vc4_drv.c 10 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (C) 2014-2015 Broadcom
  4. * Copyright (C) 2013 Red Hat
  5. */
  6. /**
  7. * DOC: Broadcom VC4 Graphics Driver
  8. *
  9. * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
  10. * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
  11. * configurable display output pipeline that supports HDMI, DSI, DPI,
  12. * and Composite TV output.
  13. *
  14. * The 3D engine also has an interface for submitting arbitrary
  15. * compute shader-style jobs using the same shader processor as is
  16. * used for vertex and fragment shaders in GLES 2.0. However, given
  17. * that the hardware isn't able to expose any standard interfaces like
  18. * OpenGL compute shaders or OpenCL, it isn't supported by this
  19. * driver.
  20. */
  21. #include <linux/clk.h>
  22. #include <linux/component.h>
  23. #include <linux/device.h>
  24. #include <linux/dma-mapping.h>
  25. #include <linux/io.h>
  26. #include <linux/module.h>
  27. #include <linux/of_platform.h>
  28. #include <linux/platform_device.h>
  29. #include <linux/pm_runtime.h>
  30. #include <drm/drm_atomic_helper.h>
  31. #include <drm/drm_drv.h>
  32. #include <drm/drm_fb_cma_helper.h>
  33. #include <drm/drm_fb_helper.h>
  34. #include <drm/drm_vblank.h>
  35. #include "uapi/drm/vc4_drm.h"
  36. #include "vc4_drv.h"
  37. #include "vc4_regs.h"
  38. #define DRIVER_NAME "vc4"
  39. #define DRIVER_DESC "Broadcom VC4 graphics"
  40. #define DRIVER_DATE "20140616"
  41. #define DRIVER_MAJOR 0
  42. #define DRIVER_MINOR 0
  43. #define DRIVER_PATCHLEVEL 0
  44. /* Helper function for mapping the regs on a platform device. */
  45. void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  46. {
  47. struct resource *res;
  48. void __iomem *map;
  49. res = platform_get_resource(dev, IORESOURCE_MEM, index);
  50. map = devm_ioremap_resource(&dev->dev, res);
  51. if (IS_ERR(map)) {
  52. DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  53. return map;
  54. }
  55. return map;
  56. }
  57. static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  58. struct drm_file *file_priv)
  59. {
  60. struct vc4_dev *vc4 = to_vc4_dev(dev);
  61. struct drm_vc4_get_param *args = data;
  62. int ret;
  63. if (args->pad != 0)
  64. return -EINVAL;
  65. if (!vc4->v3d)
  66. return -ENODEV;
  67. switch (args->param) {
  68. case DRM_VC4_PARAM_V3D_IDENT0:
  69. ret = vc4_v3d_pm_get(vc4);
  70. if (ret)
  71. return ret;
  72. args->value = V3D_READ(V3D_IDENT0);
  73. vc4_v3d_pm_put(vc4);
  74. break;
  75. case DRM_VC4_PARAM_V3D_IDENT1:
  76. ret = vc4_v3d_pm_get(vc4);
  77. if (ret)
  78. return ret;
  79. args->value = V3D_READ(V3D_IDENT1);
  80. vc4_v3d_pm_put(vc4);
  81. break;
  82. case DRM_VC4_PARAM_V3D_IDENT2:
  83. ret = vc4_v3d_pm_get(vc4);
  84. if (ret)
  85. return ret;
  86. args->value = V3D_READ(V3D_IDENT2);
  87. vc4_v3d_pm_put(vc4);
  88. break;
  89. case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
  90. case DRM_VC4_PARAM_SUPPORTS_ETC1:
  91. case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
  92. case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
  93. case DRM_VC4_PARAM_SUPPORTS_MADVISE:
  94. case DRM_VC4_PARAM_SUPPORTS_PERFMON:
  95. args->value = true;
  96. break;
  97. default:
  98. DRM_DEBUG("Unknown parameter %d\n", args->param);
  99. return -EINVAL;
  100. }
  101. return 0;
  102. }
  103. static int vc4_open(struct drm_device *dev, struct drm_file *file)
  104. {
  105. struct vc4_file *vc4file;
  106. vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
  107. if (!vc4file)
  108. return -ENOMEM;
  109. vc4_perfmon_open_file(vc4file);
  110. file->driver_priv = vc4file;
  111. return 0;
  112. }
  113. static void vc4_close(struct drm_device *dev, struct drm_file *file)
  114. {
  115. struct vc4_dev *vc4 = to_vc4_dev(dev);
  116. struct vc4_file *vc4file = file->driver_priv;
