drivers/gpu/drm/etnaviv/etnaviv_drv.c

   1 /*
   2  * Copyright (C) 2015 Etnaviv Project
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published by
   6  * the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <linux/component.h>
  18 #include <linux/of_platform.h>
  19
  20 #include "etnaviv_drv.h"
  21 #include "etnaviv_gpu.h"
  22 #include "etnaviv_gem.h"
  23 #include "etnaviv_mmu.h"
  24 #include "etnaviv_gem.h"
  25
  26 #ifdef CONFIG_DRM_ETNAVIV_REGISTER_LOGGING
  27 static bool reglog;
  28 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
  29 module_param(reglog, bool, 0600);
  30 #else
  31 #define reglog 0
  32 #endif
  33
  34 void __iomem *etnaviv_ioremap(struct platform_device *pdev, const char *name,
  35                 const char *dbgname)
  36 {
  37         struct resource *res;
  38         void __iomem *ptr;
  39
  40         if (name)
  41                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
  42         else
  43                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  44
  45         ptr = devm_ioremap_resource(&pdev->dev, res);
  46         if (IS_ERR(ptr)) {
  47                 dev_err(&pdev->dev, "failed to ioremap %s: %ld\n", name,
  48                         PTR_ERR(ptr));
  49                 return ptr;
  50         }
  51
  52         if (reglog)
  53                 dev_printk(KERN_DEBUG, &pdev->dev, "IO:region %s 0x%p %08zx\n",
  54                            dbgname, ptr, (size_t)resource_size(res));
  55
  56         return ptr;
  57 }
  58
  59 void etnaviv_writel(u32 data, void __iomem *addr)
  60 {
  61         if (reglog)
  62                 printk(KERN_DEBUG "IO:W %p %08x\n", addr, data);
  63
  64         writel(data, addr);
  65 }
  66
  67 u32 etnaviv_readl(const void __iomem *addr)
  68 {
  69         u32 val = readl(addr);
  70
  71         if (reglog)
  72                 printk(KERN_DEBUG "IO:R %p %08x\n", addr, val);
  73
  74         return val;
  75 }
  76
  77 /*
  78  * DRM operations:
  79  */
  80
  81
  82 static void load_gpu(struct drm_device *dev)
  83 {
  84         struct etnaviv_drm_private *priv = dev->dev_private;
  85         unsigned int i;
  86
  87         for (i = 0; i < ETNA_MAX_PIPES; i++) {
  88                 struct etnaviv_gpu *g = priv->gpu[i];
  89
  90                 if (g) {
  91                         int ret;
  92
  93                         ret = etnaviv_gpu_init(g);
  94                         if (ret)
  95                                 priv->gpu[i] = NULL;
  96                 }
  97         }
  98 }
  99
 100 static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
 101 {
 102         struct etnaviv_file_private *ctx;
 103
 104         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 105         if (!ctx)
 106                 return -ENOMEM;
 107
 108         file->driver_priv = ctx;
 109
 110         return 0;
 111 }
 112
 113 static void etnaviv_preclose(struct drm_device *dev, struct drm_file *file)
 114 {
 115         struct etnaviv_drm_private *priv = dev->dev_private;
 116         struct etnaviv_file_private *ctx = file->driver_priv;
 117         unsigned int i;
 118
 119         for (i = 0; i < ETNA_MAX_PIPES; i++) {
 120                 struct etnaviv_gpu *gpu = priv->gpu[i];
 121
 122                 if (gpu) {
 123                         mutex_lock(&gpu->lock);
 124                         if (gpu->lastctx == ctx)
 125                                 gpu->lastctx = NULL;
 126                         mutex_unlock(&gpu->lock);
 127                 }
 128         }
 129
 130         kfree(ctx);
 131 }
 132
 133 /*
 134  * DRM debugfs:
 135  */
 136
 137 #ifdef CONFIG_DEBUG_FS
 138 static int etnaviv_gem_show(struct drm_device *dev, struct seq_file *m)
 139 {
 140         struct etnaviv_drm_private *priv = dev->dev_private;
