Merge tag 'drm-misc-fixes-2017-12-14' of git://anongit.freedesktop.org/drm/drm-misc
[sfrench/cifs-2.6.git] / drivers / gpu / drm / drm_mode_config.c
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_encoder.h>
24 #include <drm/drm_mode_config.h>
25 #include <drm/drmP.h>
26
27 #include "drm_crtc_internal.h"
28 #include "drm_internal.h"
29
30 int drm_modeset_register_all(struct drm_device *dev)
31 {
32         int ret;
33
34         ret = drm_plane_register_all(dev);
35         if (ret)
36                 goto err_plane;
37
38         ret = drm_crtc_register_all(dev);
39         if  (ret)
40                 goto err_crtc;
41
42         ret = drm_encoder_register_all(dev);
43         if (ret)
44                 goto err_encoder;
45
46         ret = drm_connector_register_all(dev);
47         if (ret)
48                 goto err_connector;
49
50         return 0;
51
52 err_connector:
53         drm_encoder_unregister_all(dev);
54 err_encoder:
55         drm_crtc_unregister_all(dev);
56 err_crtc:
57         drm_plane_unregister_all(dev);
58 err_plane:
59         return ret;
60 }
61
62 void drm_modeset_unregister_all(struct drm_device *dev)
63 {
64         drm_connector_unregister_all(dev);
65         drm_encoder_unregister_all(dev);
66         drm_crtc_unregister_all(dev);
67         drm_plane_unregister_all(dev);
68 }
69
70 /**
71  * drm_mode_getresources - get graphics configuration
72  * @dev: drm device for the ioctl
73  * @data: data pointer for the ioctl
74  * @file_priv: drm file for the ioctl call
75  *
76  * Construct a set of configuration description structures and return
77  * them to the user, including CRTC, connector and framebuffer configuration.
78  *
79  * Called by the user via ioctl.
80  *
81  * Returns:
82  * Zero on success, negative errno on failure.
83  */
84 int drm_mode_getresources(struct drm_device *dev, void *data,
85                           struct drm_file *file_priv)
86 {
87         struct drm_mode_card_res *card_res = data;
88         struct drm_framebuffer *fb;
89         struct drm_connector *connector;
90         struct drm_crtc *crtc;
91         struct drm_encoder *encoder;
92         int count, ret = 0;
93         uint32_t __user *fb_id;
94         uint32_t __user *crtc_id;
95         uint32_t __user *connector_id;
96         uint32_t __user *encoder_id;
97         struct drm_connector_list_iter conn_iter;
98
99         if (!drm_core_check_feature(dev, DRIVER_MODESET))
100                 return -EINVAL;
101
102
103         mutex_lock(&file_priv->fbs_lock);
104         count = 0;
105         fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
106         list_for_each_entry(fb, &file_priv->fbs, filp_head) {
107                 if (count < card_res->count_fbs &&
108                     put_user(fb->base.id, fb_id + count)) {
109                         mutex_unlock(&file_priv->fbs_lock);
110                         return -EFAULT;
111                 }
112                 count++;
113         }
114         card_res->count_fbs = count;
115         mutex_unlock(&file_priv->fbs_lock);
116
117         card_res->max_height = dev->mode_config.max_height;
118         card_res->min_height = dev->mode_config.min_height;
119         card_res->max_width = dev->mode_config.max_width;
120         card_res->min_width = dev->mode_config.min_width;
121
122         count = 0;
123         crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
124         drm_for_each_crtc(crtc, dev) {
125                 if (drm_lease_held(file_priv, crtc->base.id)) {
126                         if (count < card_res->count_crtcs &&
127                             put_user(crtc->base.id, crtc_id + count))
128                                 return -EFAULT;
129                         count++;
130                 }
131         }
132         card_res->count_crtcs = count;
133
134         count = 0;
135         encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
136         drm_for_each_encoder(encoder, dev) {
137                 if (count < card_res->count_encoders &&
138                     put_user(encoder->base.id, encoder_id + count))
139                         return -EFAULT;
140                 count++;
141         }
142         card_res->count_encoders = count;
143
144         drm_connector_list_iter_begin(dev, &conn_iter);
145         count = 0;
146         connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
147         drm_for_each_connector_iter(connector, &conn_iter) {
148                 if (drm_lease_held(file_priv, connector->base.id)) {
149                         if (count < card_res->count_connectors &&
150                             put_user(connector->base.id, connector_id + count)) {
151                                 drm_connector_list_iter_end(&conn_iter);
152                                 return -EFAULT;
153                         }
154                         count++;
155                 }
156         }
157         card_res->count_connectors = count;
158         drm_connector_list_iter_end(&conn_iter);
159
160         return ret;
161 }
162
163 /**
164  * drm_mode_config_reset - call ->reset callbacks
165  * @dev: drm device
166  *
167  * This functions calls all the crtc's, encoder's and connector's ->reset
168  * callback. Drivers can use this in e.g. their driver load or resume code to
169  * reset hardware and software state.