  117. if (vc4file->bin_bo_used)
  118. vc4_v3d_bin_bo_put(vc4);
  119. vc4_perfmon_close_file(vc4file);
  120. kfree(vc4file);
  121. }
  122. static const struct vm_operations_struct vc4_vm_ops = {
  123. .fault = vc4_fault,
  124. .open = drm_gem_vm_open,
  125. .close = drm_gem_vm_close,
  126. };
  127. static const struct file_operations vc4_drm_fops = {
  128. .owner = THIS_MODULE,
  129. .open = drm_open,
  130. .release = drm_release,
  131. .unlocked_ioctl = drm_ioctl,
  132. .mmap = vc4_mmap,
  133. .poll = drm_poll,
  134. .read = drm_read,
  135. .compat_ioctl = drm_compat_ioctl,
  136. .llseek = noop_llseek,
  137. };
  138. static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
  139. DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
  140. DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
  141. DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
  142. DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
  143. DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
  144. DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
  145. DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
  146. DRM_ROOT_ONLY),
  147. DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
  148. DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
  149. DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
  150. DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
  151. DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
  152. DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
  153. DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
  154. DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
  155. };
  156. static struct drm_driver vc4_drm_driver = {
  157. .driver_features = (DRIVER_MODESET |
  158. DRIVER_ATOMIC |
  159. DRIVER_GEM |
  160. DRIVER_RENDER |
  161. DRIVER_SYNCOBJ),
  162. .open = vc4_open,
  163. .postclose = vc4_close,
  164. .irq_handler = vc4_irq,
  165. .irq_preinstall = vc4_irq_preinstall,
  166. .irq_postinstall = vc4_irq_postinstall,
  167. .irq_uninstall = vc4_irq_uninstall,
  168. #if defined(CONFIG_DEBUG_FS)
  169. .debugfs_init = vc4_debugfs_init,
  170. #endif
  171. .gem_create_object = vc4_create_object,
  172. .gem_free_object_unlocked = vc4_free_object,
  173. .gem_vm_ops = &vc4_vm_ops,
  174. .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
  175. .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
  176. .gem_prime_export = vc4_prime_export,
  177. .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
  178. .gem_prime_import_sg_table = vc4_prime_import_sg_table,
  179. .gem_prime_vmap = vc4_prime_vmap,
  180. .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
  181. .gem_prime_mmap = vc4_prime_mmap,
  182. .dumb_create = vc4_dumb_create,
  183. .ioctls = vc4_drm_ioctls,
  184. .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
  185. .fops = &vc4_drm_fops,
  186. .name = DRIVER_NAME,
  187. .desc = DRIVER_DESC,
  188. .date = DRIVER_DATE,
  189. .major = DRIVER_MAJOR,
  190. .minor = DRIVER_MINOR,
  191. .patchlevel = DRIVER_PATCHLEVEL,
  192. };
  193. static int compare_dev(struct device *dev, void *data)
  194. {
  195. return dev == data;
  196. }
  197. static void vc4_match_add_drivers(struct device *dev,
  198. struct component_match **match,
  199. struct platform_driver *const *drivers,
  200. int count)
  201. {
  202. int i;
  203. for (i = 0; i < count; i++) {
  204. struct device_driver *drv = &drivers[i]->driver;
  205. struct device *p = NULL, *d;
  206. while ((d = platform_find_device_by_driver(p, drv))) {
  207. put_device(p);
  208. component_match_add(dev, match, compare_dev, d);
  209. p = d;
  210. }
  211. put_device(p);
  212. }
  213. }
  214. static int vc4_drm_bind(struct device *dev)
  215. {
  216. struct platform_device *pdev = to_platform_device(dev);
  217. struct drm_device *drm;
