drivers/gpu/drm/tegra/drm.c

   1 /*
   2  * Copyright (C) 2012 Avionic Design GmbH
   3  * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/host1x.h>
  11
  12 #include "drm.h"
  13 #include "gem.h"
  14
  15 #define DRIVER_NAME "tegra"
  16 #define DRIVER_DESC "NVIDIA Tegra graphics"
  17 #define DRIVER_DATE "20120330"
  18 #define DRIVER_MAJOR 0
  19 #define DRIVER_MINOR 0
  20 #define DRIVER_PATCHLEVEL 0
  21
  22 struct tegra_drm_file {
  23         struct list_head contexts;
  24 };
  25
  26 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
  27 {
  28         struct host1x_device *device = to_host1x_device(drm->dev);
  29         struct tegra_drm *tegra;
  30         int err;
  31
  32         tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
  33         if (!tegra)
  34                 return -ENOMEM;
  35
  36         dev_set_drvdata(drm->dev, tegra);
  37         mutex_init(&tegra->clients_lock);
  38         INIT_LIST_HEAD(&tegra->clients);
  39         drm->dev_private = tegra;
  40         tegra->drm = drm;
  41
  42         drm_mode_config_init(drm);
  43
  44         err = host1x_device_init(device);
  45         if (err < 0)
  46                 return err;
  47
  48         /*
  49          * We don't use the drm_irq_install() helpers provided by the DRM
  50          * core, so we need to set this manually in order to allow the
  51          * DRM_IOCTL_WAIT_VBLANK to operate correctly.
  52          */
  53         drm->irq_enabled = true;
  54
  55         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
  56         if (err < 0)
  57                 return err;
  58
  59         err = tegra_drm_fb_init(drm);
  60         if (err < 0)
  61                 return err;
  62
  63         drm_kms_helper_poll_init(drm);
  64
  65         return 0;
  66 }
  67
  68 static int tegra_drm_unload(struct drm_device *drm)
  69 {
  70         struct host1x_device *device = to_host1x_device(drm->dev);
  71         int err;
  72
  73         drm_kms_helper_poll_fini(drm);
  74         tegra_drm_fb_exit(drm);
  75         drm_vblank_cleanup(drm);
  76         drm_mode_config_cleanup(drm);
  77
  78         err = host1x_device_exit(device);
  79         if (err < 0)
  80                 return err;
  81
  82         return 0;
  83 }
  84
  85 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
  86 {
  87         struct tegra_drm_file *fpriv;
  88
  89         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
  90         if (!fpriv)
  91                 return -ENOMEM;
  92
  93         INIT_LIST_HEAD(&fpriv->contexts);
  94         filp->driver_priv = fpriv;
  95
  96         return 0;
  97 }
  98
  99 static void tegra_drm_context_free(struct tegra_drm_context *context)
 100 {
 101         context->client->ops->close_channel(context);
 102         kfree(context);
 103 }
 104
 105 static void tegra_drm_lastclose(struct drm_device *drm)
 106 {
 107         struct tegra_drm *tegra = drm->dev_private;
 108
 109         tegra_fbdev_restore_mode(tegra->fbdev);
 110 }
 111
 112 #ifdef CONFIG_DRM_TEGRA_STAGING
 113 static struct tegra_drm_context *tegra_drm_get_context(__u64 context)
 114 {
 115         return (struct tegra_drm_context *)(uintptr_t)context;
 116 }
 117
 118 static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
 119                                         struct tegra_drm_context *context)
 120 {
 121         struct tegra_drm_context *ctx;
 122
 123         list_for_each_entry(ctx, &file->contexts, list)
 124                 if (ctx == context)
 125                         return true;
 126
 127         return false;
 128 }
 129
 130 static int tegra_gem_create(struct drm_device *drm, void *data,
 131                             struct drm_file *file)
 132 {
 133         struct drm_tegra_gem_create *args = data;
 134         struct tegra_bo *bo;
 135
 136         bo = tegra_bo_create_with_handle(file, drm, args->size,
 137                                          &args->handle);
 138         if (IS_ERR(bo))
 139                 return PTR_ERR(bo);
 140
 141         return 0;
 142 }
 143
 144 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 145                           struct drm_file *file)
 146 {
 147         struct drm_tegra_gem_mmap *args = data;
 148         struct drm_gem_object *gem;
 149         struct tegra_bo *bo;
 150
 151         gem = drm_gem_object_lookup(drm, file, args->handle);
 152         if (!gem)
 153                 return -EINVAL;
 154
 155         bo = to_tegra_bo(gem);
