1 /* 2 * Copyright (C) 2014-2015 Broadcom 3 * Copyright (C) 2013 Red Hat 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 10 /** 11 * DOC: Broadcom VC4 Graphics Driver 12 * 13 * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a 14 * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly 15 * configurable display output pipeline that supports HDMI, DSI, DPI, 16 * and Composite TV output. 17 * 18 * The 3D engine also has an interface for submitting arbitrary 19 * compute shader-style jobs using the same shader processor as is 20 * used for vertex and fragment shaders in GLES 2.0. However, given 21 * that the hardware isn't able to expose any standard interfaces like 22 * OpenGL compute shaders or OpenCL, it isn't supported by this 23 * driver. 24 */ 25 26 #include <linux/clk.h> 27 #include <linux/component.h> 28 #include <linux/device.h> 29 #include <linux/io.h> 30 #include <linux/module.h> 31 #include <linux/of_platform.h> 32 #include <linux/platform_device.h> 33 #include <linux/pm_runtime.h> 34 #include <drm/drm_fb_cma_helper.h> 35 #include <drm/drm_fb_helper.h> 36 #include <drm/drm_atomic_helper.h> 37 38 #include "uapi/drm/vc4_drm.h" 39 #include "vc4_drv.h" 40 #include "vc4_regs.h" 41 42 #define DRIVER_NAME "vc4" 43 #define DRIVER_DESC "Broadcom VC4 graphics" 44 #define DRIVER_DATE "20140616" 45 #define DRIVER_MAJOR 0 46 #define DRIVER_MINOR 0 47 #define DRIVER_PATCHLEVEL 0 48 49 /* Helper function for mapping the regs on a platform device. */ 50 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) 51 { 52 struct resource *res; 53 void __iomem *map; 54 55 res = platform_get_resource(dev, IORESOURCE_MEM, index); 56 map = devm_ioremap_resource(&dev->dev, res); 57 if (IS_ERR(map)) { 58 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); 59 return map; 60 } 61 62 return map; 63 } 64 65 static int vc4_get_param_ioctl(struct drm_device *dev, void *data, 66 struct drm_file *file_priv) 67 { 68 struct vc4_dev *vc4 = to_vc4_dev(dev); 69 struct drm_vc4_get_param *args = data; 70 int ret; 71 72 if (args->pad != 0) 73 return -EINVAL; 74 75 if (!vc4->v3d) 76 return -ENODEV; 77 78 switch (args->param) { 79 case DRM_VC4_PARAM_V3D_IDENT0: 80 ret = vc4_v3d_pm_get(vc4); 81 if (ret) 82 return ret; 83 args->value = V3D_READ(V3D_IDENT0); 84 vc4_v3d_pm_put(vc4); 85 break; 86 case DRM_VC4_PARAM_V3D_IDENT1: 87 ret = vc4_v3d_pm_get(vc4); 88 if (ret) 89 return ret; 90 args->value = V3D_READ(V3D_IDENT1); 91 vc4_v3d_pm_put(vc4); 92 break; 93 case DRM_VC4_PARAM_V3D_IDENT2: 94 ret = vc4_v3d_pm_get(vc4); 95 if (ret) 96 return ret; 97 args->value = V3D_READ(V3D_IDENT2); 98 vc4_v3d_pm_put(vc4); 99 break; 100 case DRM_VC4_PARAM_SUPPORTS_BRANCHES: 101 case DRM_VC4_PARAM_SUPPORTS_ETC1: 102 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: 103 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER: 104 case DRM_VC4_PARAM_SUPPORTS_MADVISE: 105 case DRM_VC4_PARAM_SUPPORTS_PERFMON: 106 args->value = true; 107 break; 108 default: 109 DRM_DEBUG("Unknown parameter %d\n", args->param); 110 return -EINVAL; 111 } 112 113 return 0; 114 } 115 116 static int vc4_open(struct drm_device *dev, struct drm_file *file) 117 { 118 struct vc4_file *vc4file; 119 120 vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); 121 if (!vc4file) 122 return -ENOMEM; 123 124 vc4_perfmon_open_file(vc4file); 125 file->driver_priv = vc4file; 126 return 0; 127 } 128 129 static void vc4_close(struct drm_device *dev, struct drm_file *file) 130 { 131 struct vc4_file *vc4file = file->driver_priv; 132 133 vc4_perfmon_close_file(vc4file); 134 kfree(vc4file); 135 } 136 137 static const struct vm_operations_struct vc4_vm_ops = { 138 .fault = vc4_fault, 139 .open = drm_gem_vm_open, 140 .close = drm_gem_vm_close, 141 }; 142 143 static const struct file_operations vc4_drm_fops = { 144 .owner = THIS_MODULE, 145 .open = drm_open, 146 .release = drm_release, 147 .unlocked_ioctl = drm_ioctl, 148 .mmap = vc4_mmap, 149 .poll = drm_poll, 150 .read = drm_read, 151 .compat_ioctl = drm_compat_ioctl, 152 .llseek = noop_llseek, 153 }; 154 155 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 156 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 157 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 158 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 159 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 160 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 161 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 162 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 163 DRM_ROOT_ONLY), 164 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 165 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), 166 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), 167 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), 168 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), 169 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), 170 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), 171 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), 172 }; 173 174 static struct drm_driver vc4_drm_driver = { 175 .driver_features = (DRIVER_MODESET | 176 DRIVER_ATOMIC | 177 DRIVER_GEM | 178 DRIVER_RENDER | 179 DRIVER_PRIME | 180 DRIVER_SYNCOBJ), 181 .open = vc4_open, 182 .postclose = vc4_close, 183 .irq_handler = vc4_irq, 184 .irq_preinstall = vc4_irq_preinstall, 185 .irq_postinstall = vc4_irq_postinstall, 186 .irq_uninstall = vc4_irq_uninstall, 187 188 .get_scanout_position = vc4_crtc_get_scanoutpos, 189 .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos, 190 191 #if defined(CONFIG_DEBUG_FS) 192 .debugfs_init = vc4_debugfs_init, 193 #endif 194 195 .gem_create_object = vc4_create_object, 196 .gem_free_object_unlocked = vc4_free_object, 197 .gem_vm_ops = &vc4_vm_ops, 198 199 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 200 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 201 .gem_prime_import = drm_gem_prime_import, 202 .gem_prime_export = vc4_prime_export, 203 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 204 .gem_prime_import_sg_table = vc4_prime_import_sg_table, 205 .gem_prime_vmap = vc4_prime_vmap, 206 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 207 .gem_prime_mmap = vc4_prime_mmap, 208 209 .dumb_create = vc4_dumb_create, 210 211 .ioctls = vc4_drm_ioctls, 212 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 213 .fops = &vc4_drm_fops, 214 215 .name = DRIVER_NAME, 216 .desc = DRIVER_DESC, 217 .date = DRIVER_DATE, 218 .major = DRIVER_MAJOR, 219 .minor = DRIVER_MINOR, 220 .patchlevel = DRIVER_PATCHLEVEL, 221 }; 222 223 static int compare_dev(struct device *dev, void *data) 224 { 225 return dev == data; 226 } 227 228 static void vc4_match_add_drivers(struct device *dev, 229 struct component_match **match, 230 struct platform_driver *const *drivers, 231 int count) 232 { 233 int i; 234 235 for (i = 0; i < count; i++) { 236 struct device_driver *drv = &drivers[i]->driver; 237 struct device *p = NULL, *d; 238 239 while ((d = bus_find_device(&platform_bus_type, p, drv, 240 (void *)platform_bus_type.match))) { 241 put_device(p); 242 component_match_add(dev, match, compare_dev, d); 243 p = d; 244 } 245 put_device(p); 246 } 247 } 248 249 static int vc4_drm_bind(struct device *dev) 250 { 251 struct platform_device *pdev = to_platform_device(dev); 252 struct drm_device *drm; 253 struct vc4_dev *vc4; 254 struct device_node *node; 255 int ret = 0; 256 257 dev->coherent_dma_mask = DMA_BIT_MASK(32); 258 259 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 260 if (!vc4) 261 return -ENOMEM; 262 263 /* If VC4 V3D is missing, don't advertise render nodes. */ 264 node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL); 265 if (!node || !of_device_is_available(node)) 266 vc4_drm_driver.driver_features &= ~DRIVER_RENDER; 267 of_node_put(node); 268 269 drm = drm_dev_alloc(&vc4_drm_driver, dev); 270 if (IS_ERR(drm)) 271 return PTR_ERR(drm); 272 platform_set_drvdata(pdev, drm); 273 vc4->dev = drm; 274 drm->dev_private = vc4; 275 INIT_LIST_HEAD(&vc4->debugfs_list); 276 277 ret = vc4_bo_cache_init(drm); 278 if (ret) 279 goto dev_put; 280 281 drm_mode_config_init(drm); 282 283 vc4_gem_init(drm); 284 285 ret = component_bind_all(dev, drm); 286 if (ret) 287 goto gem_destroy; 288 289 drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false); 290 291 ret = vc4_kms_load(drm); 292 if (ret < 0) 293 goto unbind_all; 294 295 ret = drm_dev_register(drm, 0); 296 if (ret < 0) 297 goto unbind_all; 298 299 drm_fbdev_generic_setup(drm, 16); 300 301 return 0; 302 303 unbind_all: 304 component_unbind_all(dev, drm); 305 gem_destroy: 306 vc4_gem_destroy(drm); 307 vc4_bo_cache_destroy(drm); 308 dev_put: 309 drm_dev_put(drm); 310 return ret; 311 } 312 313 static void vc4_drm_unbind(struct device *dev) 314 { 315 struct drm_device *drm = dev_get_drvdata(dev); 316 struct vc4_dev *vc4 = to_vc4_dev(drm); 317 318 drm_dev_unregister(drm); 319 320 drm_atomic_helper_shutdown(drm); 321 322 drm_mode_config_cleanup(drm); 323 324 drm_atomic_private_obj_fini(&vc4->load_tracker); 325 drm_atomic_private_obj_fini(&vc4->ctm_manager); 326 327 drm_dev_put(drm); 328 } 329 330 static const struct component_master_ops vc4_drm_ops = { 331 .bind = vc4_drm_bind, 332 .unbind = vc4_drm_unbind, 333 }; 334 335 static struct platform_driver *const component_drivers[] = { 336 &vc4_hdmi_driver, 337 &vc4_vec_driver, 338 &vc4_dpi_driver, 339 &vc4_dsi_driver, 340 &vc4_txp_driver, 341 &vc4_hvs_driver, 342 &vc4_crtc_driver, 343 &vc4_v3d_driver, 344 }; 345 346 static int vc4_platform_drm_probe(struct platform_device *pdev) 347 { 348 struct component_match *match = NULL; 349 struct device *dev = &pdev->dev; 350 351 vc4_match_add_drivers(dev, &match, 352 component_drivers, ARRAY_SIZE(component_drivers)); 353 354 return component_master_add_with_match(dev, &vc4_drm_ops, match); 355 } 356 357 static int vc4_platform_drm_remove(struct platform_device *pdev) 358 { 359 component_master_del(&pdev->dev, &vc4_drm_ops); 360 361 return 0; 362 } 363 364 static const struct of_device_id vc4_of_match[] = { 365 { .compatible = "brcm,bcm2835-vc4", }, 366 { .compatible = "brcm,cygnus-vc4", }, 367 {}, 368 }; 369 MODULE_DEVICE_TABLE(of, vc4_of_match); 370 371 static struct platform_driver vc4_platform_driver = { 372 .probe = vc4_platform_drm_probe, 373 .remove = vc4_platform_drm_remove, 374 .driver = { 375 .name = "vc4-drm", 376 .of_match_table = vc4_of_match, 377 }, 378 }; 379 380 static int __init vc4_drm_register(void) 381 { 382 int ret; 383 384 ret = platform_register_drivers(component_drivers, 385 ARRAY_SIZE(component_drivers)); 386 if (ret) 387 return ret; 388 389 return platform_driver_register(&vc4_platform_driver); 390 } 391 392 static void __exit vc4_drm_unregister(void) 393 { 394 platform_unregister_drivers(component_drivers, 395 ARRAY_SIZE(component_drivers)); 396 platform_driver_unregister(&vc4_platform_driver); 397 } 398 399 module_init(vc4_drm_register); 400 module_exit(vc4_drm_unregister); 401 402 MODULE_ALIAS("platform:vc4-drm"); 403 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 404 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 405 MODULE_LICENSE("GPL v2"); 406