 141
 142         etnaviv_gem_describe_objects(priv, m);
 143
 144         return 0;
 145 }
 146
 147 static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
 148 {
 149         int ret;
 150
 151         read_lock(&dev->vma_offset_manager->vm_lock);
 152         ret = drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
 153         read_unlock(&dev->vma_offset_manager->vm_lock);
 154
 155         return ret;
 156 }
 157
 158 static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
 159 {
 160         seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));
 161
 162         mutex_lock(&gpu->mmu->lock);
 163         drm_mm_dump_table(m, &gpu->mmu->mm);
 164         mutex_unlock(&gpu->mmu->lock);
 165
 166         return 0;
 167 }
 168
 169 static void etnaviv_buffer_dump(struct etnaviv_gpu *gpu, struct seq_file *m)
 170 {
 171         struct etnaviv_cmdbuf *buf = gpu->buffer;
 172         u32 size = buf->size;
 173         u32 *ptr = buf->vaddr;
 174         u32 i;
 175
 176         seq_printf(m, "virt %p - phys 0x%llx - free 0x%08x\n",
 177                         buf->vaddr, (u64)buf->paddr, size - buf->user_size);
 178
 179         for (i = 0; i < size / 4; i++) {
 180                 if (i && !(i % 4))
 181                         seq_puts(m, "\n");
 182                 if (i % 4 == 0)
 183                         seq_printf(m, "\t0x%p: ", ptr + i);
 184                 seq_printf(m, "%08x ", *(ptr + i));
 185         }
 186         seq_puts(m, "\n");
 187 }
 188
 189 static int etnaviv_ring_show(struct etnaviv_gpu *gpu, struct seq_file *m)
 190 {
 191         seq_printf(m, "Ring Buffer (%s): ", dev_name(gpu->dev));
 192
 193         mutex_lock(&gpu->lock);
 194         etnaviv_buffer_dump(gpu, m);
 195         mutex_unlock(&gpu->lock);
 196
 197         return 0;
 198 }
 199
 200 static int show_unlocked(struct seq_file *m, void *arg)
 201 {
 202         struct drm_info_node *node = (struct drm_info_node *) m->private;
 203         struct drm_device *dev = node->minor->dev;
 204         int (*show)(struct drm_device *dev, struct seq_file *m) =
 205                         node->info_ent->data;
 206
 207         return show(dev, m);
 208 }
 209
 210 static int show_each_gpu(struct seq_file *m, void *arg)
 211 {
 212         struct drm_info_node *node = (struct drm_info_node *) m->private;
 213         struct drm_device *dev = node->minor->dev;
 214         struct etnaviv_drm_private *priv = dev->dev_private;
 215         struct etnaviv_gpu *gpu;
 216         int (*show)(struct etnaviv_gpu *gpu, struct seq_file *m) =
 217                         node->info_ent->data;
 218         unsigned int i;
 219         int ret = 0;
 220
 221         for (i = 0; i < ETNA_MAX_PIPES; i++) {
 222                 gpu = priv->gpu[i];
 223                 if (!gpu)
 224                         continue;
 225
 226                 ret = show(gpu, m);
 227                 if (ret < 0)
 228                         break;
 229         }
 230
 231         return ret;
 232 }
 233
 234 static struct drm_info_list etnaviv_debugfs_list[] = {
 235                 {"gpu", show_each_gpu, 0, etnaviv_gpu_debugfs},
 236                 {"gem", show_unlocked, 0, etnaviv_gem_show},
 237                 { "mm", show_unlocked, 0, etnaviv_mm_show },
 238                 {"mmu", show_each_gpu, 0, etnaviv_mmu_show},
 239                 {"ring", show_each_gpu, 0, etnaviv_ring_show},
 240 };
 241
 242 static int etnaviv_debugfs_init(struct drm_minor *minor)
 243 {
 244         struct drm_device *dev = minor->dev;
 245         int ret;
 246
 247         ret = drm_debugfs_create_files(etnaviv_debugfs_list,
 248                         ARRAY_SIZE(etnaviv_debugfs_list),
 249                         minor->debugfs_root, minor);
 250
 251         if (ret) {