 156
 157         args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 158
 159         drm_gem_object_unreference(gem);
 160
 161         return 0;
 162 }
 163
 164 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 165                              struct drm_file *file)
 166 {
 167         struct host1x *host = dev_get_drvdata(drm->dev->parent);
 168         struct drm_tegra_syncpt_read *args = data;
 169         struct host1x_syncpt *sp;
 170
 171         sp = host1x_syncpt_get(host, args->id);
 172         if (!sp)
 173                 return -EINVAL;
 174
 175         args->value = host1x_syncpt_read_min(sp);
 176         return 0;
 177 }
 178
 179 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 180                              struct drm_file *file)
 181 {
 182         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 183         struct drm_tegra_syncpt_incr *args = data;
 184         struct host1x_syncpt *sp;
 185
 186         sp = host1x_syncpt_get(host1x, args->id);
 187         if (!sp)
 188                 return -EINVAL;
 189
 190         return host1x_syncpt_incr(sp);
 191 }
 192
 193 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 194                              struct drm_file *file)
 195 {
 196         struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
 197         struct drm_tegra_syncpt_wait *args = data;
 198         struct host1x_syncpt *sp;
 199
 200         sp = host1x_syncpt_get(host1x, args->id);
 201         if (!sp)
 202                 return -EINVAL;
 203
 204         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 205                                   &args->value);
 206 }
 207
 208 static int tegra_open_channel(struct drm_device *drm, void *data,
 209                               struct drm_file *file)
 210 {
 211         struct tegra_drm_file *fpriv = file->driver_priv;
 212         struct tegra_drm *tegra = drm->dev_private;
 213         struct drm_tegra_open_channel *args = data;
 214         struct tegra_drm_context *context;
 215         struct tegra_drm_client *client;
 216         int err = -ENODEV;
 217
 218         context = kzalloc(sizeof(*context), GFP_KERNEL);
 219         if (!context)
 220                 return -ENOMEM;
 221
 222         list_for_each_entry(client, &tegra->clients, list)
 223                 if (client->base.class == args->client) {
 224                         err = client->ops->open_channel(client, context);
 225                         if (err)
 226                                 break;
 227
 228                         list_add(&context->list, &fpriv->contexts);
 229                         args->context = (uintptr_t)context;
 230                         context->client = client;
 231                         return 0;
 232                 }
 233
 234         kfree(context);
 235         return err;
 236 }
 237
 238 static int tegra_close_channel(struct drm_device *drm, void *data,
 239                                struct drm_file *file)
 240 {
 241         struct tegra_drm_file *fpriv = file->driver_priv;
 242         struct drm_tegra_close_channel *args = data;
 243         struct tegra_drm_context *context;
 244
 245         context = tegra_drm_get_context(args->context);
 246
 247         if (!tegra_drm_file_owns_context(fpriv, context))
 248                 return -EINVAL;
 249
 250         list_del(&context->list);
 251         tegra_drm_context_free(context);
 252
 253         return 0;
 254 }
 255
 256 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 257                             struct drm_file *file)
 258 {
 259         struct tegra_drm_file *fpriv = file->driver_priv;
 260         struct drm_tegra_get_syncpt *args = data;
 261         struct tegra_drm_context *context;
 262         struct host1x_syncpt *syncpt;
 263
 264         context = tegra_drm_get_context(args->context);
 265
 266         if (!tegra_drm_file_owns_context(fpriv, context))
 267                 return -ENODEV;
 268
 269         if (args->index >= context->client->base.num_syncpts)
 270                 return -EINVAL;
 271
 272         syncpt = context->client->base.syncpts[args->index];
 273         args->id = host1x_syncpt_id(syncpt);
 274
 275         return 0;
 276 }
 277
 278 static int tegra_submit(struct drm_device *drm, void *data,
 279                         struct drm_file *file)
 280 {
 281         struct tegra_drm_file *fpriv = file->driver_priv;
 282         struct drm_tegra_submit *args = data;
