drivers/gpu/drm/msm/msm_drv.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "msm_drv.h"
  19 #include "msm_gpu.h"
  20 #include "msm_kms.h"
  21
  22 static void msm_fb_output_poll_changed(struct drm_device *dev)
  23 {
  24         struct msm_drm_private *priv = dev->dev_private;
  25         if (priv->fbdev)
  26                 drm_fb_helper_hotplug_event(priv->fbdev);
  27 }
  28
  29 static const struct drm_mode_config_funcs mode_config_funcs = {
  30         .fb_create = msm_framebuffer_create,
  31         .output_poll_changed = msm_fb_output_poll_changed,
  32 };
  33
  34 int msm_register_mmu(struct drm_device *dev, struct msm_mmu *mmu)
  35 {
  36         struct msm_drm_private *priv = dev->dev_private;
  37         int idx = priv->num_mmus++;
  38
  39         if (WARN_ON(idx >= ARRAY_SIZE(priv->mmus)))
  40                 return -EINVAL;
  41
  42         priv->mmus[idx] = mmu;
  43
  44         return idx;
  45 }
  46
  47 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
  48 static bool reglog = false;
  49 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
  50 module_param(reglog, bool, 0600);
  51 #else
  52 #define reglog 0
  53 #endif
  54
  55 static char *vram;
  56 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU");
  57 module_param(vram, charp, 0);
  58
  59 /*
  60  * Util/helpers:
  61  */
  62
  63 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
  64                 const char *dbgname)
  65 {
  66         struct resource *res;
  67         unsigned long size;
  68         void __iomem *ptr;
  69
  70         if (name)
  71                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
  72         else
  73                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  74
  75         if (!res) {
  76                 dev_err(&pdev->dev, "failed to get memory resource: %s\n", name);
  77                 return ERR_PTR(-EINVAL);
  78         }
  79
  80         size = resource_size(res);
  81
  82         ptr = devm_ioremap_nocache(&pdev->dev, res->start, size);
  83         if (!ptr) {
  84                 dev_err(&pdev->dev, "failed to ioremap: %s\n", name);
  85                 return ERR_PTR(-ENOMEM);
  86         }
  87
  88         if (reglog)
  89                 printk(KERN_DEBUG "IO:region %s %08x %08lx\n", dbgname, (u32)ptr, size);
  90
  91         return ptr;
  92 }
  93
  94 void msm_writel(u32 data, void __iomem *addr)
  95 {
  96         if (reglog)
  97                 printk(KERN_DEBUG "IO:W %08x %08x\n", (u32)addr, data);
  98         writel(data, addr);
  99 }
 100
 101 u32 msm_readl(const void __iomem *addr)
 102 {
 103         u32 val = readl(addr);
 104         if (reglog)
 105                 printk(KERN_ERR "IO:R %08x %08x\n", (u32)addr, val);
 106         return val;
 107 }
 108
 109 /*
 110  * DRM operations:
 111  */
 112
 113 static int msm_unload(struct drm_device *dev)
 114 {
 115         struct msm_drm_private *priv = dev->dev_private;
 116         struct msm_kms *kms = priv->kms;
 117         struct msm_gpu *gpu = priv->gpu;
 118
 119         drm_kms_helper_poll_fini(dev);
 120         drm_mode_config_cleanup(dev);
 121         drm_vblank_cleanup(dev);
 122
 123         pm_runtime_get_sync(dev->dev);
 124         drm_irq_uninstall(dev);
 125         pm_runtime_put_sync(dev->dev);
 126
 127         flush_workqueue(priv->wq);
 128         destroy_workqueue(priv->wq);
 129
 130         if (kms) {
 131                 pm_runtime_disable(dev->dev);
 132                 kms->funcs->destroy(kms);
 133         }
 134
 135         if (gpu) {
 136                 mutex_lock(&dev->struct_mutex);
 137                 gpu->funcs->pm_suspend(gpu);
 138                 gpu->funcs->destroy(gpu);
 139                 mutex_unlock(&dev->struct_mutex);
 140         }
 141
 142         if (priv->vram.paddr) {
 143                 DEFINE_DMA_ATTRS(attrs);
 144                 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
 145                 drm_mm_takedown(&priv->vram.mm);
 146                 dma_free_attrs(dev->dev, priv->vram.size, NULL,
