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 37 #include "uapi/drm/vc4_drm.h" 38 #include "vc4_drv.h" 39 #include "vc4_regs.h" 40 41 #define DRIVER_NAME "vc4" 42 #define DRIVER_DESC "Broadcom VC4 graphics" 43 #define DRIVER_DATE "20140616" 44 #define DRIVER_MAJOR 0 45 #define DRIVER_MINOR 0 46 #define DRIVER_PATCHLEVEL 0 47 48 /* Helper function for mapping the regs on a platform device. */ 49 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index) 50 { 51 struct resource *res; 52 void __iomem *map; 53 54 res = platform_get_resource(dev, IORESOURCE_MEM, index); 55 map = devm_ioremap_resource(&dev->dev, res); 56 if (IS_ERR(map)) { 57 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map)); 58 return map; 59 } 60 61 return map; 62 } 63 64 static int vc4_get_param_ioctl(struct drm_device *dev, void *data, 65 struct drm_file *file_priv) 66 { 67 struct vc4_dev *vc4 = to_vc4_dev(dev); 68 struct drm_vc4_get_param *args = data; 69 int ret; 70 71 if (args->pad != 0) 72 return -EINVAL; 73 74 switch (args->param) { 75 case DRM_VC4_PARAM_V3D_IDENT0: 76 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 77 if (ret < 0) 78 return ret; 79 args->value = V3D_READ(V3D_IDENT0); 80 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 81 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 82 break; 83 case DRM_VC4_PARAM_V3D_IDENT1: 84 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 85 if (ret < 0) 86 return ret; 87 args->value = V3D_READ(V3D_IDENT1); 88 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 89 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 90 break; 91 case DRM_VC4_PARAM_V3D_IDENT2: 92 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); 93 if (ret < 0) 94 return ret; 95 args->value = V3D_READ(V3D_IDENT2); 96 pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev); 97 pm_runtime_put_autosuspend(&vc4->v3d->pdev->dev); 98 break; 99 case DRM_VC4_PARAM_SUPPORTS_BRANCHES: 100 case DRM_VC4_PARAM_SUPPORTS_ETC1: 101 case DRM_VC4_PARAM_SUPPORTS_THREADED_FS: 102 case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER: 103 case DRM_VC4_PARAM_SUPPORTS_MADVISE: 104 case DRM_VC4_PARAM_SUPPORTS_PERFMON: 105 args->value = true; 106 break; 107 default: 108 DRM_DEBUG("Unknown parameter %d\n", args->param); 109 return -EINVAL; 110 } 111 112 return 0; 113 } 114 115 static int vc4_open(struct drm_device *dev, struct drm_file *file) 116 { 117 struct vc4_file *vc4file; 118 119 vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); 120 if (!vc4file) 121 return -ENOMEM; 122 123 vc4_perfmon_open_file(vc4file); 124 file->driver_priv = vc4file; 125 return 0; 126 } 127 128 static void vc4_close(struct drm_device *dev, struct drm_file *file) 129 { 130 struct vc4_file *vc4file = file->driver_priv; 131 132 vc4_perfmon_close_file(vc4file); 133 kfree(vc4file); 134 } 135 136 static const struct vm_operations_struct vc4_vm_ops = { 137 .fault = vc4_fault, 138 .open = drm_gem_vm_open, 139 .close = drm_gem_vm_close, 140 }; 141 142 static const struct file_operations vc4_drm_fops = { 143 .owner = THIS_MODULE, 144 .open = drm_open, 145 .release = drm_release, 146 .unlocked_ioctl = drm_ioctl, 147 .mmap = vc4_mmap, 148 .poll = drm_poll, 149 .read = drm_read, 150 .compat_ioctl = drm_compat_ioctl, 151 .llseek = noop_llseek, 152 }; 153 154 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 155 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 156 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 