1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2014-2015 Broadcom 4 * Copyright (C) 2013 Red Hat 5 */ 6 7 /** 8 * DOC: Broadcom VC4 Graphics Driver 9 * 10 * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a 11 * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly 12 * configurable display output pipeline that supports HDMI, DSI, DPI, 13 * and Composite TV output. 14 * 15 * The 3D engine also has an interface for submitting arbitrary 16 * compute shader-style jobs using the same shader processor as is 17 * used for vertex and fragment shaders in GLES 2.0. However, given 18 * that the hardware isn't able to expose any standard interfaces like 19 * OpenGL compute shaders or OpenCL, it isn't supported by this 20 * driver. 21 */ 22 23 #include <linux/clk.h> 24 #include <linux/component.h> 25 #include <linux/device.h> 26 #include <linux/io.h> 27 #include <linux/module.h> 28 #include <linux/of_platform.h> 29 #include <linux/platform_device.h> 30 #include <linux/pm_runtime.h> 31 #include <drm/drm_fb_cma_helper.h> 32 #include <drm/drm_fb_helper.h> 33 #include <drm/drm_atomic_helper.h> 34 35 #include "uapi/drm/vc4_drm.h" 36 #include "vc4_drv.h" 37 #include "vc4_regs.h" 38 39 #define DRIVER_NAME "vc4" 40 #define DRIVER_DESC "Broadcom VC4 graphics" 41 #define DRIVER_DATE "20140616" 42 #define DRIVER_MAJOR 0 43 #define DRIVER_MINOR 0 44 #define DRIVER_PATCHLEVEL 0 45 46 /* Helper function for mapping the regs on a platform device. */ 47 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) 48 { 49 struct resource *res; 50 void __iomem *map; 51 52 res = platform_get_resource(dev, IORESOURCE_MEM, index); 53 map = devm_ioremap_resource(&dev->dev, res); 54 if (IS_ERR(map)) { 55 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); 56 return map; 57 } 58 59 return map; 60 } 61 62 static int vc4_get_param_ioctl(struct drm_device *dev, void *data, 63 struct drm_file *file_priv) 64 { 65 struct vc4_dev *vc4 = to_vc4_dev(dev); 66 struct drm_vc4_get_param *args = data; 67 int ret; 68 69 if (args->pad != 0) 70 return -EINVAL; 71 72 if (!vc4->v3d) 73 return -ENODEV; 74 75 switch (args->param) { 76 case DRM_VC4_PARAM_V3D_IDENT0: 77 ret = vc4_v3d_pm_get(vc4); 78 if (ret) 79 return ret; 80 args->value = V3D_READ(V3D_IDENT0); 81 vc4_v3d_pm_put(vc4); 82 break; 83 case DRM_VC4_PARAM_V3D_IDENT1: 84 ret = vc4_v3d_pm_get(vc4); 85 if (ret) 86 return ret; 87 args->value = V3D_READ(V3D_IDENT1); 88 vc4_v3d_pm_put(vc4); 89 break; 90 case DRM_VC4_PARAM_V3D_IDENT2: 91 ret = vc4_v3d_pm_get(vc4); 92 if (ret) 93 return ret; 94 args->value = V3D_READ(V3D_IDENT2); 95 vc4_v3d_pm_put(vc4); 96 break; 97 case DRM_VC4_PARAM_SUPPORTS_BRANCHES: 98 case DRM_VC4_PARAM_SUPPORTS_ETC1: 99 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: 100 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER: 101 case DRM_VC4_PARAM_SUPPORTS_MADVISE: 102 case DRM_VC4_PARAM_SUPPORTS_PERFMON: 103 args->value = true; 104 break; 105 default: 106 DRM_DEBUG("Unknown parameter %d\n", args->param); 107 return -EINVAL; 108 } 109 110 return 0; 111 } 112 113 static int vc4_open(struct drm_device *dev, struct drm_file *file) 114 { 115 struct vc4_file *vc4file; 116 117 vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); 118 if (!vc4file) 119 return -ENOMEM; 120 121 vc4_perfmon_open_file(vc4file); 122 file->driver_priv = vc4file; 123 return 0; 124 } 125 126 static void vc4_close(struct drm_device *dev, struct drm_file *file) 127 { 128 struct vc4_file *vc4file = file->driver_priv; 129 130 vc4_perfmon_close_file(vc4file); 131 kfree(vc4file); 132 } 133 134 static const struct vm_operations_struct vc4_vm_ops = { 135 .fault = vc4_fault, 136 .open = drm_gem_vm_open, 137 .close = drm_gem_vm_close, 