170  */
171 void drm_mode_config_reset(struct drm_device *dev)
172 {
173         struct drm_crtc *crtc;
174         struct drm_plane *plane;
175         struct drm_encoder *encoder;
176         struct drm_connector *connector;
177         struct drm_connector_list_iter conn_iter;
178
179         drm_for_each_plane(plane, dev)
180                 if (plane->funcs->reset)
181                         plane->funcs->reset(plane);
182
183         drm_for_each_crtc(crtc, dev)
184                 if (crtc->funcs->reset)
185                         crtc->funcs->reset(crtc);
186
187         drm_for_each_encoder(encoder, dev)
188                 if (encoder->funcs->reset)
189                         encoder->funcs->reset(encoder);
190
191         drm_connector_list_iter_begin(dev, &conn_iter);
192         drm_for_each_connector_iter(connector, &conn_iter)
193                 if (connector->funcs->reset)
194                         connector->funcs->reset(connector);
195         drm_connector_list_iter_end(&conn_iter);
196 }
197 EXPORT_SYMBOL(drm_mode_config_reset);
198
199 /*
200  * Global properties
201  */
202 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
203         { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
204         { DRM_PLANE_TYPE_PRIMARY, "Primary" },
205         { DRM_PLANE_TYPE_CURSOR, "Cursor" },
206 };
207
208 static int drm_mode_create_standard_properties(struct drm_device *dev)
209 {
210         struct drm_property *prop;
211         int ret;
212
213         ret = drm_connector_create_standard_properties(dev);
214         if (ret)
215                 return ret;
216
217         prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
218                                         "type", drm_plane_type_enum_list,
219                                         ARRAY_SIZE(drm_plane_type_enum_list));
220         if (!prop)
221                 return -ENOMEM;
222         dev->mode_config.plane_type_property = prop;
223
224         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
225                         "SRC_X", 0, UINT_MAX);
226         if (!prop)
227                 return -ENOMEM;
228         dev->mode_config.prop_src_x = prop;
229
230         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
231                         "SRC_Y", 0, UINT_MAX);
232         if (!prop)
233                 return -ENOMEM;
234         dev->mode_config.prop_src_y = prop;
235
236         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
237                         "SRC_W", 0, UINT_MAX);
238         if (!prop)
239                 return -ENOMEM;
240         dev->mode_config.prop_src_w = prop;
241
242         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
243                         "SRC_H", 0, UINT_MAX);
244         if (!prop)
245                 return -ENOMEM;
246         dev->mode_config.prop_src_h = prop;
247
248         prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
249                         "CRTC_X", INT_MIN, INT_MAX);
250         if (!prop)
251                 return -ENOMEM;
252         dev->mode_config.prop_crtc_x = prop;
253
254         prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
255                         "CRTC_Y", INT_MIN, INT_MAX);
256         if (!prop)
257                 return -ENOMEM;
258         dev->mode_config.prop_crtc_y = prop;
259
260         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
261                         "CRTC_W", 0, INT_MAX);
262         if (!prop)
263                 return -ENOMEM;
264         dev->mode_config.prop_crtc_w = prop;
265
266         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
267                         "CRTC_H", 0, INT_MAX);
268         if (!prop)