157 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 158 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 159 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 160 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 161 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 162 DRM_ROOT_ONLY), 163 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 164 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), 165 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), 166 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), 167 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), 168 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), 169 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), 170 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), 171 }; 172 173 static struct drm_driver vc4_drm_driver = { 174 .driver_features = (DRIVER_MODESET | 175 DRIVER_ATOMIC | 176 DRIVER_GEM | 177 DRIVER_HAVE_IRQ | 178 DRIVER_RENDER | 179 DRIVER_PRIME | 180 DRIVER_SYNCOBJ), 181 .lastclose = drm_fb_helper_lastclose, 182 .open = vc4_open, 183 .postclose = vc4_close, 184 .irq_handler = vc4_irq, 185 .irq_preinstall = vc4_irq_preinstall, 186 .irq_postinstall = vc4_irq_postinstall, 187 .irq_uninstall = vc4_irq_uninstall, 188 189 .get_scanout_position = vc4_crtc_get_scanoutpos, 190 .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos, 191 192 #if defined(CONFIG_DEBUG_FS) 193 .debugfs_init = vc4_debugfs_init, 194 #endif 195 196 .gem_create_object = vc4_create_object, 197 .gem_free_object_unlocked = vc4_free_object, 198 .gem_vm_ops = &vc4_vm_ops, 199 200 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 201 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 202 .gem_prime_import = drm_gem_prime_import, 203 .gem_prime_export = vc4_prime_export, 204 .gem_prime_res_obj = vc4_prime_res_obj, 205 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, 206 .gem_prime_import_sg_table = vc4_prime_import_sg_table, 207 .gem_prime_vmap = vc4_prime_vmap, 208 .gem_prime_vunmap = drm_gem_cma_prime_vunmap, 209 .gem_prime_mmap = vc4_prime_mmap, 210 211 .dumb_create = vc4_dumb_create, 212 213 .ioctls = vc4_drm_ioctls, 214 .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls), 215 .fops = &vc4_drm_fops, 216 217 .name = DRIVER_NAME, 218 .desc = DRIVER_DESC, 219 .date = DRIVER_DATE, 220 .major = DRIVER_MAJOR, 221 .minor = DRIVER_MINOR, 222 .patchlevel = DRIVER_PATCHLEVEL, 223 }; 224 225 static int compare_dev(struct device *dev, void *data) 226 { 227 return dev == data; 228 } 229 230 static void vc4_match_add_drivers(struct device *dev, 231 struct component_match **match, 232 struct platform_driver *const *drivers, 233 int count) 234 { 235 int i; 236 237 for (i = 0; i < count; i++) { 238 struct device_driver *drv = &drivers[i]->driver; 239 struct device *p = NULL, *d; 240 241 while ((d = bus_find_device(&platform_bus_type, p, drv, 242 (void *)platform_bus_type.match))) { 243 put_device(p); 244 component_match_add(dev, match, compare_dev, d); 245 p = d; 246 } 247 put_device(p); 248 } 249 } 250 251 static void vc4_kick_out_firmware_fb(void) 252 { 253 struct apertures_struct *ap; 254 255 ap = alloc_apertures(1); 256 if (!ap) 257 return; 258 259 /* Since VC4 is a UMA device, the simplefb node may have been 260 * located anywhere in memory. 