 147                                 priv->vram.paddr, &attrs);
 148         }
 149
 150         component_unbind_all(dev->dev, dev);
 151
 152         dev->dev_private = NULL;
 153
 154         kfree(priv);
 155
 156         return 0;
 157 }
 158
 159 static int get_mdp_ver(struct platform_device *pdev)
 160 {
 161 #ifdef CONFIG_OF
 162         const static struct of_device_id match_types[] = { {
 163                 .compatible = "qcom,mdss_mdp",
 164                 .data   = (void *)5,
 165         }, {
 166                 /* end node */
 167         } };
 168         struct device *dev = &pdev->dev;
 169         const struct of_device_id *match;
 170         match = of_match_node(match_types, dev->of_node);
 171         if (match)
 172                 return (int)match->data;
 173 #endif
 174         return 4;
 175 }
 176
 177 static int msm_load(struct drm_device *dev, unsigned long flags)
 178 {
 179         struct platform_device *pdev = dev->platformdev;
 180         struct msm_drm_private *priv;
 181         struct msm_kms *kms;
 182         int ret;
 183
 184
 185         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 186         if (!priv) {
 187                 dev_err(dev->dev, "failed to allocate private data\n");
 188                 return -ENOMEM;
 189         }
 190
 191         dev->dev_private = priv;
 192
 193         priv->wq = alloc_ordered_workqueue("msm", 0);
 194         init_waitqueue_head(&priv->fence_event);
 195
 196         INIT_LIST_HEAD(&priv->inactive_list);
 197         INIT_LIST_HEAD(&priv->fence_cbs);
 198
 199         drm_mode_config_init(dev);
 200
 201         /* if we have no IOMMU, then we need to use carveout allocator.
 202          * Grab the entire CMA chunk carved out in early startup in
 203          * mach-msm:
 204          */
 205         if (!iommu_present(&platform_bus_type)) {
 206                 DEFINE_DMA_ATTRS(attrs);
 207                 unsigned long size;
 208                 void *p;
 209
 210                 DBG("using %s VRAM carveout", vram);
 211                 size = memparse(vram, NULL);
 212                 priv->vram.size = size;
 213
 214                 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
 215
 216                 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
 217                 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
 218
 219                 /* note that for no-kernel-mapping, the vaddr returned
 220                  * is bogus, but non-null if allocation succeeded:
 221                  */
 222                 p = dma_alloc_attrs(dev->dev, size,
 223                                 &priv->vram.paddr, 0, &attrs);
 224                 if (!p) {
 225                         dev_err(dev->dev, "failed to allocate VRAM\n");
 226                         priv->vram.paddr = 0;
 227                         ret = -ENOMEM;
 228                         goto fail;
 229                 }
 230
 231                 dev_info(dev->dev, "VRAM: %08x->%08x\n",
 232                                 (uint32_t)priv->vram.paddr,
 233                                 (uint32_t)(priv->vram.paddr + size));
 234         }
 235
 236         platform_set_drvdata(pdev, dev);
 237
 238         /* Bind all our sub-components: */
 239         ret = component_bind_all(dev->dev, dev);
 240         if (ret)
 241                 return ret;
 242
 243         switch (get_mdp_ver(pdev)) {
 244         case 4:
 245                 kms = mdp4_kms_init(dev);
 246                 break;
 247         case 5:
 248                 kms = mdp5_kms_init(dev);
 249                 break;
 250         default:
 251                 kms = ERR_PTR(-ENODEV);
 252                 break;
 253         }
 254
 255         if (IS_ERR(kms)) {
 256                 /*
 257                  * NOTE: once we have GPU support, having no kms should not
 258                  * be considered fatal.. ideally we would still support gpu
 259                  * and (for example) use dmabuf/prime to share buffers with
 260                  * imx drm driver on iMX5
 261                  */