269                 return -ENOMEM;
270         dev->mode_config.prop_crtc_h = prop;
271
272         prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
273                         "FB_ID", DRM_MODE_OBJECT_FB);
274         if (!prop)
275                 return -ENOMEM;
276         dev->mode_config.prop_fb_id = prop;
277
278         prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
279                         "IN_FENCE_FD", -1, INT_MAX);
280         if (!prop)
281                 return -ENOMEM;
282         dev->mode_config.prop_in_fence_fd = prop;
283
284         prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
285                         "OUT_FENCE_PTR", 0, U64_MAX);
286         if (!prop)
287                 return -ENOMEM;
288         dev->mode_config.prop_out_fence_ptr = prop;
289
290         prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
291                         "CRTC_ID", DRM_MODE_OBJECT_CRTC);
292         if (!prop)
293                 return -ENOMEM;
294         dev->mode_config.prop_crtc_id = prop;
295
296         prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
297                         "ACTIVE");
298         if (!prop)
299                 return -ENOMEM;
300         dev->mode_config.prop_active = prop;
301
302         prop = drm_property_create(dev,
303                         DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
304                         "MODE_ID", 0);
305         if (!prop)
306                 return -ENOMEM;
307         dev->mode_config.prop_mode_id = prop;
308
309         prop = drm_property_create(dev,
310                         DRM_MODE_PROP_BLOB,
311                         "DEGAMMA_LUT", 0);
312         if (!prop)
313                 return -ENOMEM;
314         dev->mode_config.degamma_lut_property = prop;
315
316         prop = drm_property_create_range(dev,
317                         DRM_MODE_PROP_IMMUTABLE,
318                         "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
319         if (!prop)
320                 return -ENOMEM;
321         dev->mode_config.degamma_lut_size_property = prop;
322
323         prop = drm_property_create(dev,
324                         DRM_MODE_PROP_BLOB,
325                         "CTM", 0);
326         if (!prop)
327                 return -ENOMEM;
328         dev->mode_config.ctm_property = prop;
329
330         prop = drm_property_create(dev,
331                         DRM_MODE_PROP_BLOB,
332                         "GAMMA_LUT", 0);
333         if (!prop)
334                 return -ENOMEM;
335         dev->mode_config.gamma_lut_property = prop;
336
337         prop = drm_property_create_range(dev,
338                         DRM_MODE_PROP_IMMUTABLE,
339                         "GAMMA_LUT_SIZE", 0, UINT_MAX);
340         if (!prop)
341                 return -ENOMEM;
342         dev->mode_config.gamma_lut_size_property = prop;
343
344         prop = drm_property_create(dev,
345                                    DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
346                                    "IN_FORMATS", 0);
347         if (!prop)
348                 return -ENOMEM;
349         dev->mode_config.modifiers_property = prop;
350
351         return 0;
352 }
353
354 /**
355  * drm_mode_config_init - initialize DRM mode_configuration structure
356  * @dev: DRM device
357  *
358  * Initialize @dev's mode_config structure, used for tracking the graphics
359  * configuration of @dev.
360  *
361  * Since this initializes the modeset locks, no locking is possible. Which is no
362  * problem, since this should happen single threaded at init time. It is the
363  * driver's problem to ensure this guarantee.
