drivers/gpu/host1x/drm/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/module.h>
  11 #include <linux/of_address.h>
  12 #include <linux/of_platform.h>
  13
  14 #include <linux/dma-mapping.h>
  15 #include <asm/dma-iommu.h>
  16
  17 #include <drm/drm.h>
  18 #include <drm/drmP.h>
  19
  20 #include "host1x_client.h"
  21 #include "dev.h"
  22 #include "drm.h"
  23 #include "gem.h"
  24 #include "syncpt.h"
  25
  26 #define DRIVER_NAME "tegra"
  27 #define DRIVER_DESC "NVIDIA Tegra graphics"
  28 #define DRIVER_DATE "20120330"
  29 #define DRIVER_MAJOR 0
  30 #define DRIVER_MINOR 0
  31 #define DRIVER_PATCHLEVEL 0
  32
  33 struct host1x_drm_client {
  34         struct host1x_client *client;
  35         struct device_node *np;
  36         struct list_head list;
  37 };
  38
  39 static int host1x_add_drm_client(struct host1x_drm *host1x,
  40                                  struct device_node *np)
  41 {
  42         struct host1x_drm_client *client;
  43
  44         client = kzalloc(sizeof(*client), GFP_KERNEL);
  45         if (!client)
  46                 return -ENOMEM;
  47
  48         INIT_LIST_HEAD(&client->list);
  49         client->np = of_node_get(np);
  50
  51         list_add_tail(&client->list, &host1x->drm_clients);
  52
  53         return 0;
  54 }
  55
  56 static int host1x_activate_drm_client(struct host1x_drm *host1x,
  57                                       struct host1x_drm_client *drm,
  58                                       struct host1x_client *client)
  59 {
  60         mutex_lock(&host1x->drm_clients_lock);
  61         list_del_init(&drm->list);
  62         list_add_tail(&drm->list, &host1x->drm_active);
  63         drm->client = client;
  64         mutex_unlock(&host1x->drm_clients_lock);
  65
  66         return 0;
  67 }
  68
  69 static int host1x_remove_drm_client(struct host1x_drm *host1x,
  70                                     struct host1x_drm_client *client)
  71 {
  72         mutex_lock(&host1x->drm_clients_lock);
  73         list_del_init(&client->list);
  74         mutex_unlock(&host1x->drm_clients_lock);
  75
  76         of_node_put(client->np);
  77         kfree(client);
  78
  79         return 0;
  80 }
  81
  82 static int host1x_parse_dt(struct host1x_drm *host1x)
  83 {
  84         static const char * const compat[] = {
  85                 "nvidia,tegra20-dc",
  86                 "nvidia,tegra20-hdmi",
  87                 "nvidia,tegra20-gr2d",
  88                 "nvidia,tegra30-dc",
  89                 "nvidia,tegra30-hdmi",
  90                 "nvidia,tegra30-gr2d",
  91         };
  92         unsigned int i;
  93         int err;
  94
  95         for (i = 0; i < ARRAY_SIZE(compat); i++) {
  96                 struct device_node *np;
  97
  98                 for_each_child_of_node(host1x->dev->of_node, np) {
  99                         if (of_device_is_compatible(np, compat[i]) &&
 100                             of_device_is_available(np)) {
 101                                 err = host1x_add_drm_client(host1x, np);
 102                                 if (err < 0)
 103                                         return err;
 104                         }
 105                 }
 106         }
 107
 108         return 0;
 109 }
 110
 111 int host1x_drm_alloc(struct platform_device *pdev)
 112 {
 113         struct host1x_drm *host1x;
 114         int err;
 115
 116         host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
 117         if (!host1x)
 118                 return -ENOMEM;
 119
 120         mutex_init(&host1x->drm_clients_lock);
 121         INIT_LIST_HEAD(&host1x->drm_clients);
 122         INIT_LIST_HEAD(&host1x->drm_active);
 123         mutex_init(&host1x->clients_lock);
 124         INIT_LIST_HEAD(&host1x->clients);
 125         host1x->dev = &pdev->dev;
 126
 127         err = host1x_parse_dt(host1x);
 128         if (err < 0) {
 129                 dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
 130                 return err;
 131         }
 132
 133         host1x_set_drm_data(&pdev->dev, host1x);
 134
 135         return 0;
 136 }
 137
 138 int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
 139 {
 140         struct host1x_client *client;
 141
 142         mutex_lock(&host1x->clients_lock);
 143
