drm.c 15 KB

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  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. #include <linux/module.h>
  10. #include <linux/of_address.h>
  11. #include <linux/of_platform.h>
  12. #include <linux/dma-mapping.h>
  13. #include <asm/dma-iommu.h>
  14. #include <drm/drm.h>
  15. #include <drm/drmP.h>
  16. #include "host1x_client.h"
  17. #include "dev.h"
  18. #include "drm.h"
  19. #include "gem.h"
  20. #include "syncpt.h"
  21. #define DRIVER_NAME "tegra"
  22. #define DRIVER_DESC "NVIDIA Tegra graphics"
  23. #define DRIVER_DATE "20120330"
  24. #define DRIVER_MAJOR 0
  25. #define DRIVER_MINOR 0
  26. #define DRIVER_PATCHLEVEL 0
  27. struct host1x_drm_client {
  28. struct host1x_client *client;
  29. struct device_node *np;
  30. struct list_head list;
  31. };
  32. static int host1x_add_drm_client(struct host1x_drm *host1x,
  33. struct device_node *np)
  34. {
  35. struct host1x_drm_client *client;
  36. client = kzalloc(sizeof(*client), GFP_KERNEL);
  37. if (!client)
  38. return -ENOMEM;
  39. INIT_LIST_HEAD(&client->list);
  40. client->np = of_node_get(np);
  41. list_add_tail(&client->list, &host1x->drm_clients);
  42. return 0;
  43. }
  44. static int host1x_activate_drm_client(struct host1x_drm *host1x,
  45. struct host1x_drm_client *drm,
  46. struct host1x_client *client)
  47. {
  48. mutex_lock(&host1x->drm_clients_lock);
  49. list_del_init(&drm->list);
  50. list_add_tail(&drm->list, &host1x->drm_active);
  51. drm->client = client;
  52. mutex_unlock(&host1x->drm_clients_lock);
  53. return 0;
  54. }
  55. static int host1x_remove_drm_client(struct host1x_drm *host1x,
  56. struct host1x_drm_client *client)
  57. {
  58. mutex_lock(&host1x->drm_clients_lock);
  59. list_del_init(&client->list);
  60. mutex_unlock(&host1x->drm_clients_lock);
  61. of_node_put(client->np);
  62. kfree(client);
  63. return 0;
  64. }
  65. static int host1x_parse_dt(struct host1x_drm *host1x)
  66. {
  67. static const char * const compat[] = {
  68. "nvidia,tegra20-dc",
  69. "nvidia,tegra20-hdmi",
  70. "nvidia,tegra20-gr2d",
  71. "nvidia,tegra30-dc",
  72. "nvidia,tegra30-hdmi",
  73. "nvidia,tegra30-gr2d",
  74. };
  75. unsigned int i;
  76. int err;
  77. for (i = 0; i < ARRAY_SIZE(compat); i++) {
  78. struct device_node *np;
  79. for_each_child_of_node(host1x->dev->of_node, np) {
  80. if (of_device_is_compatible(np, compat[i]) &&
  81. of_device_is_available(np)) {
  82. err = host1x_add_drm_client(host1x, np);
  83. if (err < 0)
  84. return err;
  85. }
  86. }
  87. }
  88. return 0;
  89. }
  90. int host1x_drm_alloc(struct platform_device *pdev)
  91. {
  92. struct host1x_drm *host1x;
  93. int err;
  94. host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
  95. if (!host1x)
  96. return -ENOMEM;
  97. mutex_init(&host1x->drm_clients_lock);
  98. INIT_LIST_HEAD(&host1x->drm_clients);
  99. INIT_LIST_HEAD(&host1x->drm_active);
  100. mutex_init(&host1x->clients_lock);
  101. INIT_LIST_HEAD(&host1x->clients);
  102. host1x->dev = &pdev->dev;
  103. err = host1x_parse_dt(host1x);
  104. if (err < 0) {
  105. dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
  106. return err;
  107. }
  108. host1x_set_drm_data(&pdev->dev, host1x);
  109. return 0;
  110. }
  111. int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