  218. struct vc4_dev *vc4;
  219. struct device_node *node;
  220. struct drm_crtc *crtc;
  221. int ret = 0;
  222. dev->coherent_dma_mask = DMA_BIT_MASK(32);
  223. /* If VC4 V3D is missing, don't advertise render nodes. */
  224. node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
  225. if (!node || !of_device_is_available(node))
  226. vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
  227. of_node_put(node);
  228. vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
  229. if (IS_ERR(vc4))
  230. return PTR_ERR(vc4);
  231. drm = &vc4->base;
  232. platform_set_drvdata(pdev, drm);
  233. INIT_LIST_HEAD(&vc4->debugfs_list);
  234. mutex_init(&vc4->bin_bo_lock);
  235. ret = vc4_bo_cache_init(drm);
  236. if (ret)
  237. return ret;
  238. ret = drmm_mode_config_init(drm);
  239. if (ret)
  240. return ret;
  241. ret = vc4_gem_init(drm);
  242. if (ret)
  243. return ret;
  244. ret = component_bind_all(dev, drm);
  245. if (ret)
  246. return ret;
  247. ret = vc4_plane_create_additional_planes(drm);
  248. if (ret)
  249. goto unbind_all;
  250. drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
  251. ret = vc4_kms_load(drm);
  252. if (ret < 0)
  253. goto unbind_all;
  254. drm_for_each_crtc(crtc, drm)
  255. vc4_crtc_disable_at_boot(crtc);
  256. ret = drm_dev_register(drm, 0);
  257. if (ret < 0)
  258. goto unbind_all;
  259. drm_fbdev_generic_setup(drm, 16);
  260. return 0;
  261. unbind_all:
  262. component_unbind_all(dev, drm);
  263. return ret;
  264. }
  265. static void vc4_drm_unbind(struct device *dev)
  266. {
  267. struct drm_device *drm = dev_get_drvdata(dev);
  268. drm_dev_unregister(drm);
  269. drm_atomic_helper_shutdown(drm);
  270. }
  271. static const struct component_master_ops vc4_drm_ops = {
  272. .bind = vc4_drm_bind,
  273. .unbind = vc4_drm_unbind,
  274. };
  275. static struct platform_driver *const component_drivers[] = {
  276. &vc4_hdmi_driver,
  277. &vc4_vec_driver,
  278. &vc4_dpi_driver,
  279. &vc4_dsi_driver,
  280. &vc4_hvs_driver,
  281. &vc4_txp_driver,
  282. &vc4_crtc_driver,
  283. &vc4_v3d_driver,
  284. };
  285. static int vc4_platform_drm_probe(struct platform_device *pdev)
  286. {
  287. struct component_match *match = NULL;
  288. struct device *dev = &pdev->dev;
  289. vc4_match_add_drivers(dev, &match,
  290. component_drivers, ARRAY_SIZE(component_drivers));
  291. return component_master_add_with_match(dev, &vc4_drm_ops, match);
  292. }
  293. static int vc4_platform_drm_remove(struct platform_device *pdev)
  294. {
  295. component_master_del(&pdev->dev, &vc4_drm_ops);
  296. return 0;
  297. }
  298. static const struct of_device_id vc4_of_match[] = {
  299. { .compatible = "brcm,bcm2711-vc5", },
  300. { .compatible = "brcm,bcm2835-vc4", },
  301. { .compatible = "brcm,cygnus-vc4", },
  302. {},
  303. };
  304. MODULE_DEVICE_TABLE(of, vc4_of_match);
  305. static struct platform_driver vc4_platform_driver = {
  306. .probe = vc4_platform_drm_probe,
  307. .remove = vc4_platform_drm_remove,
  308. .driver = {
  309. .name = "vc4-drm",
  310. .of_match_table = vc4_of_match,
  311. },
  312. };
  313. static int __init vc4_drm_register(void)
  314. {
  315. int ret;
  316. ret = platform_register_drivers(component_drivers,
  317. ARRAY_SIZE(component_drivers));
  318. if (ret)
  319. return ret;
  320. return platform_driver_register(&vc4_platform_driver);
  321. }
  322. static void __exit vc4_drm_unregister(void)
  323. {
  324. platform_unregister_drivers(component_drivers,
  325. ARRAY_SIZE(component_drivers));
  326. platform_driver_unregister(&vc4_platform_driver);
  327. }
  328. module_init(vc4_drm_register);
  329. module_exit(vc4_drm_unregister);
  330. MODULE_ALIAS("platform:vc4-drm");
  331. MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
  332. MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
  333. MODULE_LICENSE("GPL v2");