 262                 dev_err(dev->dev, "failed to load kms\n");
 263                 ret = PTR_ERR(kms);
 264                 goto fail;
 265         }
 266
 267         priv->kms = kms;
 268
 269         if (kms) {
 270                 pm_runtime_enable(dev->dev);
 271                 ret = kms->funcs->hw_init(kms);
 272                 if (ret) {
 273                         dev_err(dev->dev, "kms hw init failed: %d\n", ret);
 274                         goto fail;
 275                 }
 276         }
 277
 278         dev->mode_config.min_width = 0;
 279         dev->mode_config.min_height = 0;
 280         dev->mode_config.max_width = 2048;
 281         dev->mode_config.max_height = 2048;
 282         dev->mode_config.funcs = &mode_config_funcs;
 283
 284         ret = drm_vblank_init(dev, 1);
 285         if (ret < 0) {
 286                 dev_err(dev->dev, "failed to initialize vblank\n");
 287                 goto fail;
 288         }
 289
 290         pm_runtime_get_sync(dev->dev);
 291         ret = drm_irq_install(dev);
 292         pm_runtime_put_sync(dev->dev);
 293         if (ret < 0) {
 294                 dev_err(dev->dev, "failed to install IRQ handler\n");
 295                 goto fail;
 296         }
 297
 298 #ifdef CONFIG_DRM_MSM_FBDEV
 299         priv->fbdev = msm_fbdev_init(dev);
 300 #endif
 301
 302         drm_kms_helper_poll_init(dev);
 303
 304         return 0;
 305
 306 fail:
 307         msm_unload(dev);
 308         return ret;
 309 }
 310
 311 static void load_gpu(struct drm_device *dev)
 312 {
 313         struct msm_drm_private *priv = dev->dev_private;
 314         struct msm_gpu *gpu;
 315
 316         if (priv->gpu)
 317                 return;
 318
 319         mutex_lock(&dev->struct_mutex);
 320         gpu = a3xx_gpu_init(dev);
 321         if (IS_ERR(gpu)) {
 322                 dev_warn(dev->dev, "failed to load a3xx gpu\n");
 323                 gpu = NULL;
 324                 /* not fatal */
 325         }
 326
 327         if (gpu) {
 328                 int ret;
 329                 gpu->funcs->pm_resume(gpu);
 330                 ret = gpu->funcs->hw_init(gpu);
 331                 if (ret) {
 332                         dev_err(dev->dev, "gpu hw init failed: %d\n", ret);
 333                         gpu->funcs->destroy(gpu);
 334                         gpu = NULL;
 335                 } else {
 336                         /* give inactive pm a chance to kick in: */
 337                         msm_gpu_retire(gpu);
 338                 }
 339
 340         }
 341
 342         priv->gpu = gpu;
 343
 344         mutex_unlock(&dev->struct_mutex);
 345 }
 346
 347 static int msm_open(struct drm_device *dev, struct drm_file *file)
 348 {
 349         struct msm_file_private *ctx;
 350
 351         /* For now, load gpu on open.. to avoid the requirement of having
 352          * firmware in the initrd.
 353          */
 354         load_gpu(dev);
 355
 356         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 357         if (!ctx)
 358                 return -ENOMEM;
 359
 360         file->driver_priv = ctx;
 361
 362         return 0;
 363 }
 364
 365 static void msm_preclose(struct drm_device *dev, struct drm_file *file)
 366 {
 367         struct msm_drm_private *priv = dev->dev_private;
 368         struct msm_file_private *ctx = file->driver_priv;
 369         struct msm_kms *kms = priv->kms;
 370
 371         if (kms)
 372                 kms->funcs->preclose(kms, file);
 373
 374         mutex_lock(&dev->struct_mutex);
 375         if (ctx == priv->lastctx)
 376                 priv->lastctx = NULL;
 377         mutex_unlock(&dev->struct_mutex);
 378
 379         kfree(ctx);
 380 }
 381
 382 static void msm_lastclose(struct drm_device *dev)
 383 {
 384         struct msm_drm_private *priv = dev->dev_private;
 385         if (priv->fbdev) {
 386                 drm_modeset_lock_all(dev);
 387                 drm_fb_helper_restore_fbdev_mode(priv->fbdev);
 388                 drm_modeset_unlock_all(dev);
 389         }
 390 }
 391
 392 static irqreturn_t msm_irq(int irq, void *arg)
 393 {