  112. {
  113. struct host1x_client *client;
  114. mutex_lock(&host1x->clients_lock);
  115. list_for_each_entry(client, &host1x->clients, list) {
  116. if (client->ops && client->ops->drm_init) {
  117. int err = client->ops->drm_init(client, drm);
  118. if (err < 0) {
  119. dev_err(host1x->dev,
  120. "DRM setup failed for %s: %d\n",
  121. dev_name(client->dev), err);
  122. mutex_unlock(&host1x->clients_lock);
  123. return err;
  124. }
  125. }
  126. }
  127. mutex_unlock(&host1x->clients_lock);
  128. return 0;
  129. }
  130. int host1x_drm_exit(struct host1x_drm *host1x)
  131. {
  132. struct platform_device *pdev = to_platform_device(host1x->dev);
  133. struct host1x_client *client;
  134. if (!host1x->drm)
  135. return 0;
  136. mutex_lock(&host1x->clients_lock);
  137. list_for_each_entry_reverse(client, &host1x->clients, list) {
  138. if (client->ops && client->ops->drm_exit) {
  139. int err = client->ops->drm_exit(client);
  140. if (err < 0) {
  141. dev_err(host1x->dev,
  142. "DRM cleanup failed for %s: %d\n",
  143. dev_name(client->dev), err);
  144. mutex_unlock(&host1x->clients_lock);
  145. return err;
  146. }
  147. }
  148. }
  149. mutex_unlock(&host1x->clients_lock);
  150. drm_platform_exit(&tegra_drm_driver, pdev);
  151. host1x->drm = NULL;
  152. return 0;
  153. }
  154. int host1x_register_client(struct host1x_drm *host1x,
  155. struct host1x_client *client)
  156. {
  157. struct host1x_drm_client *drm, *tmp;
  158. int err;
  159. mutex_lock(&host1x->clients_lock);
  160. list_add_tail(&client->list, &host1x->clients);
  161. mutex_unlock(&host1x->clients_lock);
  162. list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
  163. if (drm->np == client->dev->of_node)
  164. host1x_activate_drm_client(host1x, drm, client);
  165. if (list_empty(&host1x->drm_clients)) {
  166. struct platform_device *pdev = to_platform_device(host1x->dev);
  167. err = drm_platform_init(&tegra_drm_driver, pdev);
  168. if (err < 0) {
  169. dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
  170. return err;
  171. }
  172. }
  173. return 0;
  174. }
  175. int host1x_unregister_client(struct host1x_drm *host1x,
  176. struct host1x_client *client)
  177. {
  178. struct host1x_drm_client *drm, *tmp;
  179. int err;
  180. list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
  181. if (drm->client == client) {
  182. err = host1x_drm_exit(host1x);
  183. if (err < 0) {
  184. dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
  185. err);
  186. return err;
  187. }
  188. host1x_remove_drm_client(host1x, drm);
  189. break;
  190. }
  191. }
  192. mutex_lock(&host1x->clients_lock);
  193. list_del_init(&client->list);
  194. mutex_unlock(&host1x->clients_lock);
  195. return 0;
  196. }
  197. static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
  198. {
  199. struct host1x_drm *host1x;
  200. int err;
  201. host1x = host1x_get_drm_data(drm->dev);
  202. drm->dev_private = host1x;
  203. host1x->drm = drm;
  204. drm_mode_config_init(drm);
  205. err = host1x_drm_init(host1x, drm);
  206. if (err < 0)
  207. return err;
  208. /*
  209. * We don't use the drm_irq_install() helpers provided by the DRM
  210. * core, so we need to set this manually in order to allow the
  211. * DRM_IOCTL_WAIT_VBLANK to operate correctly.