 252                 dev_err(dev->dev, "could not install etnaviv_debugfs_list\n");
 253                 return ret;
 254         }
 255
 256         return ret;
 257 }
 258
 259 static void etnaviv_debugfs_cleanup(struct drm_minor *minor)
 260 {
 261         drm_debugfs_remove_files(etnaviv_debugfs_list,
 262                         ARRAY_SIZE(etnaviv_debugfs_list), minor);
 263 }
 264 #endif
 265
 266 /*
 267  * DRM ioctls:
 268  */
 269
 270 static int etnaviv_ioctl_get_param(struct drm_device *dev, void *data,
 271                 struct drm_file *file)
 272 {
 273         struct etnaviv_drm_private *priv = dev->dev_private;
 274         struct drm_etnaviv_param *args = data;
 275         struct etnaviv_gpu *gpu;
 276
 277         if (args->pipe >= ETNA_MAX_PIPES)
 278                 return -EINVAL;
 279
 280         gpu = priv->gpu[args->pipe];
 281         if (!gpu)
 282                 return -ENXIO;
 283
 284         return etnaviv_gpu_get_param(gpu, args->param, &args->value);
 285 }
 286
 287 static int etnaviv_ioctl_gem_new(struct drm_device *dev, void *data,
 288                 struct drm_file *file)
 289 {
 290         struct drm_etnaviv_gem_new *args = data;
 291
 292         if (args->flags & ~(ETNA_BO_CACHED | ETNA_BO_WC | ETNA_BO_UNCACHED |
 293                             ETNA_BO_FORCE_MMU))
 294                 return -EINVAL;
 295
 296         return etnaviv_gem_new_handle(dev, file, args->size,
 297                         args->flags, &args->handle);
 298 }
 299
 300 #define TS(t) ((struct timespec){ \
 301         .tv_sec = (t).tv_sec, \
 302         .tv_nsec = (t).tv_nsec \
 303 })
 304
 305 static int etnaviv_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 306                 struct drm_file *file)
 307 {
 308         struct drm_etnaviv_gem_cpu_prep *args = data;
 309         struct drm_gem_object *obj;
 310         int ret;
 311
 312         if (args->op & ~(ETNA_PREP_READ | ETNA_PREP_WRITE | ETNA_PREP_NOSYNC))
 313                 return -EINVAL;
 314
 315         obj = drm_gem_object_lookup(file, args->handle);
 316         if (!obj)
 317                 return -ENOENT;
 318
 319         ret = etnaviv_gem_cpu_prep(obj, args->op, &TS(args->timeout));
 320
 321         drm_gem_object_unreference_unlocked(obj);
 322
 323         return ret;
 324 }
 325
 326 static int etnaviv_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 327                 struct drm_file *file)
 328 {
 329         struct drm_etnaviv_gem_cpu_fini *args = data;
 330         struct drm_gem_object *obj;
 331         int ret;
 332
 333         if (args->flags)
 334                 return -EINVAL;
 335
 336         obj = drm_gem_object_lookup(file, args->handle);
 337         if (!obj)
 338                 return -ENOENT;
 339
 340         ret = etnaviv_gem_cpu_fini(obj);
 341
 342         drm_gem_object_unreference_unlocked(obj);
 343
 344         return ret;
 345 }
 346
 347 static int etnaviv_ioctl_gem_info(struct drm_device *dev, void *data,
 348                 struct drm_file *file)
 349 {
 350         struct drm_etnaviv_gem_info *args = data;
 351         struct drm_gem_object *obj;
 352         int ret;
 353
 354         if (args->pad)
 355                 return -EINVAL;
 356
 357         obj = drm_gem_object_lookup(file, args->handle);
 358         if (!obj)
 359                 return -ENOENT;
 360
 361         ret = etnaviv_gem_mmap_offset(obj, &args->offset);
 362         drm_gem_object_unreference_unlocked(obj);
 363
 364         return ret;
 365 }
 366
 367 static int etnaviv_ioctl_wait_fence(struct drm_device *dev, void *data,
 368                 struct drm_file *file)
 369 {
 370         struct drm_etnaviv_wait_fence *args = data;
 371         struct etnaviv_drm_private *priv = dev->dev_private;
 372         struct timespec *timeout = &TS(args->timeout);
 373         struct etnaviv_gpu *gpu;