 394         struct drm_device *dev = arg;
 395         struct msm_drm_private *priv = dev->dev_private;
 396         struct msm_kms *kms = priv->kms;
 397         BUG_ON(!kms);
 398         return kms->funcs->irq(kms);
 399 }
 400
 401 static void msm_irq_preinstall(struct drm_device *dev)
 402 {
 403         struct msm_drm_private *priv = dev->dev_private;
 404         struct msm_kms *kms = priv->kms;
 405         BUG_ON(!kms);
 406         kms->funcs->irq_preinstall(kms);
 407 }
 408
 409 static int msm_irq_postinstall(struct drm_device *dev)
 410 {
 411         struct msm_drm_private *priv = dev->dev_private;
 412         struct msm_kms *kms = priv->kms;
 413         BUG_ON(!kms);
 414         return kms->funcs->irq_postinstall(kms);
 415 }
 416
 417 static void msm_irq_uninstall(struct drm_device *dev)
 418 {
 419         struct msm_drm_private *priv = dev->dev_private;
 420         struct msm_kms *kms = priv->kms;
 421         BUG_ON(!kms);
 422         kms->funcs->irq_uninstall(kms);
 423 }
 424
 425 static int msm_enable_vblank(struct drm_device *dev, int crtc_id)
 426 {
 427         struct msm_drm_private *priv = dev->dev_private;
 428         struct msm_kms *kms = priv->kms;
 429         if (!kms)
 430                 return -ENXIO;
 431         DBG("dev=%p, crtc=%d", dev, crtc_id);
 432         return kms->funcs->enable_vblank(kms, priv->crtcs[crtc_id]);
 433 }
 434
 435 static void msm_disable_vblank(struct drm_device *dev, int crtc_id)
 436 {
 437         struct msm_drm_private *priv = dev->dev_private;
 438         struct msm_kms *kms = priv->kms;
 439         if (!kms)
 440                 return;
 441         DBG("dev=%p, crtc=%d", dev, crtc_id);
 442         kms->funcs->disable_vblank(kms, priv->crtcs[crtc_id]);
 443 }
 444
 445 /*
 446  * DRM debugfs:
 447  */
 448
 449 #ifdef CONFIG_DEBUG_FS
 450 static int msm_gpu_show(struct drm_device *dev, struct seq_file *m)
 451 {
 452         struct msm_drm_private *priv = dev->dev_private;
 453         struct msm_gpu *gpu = priv->gpu;
 454
 455         if (gpu) {
 456                 seq_printf(m, "%s Status:\n", gpu->name);
 457                 gpu->funcs->show(gpu, m);
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int msm_gem_show(struct drm_device *dev, struct seq_file *m)
 464 {
 465         struct msm_drm_private *priv = dev->dev_private;
 466         struct msm_gpu *gpu = priv->gpu;
 467
 468         if (gpu) {
 469                 seq_printf(m, "Active Objects (%s):\n", gpu->name);
 470                 msm_gem_describe_objects(&gpu->active_list, m);
 471         }
 472
 473         seq_printf(m, "Inactive Objects:\n");
 474         msm_gem_describe_objects(&priv->inactive_list, m);
 475
 476         return 0;
 477 }
 478
 479 static int msm_mm_show(struct drm_device *dev, struct seq_file *m)
 480 {
 481         return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
 482 }
 483
 484 static int msm_fb_show(struct drm_device *dev, struct seq_file *m)
 485 {
 486         struct msm_drm_private *priv = dev->dev_private;
 487         struct drm_framebuffer *fb, *fbdev_fb = NULL;
 488
 489         if (priv->fbdev) {
 490                 seq_printf(m, "fbcon ");
 491                 fbdev_fb = priv->fbdev->fb;
 492                 msm_framebuffer_describe(fbdev_fb, m);
 493         }
 494
 495         mutex_lock(&dev->mode_config.fb_lock);
 496         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 497                 if (fb == fbdev_fb)
 498                         continue;
 499
 500                 seq_printf(m, "user ");
 501                 msm_framebuffer_describe(fb, m);
 502         }
 503         mutex_unlock(&dev->mode_config.fb_lock);
 504
 505         return 0;
 506 }
 507
 508 static int show_locked(struct seq_file *m, void *arg)
 509 {
 510         struct drm_info_node *node = (struct drm_info_node *) m->private;
 511         struct drm_device *dev = node->minor->dev;
 512         int (*show)(struct drm_device *dev, struct seq_file *m) =
 513                         node->info_ent->data;
 514         int ret;
 515
 516         ret = mutex_lock_interruptible(&dev->struct_mutex);