  212. */
  213. drm->irq_enabled = 1;
  214. err = drm_vblank_init(drm, drm->mode_config.num_crtc);
  215. if (err < 0)
  216. return err;
  217. err = tegra_drm_fb_init(drm);
  218. if (err < 0)
  219. return err;
  220. drm_kms_helper_poll_init(drm);
  221. return 0;
  222. }
  223. static int tegra_drm_unload(struct drm_device *drm)
  224. {
  225. drm_kms_helper_poll_fini(drm);
  226. tegra_drm_fb_exit(drm);
  227. drm_mode_config_cleanup(drm);
  228. return 0;
  229. }
  230. static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
  231. {
  232. struct host1x_drm_file *fpriv;
  233. fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
  234. if (!fpriv)
  235. return -ENOMEM;
  236. INIT_LIST_HEAD(&fpriv->contexts);
  237. filp->driver_priv = fpriv;
  238. return 0;
  239. }
  240. static void host1x_drm_context_free(struct host1x_drm_context *context)
  241. {
  242. context->client->ops->close_channel(context);
  243. kfree(context);
  244. }
  245. static void tegra_drm_lastclose(struct drm_device *drm)
  246. {
  247. struct host1x_drm *host1x = drm->dev_private;
  248. tegra_fbdev_restore_mode(host1x->fbdev);
  249. }
  250. #ifdef CONFIG_DRM_TEGRA_STAGING
  251. static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
  252. struct host1x_drm_context *context)
  253. {
  254. struct host1x_drm_context *ctx;
  255. list_for_each_entry(ctx, &file->contexts, list)
  256. if (ctx == context)
  257. return true;
  258. return false;
  259. }
  260. static int tegra_gem_create(struct drm_device *drm, void *data,
  261. struct drm_file *file)
  262. {
  263. struct drm_tegra_gem_create *args = data;
  264. struct tegra_bo *bo;
  265. bo = tegra_bo_create_with_handle(file, drm, args->size,
  266. &args->handle);
  267. if (IS_ERR(bo))
  268. return PTR_ERR(bo);
  269. return 0;
  270. }
  271. static int tegra_gem_mmap(struct drm_device *drm, void *data,
  272. struct drm_file *file)
  273. {
  274. struct drm_tegra_gem_mmap *args = data;
  275. struct drm_gem_object *gem;
  276. struct tegra_bo *bo;
  277. gem = drm_gem_object_lookup(drm, file, args->handle);
  278. if (!gem)
  279. return -EINVAL;
  280. bo = to_tegra_bo(gem);
  281. args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
  282. drm_gem_object_unreference(gem);
  283. return 0;
  284. }
  285. static int tegra_syncpt_read(struct drm_device *drm, void *data,
  286. struct drm_file *file)
  287. {
  288. struct drm_tegra_syncpt_read *args = data;
  289. struct host1x *host = dev_get_drvdata(drm->dev);
  290. struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
  291. if (!sp)
  292. return -EINVAL;
  293. args->value = host1x_syncpt_read_min(sp);
  294. return 0;
  295. }
  296. static int tegra_syncpt_incr(struct drm_device *drm, void *data,
  297. struct drm_file *file)
  298. {
  299. struct drm_tegra_syncpt_incr *args = data;
  300. struct host1x *host = dev_get_drvdata(drm->dev);
  301. struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
  302. if (!sp)
  303. return -EINVAL;
  304. return host1x_syncpt_incr(sp);
  305. }
  306. static int tegra_syncpt_wait(struct drm_device *drm, void *data,
  307. struct drm_file *file)
  308. {
  309. struct drm_tegra_syncpt_wait *args = data;
  310. struct host1x *host = dev_get_drvdata(drm->dev);
  311. struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
  312. if (!sp)
  313. return -EINVAL;
  314. return host1x_syncpt_wait(sp, args->thresh, args->timeout,
  315. &args->value);
  316. }
  317. static int tegra_open_channel(struct drm_device *drm, void *data,
  318. struct drm_file *file)
  319. {
  320. struct drm_tegra_open_channel *args = data;
