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1/*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#include <drm/drm_mode_config.h>
24#include <drm/drmP.h>
25
26#include "drm_crtc_internal.h"
27#include "drm_internal.h"
28
29int drm_modeset_register_all(struct drm_device *dev)
30{
31 int ret;
32
33 ret = drm_plane_register_all(dev);
34 if (ret)
35 goto err_plane;
36
37 ret = drm_crtc_register_all(dev);
38 if (ret)
39 goto err_crtc;
40
41 ret = drm_encoder_register_all(dev);
42 if (ret)
43 goto err_encoder;
44
45 ret = drm_connector_register_all(dev);
46 if (ret)
47 goto err_connector;
48
49 return 0;
50
51err_connector:
52 drm_encoder_unregister_all(dev);
53err_encoder:
54 drm_crtc_unregister_all(dev);
55err_crtc:
56 drm_plane_unregister_all(dev);
57err_plane:
58 return ret;
59}
60
61void drm_modeset_unregister_all(struct drm_device *dev)
62{
63 drm_connector_unregister_all(dev);
64 drm_encoder_unregister_all(dev);
65 drm_crtc_unregister_all(dev);
66 drm_plane_unregister_all(dev);
67}
68
69/**
70 * drm_mode_getresources - get graphics configuration
71 * @dev: drm device for the ioctl
72 * @data: data pointer for the ioctl
73 * @file_priv: drm file for the ioctl call
74 *
75 * Construct a set of configuration description structures and return
76 * them to the user, including CRTC, connector and framebuffer configuration.
77 *
78 * Called by the user via ioctl.
79 *
80 * Returns:
81 * Zero on success, negative errno on failure.
82 */
83int drm_mode_getresources(struct drm_device *dev, void *data,
84 struct drm_file *file_priv)
85{
86 struct drm_mode_card_res *card_res = data;
87 struct list_head *lh;
88 struct drm_framebuffer *fb;
89 struct drm_connector *connector;
90 struct drm_crtc *crtc;
91 struct drm_encoder *encoder;
92 int ret = 0;
93 int connector_count = 0;
94 int crtc_count = 0;
95 int fb_count = 0;
96 int encoder_count = 0;
97 int copied = 0;
98 uint32_t __user *fb_id;
99 uint32_t __user *crtc_id;
100 uint32_t __user *connector_id;
101 uint32_t __user *encoder_id;
102
103 if (!drm_core_check_feature(dev, DRIVER_MODESET))
104 return -EINVAL;
105
106
107 mutex_lock(&file_priv->fbs_lock);
108 /*
109 * For the non-control nodes we need to limit the list of resources
110 * by IDs in the group list for this node
111 */
112 list_for_each(lh, &file_priv->fbs)
113 fb_count++;
114
115 /* handle this in 4 parts */
116 /* FBs */
117 if (card_res->count_fbs >= fb_count) {
118 copied = 0;
119 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
120 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
121 if (put_user(fb->base.id, fb_id + copied)) {
122 mutex_unlock(&file_priv->fbs_lock);
123 return -EFAULT;
124 }
125 copied++;
126 }
127 }
128 card_res->count_fbs = fb_count;
129 mutex_unlock(&file_priv->fbs_lock);
130
131 /* mode_config.mutex protects the connector list against e.g. DP MST
132 * connector hot-adding. CRTC/Plane lists are invariant. */
133 mutex_lock(&dev->mode_config.mutex);
134 drm_for_each_crtc(crtc, dev)
135 crtc_count++;
136
137 drm_for_each_connector(connector, dev)
138 connector_count++;
139
140 drm_for_each_encoder(encoder, dev)
141 encoder_count++;
142
143 card_res->max_height = dev->mode_config.max_height;
144 card_res->min_height = dev->mode_config.min_height;
145 card_res->max_width = dev->mode_config.max_width;
146 card_res->min_width = dev->mode_config.min_width;
147
148 /* CRTCs */
149 if (card_res->count_crtcs >= crtc_count) {
150 copied = 0;
151 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
152 drm_for_each_crtc(crtc, dev) {
153 if (put_user(crtc->base.id, crtc_id + copied)) {
154 ret = -EFAULT;
155 goto out;
156 }
157 copied++;
158 }
159 }
160 card_res->count_crtcs = crtc_count;
161
162 /* Encoders */
163 if (card_res->count_encoders >= encoder_count) {
164 copied = 0;
165 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
166 drm_for_each_encoder(encoder, dev) {
167 if (put_user(encoder->base.id, encoder_id +
168 copied)) {
169 ret = -EFAULT;
170 goto out;
171 }
172 copied++;
173 }
174 }
175 card_res->count_encoders = encoder_count;
176
177 /* Connectors */
178 if (card_res->count_connectors >= connector_count) {
179 copied = 0;
180 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
181 drm_for_each_connector(connector, dev) {
182 if (put_user(connector->base.id,
183 connector_id + copied)) {
184 ret = -EFAULT;
185 goto out;
186 }
187 copied++;
188 }
189 }
190 card_res->count_connectors = connector_count;
191
192out:
193 mutex_unlock(&dev->mode_config.mutex);
194 return ret;
195}
196
197/**
198 * drm_mode_config_reset - call ->reset callbacks
199 * @dev: drm device
200 *
201 * This functions calls all the crtc's, encoder's and connector's ->reset
202 * callback. Drivers can use this in e.g. their driver load or resume code to
203 * reset hardware and software state.