 517         if (ret)
 518                 return ret;
 519
 520         ret = show(dev, m);
 521
 522         mutex_unlock(&dev->struct_mutex);
 523
 524         return ret;
 525 }
 526
 527 static struct drm_info_list msm_debugfs_list[] = {
 528                 {"gpu", show_locked, 0, msm_gpu_show},
 529                 {"gem", show_locked, 0, msm_gem_show},
 530                 { "mm", show_locked, 0, msm_mm_show },
 531                 { "fb", show_locked, 0, msm_fb_show },
 532 };
 533
 534 static int msm_debugfs_init(struct drm_minor *minor)
 535 {
 536         struct drm_device *dev = minor->dev;
 537         int ret;
 538
 539         ret = drm_debugfs_create_files(msm_debugfs_list,
 540                         ARRAY_SIZE(msm_debugfs_list),
 541                         minor->debugfs_root, minor);
 542
 543         if (ret) {
 544                 dev_err(dev->dev, "could not install msm_debugfs_list\n");
 545                 return ret;
 546         }
 547
 548         return ret;
 549 }
 550
 551 static void msm_debugfs_cleanup(struct drm_minor *minor)
 552 {
 553         drm_debugfs_remove_files(msm_debugfs_list,
 554                         ARRAY_SIZE(msm_debugfs_list), minor);
 555 }
 556 #endif
 557
 558 /*
 559  * Fences:
 560  */
 561
 562 int msm_wait_fence_interruptable(struct drm_device *dev, uint32_t fence,
 563                 struct timespec *timeout)
 564 {
 565         struct msm_drm_private *priv = dev->dev_private;
 566         int ret;
 567
 568         if (!priv->gpu)
 569                 return 0;
 570
 571         if (fence > priv->gpu->submitted_fence) {
 572                 DRM_ERROR("waiting on invalid fence: %u (of %u)\n",
 573                                 fence, priv->gpu->submitted_fence);
 574                 return -EINVAL;
 575         }
 576
 577         if (!timeout) {
 578                 /* no-wait: */
 579                 ret = fence_completed(dev, fence) ? 0 : -EBUSY;
 580         } else {
 581                 unsigned long timeout_jiffies = timespec_to_jiffies(timeout);
 582                 unsigned long start_jiffies = jiffies;
 583                 unsigned long remaining_jiffies;
 584
 585                 if (time_after(start_jiffies, timeout_jiffies))
 586                         remaining_jiffies = 0;
 587                 else
 588                         remaining_jiffies = timeout_jiffies - start_jiffies;
 589
 590                 ret = wait_event_interruptible_timeout(priv->fence_event,
 591                                 fence_completed(dev, fence),
 592                                 remaining_jiffies);
 593
 594                 if (ret == 0) {
 595                         DBG("timeout waiting for fence: %u (completed: %u)",
 596                                         fence, priv->completed_fence);
 597                         ret = -ETIMEDOUT;
 598                 } else if (ret != -ERESTARTSYS) {
 599                         ret = 0;
 600                 }
 601         }
 602
 603         return ret;
 604 }
 605
 606 /* called from workqueue */
 607 void msm_update_fence(struct drm_device *dev, uint32_t fence)
 608 {
 609         struct msm_drm_private *priv = dev->dev_private;
 610
 611         mutex_lock(&dev->struct_mutex);
 612         priv->completed_fence = max(fence, priv->completed_fence);
 613
 614         while (!list_empty(&priv->fence_cbs)) {
 615                 struct msm_fence_cb *cb;
 616
 617                 cb = list_first_entry(&priv->fence_cbs,
 618                                 struct msm_fence_cb, work.entry);
 619
 620                 if (cb->fence > priv->completed_fence)
 621                         break;
 622
 623                 list_del_init(&cb->work.entry);
 624                 queue_work(priv->wq, &cb->work);
 625         }
 626
 627         mutex_unlock(&dev->struct_mutex);
 628
 629         wake_up_all(&priv->fence_event);
 630 }
 631
 632 void __msm_fence_worker(struct work_struct *work)
 633 {
 634         struct msm_fence_cb *cb = container_of(work, struct msm_fence_cb, work);
 635         cb->func(cb);
 636 }