  321. struct host1x_client *client;
  322. struct host1x_drm_context *context;
  323. struct host1x_drm_file *fpriv = file->driver_priv;
  324. struct host1x_drm *host1x = drm->dev_private;
  325. int err = -ENODEV;
  326. context = kzalloc(sizeof(*context), GFP_KERNEL);
  327. if (!context)
  328. return -ENOMEM;
  329. list_for_each_entry(client, &host1x->clients, list)
  330. if (client->class == args->client) {
  331. err = client->ops->open_channel(client, context);
  332. if (err)
  333. break;
  334. context->client = client;
  335. list_add(&context->list, &fpriv->contexts);
  336. args->context = (uintptr_t)context;
  337. return 0;
  338. }
  339. kfree(context);
  340. return err;
  341. }
  342. static int tegra_close_channel(struct drm_device *drm, void *data,
  343. struct drm_file *file)
  344. {
  345. struct drm_tegra_close_channel *args = data;
  346. struct host1x_drm_file *fpriv = file->driver_priv;
  347. struct host1x_drm_context *context =
  348. (struct host1x_drm_context *)(uintptr_t)args->context;
  349. if (!host1x_drm_file_owns_context(fpriv, context))
  350. return -EINVAL;
  351. list_del(&context->list);
  352. host1x_drm_context_free(context);
  353. return 0;
  354. }
  355. static int tegra_get_syncpt(struct drm_device *drm, void *data,
  356. struct drm_file *file)
  357. {
  358. struct drm_tegra_get_syncpt *args = data;
  359. struct host1x_drm_file *fpriv = file->driver_priv;
  360. struct host1x_drm_context *context =
  361. (struct host1x_drm_context *)(uintptr_t)args->context;
  362. struct host1x_syncpt *syncpt;
  363. if (!host1x_drm_file_owns_context(fpriv, context))
  364. return -ENODEV;
  365. if (args->index >= context->client->num_syncpts)
  366. return -EINVAL;
  367. syncpt = context->client->syncpts[args->index];
  368. args->id = host1x_syncpt_id(syncpt);
  369. return 0;
  370. }
  371. static int tegra_submit(struct drm_device *drm, void *data,
  372. struct drm_file *file)
  373. {
  374. struct drm_tegra_submit *args = data;
  375. struct host1x_drm_file *fpriv = file->driver_priv;
  376. struct host1x_drm_context *context =
  377. (struct host1x_drm_context *)(uintptr_t)args->context;
  378. if (!host1x_drm_file_owns_context(fpriv, context))
  379. return -ENODEV;
  380. return context->client->ops->submit(context, args, drm, file);
  381. }
  382. #endif
  383. static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
  384. #ifdef CONFIG_DRM_TEGRA_STAGING
  385. DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
  386. DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
  387. DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
  388. DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
  389. DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
  390. DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
  391. DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
  392. DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
  393. DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
  394. #endif
  395. };
  396. static const struct file_operations tegra_drm_fops = {
  397. .owner = THIS_MODULE,
  398. .open = drm_open,
  399. .release = drm_release,
  400. .unlocked_ioctl = drm_ioctl,
  401. .mmap = tegra_drm_mmap,
  402. .poll = drm_poll,
  403. .read = drm_read,
  404. #ifdef CONFIG_COMPAT
  405. .compat_ioctl = drm_compat_ioctl,
  406. #endif
  407. .llseek = noop_llseek,
  408. };
  409. static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
  410. {
  411. struct drm_crtc *crtc;
  412. list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