 374
 375         if (args->flags & ~(ETNA_WAIT_NONBLOCK))
 376                 return -EINVAL;
 377
 378         if (args->pipe >= ETNA_MAX_PIPES)
 379                 return -EINVAL;
 380
 381         gpu = priv->gpu[args->pipe];
 382         if (!gpu)
 383                 return -ENXIO;
 384
 385         if (args->flags & ETNA_WAIT_NONBLOCK)
 386                 timeout = NULL;
 387
 388         return etnaviv_gpu_wait_fence_interruptible(gpu, args->fence,
 389                                                     timeout);
 390 }
 391
 392 static int etnaviv_ioctl_gem_userptr(struct drm_device *dev, void *data,
 393         struct drm_file *file)
 394 {
 395         struct drm_etnaviv_gem_userptr *args = data;
 396         int access;
 397
 398         if (args->flags & ~(ETNA_USERPTR_READ|ETNA_USERPTR_WRITE) ||
 399             args->flags == 0)
 400                 return -EINVAL;
 401
 402         if (offset_in_page(args->user_ptr | args->user_size) ||
 403             (uintptr_t)args->user_ptr != args->user_ptr ||
 404             (u32)args->user_size != args->user_size ||
 405             args->user_ptr & ~PAGE_MASK)
 406                 return -EINVAL;
 407
 408         if (args->flags & ETNA_USERPTR_WRITE)
 409                 access = VERIFY_WRITE;
 410         else
 411                 access = VERIFY_READ;
 412
 413         if (!access_ok(access, (void __user *)(unsigned long)args->user_ptr,
 414                        args->user_size))
 415                 return -EFAULT;
 416
 417         return etnaviv_gem_new_userptr(dev, file, args->user_ptr,
 418                                        args->user_size, args->flags,
 419                                        &args->handle);
 420 }
 421
 422 static int etnaviv_ioctl_gem_wait(struct drm_device *dev, void *data,
 423         struct drm_file *file)
 424 {
 425         struct etnaviv_drm_private *priv = dev->dev_private;
 426         struct drm_etnaviv_gem_wait *args = data;
 427         struct timespec *timeout = &TS(args->timeout);
 428         struct drm_gem_object *obj;
 429         struct etnaviv_gpu *gpu;
 430         int ret;
 431
 432         if (args->flags & ~(ETNA_WAIT_NONBLOCK))
 433                 return -EINVAL;
 434
 435         if (args->pipe >= ETNA_MAX_PIPES)
 436                 return -EINVAL;
 437
 438         gpu = priv->gpu[args->pipe];
 439         if (!gpu)
 440                 return -ENXIO;
 441
 442         obj = drm_gem_object_lookup(file, args->handle);
 443         if (!obj)
 444                 return -ENOENT;
 445
 446         if (args->flags & ETNA_WAIT_NONBLOCK)
 447                 timeout = NULL;
 448
 449         ret = etnaviv_gem_wait_bo(gpu, obj, timeout);
 450
 451         drm_gem_object_unreference_unlocked(obj);
 452
 453         return ret;
 454 }
 455
 456 static const struct drm_ioctl_desc etnaviv_ioctls[] = {
 457 #define ETNA_IOCTL(n, func, flags) \
 458         DRM_IOCTL_DEF_DRV(ETNAVIV_##n, etnaviv_ioctl_##func, flags)
 459         ETNA_IOCTL(GET_PARAM,    get_param,    DRM_AUTH|DRM_RENDER_ALLOW),
 460         ETNA_IOCTL(GEM_NEW,      gem_new,      DRM_AUTH|DRM_RENDER_ALLOW),
 461         ETNA_IOCTL(GEM_INFO,     gem_info,     DRM_AUTH|DRM_RENDER_ALLOW),
 462         ETNA_IOCTL(GEM_CPU_PREP, gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
 463         ETNA_IOCTL(GEM_CPU_FINI, gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
 464         ETNA_IOCTL(GEM_SUBMIT,   gem_submit,   DRM_AUTH|DRM_RENDER_ALLOW),
 465         ETNA_IOCTL(WAIT_FENCE,   wait_fence,   DRM_AUTH|DRM_RENDER_ALLOW),
 466         ETNA_IOCTL(GEM_USERPTR,  gem_userptr,  DRM_AUTH|DRM_RENDER_ALLOW),
 467         ETNA_IOCTL(GEM_WAIT,     gem_wait,     DRM_AUTH|DRM_RENDER_ALLOW),
 468 };
 469
 470 static const struct vm_operations_struct vm_ops = {
 471         .fault = etnaviv_gem_fault,