 637
 638 /*
 639  * DRM ioctls:
 640  */
 641
 642 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
 643                 struct drm_file *file)
 644 {
 645         struct msm_drm_private *priv = dev->dev_private;
 646         struct drm_msm_param *args = data;
 647         struct msm_gpu *gpu;
 648
 649         /* for now, we just have 3d pipe.. eventually this would need to
 650          * be more clever to dispatch to appropriate gpu module:
 651          */
 652         if (args->pipe != MSM_PIPE_3D0)
 653                 return -EINVAL;
 654
 655         gpu = priv->gpu;
 656
 657         if (!gpu)
 658                 return -ENXIO;
 659
 660         return gpu->funcs->get_param(gpu, args->param, &args->value);
 661 }
 662
 663 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
 664                 struct drm_file *file)
 665 {
 666         struct drm_msm_gem_new *args = data;
 667         return msm_gem_new_handle(dev, file, args->size,
 668                         args->flags, &args->handle);
 669 }
 670
 671 #define TS(t) ((struct timespec){ .tv_sec = (t).tv_sec, .tv_nsec = (t).tv_nsec })
 672
 673 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 674                 struct drm_file *file)
 675 {
 676         struct drm_msm_gem_cpu_prep *args = data;
 677         struct drm_gem_object *obj;
 678         int ret;
 679
 680         obj = drm_gem_object_lookup(dev, file, args->handle);
 681         if (!obj)
 682                 return -ENOENT;
 683
 684         ret = msm_gem_cpu_prep(obj, args->op, &TS(args->timeout));
 685
 686         drm_gem_object_unreference_unlocked(obj);
 687
 688         return ret;
 689 }
 690
 691 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 692                 struct drm_file *file)
 693 {
 694         struct drm_msm_gem_cpu_fini *args = data;
 695         struct drm_gem_object *obj;
 696         int ret;
 697
 698         obj = drm_gem_object_lookup(dev, file, args->handle);
 699         if (!obj)
 700                 return -ENOENT;
 701
 702         ret = msm_gem_cpu_fini(obj);
 703
 704         drm_gem_object_unreference_unlocked(obj);
 705
 706         return ret;
 707 }
 708
 709 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
 710                 struct drm_file *file)
 711 {
 712         struct drm_msm_gem_info *args = data;
 713         struct drm_gem_object *obj;
 714         int ret = 0;
 715
 716         if (args->pad)
 717                 return -EINVAL;
 718
 719         obj = drm_gem_object_lookup(dev, file, args->handle);
 720         if (!obj)
 721                 return -ENOENT;
 722
 723         args->offset = msm_gem_mmap_offset(obj);
 724
 725         drm_gem_object_unreference_unlocked(obj);
 726
 727         return ret;
 728 }
 729
 730 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
 731                 struct drm_file *file)
 732 {
 733         struct drm_msm_wait_fence *args = data;
 734         return msm_wait_fence_interruptable(dev, args->fence, &TS(args->timeout));
 735 }
 736
 737 static const struct drm_ioctl_desc msm_ioctls[] = {
 738         DRM_IOCTL_DEF_DRV(MSM_GET_PARAM,    msm_ioctl_get_param,    DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 739         DRM_IOCTL_DEF_DRV(MSM_GEM_NEW,      msm_ioctl_gem_new,      DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 740         DRM_IOCTL_DEF_DRV(MSM_GEM_INFO,     msm_ioctl_gem_info,     DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 741         DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 742         DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 743         DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT,   msm_ioctl_gem_submit,   DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 744         DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE,   msm_ioctl_wait_fence,   DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 745 };
 746
 747 static const struct vm_operations_struct vm_ops = {
 748         .fault = msm_gem_fault,
 749         .open = drm_gem_vm_open,
 750         .close = drm_gem_vm_close,
 751 };
 752