 283         struct tegra_drm_context *context;
 284
 285         context = tegra_drm_get_context(args->context);
 286
 287         if (!tegra_drm_file_owns_context(fpriv, context))
 288                 return -ENODEV;
 289
 290         return context->client->ops->submit(context, args, drm, file);
 291 }
 292 #endif
 293
 294 static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
 295 #ifdef CONFIG_DRM_TEGRA_STAGING
 296         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
 297         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
 298         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
 299         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
 300         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
 301         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
 302         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
 303         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 304         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 305 #endif
 306 };
 307
 308 static const struct file_operations tegra_drm_fops = {
 309         .owner = THIS_MODULE,
 310         .open = drm_open,
 311         .release = drm_release,
 312         .unlocked_ioctl = drm_ioctl,
 313         .mmap = tegra_drm_mmap,
 314         .poll = drm_poll,
 315         .read = drm_read,
 316 #ifdef CONFIG_COMPAT
 317         .compat_ioctl = drm_compat_ioctl,
 318 #endif
 319         .llseek = noop_llseek,
 320 };
 321
 322 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
 323 {
 324         struct drm_crtc *crtc;
 325
 326         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 327                 struct tegra_dc *dc = to_tegra_dc(crtc);
 328
 329                 if (dc->pipe == pipe)
 330                         return crtc;
 331         }
 332
 333         return NULL;
 334 }
 335
 336 static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
 337 {
 338         /* TODO: implement real hardware counter using syncpoints */
 339         return drm_vblank_count(dev, crtc);
 340 }
 341
 342 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
 343 {
 344         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 345         struct tegra_dc *dc = to_tegra_dc(crtc);
 346
 347         if (!crtc)
 348                 return -ENODEV;
 349
 350         tegra_dc_enable_vblank(dc);
 351
 352         return 0;
 353 }
 354
 355 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
 356 {
 357         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 358         struct tegra_dc *dc = to_tegra_dc(crtc);
 359
 360         if (crtc)
 361                 tegra_dc_disable_vblank(dc);
 362 }
 363
 364 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 365 {
 366         struct tegra_drm_file *fpriv = file->driver_priv;
 367         struct tegra_drm_context *context, *tmp;
 368         struct drm_crtc *crtc;
 369
 370         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 371                 tegra_dc_cancel_page_flip(crtc, file);
 372
 373         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 374                 tegra_drm_context_free(context);
 375
 376         kfree(fpriv);
 377 }
 378
 379 #ifdef CONFIG_DEBUG_FS
 380 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 381 {
 382         struct drm_info_node *node = (struct drm_info_node *)s->private;
 383         struct drm_device *drm = node->minor->dev;
 384         struct drm_framebuffer *fb;
 385
 386         mutex_lock(&drm->mode_config.fb_lock);
 387
 388         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 389                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 390                            fb->base.id, fb->width, fb->height, fb->depth,
 391                            fb->bits_per_pixel,
 392                            atomic_read(&fb->refcount.refcount));
 393         }
 394
 395         mutex_unlock(&drm->mode_config.fb_lock);
 396
 397         return 0;
 398 }
 399
 400 static struct drm_info_list tegra_debugfs_list[] = {
 401         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 402 };
 403
 404 static int tegra_debugfs_init(struct drm_minor *minor)
 405 {
 406         return drm_debugfs_create_files(tegra_debugfs_list,
 407                                         ARRAY_SIZE(tegra_debugfs_list),
 408                                         minor->debugfs_root, minor);
 409 }
 410
 411 static void tegra_debugfs_cleanup(struct drm_minor *minor)
 412 {