 144         list_for_each_entry(client, &host1x->clients, list) {
 145                 if (client->ops && client->ops->drm_init) {
 146                         int err = client->ops->drm_init(client, drm);
 147                         if (err < 0) {
 148                                 dev_err(host1x->dev,
 149                                         "DRM setup failed for %s: %d\n",
 150                                         dev_name(client->dev), err);
 151                                 return err;
 152                         }
 153                 }
 154         }
 155
 156         mutex_unlock(&host1x->clients_lock);
 157
 158         return 0;
 159 }
 160
 161 int host1x_drm_exit(struct host1x_drm *host1x)
 162 {
 163         struct platform_device *pdev = to_platform_device(host1x->dev);
 164         struct host1x_client *client;
 165
 166         if (!host1x->drm)
 167                 return 0;
 168
 169         mutex_lock(&host1x->clients_lock);
 170
 171         list_for_each_entry_reverse(client, &host1x->clients, list) {
 172                 if (client->ops && client->ops->drm_exit) {
 173                         int err = client->ops->drm_exit(client);
 174                         if (err < 0) {
 175                                 dev_err(host1x->dev,
 176                                         "DRM cleanup failed for %s: %d\n",
 177                                         dev_name(client->dev), err);
 178                                 return err;
 179                         }
 180                 }
 181         }
 182
 183         mutex_unlock(&host1x->clients_lock);
 184
 185         drm_platform_exit(&tegra_drm_driver, pdev);
 186         host1x->drm = NULL;
 187
 188         return 0;
 189 }
 190
 191 int host1x_register_client(struct host1x_drm *host1x,
 192                            struct host1x_client *client)
 193 {
 194         struct host1x_drm_client *drm, *tmp;
 195         int err;
 196
 197         mutex_lock(&host1x->clients_lock);
 198         list_add_tail(&client->list, &host1x->clients);
 199         mutex_unlock(&host1x->clients_lock);
 200
 201         list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
 202                 if (drm->np == client->dev->of_node)
 203                         host1x_activate_drm_client(host1x, drm, client);
 204
 205         if (list_empty(&host1x->drm_clients)) {
 206                 struct platform_device *pdev = to_platform_device(host1x->dev);
 207
 208                 err = drm_platform_init(&tegra_drm_driver, pdev);
 209                 if (err < 0) {
 210                         dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
 211                         return err;
 212                 }
 213         }
 214
 215         return 0;
 216 }
 217
 218 int host1x_unregister_client(struct host1x_drm *host1x,
 219                              struct host1x_client *client)
 220 {
 221         struct host1x_drm_client *drm, *tmp;
 222         int err;
 223
 224         list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
 225                 if (drm->client == client) {
 226                         err = host1x_drm_exit(host1x);
 227                         if (err < 0) {
 228                                 dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
 229                                         err);
 230                                 return err;
 231                         }
 232
 233                         host1x_remove_drm_client(host1x, drm);
 234                         break;
 235                 }
 236         }
 237
 238         mutex_lock(&host1x->clients_lock);
 239         list_del_init(&client->list);
 240         mutex_unlock(&host1x->clients_lock);
 241
 242         return 0;
 243 }
 244
 245 static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
 246 {
 247         struct host1x_drm *host1x;
 248         int err;
 249
 250         host1x = host1x_get_drm_data(drm->dev);
 251         drm->dev_private = host1x;
 252         host1x->drm = drm;
 253
 254         drm_mode_config_init(drm);
 255
 256         err = host1x_drm_init(host1x, drm);
 257         if (err < 0)
 258                 return err;
 259
 260         err = drm_vblank_init(drm, drm->mode_config.num_crtc);
 261         if (err < 0)
 262                 return err;
 263
 264         err = tegra_drm_fb_init(drm);