 753 static const struct file_operations fops = {
 754         .owner              = THIS_MODULE,
 755         .open               = drm_open,
 756         .release            = drm_release,
 757         .unlocked_ioctl     = drm_ioctl,
 758 #ifdef CONFIG_COMPAT
 759         .compat_ioctl       = drm_compat_ioctl,
 760 #endif
 761         .poll               = drm_poll,
 762         .read               = drm_read,
 763         .llseek             = no_llseek,
 764         .mmap               = msm_gem_mmap,
 765 };
 766
 767 static struct drm_driver msm_driver = {
 768         .driver_features    = DRIVER_HAVE_IRQ |
 769                                 DRIVER_GEM |
 770                                 DRIVER_PRIME |
 771                                 DRIVER_RENDER |
 772                                 DRIVER_MODESET,
 773         .load               = msm_load,
 774         .unload             = msm_unload,
 775         .open               = msm_open,
 776         .preclose           = msm_preclose,
 777         .lastclose          = msm_lastclose,
 778         .irq_handler        = msm_irq,
 779         .irq_preinstall     = msm_irq_preinstall,
 780         .irq_postinstall    = msm_irq_postinstall,
 781         .irq_uninstall      = msm_irq_uninstall,
 782         .get_vblank_counter = drm_vblank_count,
 783         .enable_vblank      = msm_enable_vblank,
 784         .disable_vblank     = msm_disable_vblank,
 785         .gem_free_object    = msm_gem_free_object,
 786         .gem_vm_ops         = &vm_ops,
 787         .dumb_create        = msm_gem_dumb_create,
 788         .dumb_map_offset    = msm_gem_dumb_map_offset,
 789         .dumb_destroy       = drm_gem_dumb_destroy,
 790         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 791         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 792         .gem_prime_export   = drm_gem_prime_export,
 793         .gem_prime_import   = drm_gem_prime_import,
 794         .gem_prime_pin      = msm_gem_prime_pin,
 795         .gem_prime_unpin    = msm_gem_prime_unpin,
 796         .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,
 797         .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
 798         .gem_prime_vmap     = msm_gem_prime_vmap,
 799         .gem_prime_vunmap   = msm_gem_prime_vunmap,
 800 #ifdef CONFIG_DEBUG_FS
 801         .debugfs_init       = msm_debugfs_init,
 802         .debugfs_cleanup    = msm_debugfs_cleanup,
 803 #endif
 804         .ioctls             = msm_ioctls,
 805         .num_ioctls         = DRM_MSM_NUM_IOCTLS,
 806         .fops               = &fops,
 807         .name               = "msm",
 808         .desc               = "MSM Snapdragon DRM",
 809         .date               = "20130625",
 810         .major              = 1,
 811         .minor              = 0,
 812 };
 813
 814 #ifdef CONFIG_PM_SLEEP
 815 static int msm_pm_suspend(struct device *dev)
 816 {
 817         struct drm_device *ddev = dev_get_drvdata(dev);
 818
 819         drm_kms_helper_poll_disable(ddev);
 820
 821         return 0;
 822 }
 823
 824 static int msm_pm_resume(struct device *dev)
 825 {
 826         struct drm_device *ddev = dev_get_drvdata(dev);
 827
 828         drm_kms_helper_poll_enable(ddev);
 829
 830         return 0;
 831 }
 832 #endif
 833
 834 static const struct dev_pm_ops msm_pm_ops = {
 835         SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume)
 836 };
 837
 838 /*
 839  * Componentized driver support:
 840  */
 841
 842 #ifdef CONFIG_OF
 843 /* NOTE: the CONFIG_OF case duplicates the same code as exynos or imx
 844  * (or probably any other).. so probably some room for some helpers
 845  */
 846 static int compare_of(struct device *dev, void *data)
 847 {
 848         return dev->of_node == data;
 849 }
 850
 851 static int msm_drm_add_components(struct device *master, struct master *m)
 852 {
 853         struct device_node *np = master->of_node;
 854         unsigned i;
 855         int ret;
 856
 857         for (i = 0; ; i++) {
 858                 struct device_node *node;
 859
 860                 node = of_parse_phandle(np, "connectors", i);