261 */ 262 ap->ranges[0].base = 0; 263 ap->ranges[0].size = ~0; 264 265 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false); 266 kfree(ap); 267 } 268 269 static int vc4_drm_bind(struct device *dev) 270 { 271 struct platform_device *pdev = to_platform_device(dev); 272 struct drm_device *drm; 273 struct vc4_dev *vc4; 274 int ret = 0; 275 276 dev->coherent_dma_mask = DMA_BIT_MASK(32); 277 278 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 279 if (!vc4) 280 return -ENOMEM; 281 282 drm = drm_dev_alloc(&vc4_drm_driver, dev); 283 if (IS_ERR(drm)) 284 return PTR_ERR(drm); 285 platform_set_drvdata(pdev, drm); 286 vc4->dev = drm; 287 drm->dev_private = vc4; 288 289 ret = vc4_bo_cache_init(drm); 290 if (ret) 291 goto dev_unref; 292 293 drm_mode_config_init(drm); 294 295 vc4_gem_init(drm); 296 297 ret = component_bind_all(dev, drm); 298 if (ret) 299 goto gem_destroy; 300 301 vc4_kick_out_firmware_fb(); 302 303 ret = drm_dev_register(drm, 0); 304 if (ret < 0) 305 goto unbind_all; 306 307 vc4_kms_load(drm); 308 309 return 0; 310 311 unbind_all: 312 component_unbind_all(dev, drm); 313 gem_destroy: 314 vc4_gem_destroy(drm); 315 vc4_bo_cache_destroy(drm); 316 dev_unref: 317 drm_dev_unref(drm); 318 return ret; 319 } 320 321 static void vc4_drm_unbind(struct device *dev) 322 { 323 struct drm_device *drm = dev_get_drvdata(dev); 324 struct vc4_dev *vc4 = to_vc4_dev(drm); 325 326 drm_dev_unregister(drm); 327 328 drm_fb_cma_fbdev_fini(drm); 329 330 drm_mode_config_cleanup(drm); 331 332 drm_atomic_private_obj_fini(&vc4->ctm_manager); 333 334 drm_dev_unref(drm); 335 } 336 337 static const struct component_master_ops vc4_drm_ops = { 338 .bind = vc4_drm_bind, 339 .unbind = vc4_drm_unbind, 340 }; 341 342 static struct platform_driver *const component_drivers[] = { 343 &vc4_hdmi_driver, 344 &vc4_vec_driver, 345 &vc4_dpi_driver, 346 &vc4_dsi_driver, 347 &vc4_hvs_driver, 348 &vc4_crtc_driver, 349 &vc4_v3d_driver, 350 }; 351 352 static int vc4_platform_drm_probe(struct platform_device *pdev) 353 { 354 struct component_match *match = NULL; 355 struct device *dev = &pdev->dev; 356 357 vc4_match_add_drivers(dev, &match, 358 component_drivers, ARRAY_SIZE(component_drivers)); 359 360 return component_master_add_with_match(dev, &vc4_drm_ops, match); 361 } 362 363 static int vc4_platform_drm_remove(struct platform_device *pdev) 364 { 365 component_master_del(&pdev->dev, &vc4_drm_ops); 366 367 return 0; 368 } 369 370 static const struct of_device_id vc4_of_match[] = { 371 { .compatible = "brcm,bcm2835-vc4", }, 372 { .compatible = "brcm,cygnus-vc4", }, 373 {}, 374 }; 375 MODULE_DEVICE_TABLE(of, vc4_of_match); 376 377 static struct platform_driver vc4_platform_driver = { 378 .probe = vc4_platform_drm_probe, 379 .remove = vc4_platform_drm_remove, 380 .driver = { 381 .name = "vc4-drm", 382 .of_match_table = vc4_of_match, 383 }, 384 }; 385 386 static int __init vc4_drm_register(void) 387 { 388 int ret; 389 390 ret = platform_register_drivers(component_drivers, 391 ARRAY_SIZE(component_drivers)); 392 if (ret) 393 return ret; 394 395 return platform_driver_register(&vc4_platform_driver); 396 } 397 398 static void __exit vc4_drm_unregister(void) 399 { 400 platform_unregister_drivers(component_drivers, 401 ARRAY_SIZE(component_drivers)); 402 platform_driver_unregister(&vc4_platform_driver); 403 } 404 405 module_init(vc4_drm_register); 406 module_exit(vc4_drm_unregister); 407 408 MODULE_ALIAS("platform:vc4-drm"); 409 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 410 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 411 MODULE_LICENSE("GPL v2"); 412