 472         .open = drm_gem_vm_open,
 473         .close = drm_gem_vm_close,
 474 };
 475
 476 static const struct file_operations fops = {
 477         .owner              = THIS_MODULE,
 478         .open               = drm_open,
 479         .release            = drm_release,
 480         .unlocked_ioctl     = drm_ioctl,
 481 #ifdef CONFIG_COMPAT
 482         .compat_ioctl       = drm_compat_ioctl,
 483 #endif
 484         .poll               = drm_poll,
 485         .read               = drm_read,
 486         .llseek             = no_llseek,
 487         .mmap               = etnaviv_gem_mmap,
 488 };
 489
 490 static struct drm_driver etnaviv_drm_driver = {
 491         .driver_features    = DRIVER_GEM |
 492                                 DRIVER_PRIME |
 493                                 DRIVER_RENDER,
 494         .open               = etnaviv_open,
 495         .preclose           = etnaviv_preclose,
 496         .gem_free_object_unlocked = etnaviv_gem_free_object,
 497         .gem_vm_ops         = &vm_ops,
 498         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 499         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 500         .gem_prime_export   = drm_gem_prime_export,
 501         .gem_prime_import   = drm_gem_prime_import,
 502         .gem_prime_pin      = etnaviv_gem_prime_pin,
 503         .gem_prime_unpin    = etnaviv_gem_prime_unpin,
 504         .gem_prime_get_sg_table = etnaviv_gem_prime_get_sg_table,
 505         .gem_prime_import_sg_table = etnaviv_gem_prime_import_sg_table,
 506         .gem_prime_vmap     = etnaviv_gem_prime_vmap,
 507         .gem_prime_vunmap   = etnaviv_gem_prime_vunmap,
 508 #ifdef CONFIG_DEBUG_FS
 509         .debugfs_init       = etnaviv_debugfs_init,
 510         .debugfs_cleanup    = etnaviv_debugfs_cleanup,
 511 #endif
 512         .ioctls             = etnaviv_ioctls,
 513         .num_ioctls         = DRM_ETNAVIV_NUM_IOCTLS,
 514         .fops               = &fops,
 515         .name               = "etnaviv",
 516         .desc               = "etnaviv DRM",
 517         .date               = "20151214",
 518         .major              = 1,
 519         .minor              = 0,
 520 };
 521
 522 /*
 523  * Platform driver:
 524  */
 525 static int etnaviv_bind(struct device *dev)
 526 {
 527         struct etnaviv_drm_private *priv;
 528         struct drm_device *drm;
 529         int ret;
 530
 531         drm = drm_dev_alloc(&etnaviv_drm_driver, dev);
 532         if (!drm)
 533                 return -ENOMEM;
 534
 535         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 536         if (!priv) {
 537                 dev_err(dev, "failed to allocate private data\n");
 538                 ret = -ENOMEM;
 539                 goto out_unref;
 540         }
 541         drm->dev_private = priv;
 542
 543         priv->wq = alloc_ordered_workqueue("etnaviv", 0);
 544         if (!priv->wq) {
 545                 ret = -ENOMEM;
 546                 goto out_wq;
 547         }
 548
 549         mutex_init(&priv->gem_lock);
 550         INIT_LIST_HEAD(&priv->gem_list);
 551         priv->num_gpus = 0;
 552
 553         dev_set_drvdata(dev, drm);
 554
 555         ret = component_bind_all(dev, drm);
 556         if (ret < 0)
 557                 goto out_bind;
 558
 559         load_gpu(drm);
 560
 561         ret = drm_dev_register(drm, 0);
 562         if (ret)
 563                 goto out_register;
 564
 565         return 0;
 566
 567 out_register:
 568         component_unbind_all(dev, drm);
 569 out_bind:
 570         flush_workqueue(priv->wq);
 571         destroy_workqueue(priv->wq);
 572 out_wq:
 573         kfree(priv);
 574 out_unref:
 575         drm_dev_unref(drm);
 576
 577         return ret;
 578 }
 579
 580 static void etnaviv_unbind(struct device *dev)
 581 {