 861                 if (!node)
 862                         break;
 863
 864                 ret = component_master_add_child(m, compare_of, node);
 865                 of_node_put(node);
 866
 867                 if (ret)
 868                         return ret;
 869         }
 870         return 0;
 871 }
 872 #else
 873 static int compare_dev(struct device *dev, void *data)
 874 {
 875         return dev == data;
 876 }
 877
 878 static int msm_drm_add_components(struct device *master, struct master *m)
 879 {
 880         /* For non-DT case, it kinda sucks.  We don't actually have a way
 881          * to know whether or not we are waiting for certain devices (or if
 882          * they are simply not present).  But for non-DT we only need to
 883          * care about apq8064/apq8060/etc (all mdp4/a3xx):
 884          */
 885         static const char *devnames[] = {
 886                         "hdmi_msm.0", "kgsl-3d0.0",
 887         };
 888         int i;
 889
 890         DBG("Adding components..");
 891
 892         for (i = 0; i < ARRAY_SIZE(devnames); i++) {
 893                 struct device *dev;
 894                 int ret;
 895
 896                 dev = bus_find_device_by_name(&platform_bus_type,
 897                                 NULL, devnames[i]);
 898                 if (!dev) {
 899                         dev_info(master, "still waiting for %s\n", devnames[i]);
 900                         return -EPROBE_DEFER;
 901                 }
 902
 903                 ret = component_master_add_child(m, compare_dev, dev);
 904                 if (ret) {
 905                         DBG("could not add child: %d", ret);
 906                         return ret;
 907                 }
 908         }
 909
 910         return 0;
 911 }
 912 #endif
 913
 914 static int msm_drm_bind(struct device *dev)
 915 {
 916         return drm_platform_init(&msm_driver, to_platform_device(dev));
 917 }
 918
 919 static void msm_drm_unbind(struct device *dev)
 920 {
 921         drm_put_dev(platform_get_drvdata(to_platform_device(dev)));
 922 }
 923
 924 static const struct component_master_ops msm_drm_ops = {
 925                 .add_components = msm_drm_add_components,
 926                 .bind = msm_drm_bind,
 927                 .unbind = msm_drm_unbind,
 928 };
 929
 930 /*
 931  * Platform driver:
 932  */
 933
 934 static int msm_pdev_probe(struct platform_device *pdev)
 935 {
 936         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 937         return component_master_add(&pdev->dev, &msm_drm_ops);
 938 }
 939
 940 static int msm_pdev_remove(struct platform_device *pdev)
 941 {
 942         component_master_del(&pdev->dev, &msm_drm_ops);
 943
 944         return 0;
 945 }
 946
 947 static const struct platform_device_id msm_id[] = {
 948         { "mdp", 0 },
 949         { }
 950 };
 951
 952 static const struct of_device_id dt_match[] = {
 953         { .compatible = "qcom,mdss_mdp" },
 954         {}
 955 };
 956 MODULE_DEVICE_TABLE(of, dt_match);
 957
 958 static struct platform_driver msm_platform_driver = {
 959         .probe      = msm_pdev_probe,
 960         .remove     = msm_pdev_remove,
 961         .driver     = {
 962                 .owner  = THIS_MODULE,
 963                 .name   = "msm",
 964                 .of_match_table = dt_match,
 965                 .pm     = &msm_pm_ops,
 966         },
 967         .id_table   = msm_id,
 968 };
 969
 970 static int __init msm_drm_register(void)
 971 {
 972         DBG("init");
 973         hdmi_register();
 974         a3xx_register();
 975         return platform_driver_register(&msm_platform_driver);
 976 }
 977
 978 static void __exit msm_drm_unregister(void)
 979 {
 980         DBG("fini");
 981         platform_driver_unregister(&msm_platform_driver);
 982         hdmi_unregister();
 983         a3xx_unregister();
 984 }
 985
 986 module_init(msm_drm_register);
 987 module_exit(msm_drm_unregister);
 988
 989 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
 990 MODULE_DESCRIPTION("MSM DRM Driver");
 991 MODULE_LICENSE("GPL");