138 }; 139 140 static const struct file_operations vc4_drm_fops = { 141 .owner = THIS_MODULE, 142 .open = drm_open, 143 .release = drm_release, 144 .unlocked_ioctl = drm_ioctl, 145 .mmap = vc4_mmap, 146 .poll = drm_poll, 147 .read = drm_read, 148 .compat_ioctl = drm_compat_ioctl, 149 .llseek = noop_llseek, 150 }; 151 152 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 153 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 154 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 155 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 156 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 157 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 158 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 159 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 160 DRM_ROOT_ONLY), 161 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 162 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), 163 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), 164 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), 165 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), 166 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), 167 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), 168 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), 169 }; 170 171 static struct drm_driver vc4_drm_driver = { 172 .driver_features = (DRIVER_MODESET | 173 DRIVER_ATOMIC | 174 DRIVER_GEM | 175 DRIVER_RENDER | 176 DRIVER_PRIME | 177 DRIVER_SYNCOBJ), 178 .open = vc4_open, 179 .postclose = vc4_close, 180 .irq_handler = vc4_irq, 181 .irq_preinstall = vc4_irq_preinstall, 182 .irq_postinstall = vc4_irq_postinstall, 183 .irq_uninstall = vc4_irq_uninstall, 184 185 .get_scanout_position = vc4_crtc_get_scanoutpos, 186 .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos, 187 188 #if defined(CONFIG_DEBUG_FS) 189 .debugfs_init = vc4_debugfs_init, 190 #endif 191 192 .gem_create_object = vc4_create_object, 193 .gem_free_object_unlocked = vc4_free_object, 194 .gem_vm_ops = &vc4_vm_ops, 195 196 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 197 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 198 .gem_prime_import = drm_gem_prime_import, 199 .gem_prime_export = vc4_prime_export, 200 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 201 .gem_prime_import_sg_table = vc4_prime_import_sg_table, 202 .gem_prime_vmap = vc4_prime_vmap, 203 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 204 .gem_prime_mmap = vc4_prime_mmap, 205 206 .dumb_create = vc4_dumb_create, 207 208 .ioctls = vc4_drm_ioctls, 209 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 210 .fops = &vc4_drm_fops, 211 212 .name = DRIVER_NAME, 213 .desc = DRIVER_DESC, 214 .date = DRIVER_DATE, 215 .major = DRIVER_MAJOR, 216 .minor = DRIVER_MINOR, 217 .patchlevel = DRIVER_PATCHLEVEL, 218 }; 219 220 static int compare_dev(struct device *dev, void *data) 221 { 222 return dev == data; 223 } 224 225 static void vc4_match_add_drivers(struct device *dev, 226 struct component_match **match, 227 struct platform_driver *const *drivers, 228 int count) 229 { 230 int i; 231 232 for (i = 0; i < count; i++) { 233 struct device_driver *drv = &drivers[i]->driver; 234 struct device *p = NULL, *d; 235 236 while ((d = bus_find_device(&platform_bus_type, p, drv, 237 (void *)platform_bus_type.match))) { 238 put_device(p); 239 component_match_add(dev, match, compare_dev, d); 240 p = d; 241 } 242 put_device(p); 243 } 244 } 245 246 static int vc4_drm_bind(struct device *dev) 247 { 248 struct platform_device *pdev = to_platform_device(dev); 249 struct drm_device *drm; 250 struct vc4_dev *vc4; 251 struct device_node *node; 252 int ret = 0; 253 254 dev->coherent_dma_mask = DMA_BIT_MASK(32); 