204 */
205void drm_mode_config_reset(struct drm_device *dev)
206{
207 struct drm_crtc *crtc;
208 struct drm_plane *plane;
209 struct drm_encoder *encoder;
210 struct drm_connector *connector;
211
212 drm_for_each_plane(plane, dev)
213 if (plane->funcs->reset)
214 plane->funcs->reset(plane);
215
216 drm_for_each_crtc(crtc, dev)
217 if (crtc->funcs->reset)
218 crtc->funcs->reset(crtc);
219
220 drm_for_each_encoder(encoder, dev)
221 if (encoder->funcs->reset)
222 encoder->funcs->reset(encoder);
223
224 mutex_lock(&dev->mode_config.mutex);
225 drm_for_each_connector(connector, dev)
226 if (connector->funcs->reset)
227 connector->funcs->reset(connector);
228 mutex_unlock(&dev->mode_config.mutex);
229}
230EXPORT_SYMBOL(drm_mode_config_reset);
231
232/*
233 * Global properties
234 */
235static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
236 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
237 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
238 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
239};
240
241static int drm_mode_create_standard_properties(struct drm_device *dev)
242{
243 struct drm_property *prop;
244 int ret;
245
246 ret = drm_connector_create_standard_properties(dev);
247 if (ret)
248 return ret;
249
250 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
251 "type", drm_plane_type_enum_list,
252 ARRAY_SIZE(drm_plane_type_enum_list));
253 if (!prop)
254 return -ENOMEM;
255 dev->mode_config.plane_type_property = prop;
256
257 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
258 "SRC_X", 0, UINT_MAX);
259 if (!prop)
260 return -ENOMEM;
261 dev->mode_config.prop_src_x = prop;
262
263 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
264 "SRC_Y", 0, UINT_MAX);
265 if (!prop)
266 return -ENOMEM;
267 dev->mode_config.prop_src_y = prop;
268
269 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
270 "SRC_W", 0, UINT_MAX);
271 if (!prop)
272 return -ENOMEM;
273 dev->mode_config.prop_src_w = prop;
274
275 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
276 "SRC_H", 0, UINT_MAX);
277 if (!prop)
278 return -ENOMEM;
279 dev->mode_config.prop_src_h = prop;
280
281 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
282 "CRTC_X", INT_MIN, INT_MAX);
283 if (!prop)
284 return -ENOMEM;
285 dev->mode_config.prop_crtc_x = prop;
286
287 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
288 "CRTC_Y", INT_MIN, INT_MAX);
289 if (!prop)
290 return -ENOMEM;
291 dev->mode_config.prop_crtc_y = prop;
292
293 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
294 "CRTC_W", 0, INT_MAX);
295 if (!prop)
296 return -ENOMEM;
297 dev->mode_config.prop_crtc_w = prop;
298
299 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
300 "CRTC_H", 0, INT_MAX);
301 if (!prop)
302 return -ENOMEM;
303 dev->mode_config.prop_crtc_h = prop;
304
305 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
306 "FB_ID", DRM_MODE_OBJECT_FB);
307 if (!prop)
308 return -ENOMEM;
309 dev->mode_config.prop_fb_id = prop;
310
311 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
312 "IN_FENCE_FD", -1, INT_MAX);
313 if (!prop)
314 return -ENOMEM;
315 dev->mode_config.prop_in_fence_fd = prop;
316
317 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
318 "OUT_FENCE_PTR", 0, U64_MAX);
319 if (!prop)
320 return -ENOMEM;
321 dev->mode_config.prop_out_fence_ptr = prop;
322
323 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
324 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
325 if (!prop)
326 return -ENOMEM;
327 dev->mode_config.prop_crtc_id = prop;
328
329 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
330 "ACTIVE");
331 if (!prop)
332 return -ENOMEM;
333 dev->mode_config.prop_active = prop;
334
335 prop = drm_property_create(dev,
336 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
337 "MODE_ID", 0);
338 if (!prop)
339 return -ENOMEM;
340 dev->mode_config.prop_mode_id = prop;
341
342 prop = drm_property_create(dev,
343 DRM_MODE_PROP_BLOB,
344 "DEGAMMA_LUT", 0);
345 if (!prop)
346 return -ENOMEM;
347 dev->mode_config.degamma_lut_property = prop;
348
349 prop = drm_property_create_range(dev,
350 DRM_MODE_PROP_IMMUTABLE,
351 "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
352 if (!prop)
353 return -ENOMEM;
354 dev->mode_config.degamma_lut_size_property = prop;
355
356 prop = drm_property_create(dev,
357 DRM_MODE_PROP_BLOB,
358 "CTM", 0);
359 if (!prop)
360 return -ENOMEM;
361 dev->mode_config.ctm_property = prop;
362
363 prop = drm_property_create(dev,
364 DRM_MODE_PROP_BLOB,
365 "GAMMA_LUT", 0);
366 if (!prop)
367 return -ENOMEM;
368 dev->mode_config.gamma_lut_property = prop;
369
370 prop = drm_property_create_range(dev,
371 DRM_MODE_PROP_IMMUTABLE,
372 "GAMMA_LUT_SIZE", 0, UINT_MAX);
373 if (!prop)
374 return -ENOMEM;
375 dev->mode_config.gamma_lut_size_property = prop;
376
377 return 0;
378}
379
380/**
381 * drm_mode_config_init - initialize DRM mode_configuration structure
382 * @dev: DRM device
383 *
384 * Initialize @dev's mode_config structure, used for tracking the graphics
385 * configuration of @dev.