 582         struct drm_device *drm = dev_get_drvdata(dev);
 583         struct etnaviv_drm_private *priv = drm->dev_private;
 584
 585         drm_dev_unregister(drm);
 586
 587         flush_workqueue(priv->wq);
 588         destroy_workqueue(priv->wq);
 589
 590         component_unbind_all(dev, drm);
 591
 592         drm->dev_private = NULL;
 593         kfree(priv);
 594
 595         drm_put_dev(drm);
 596 }
 597
 598 static const struct component_master_ops etnaviv_master_ops = {
 599         .bind = etnaviv_bind,
 600         .unbind = etnaviv_unbind,
 601 };
 602
 603 static int compare_of(struct device *dev, void *data)
 604 {
 605         struct device_node *np = data;
 606
 607         return dev->of_node == np;
 608 }
 609
 610 static int compare_str(struct device *dev, void *data)
 611 {
 612         return !strcmp(dev_name(dev), data);
 613 }
 614
 615 static int etnaviv_pdev_probe(struct platform_device *pdev)
 616 {
 617         struct device *dev = &pdev->dev;
 618         struct device_node *node = dev->of_node;
 619         struct component_match *match = NULL;
 620
 621         dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 622
 623         if (node) {
 624                 struct device_node *core_node;
 625                 int i;
 626
 627                 for (i = 0; ; i++) {
 628                         core_node = of_parse_phandle(node, "cores", i);
 629                         if (!core_node)
 630                                 break;
 631
 632                         component_match_add(&pdev->dev, &match, compare_of,
 633                                             core_node);
 634                         of_node_put(core_node);
 635                 }
 636         } else if (dev->platform_data) {
 637                 char **names = dev->platform_data;
 638                 unsigned i;
 639
 640                 for (i = 0; names[i]; i++)
 641                         component_match_add(dev, &match, compare_str, names[i]);
 642         }
 643
 644         return component_master_add_with_match(dev, &etnaviv_master_ops, match);
 645 }
 646
 647 static int etnaviv_pdev_remove(struct platform_device *pdev)
 648 {
 649         component_master_del(&pdev->dev, &etnaviv_master_ops);
 650
 651         return 0;
 652 }
 653
 654 static const struct of_device_id dt_match[] = {
 655         { .compatible = "fsl,imx-gpu-subsystem" },
 656         { .compatible = "marvell,dove-gpu-subsystem" },
 657         {}
 658 };
 659 MODULE_DEVICE_TABLE(of, dt_match);
 660
 661 static struct platform_driver etnaviv_platform_driver = {
 662         .probe      = etnaviv_pdev_probe,
 663         .remove     = etnaviv_pdev_remove,
 664         .driver     = {
 665                 .name   = "etnaviv",
 666                 .of_match_table = dt_match,
 667         },
 668 };
 669
 670 static int __init etnaviv_init(void)
 671 {
 672         int ret;
 673
 674         etnaviv_validate_init();
 675
 676         ret = platform_driver_register(&etnaviv_gpu_driver);
 677         if (ret != 0)
 678                 return ret;
 679
 680         ret = platform_driver_register(&etnaviv_platform_driver);
 681         if (ret != 0)
 682                 platform_driver_unregister(&etnaviv_gpu_driver);
 683
 684         return ret;
 685 }
 686 module_init(etnaviv_init);
 687
 688 static void __exit etnaviv_exit(void)
 689 {
 690         platform_driver_unregister(&etnaviv_gpu_driver);
 691         platform_driver_unregister(&etnaviv_platform_driver);
 692 }
 693 module_exit(etnaviv_exit);
 694
 695 MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
 696 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
 697 MODULE_AUTHOR("Lucas Stach <l.stach@pengutronix.de>");
 698 MODULE_DESCRIPTION("etnaviv DRM Driver");
 699 MODULE_LICENSE("GPL v2");
 700 MODULE_ALIAS("platform:etnaviv");