255 256 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 257 if (!vc4) 258 return -ENOMEM; 259 260 /* If VC4 V3D is missing, don't advertise render nodes. */ 261 node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL); 262 if (!node || !of_device_is_available(node)) 263 vc4_drm_driver.driver_features &= ~DRIVER_RENDER; 264 of_node_put(node); 265 266 drm = drm_dev_alloc(&vc4_drm_driver, dev); 267 if (IS_ERR(drm)) 268 return PTR_ERR(drm); 269 platform_set_drvdata(pdev, drm); 270 vc4->dev = drm; 271 drm->dev_private = vc4; 272 INIT_LIST_HEAD(&vc4->debugfs_list); 273 274 ret = vc4_bo_cache_init(drm); 275 if (ret) 276 goto dev_put; 277 278 drm_mode_config_init(drm); 279 280 vc4_gem_init(drm); 281 282 ret = component_bind_all(dev, drm); 283 if (ret) 284 goto gem_destroy; 285 286 drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false); 287 288 ret = vc4_kms_load(drm); 289 if (ret < 0) 290 goto unbind_all; 291 292 ret = drm_dev_register(drm, 0); 293 if (ret < 0) 294 goto unbind_all; 295 296 drm_fbdev_generic_setup(drm, 16); 297 298 return 0; 299 300 unbind_all: 301 component_unbind_all(dev, drm); 302 gem_destroy: 303 vc4_gem_destroy(drm); 304 vc4_bo_cache_destroy(drm); 305 dev_put: 306 drm_dev_put(drm); 307 return ret; 308 } 309 310 static void vc4_drm_unbind(struct device *dev) 311 { 312 struct drm_device *drm = dev_get_drvdata(dev); 313 struct vc4_dev *vc4 = to_vc4_dev(drm); 314 315 drm_dev_unregister(drm); 316 317 drm_atomic_helper_shutdown(drm); 318 319 drm_mode_config_cleanup(drm); 320 321 drm_atomic_private_obj_fini(&vc4->load_tracker); 322 drm_atomic_private_obj_fini(&vc4->ctm_manager); 323 324 drm_dev_put(drm); 325 } 326 327 static const struct component_master_ops vc4_drm_ops = { 328 .bind = vc4_drm_bind, 329 .unbind = vc4_drm_unbind, 330 }; 331 332 static struct platform_driver *const component_drivers[] = { 333 &vc4_hdmi_driver, 334 &vc4_vec_driver, 335 &vc4_dpi_driver, 336 &vc4_dsi_driver, 337 &vc4_txp_driver, 338 &vc4_hvs_driver, 339 &vc4_crtc_driver, 340 &vc4_v3d_driver, 341 }; 342 343 static int vc4_platform_drm_probe(struct platform_device *pdev) 344 { 345 struct component_match *match = NULL; 346 struct device *dev = &pdev->dev; 347 348 vc4_match_add_drivers(dev, &match, 349 component_drivers, ARRAY_SIZE(component_drivers)); 350 351 return component_master_add_with_match(dev, &vc4_drm_ops, match); 352 } 353 354 static int vc4_platform_drm_remove(struct platform_device *pdev) 355 { 356 component_master_del(&pdev->dev, &vc4_drm_ops); 357 358 return 0; 359 } 360 361 static const struct of_device_id vc4_of_match[] = { 362 { .compatible = "brcm,bcm2835-vc4", }, 363 { .compatible = "brcm,cygnus-vc4", }, 364 {}, 365 }; 366 MODULE_DEVICE_TABLE(of, vc4_of_match); 367 368 static struct platform_driver vc4_platform_driver = { 369 .probe = vc4_platform_drm_probe, 370 .remove = vc4_platform_drm_remove, 371 .driver = { 372 .name = "vc4-drm", 373 .of_match_table = vc4_of_match, 374 }, 375 }; 376 377 static int __init vc4_drm_register(void) 378 { 379 int ret; 380 381 ret = platform_register_drivers(component_drivers, 382 ARRAY_SIZE(component_drivers)); 383 if (ret) 384 return ret; 385 386 return platform_driver_register(&vc4_platform_driver); 387 } 388 389 static void __exit vc4_drm_unregister(void) 390 { 391 platform_unregister_drivers(component_drivers, 392 ARRAY_SIZE(component_drivers)); 393 platform_driver_unregister(&vc4_platform_driver); 394 } 395 396 module_init(vc4_drm_register); 397 module_exit(vc4_drm_unregister); 398 399 MODULE_ALIAS("platform:vc4-drm"); 400 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 401 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 402 MODULE_LICENSE("GPL v2"); 403