386 *
387 * Since this initializes the modeset locks, no locking is possible. Which is no
388 * problem, since this should happen single threaded at init time. It is the
389 * driver's problem to ensure this guarantee.
390 *
391 */
392void drm_mode_config_init(struct drm_device *dev)
393{
394 mutex_init(&dev->mode_config.mutex);
395 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
396 mutex_init(&dev->mode_config.idr_mutex);
397 mutex_init(&dev->mode_config.fb_lock);
398 mutex_init(&dev->mode_config.blob_lock);
399 INIT_LIST_HEAD(&dev->mode_config.fb_list);
400 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
401 INIT_LIST_HEAD(&dev->mode_config.connector_list);
402 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
403 INIT_LIST_HEAD(&dev->mode_config.property_list);
404 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
405 INIT_LIST_HEAD(&dev->mode_config.plane_list);
406 idr_init(&dev->mode_config.crtc_idr);
407 idr_init(&dev->mode_config.tile_idr);
408 ida_init(&dev->mode_config.connector_ida);
409
410 drm_modeset_lock_all(dev);
411 drm_mode_create_standard_properties(dev);
412 drm_modeset_unlock_all(dev);
413
414 /* Just to be sure */
415 dev->mode_config.num_fb = 0;
416 dev->mode_config.num_connector = 0;
417 dev->mode_config.num_crtc = 0;
418 dev->mode_config.num_encoder = 0;
419 dev->mode_config.num_overlay_plane = 0;
420 dev->mode_config.num_total_plane = 0;
421}
422EXPORT_SYMBOL(drm_mode_config_init);
423
424/**
425 * drm_mode_config_cleanup - free up DRM mode_config info
426 * @dev: DRM device
427 *
428 * Free up all the connectors and CRTCs associated with this DRM device, then
429 * free up the framebuffers and associated buffer objects.
430 *
431 * Note that since this /should/ happen single-threaded at driver/device
432 * teardown time, no locking is required. It's the driver's job to ensure that
433 * this guarantee actually holds true.
434 *
435 * FIXME: cleanup any dangling user buffer objects too
436 */
437void drm_mode_config_cleanup(struct drm_device *dev)
438{
439 struct drm_connector *connector, *ot;
440 struct drm_crtc *crtc, *ct;
441 struct drm_encoder *encoder, *enct;
442 struct drm_framebuffer *fb, *fbt;
443 struct drm_property *property, *pt;
444 struct drm_property_blob *blob, *bt;
445 struct drm_plane *plane, *plt;
446
447 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
448 head) {
449 encoder->funcs->destroy(encoder);
450 }
451
452 list_for_each_entry_safe(connector, ot,
453 &dev->mode_config.connector_list, head) {
454 connector->funcs->destroy(connector);
455 }
456
457 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
458 head) {
459 drm_property_destroy(dev, property);
460 }
461
462 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
463 head) {
464 plane->funcs->destroy(plane);
465 }
466
467 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
468 crtc->funcs->destroy(crtc);
469 }
470
471 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
472 head_global) {
473 drm_property_unreference_blob(blob);
474 }
475
476 /*
477 * Single-threaded teardown context, so it's not required to grab the
478 * fb_lock to protect against concurrent fb_list access. Contrary, it
479 * would actually deadlock with the drm_framebuffer_cleanup function.
480 *
481 * Also, if there are any framebuffers left, that's a driver leak now,
482 * so politely WARN about this.
483 */
484 WARN_ON(!list_empty(&dev->mode_config.fb_list));
485 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
486 drm_framebuffer_free(&fb->base.refcount);
487 }
488
489 ida_destroy(&dev->mode_config.connector_ida);
490 idr_destroy(&dev->mode_config.tile_idr);
491 idr_destroy(&dev->mode_config.crtc_idr);
492 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
493}
494EXPORT_SYMBOL(drm_mode_config_cleanup);