364  *
365  */
366 void drm_mode_config_init(struct drm_device *dev)
367 {
368         mutex_init(&dev->mode_config.mutex);
369         drm_modeset_lock_init(&dev->mode_config.connection_mutex);
370         mutex_init(&dev->mode_config.idr_mutex);
371         mutex_init(&dev->mode_config.fb_lock);
372         mutex_init(&dev->mode_config.blob_lock);
373         INIT_LIST_HEAD(&dev->mode_config.fb_list);
374         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
375         INIT_LIST_HEAD(&dev->mode_config.connector_list);
376         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
377         INIT_LIST_HEAD(&dev->mode_config.property_list);
378         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
379         INIT_LIST_HEAD(&dev->mode_config.plane_list);
380         idr_init(&dev->mode_config.crtc_idr);
381         idr_init(&dev->mode_config.tile_idr);
382         ida_init(&dev->mode_config.connector_ida);
383         spin_lock_init(&dev->mode_config.connector_list_lock);
384
385         init_llist_head(&dev->mode_config.connector_free_list);
386         INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
387
388         drm_mode_create_standard_properties(dev);
389
390         /* Just to be sure */
391         dev->mode_config.num_fb = 0;
392         dev->mode_config.num_connector = 0;
393         dev->mode_config.num_crtc = 0;
394         dev->mode_config.num_encoder = 0;
395         dev->mode_config.num_total_plane = 0;
396 }
397 EXPORT_SYMBOL(drm_mode_config_init);
398
399 /**
400  * drm_mode_config_cleanup - free up DRM mode_config info
401  * @dev: DRM device
402  *
403  * Free up all the connectors and CRTCs associated with this DRM device, then
404  * free up the framebuffers and associated buffer objects.
405  *
406  * Note that since this /should/ happen single-threaded at driver/device
407  * teardown time, no locking is required. It's the driver's job to ensure that
408  * this guarantee actually holds true.
409  *
410  * FIXME: cleanup any dangling user buffer objects too
411  */
412 void drm_mode_config_cleanup(struct drm_device *dev)
413 {
414         struct drm_connector *connector;
415         struct drm_connector_list_iter conn_iter;
416         struct drm_crtc *crtc, *ct;
417         struct drm_encoder *encoder, *enct;
418         struct drm_framebuffer *fb, *fbt;
419         struct drm_property *property, *pt;
420         struct drm_property_blob *blob, *bt;
421         struct drm_plane *plane, *plt;
422
423         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
424                                  head) {
425                 encoder->funcs->destroy(encoder);
426         }
427
428         drm_connector_list_iter_begin(dev, &conn_iter);
429         drm_for_each_connector_iter(connector, &conn_iter) {
430                 /* drm_connector_list_iter holds an full reference to the
431                  * current connector itself, which means it is inherently safe
432                  * against unreferencing the current connector - but not against
433                  * deleting it right away. */
434                 drm_connector_put(connector);
435         }
436         drm_connector_list_iter_end(&conn_iter);
437         /* connector_iter drops references in a work item. */
438         flush_work(&dev->mode_config.connector_free_work);
439         if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
440                 drm_connector_list_iter_begin(dev, &conn_iter);
441                 drm_for_each_connector_iter(connector, &conn_iter)
442                         DRM_ERROR("connector %s leaked!\n", connector->name);
443                 drm_connector_list_iter_end(&conn_iter);
444         }
445
446         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
447                                  head) {
448                 drm_property_destroy(dev, property);
449         }
450
451         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
452                                  head) {
453                 plane->funcs->destroy(plane);
454         }
455
456         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
457                 crtc->funcs->destroy(crtc);
458         }
459
460         list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
461                                  head_global) {
462                 drm_property_blob_put(blob);
463         }
464
465         /*
466          * Single-threaded teardown context, so it's not required to grab the
467          * fb_lock to protect against concurrent fb_list access. Contrary, it
468          * would actually deadlock with the drm_framebuffer_cleanup function.
469          *
470          * Also, if there are any framebuffers left, that's a driver leak now,
471          * so politely WARN about this.
472          */
473         WARN_ON(!list_empty(&dev->mode_config.fb_list));
474         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
475                 drm_framebuffer_free(&fb->base.refcount);
476         }
477
478         ida_destroy(&dev->mode_config.connector_ida);
479         idr_destroy(&dev->mode_config.tile_idr);
480         idr_destroy(&dev->mode_config.crtc_idr);
481         drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
482 }
483 EXPORT_SYMBOL(drm_mode_config_cleanup);