  413. struct tegra_dc *dc = to_tegra_dc(crtc);
  414. if (dc->pipe == pipe)
  415. return crtc;
  416. }
  417. return NULL;
  418. }
  419. static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
  420. {
  421. /* TODO: implement real hardware counter using syncpoints */
  422. return drm_vblank_count(dev, crtc);
  423. }
  424. static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
  425. {
  426. struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
  427. struct tegra_dc *dc = to_tegra_dc(crtc);
  428. if (!crtc)
  429. return -ENODEV;
  430. tegra_dc_enable_vblank(dc);
  431. return 0;
  432. }
  433. static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
  434. {
  435. struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
  436. struct tegra_dc *dc = to_tegra_dc(crtc);
  437. if (crtc)
  438. tegra_dc_disable_vblank(dc);
  439. }
  440. static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
  441. {
  442. struct host1x_drm_file *fpriv = file->driver_priv;
  443. struct host1x_drm_context *context, *tmp;
  444. struct drm_crtc *crtc;
  445. list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
  446. tegra_dc_cancel_page_flip(crtc, file);
  447. list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
  448. host1x_drm_context_free(context);
  449. kfree(fpriv);
  450. }
  451. #ifdef CONFIG_DEBUG_FS
  452. static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
  453. {
  454. struct drm_info_node *node = (struct drm_info_node *)s->private;
  455. struct drm_device *drm = node->minor->dev;
  456. struct drm_framebuffer *fb;
  457. mutex_lock(&drm->mode_config.fb_lock);
  458. list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
  459. seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
  460. fb->base.id, fb->width, fb->height, fb->depth,
  461. fb->bits_per_pixel,
  462. atomic_read(&fb->refcount.refcount));
  463. }
  464. mutex_unlock(&drm->mode_config.fb_lock);
  465. return 0;
  466. }
  467. static struct drm_info_list tegra_debugfs_list[] = {
  468. { "framebuffers", tegra_debugfs_framebuffers, 0 },
  469. };
  470. static int tegra_debugfs_init(struct drm_minor *minor)
  471. {
  472. return drm_debugfs_create_files(tegra_debugfs_list,
  473. ARRAY_SIZE(tegra_debugfs_list),
  474. minor->debugfs_root, minor);
  475. }
  476. static void tegra_debugfs_cleanup(struct drm_minor *minor)
  477. {
  478. drm_debugfs_remove_files(tegra_debugfs_list,
  479. ARRAY_SIZE(tegra_debugfs_list), minor);
  480. }
  481. #endif
  482. struct drm_driver tegra_drm_driver = {
  483. .driver_features = DRIVER_MODESET | DRIVER_GEM,
  484. .load = tegra_drm_load,
  485. .unload = tegra_drm_unload,
  486. .open = tegra_drm_open,
  487. .preclose = tegra_drm_preclose,
  488. .lastclose = tegra_drm_lastclose,
  489. .get_vblank_counter = tegra_drm_get_vblank_counter,
  490. .enable_vblank = tegra_drm_enable_vblank,
  491. .disable_vblank = tegra_drm_disable_vblank,
  492. #if defined(CONFIG_DEBUG_FS)
  493. .debugfs_init = tegra_debugfs_init,
  494. .debugfs_cleanup = tegra_debugfs_cleanup,
  495. #endif
  496. .gem_free_object = tegra_bo_free_object,
  497. .gem_vm_ops = &tegra_bo_vm_ops,
  498. .dumb_create = tegra_bo_dumb_create,
  499. .dumb_map_offset = tegra_bo_dumb_map_offset,
  500. .dumb_destroy = drm_gem_dumb_destroy,
  501. .ioctls = tegra_drm_ioctls,
  502. .num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
  503. .fops = &tegra_drm_fops,
  504. .name = DRIVER_NAME,
  505. .desc = DRIVER_DESC,
  506. .date = DRIVER_DATE,
  507. .major = DRIVER_MAJOR,
  508. .minor = DRIVER_MINOR,
  509. .patchlevel = DRIVER_PATCHLEVEL,
  510. };