drivers/gpu/drm/vc4/vc4_drv.c

   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");