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 } 134 135 static const struct vm_operations_struct vc4_vm_ops = { 136 .fault = vc4_fault, 137 .open = drm_gem_vm_open, 138 .close = drm_gem_vm_close, 139 }; 140 141 static const struct file_operations vc4_drm_fops = { 142 .owner = THIS_MODULE, 143 .open = drm_open, 144 .release = drm_release, 145 .unlocked_ioctl = drm_ioctl, 146 .mmap = vc4_mmap, 147 .poll = drm_poll, 148 .read = drm_read, 149 .compat_ioctl = drm_compat_ioctl, 150 .llseek = noop_llseek, 151 }; 152 153 static const struct drm_ioctl_desc vc4_drm_ioctls[] = { 154 DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW), 155 DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW), 156 DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW), 157 DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW), 158 DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW), 159 DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW), 160 DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl, 161 DRM_ROOT_ONLY), 162 DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW), 163 DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW), 164 DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW), 165 DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW), 166 DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW), 167 DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW), 168 DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW), 169 DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW), 170 }; 171 172 static struct drm_driver vc4_drm_driver = { 173 .driver_features = (DRIVER_MODESET | 174 DRIVER_ATOMIC | 175 DRIVER_GEM | 176 DRIVER_HAVE_IRQ | 177 DRIVER_RENDER | 178 DRIVER_PRIME), 179 .lastclose = drm_fb_helper_lastclose, 180 .open = vc4_open, 181 .postclose = vc4_close, 182 .irq_handler = vc4_irq, 183 .irq_preinstall = vc4_irq_preinstall, 184 .irq_postinstall = vc4_irq_postinstall, 185 .irq_uninstall = vc4_irq_uninstall, 186 187 .get_scanout_position = vc4_crtc_get_scanoutpos, 188 .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos, 189 190 #if defined(CONFIG_DEBUG_FS) 191 .debugfs_init = vc4_debugfs_init, 192 #endif 193 194 .gem_create_object = vc4_create_object, 195 .gem_free_object_unlocked = vc4_free_object, 196 .gem_vm_ops = &vc4_vm_ops, 197 198 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, 199 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, 200 .gem_prime_import = drm_gem_prime_import, 201 .gem_prime_export = vc4_prime_export, 202 .gem_prime_res_obj = vc4_prime_res_obj, 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 void vc4_kick_out_firmware_fb(void) 250 { 251 struct apertures_struct *ap; 252 253 ap = alloc_apertures(1); 254 if (!ap) 255 return; 256 257 /* Since VC4 is a UMA device, the simplefb node may have been 258 * located anywhere in memory. 259 */ 260 ap->ranges[0].base = 0; 261 ap->ranges[0].size = ~0; 262 263 drm_fb_helper_remove_conflicting_framebuffers(ap, "vc4drmfb", false); 264 kfree(ap); 265 } 266 267 static int vc4_drm_bind(struct device *dev) 268 { 269 struct platform_device *pdev = to_platform_device(dev); 270 struct drm_device *drm; 271 struct vc4_dev *vc4; 272 int ret = 0; 273 274 dev->coherent_dma_mask = DMA_BIT_MASK(32); 275 276 vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL); 277 if (!vc4) 278 return -ENOMEM; 279 280 drm = drm_dev_alloc(&vc4_drm_driver, dev); 281 if (IS_ERR(drm)) 282 return PTR_ERR(drm); 283 platform_set_drvdata(pdev, drm); 284 vc4->dev = drm; 285 drm->dev_private = vc4; 286 287 ret = vc4_bo_cache_init(drm); 288 if (ret) 289 goto dev_unref; 290 291 drm_mode_config_init(drm); 292 293 vc4_gem_init(drm); 294 295 ret = component_bind_all(dev, drm); 296 if (ret) 297 goto gem_destroy; 298 299 vc4_kick_out_firmware_fb(); 300 301 ret = drm_dev_register(drm, 0); 302 if (ret < 0) 303 goto unbind_all; 304 305 vc4_kms_load(drm); 306 307 return 0; 308 309 unbind_all: 310 component_unbind_all(dev, drm); 311 gem_destroy: 312 vc4_gem_destroy(drm); 313 vc4_bo_cache_destroy(drm); 314 dev_unref: 315 drm_dev_unref(drm); 316 return ret; 317 } 318 319 static void vc4_drm_unbind(struct device *dev) 320 { 321 struct platform_device *pdev = to_platform_device(dev); 322 struct drm_device *drm = platform_get_drvdata(pdev); 323 324 drm_dev_unregister(drm); 325 326 drm_fb_cma_fbdev_fini(drm); 327 328 drm_mode_config_cleanup(drm); 329 330 drm_dev_unref(drm); 331 } 332 333 static const struct component_master_ops vc4_drm_ops = { 334 .bind = vc4_drm_bind, 335 .unbind = vc4_drm_unbind, 336 }; 337 338 static struct platform_driver *const component_drivers[] = { 339 &vc4_hdmi_driver, 340 &vc4_vec_driver, 341 &vc4_dpi_driver, 342 &vc4_dsi_driver, 343 &vc4_hvs_driver, 344 &vc4_crtc_driver, 345 &vc4_v3d_driver, 346 }; 347 348 static int vc4_platform_drm_probe(struct platform_device *pdev) 349 { 350 struct component_match *match = NULL; 351 struct device *dev = &pdev->dev; 352 353 vc4_match_add_drivers(dev, &match, 354 component_drivers, ARRAY_SIZE(component_drivers)); 355 356 return component_master_add_with_match(dev, &vc4_drm_ops, match); 357 } 358 359 static int vc4_platform_drm_remove(struct platform_device *pdev) 360 { 361 component_master_del(&pdev->dev, &vc4_drm_ops); 362 363 return 0; 364 } 365 366 static const struct of_device_id vc4_of_match[] = { 367 { .compatible = "brcm,bcm2835-vc4", }, 368 { .compatible = "brcm,cygnus-vc4", }, 369 {}, 370 }; 371 MODULE_DEVICE_TABLE(of, vc4_of_match); 372 373 static struct platform_driver vc4_platform_driver = { 374 .probe = vc4_platform_drm_probe, 375 .remove = vc4_platform_drm_remove, 376 .driver = { 377 .name = "vc4-drm", 378 .of_match_table = vc4_of_match, 379 }, 380 }; 381 382 static int __init vc4_drm_register(void) 383 { 384 int ret; 385 386 ret = platform_register_drivers(component_drivers, 387 ARRAY_SIZE(component_drivers)); 388 if (ret) 389 return ret; 390 391 return platform_driver_register(&vc4_platform_driver); 392 } 393 394 static void __exit vc4_drm_unregister(void) 395 { 396 platform_unregister_drivers(component_drivers, 397 ARRAY_SIZE(component_drivers)); 398 platform_driver_unregister(&vc4_platform_driver); 399 } 400 401 module_init(vc4_drm_register); 402 module_exit(vc4_drm_unregister); 403 404 MODULE_ALIAS("platform:vc4-drm"); 405 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); 406 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); 407 MODULE_LICENSE("GPL v2"); 408