 265         if (err < 0)
 266                 return err;
 267
 268         drm_kms_helper_poll_init(drm);
 269
 270         return 0;
 271 }
 272
 273 static int tegra_drm_unload(struct drm_device *drm)
 274 {
 275         drm_kms_helper_poll_fini(drm);
 276         tegra_drm_fb_exit(drm);
 277
 278         drm_mode_config_cleanup(drm);
 279
 280         return 0;
 281 }
 282
 283 static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 284 {
 285         struct host1x_drm_file *fpriv;
 286
 287         fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
 288         if (!fpriv)
 289                 return -ENOMEM;
 290
 291         INIT_LIST_HEAD(&fpriv->contexts);
 292         filp->driver_priv = fpriv;
 293
 294         return 0;
 295 }
 296
 297 static void host1x_drm_context_free(struct host1x_drm_context *context)
 298 {
 299         context->client->ops->close_channel(context);
 300         kfree(context);
 301 }
 302
 303 static void tegra_drm_lastclose(struct drm_device *drm)
 304 {
 305         struct host1x_drm *host1x = drm->dev_private;
 306
 307         tegra_fbdev_restore_mode(host1x->fbdev);
 308 }
 309
 310 #ifdef CONFIG_DRM_TEGRA_STAGING
 311 static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
 312                                          struct host1x_drm_context *context)
 313 {
 314         struct host1x_drm_context *ctx;
 315
 316         list_for_each_entry(ctx, &file->contexts, list)
 317                 if (ctx == context)
 318                         return true;
 319
 320         return false;
 321 }
 322
 323 static int tegra_gem_create(struct drm_device *drm, void *data,
 324                             struct drm_file *file)
 325 {
 326         struct drm_tegra_gem_create *args = data;
 327         struct tegra_bo *bo;
 328
 329         bo = tegra_bo_create_with_handle(file, drm, args->size,
 330                                          &args->handle);
 331         if (IS_ERR(bo))
 332                 return PTR_ERR(bo);
 333
 334         return 0;
 335 }
 336
 337 static int tegra_gem_mmap(struct drm_device *drm, void *data,
 338                           struct drm_file *file)
 339 {
 340         struct drm_tegra_gem_mmap *args = data;
 341         struct drm_gem_object *gem;
 342         struct tegra_bo *bo;
 343
 344         gem = drm_gem_object_lookup(drm, file, args->handle);
 345         if (!gem)
 346                 return -EINVAL;
 347
 348         bo = to_tegra_bo(gem);
 349
 350         args->offset = tegra_bo_get_mmap_offset(bo);
 351
 352         drm_gem_object_unreference(gem);
 353
 354         return 0;
 355 }
 356
 357 static int tegra_syncpt_read(struct drm_device *drm, void *data,
 358                              struct drm_file *file)
 359 {
 360         struct drm_tegra_syncpt_read *args = data;
 361         struct host1x *host = dev_get_drvdata(drm->dev);
 362         struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
 363
 364         if (!sp)
 365                 return -EINVAL;
 366
 367         args->value = host1x_syncpt_read_min(sp);
 368         return 0;
 369 }
 370
 371 static int tegra_syncpt_incr(struct drm_device *drm, void *data,
 372                              struct drm_file *file)
 373 {
 374         struct drm_tegra_syncpt_incr *args = data;
 375         struct host1x *host = dev_get_drvdata(drm->dev);
 376         struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
 377
 378         if (!sp)
 379                 return -EINVAL;
 380
 381         host1x_syncpt_incr(sp);
 382         return 0;
 383 }
 384
 385 static int tegra_syncpt_wait(struct drm_device *drm, void *data,
 386                              struct drm_file *file)
 387 {
 388         struct drm_tegra_syncpt_wait *args = data;
 389         struct host1x *host = dev_get_drvdata(drm->dev);
 390         struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
 391
 392         if (!sp)
 393                 return -EINVAL;
 394
 395         return host1x_syncpt_wait(sp, args->thresh, args->timeout,
 396                                   &args->value);
 397 }
 398
 399 static int tegra_open_channel(struct drm_device *drm, void *data,
 400                               struct drm_file *file)
 401 {
 402         struct drm_tegra_open_channel *args = data;
 403         struct host1x_client *client;
