drivers/gpu/drm/vc4/vc4_drv.c

   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 <[email protected]>");
 405 MODULE_LICENSE("GPL v2");