
209
210 ld->num_active++;
211
212 return 0;
213 }
214
215 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
216 {
217 struct vmw_private *dev_priv;
218 struct vmw_legacy_display_unit *ldu;
219 struct drm_connector *connector;
220 struct drm_display_mode *mode;
221 struct drm_encoder *encoder;
222 struct vmw_framebuffer *vfb;
223 struct drm_framebuffer *fb;
224 struct drm_crtc *crtc;
225
226 if (!set)
227 return -EINVAL;
228
229 if (!set->crtc)
230 return -EINVAL;
231
232 /* get the ldu */
233 crtc = set->crtc;
234 ldu = vmw_crtc_to_ldu(crtc);
235 vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
236 dev_priv = vmw_priv(crtc->dev);
237
238 if (set->num_connectors > 1) {
239 DRM_ERROR("to many connectors\n");
240 return -EINVAL;
241 }
242
243 if (set->num_connectors == 1 &&
244 set->connectors[0] != &ldu->base.connector) {
245 DRM_ERROR("connector doesn't match %p %p\n",
246 set->connectors[0], &ldu->base.connector);
247 return -EINVAL;
248 }
249
250 /* ldu only supports one fb active at the time */
251 if (dev_priv->ldu_priv->fb && vfb &&
252 !(dev_priv->ldu_priv->num_active == 1 &&
253 !list_empty(&ldu->active)) &&
254 dev_priv->ldu_priv->fb != vfb) {
255 DRM_ERROR("Multiple framebuffers not supported\n");
256 return -EINVAL;
257 }
258
259 /* since they always map one to one these are safe */
260 connector = &ldu->base.connector;
261 encoder = &ldu->base.encoder;
262
263 /* should we turn the crtc off? */
264 if (set->num_connectors == 0 || !set->mode || !set->fb) {
265
266 connector->encoder = NULL;
267 encoder->crtc = NULL;
268 crtc->primary->fb = NULL;
269 crtc->enabled = false;
270
271 vmw_ldu_del_active(dev_priv, ldu);
272
273 return vmw_ldu_commit_list(dev_priv);
274 }
275
276
277 /* we now know we want to set a mode */
278 mode = set->mode;
279 fb = set->fb;
280
281 if (set->x + mode->hdisplay > fb->width ||
282 set->y + mode->vdisplay > fb->height) {
283 DRM_ERROR("set outside of framebuffer\n");
284 return -EINVAL;
285 }
286
287 vmw_svga_enable(dev_priv);
288
289 crtc->primary->fb = fb;
290 encoder->crtc = crtc;
291 connector->encoder = encoder;
292 crtc->x = set->x;
293 crtc->y = set->y;
294 crtc->mode = *mode;
295 crtc->enabled = true;
296
297 vmw_ldu_add_active(dev_priv, ldu, vfb);
298
299 return vmw_ldu_commit_list(dev_priv);
300 }
301
302 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
303 .save = vmw_du_crtc_save,
304 .restore = vmw_du_crtc_restore,
305 .cursor_set2 = vmw_du_crtc_cursor_set2,
306 .cursor_move = vmw_du_crtc_cursor_move,
307 .gamma_set = vmw_du_crtc_gamma_set,
308 .destroy = vmw_ldu_crtc_destroy,
309 .set_config = vmw_ldu_crtc_set_config,
310 };
311
312
313 /*
314 * Legacy Display Unit encoder functions
315 */
316
317 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
318 {
319 vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
320 }
321
322 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
323 .destroy = vmw_ldu_encoder_destroy,
324 };
325
326 /*
327 * Legacy Display Unit connector functions
328 */
329
330 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
331 {
332 vmw_ldu_destroy(vmw_connector_to_ldu(connector));
333 }
334
335 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
336 .dpms = vmw_du_connector_dpms,
337 .save = vmw_du_connector_save,
338 .restore = vmw_du_connector_restore,
339 .detect = vmw_du_connector_detect,
340 .fill_modes = vmw_du_connector_fill_modes,
341 .set_property = vmw_du_connector_set_property,
342 .destroy = vmw_ldu_connector_destroy,
343 };
344
345 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
346 {
347 struct vmw_legacy_display_unit *ldu;
348 struct drm_device *dev = dev_priv->dev;
349 struct drm_connector *connector;
350 struct drm_encoder *encoder;
351 struct drm_crtc *crtc;
352