 404         struct host1x_drm_context *context;
 405         struct host1x_drm_file *fpriv = file->driver_priv;
 406         struct host1x_drm *host1x = drm->dev_private;
 407         int err = -ENODEV;
 408
 409         context = kzalloc(sizeof(*context), GFP_KERNEL);
 410         if (!context)
 411                 return -ENOMEM;
 412
 413         list_for_each_entry(client, &host1x->clients, list)
 414                 if (client->class == args->client) {
 415                         err = client->ops->open_channel(client, context);
 416                         if (err)
 417                                 break;
 418
 419                         context->client = client;
 420                         list_add(&context->list, &fpriv->contexts);
 421                         args->context = (uintptr_t)context;
 422                         return 0;
 423                 }
 424
 425         kfree(context);
 426         return err;
 427 }
 428
 429 static int tegra_close_channel(struct drm_device *drm, void *data,
 430                                struct drm_file *file)
 431 {
 432         struct drm_tegra_close_channel *args = data;
 433         struct host1x_drm_file *fpriv = file->driver_priv;
 434         struct host1x_drm_context *context =
 435                 (struct host1x_drm_context *)(uintptr_t)args->context;
 436
 437         if (!host1x_drm_file_owns_context(fpriv, context))
 438                 return -EINVAL;
 439
 440         list_del(&context->list);
 441         host1x_drm_context_free(context);
 442
 443         return 0;
 444 }
 445
 446 static int tegra_get_syncpt(struct drm_device *drm, void *data,
 447                             struct drm_file *file)
 448 {
 449         struct drm_tegra_get_syncpt *args = data;
 450         struct host1x_drm_file *fpriv = file->driver_priv;
 451         struct host1x_drm_context *context =
 452                 (struct host1x_drm_context *)(uintptr_t)args->context;
 453         struct host1x_syncpt *syncpt;
 454
 455         if (!host1x_drm_file_owns_context(fpriv, context))
 456                 return -ENODEV;
 457
 458         if (args->index >= context->client->num_syncpts)
 459                 return -EINVAL;
 460
 461         syncpt = context->client->syncpts[args->index];
 462         args->id = host1x_syncpt_id(syncpt);
 463
 464         return 0;
 465 }
 466
 467 static int tegra_submit(struct drm_device *drm, void *data,
 468                         struct drm_file *file)
 469 {
 470         struct drm_tegra_submit *args = data;
 471         struct host1x_drm_file *fpriv = file->driver_priv;
 472         struct host1x_drm_context *context =
 473                 (struct host1x_drm_context *)(uintptr_t)args->context;
 474
 475         if (!host1x_drm_file_owns_context(fpriv, context))
 476                 return -ENODEV;
 477
 478         return context->client->ops->submit(context, args, drm, file);
 479 }
 480 #endif
 481
 482 static struct drm_ioctl_desc tegra_drm_ioctls[] = {
 483 #ifdef CONFIG_DRM_TEGRA_STAGING
 484         DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
 485         DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
 486         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
 487         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
 488         DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
 489         DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
 490         DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
 491         DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
 492         DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
 493 #endif
 494 };
 495
 496 static const struct file_operations tegra_drm_fops = {
 497         .owner = THIS_MODULE,
 498         .open = drm_open,
 499         .release = drm_release,
 500         .unlocked_ioctl = drm_ioctl,
 501         .mmap = tegra_drm_mmap,
 502         .poll = drm_poll,
 503         .fasync = drm_fasync,
 504         .read = drm_read,
 505 #ifdef CONFIG_COMPAT
 506         .compat_ioctl = drm_compat_ioctl,
 507 #endif
 508         .llseek = noop_llseek,
 509 };
 510
 511 static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
 512 {
 513         struct drm_crtc *crtc;
 514
 515         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