 413         drm_debugfs_remove_files(tegra_debugfs_list,
 414                                  ARRAY_SIZE(tegra_debugfs_list), minor);
 415 }
 416 #endif
 417
 418 struct drm_driver tegra_drm_driver = {
 419         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 420         .load = tegra_drm_load,
 421         .unload = tegra_drm_unload,
 422         .open = tegra_drm_open,
 423         .preclose = tegra_drm_preclose,
 424         .lastclose = tegra_drm_lastclose,
 425
 426         .get_vblank_counter = tegra_drm_get_vblank_counter,
 427         .enable_vblank = tegra_drm_enable_vblank,
 428         .disable_vblank = tegra_drm_disable_vblank,
 429
 430 #if defined(CONFIG_DEBUG_FS)
 431         .debugfs_init = tegra_debugfs_init,
 432         .debugfs_cleanup = tegra_debugfs_cleanup,
 433 #endif
 434
 435         .gem_free_object = tegra_bo_free_object,
 436         .gem_vm_ops = &tegra_bo_vm_ops,
 437         .dumb_create = tegra_bo_dumb_create,
 438         .dumb_map_offset = tegra_bo_dumb_map_offset,
 439         .dumb_destroy = drm_gem_dumb_destroy,
 440
 441         .ioctls = tegra_drm_ioctls,
 442         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 443         .fops = &tegra_drm_fops,
 444
 445         .name = DRIVER_NAME,
 446         .desc = DRIVER_DESC,
 447         .date = DRIVER_DATE,
 448         .major = DRIVER_MAJOR,
 449         .minor = DRIVER_MINOR,
 450         .patchlevel = DRIVER_PATCHLEVEL,
 451 };
 452
 453 int tegra_drm_register_client(struct tegra_drm *tegra,
 454                               struct tegra_drm_client *client)
 455 {
 456         mutex_lock(&tegra->clients_lock);
 457         list_add_tail(&client->list, &tegra->clients);
 458         mutex_unlock(&tegra->clients_lock);
 459
 460         return 0;
 461 }
 462
 463 int tegra_drm_unregister_client(struct tegra_drm *tegra,
 464                                 struct tegra_drm_client *client)
 465 {
 466         mutex_lock(&tegra->clients_lock);
 467         list_del_init(&client->list);
 468         mutex_unlock(&tegra->clients_lock);
 469
 470         return 0;
 471 }
 472
 473 static int host1x_drm_probe(struct host1x_device *device)
 474 {
 475         return drm_host1x_init(&tegra_drm_driver, device);
 476 }
 477
 478 static int host1x_drm_remove(struct host1x_device *device)
 479 {
 480         drm_host1x_exit(&tegra_drm_driver, device);
 481
 482         return 0;
 483 }
 484
 485 static const struct of_device_id host1x_drm_subdevs[] = {
 486         { .compatible = "nvidia,tegra20-dc", },
 487         { .compatible = "nvidia,tegra20-hdmi", },
 488         { .compatible = "nvidia,tegra20-gr2d", },
 489         { .compatible = "nvidia,tegra30-dc", },
 490         { .compatible = "nvidia,tegra30-hdmi", },
 491         { .compatible = "nvidia,tegra30-gr2d", },
 492         { /* sentinel */ }
 493 };
 494
 495 static struct host1x_driver host1x_drm_driver = {
 496         .name = "drm",
 497         .probe = host1x_drm_probe,
 498         .remove = host1x_drm_remove,
 499         .subdevs = host1x_drm_subdevs,
 500 };
 501
 502 static int __init host1x_drm_init(void)
 503 {
 504         int err;
 505
 506         err = host1x_driver_register(&host1x_drm_driver);
 507         if (err < 0)
 508                 return err;
 509
 510         err = platform_driver_register(&tegra_dc_driver);
 511         if (err < 0)
 512                 goto unregister_host1x;
 513
 514         err = platform_driver_register(&tegra_hdmi_driver);
 515         if (err < 0)
 516                 goto unregister_dc;
 517
 518         err = platform_driver_register(&tegra_gr2d_driver);
 519         if (err < 0)
 520                 goto unregister_hdmi;
 521
 522         return 0;
 523
 524 unregister_hdmi:
 525         platform_driver_unregister(&tegra_hdmi_driver);
 526 unregister_dc:
 527         platform_driver_unregister(&tegra_dc_driver);
 528 unregister_host1x:
 529         host1x_driver_unregister(&host1x_drm_driver);
 530         return err;
 531 }
 532 module_init(host1x_drm_init);
 533
 534 static void __exit host1x_drm_exit(void)
 535 {
 536         platform_driver_unregister(&tegra_gr2d_driver);
 537         platform_driver_unregister(&tegra_hdmi_driver);
 538         platform_driver_unregister(&tegra_dc_driver);
 539         host1x_driver_unregister(&host1x_drm_driver);
 540 }
 541 module_exit(host1x_drm_exit);
 542
 543 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
 544 MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
 545 MODULE_LICENSE("GPL v2");