353 ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
354 if (!ldu)
355 return -ENOMEM;
356
357 ldu->base.unit = unit;
358 crtc = &ldu->base.crtc;
359 encoder = &ldu->base.encoder;
360 connector = &ldu->base.connector;
361
362 INIT_LIST_HEAD(&ldu->active);
363
364 ldu->base.pref_active = (unit == 0);
365 ldu->base.pref_width = dev_priv->initial_width;
366 ldu->base.pref_height = dev_priv->initial_height;
367 ldu->base.pref_mode = NULL;
368 ldu->base.is_implicit = true;
369
370 drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
371 DRM_MODE_CONNECTOR_VIRTUAL);
372 connector->status = vmw_du_connector_detect(connector, true);
373
374 drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
375 DRM_MODE_ENCODER_VIRTUAL);
376 drm_mode_connector_attach_encoder(connector, encoder);
377 encoder->possible_crtcs = (1 << unit);
378 encoder->possible_clones = 0;
379
380 (void) drm_connector_register(connector);
381
382 drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
383
384 drm_mode_crtc_set_gamma_size(crtc, 256);
385
386 drm_object_attach_property(&connector->base,
387 dev->mode_config.dirty_info_property,
388 1);
389
390 return 0;
391 }
392
393 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
394 {
395 struct drm_device *dev = dev_priv->dev;
396 int i, ret;
397
398 if (dev_priv->ldu_priv) {
399 DRM_INFO("ldu system already on\n");
400 return -EINVAL;
401 }
402
403 dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
404 if (!dev_priv->ldu_priv)
405 return -ENOMEM;
406
407 INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
408 dev_priv->ldu_priv->num_active = 0;
409 dev_priv->ldu_priv->last_num_active = 0;
410 dev_priv->ldu_priv->fb = NULL;
411
412 /* for old hardware without multimon only enable one display */
413 if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
414 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
415 else
416 ret = drm_vblank_init(dev, 1);
417 if (ret != 0)
418 goto err_free;
419
420 ret = drm_mode_create_dirty_info_property(dev);
421 if (ret != 0)
422 goto err_vblank_cleanup;
423
424 if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
425 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
426 vmw_ldu_init(dev_priv, i);
427 else
428 vmw_ldu_init(dev_priv, 0);
429
430 dev_priv->active_display_unit = vmw_du_legacy;
431
432 DRM_INFO("Legacy Display Unit initialized\n");
433
434 return 0;
435
436 err_vblank_cleanup:
437 drm_vblank_cleanup(dev);
438 err_free:
439 kfree(dev_priv->ldu_priv);
440 dev_priv->ldu_priv = NULL;
441 return ret;
442 }
443
444 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
445 {
446 struct drm_device *dev = dev_priv->dev;
447
448 if (!dev_priv->ldu_priv)
449 return -ENOSYS;
450
451 drm_vblank_cleanup(dev);
452
453 BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
454
455 kfree(dev_priv->ldu_priv);
456
457 return 0;
458 }
459
460
461 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv,
462 struct vmw_framebuffer *framebuffer,
463 unsigned flags, unsigned color,
464 struct drm_clip_rect *clips,
465 unsigned num_clips, int increment)
466 {
467 size_t fifo_size;
468 int i;
469
470 struct {
471 uint32_t header;
472 SVGAFifoCmdUpdate body;
473 } *cmd;
474
475 fifo_size = sizeof(*cmd) * num_clips;
476 cmd = vmw_fifo_reserve(dev_priv, fifo_size);
477 if (unlikely(cmd == NULL)) {
478 DRM_ERROR("Fifo reserve failed.\n");
479 return -ENOMEM;
480 }
481
482 memset(cmd, 0, fifo_size);
483 for (i = 0; i < num_clips; i++, clips += increment) {
484 cmd[i].header = SVGA_CMD_UPDATE;
485 cmd[i].body.x = clips->x1;
486 cmd[i].body.y = clips->y1;
487 cmd[i].body.width = clips->x2 - clips->x1;
488 cmd[i].body.height = clips->y2 - clips->y1;
489 }
490
491 vmw_fifo_commit(dev_priv, fifo_size);
492 return 0;
493 }
494