 516                 struct tegra_dc *dc = to_tegra_dc(crtc);
 517
 518                 if (dc->pipe == pipe)
 519                         return crtc;
 520         }
 521
 522         return NULL;
 523 }
 524
 525 static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
 526 {
 527         /* TODO: implement real hardware counter using syncpoints */
 528         return drm_vblank_count(dev, crtc);
 529 }
 530
 531 static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
 532 {
 533         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 534         struct tegra_dc *dc = to_tegra_dc(crtc);
 535
 536         if (!crtc)
 537                 return -ENODEV;
 538
 539         tegra_dc_enable_vblank(dc);
 540
 541         return 0;
 542 }
 543
 544 static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
 545 {
 546         struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
 547         struct tegra_dc *dc = to_tegra_dc(crtc);
 548
 549         if (crtc)
 550                 tegra_dc_disable_vblank(dc);
 551 }
 552
 553 static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
 554 {
 555         struct host1x_drm_file *fpriv = file->driver_priv;
 556         struct host1x_drm_context *context, *tmp;
 557         struct drm_crtc *crtc;
 558
 559         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 560                 tegra_dc_cancel_page_flip(crtc, file);
 561
 562         list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
 563                 host1x_drm_context_free(context);
 564
 565         kfree(fpriv);
 566 }
 567
 568 #ifdef CONFIG_DEBUG_FS
 569 static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
 570 {
 571         struct drm_info_node *node = (struct drm_info_node *)s->private;
 572         struct drm_device *drm = node->minor->dev;
 573         struct drm_framebuffer *fb;
 574
 575         mutex_lock(&drm->mode_config.fb_lock);
 576
 577         list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
 578                 seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
 579                            fb->base.id, fb->width, fb->height, fb->depth,
 580                            fb->bits_per_pixel,
 581                            atomic_read(&fb->refcount.refcount));
 582         }
 583
 584         mutex_unlock(&drm->mode_config.fb_lock);
 585
 586         return 0;
 587 }
 588
 589 static struct drm_info_list tegra_debugfs_list[] = {
 590         { "framebuffers", tegra_debugfs_framebuffers, 0 },
 591 };
 592
 593 static int tegra_debugfs_init(struct drm_minor *minor)
 594 {
 595         return drm_debugfs_create_files(tegra_debugfs_list,
 596                                         ARRAY_SIZE(tegra_debugfs_list),
 597                                         minor->debugfs_root, minor);
 598 }
 599
 600 static void tegra_debugfs_cleanup(struct drm_minor *minor)
 601 {
 602         drm_debugfs_remove_files(tegra_debugfs_list,
 603                                  ARRAY_SIZE(tegra_debugfs_list), minor);
 604 }
 605 #endif
 606
 607 struct drm_driver tegra_drm_driver = {
 608         .driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,
 609         .load = tegra_drm_load,
 610         .unload = tegra_drm_unload,
 611         .open = tegra_drm_open,
 612         .preclose = tegra_drm_preclose,
 613         .lastclose = tegra_drm_lastclose,
 614
 615         .get_vblank_counter = tegra_drm_get_vblank_counter,
 616         .enable_vblank = tegra_drm_enable_vblank,
 617         .disable_vblank = tegra_drm_disable_vblank,
 618
 619 #if defined(CONFIG_DEBUG_FS)
 620         .debugfs_init = tegra_debugfs_init,
 621         .debugfs_cleanup = tegra_debugfs_cleanup,
 622 #endif
 623
 624         .gem_free_object = tegra_bo_free_object,
 625         .gem_vm_ops = &tegra_bo_vm_ops,
 626         .dumb_create = tegra_bo_dumb_create,
 627         .dumb_map_offset = tegra_bo_dumb_map_offset,
 628         .dumb_destroy = tegra_bo_dumb_destroy,
 629
 630         .ioctls = tegra_drm_ioctls,
 631         .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
 632         .fops = &tegra_drm_fops,
 633
 634         .name = DRIVER_NAME,
 635         .desc = DRIVER_DESC,
 636         .date = DRIVER_DATE,
 637         .major = DRIVER_MAJOR,
 638         .minor = DRIVER_MINOR,
 639         .patchlevel = DRIVER_PATCHLEVEL,
 640 };