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/dma-mapping.h>
  27 #include <linux/io.h>
  28 #include <linux/module.h>
  29 #include <linux/of_platform.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/pm_runtime.h>
  32
  33 #include <drm/drm_atomic_helper.h>
  34 #include <drm/drm_drv.h>
  35 #include <drm/drm_fb_cma_helper.h>
  36 #include <drm/drm_fb_helper.h>
  37 #include <drm/drm_vblank.h>
  38
  39 #include "uapi/drm/vc4_drm.h"
  40
  41 #include "vc4_drv.h"
  42 #include "vc4_regs.h"
  43
  44 #define DRIVER_NAME "vc4"
  45 #define DRIVER_DESC "Broadcom VC4 graphics"
  46 #define DRIVER_DATE "20140616"
  47 #define DRIVER_MAJOR 0
  48 #define DRIVER_MINOR 0
  49 #define DRIVER_PATCHLEVEL 0
  50
  51 /* Helper function for mapping the regs on a platform device. */
  52 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  53 {
  54         struct resource *res;
  55         void __iomem *map;
  56
  57         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  58         map = devm_ioremap_resource(&dev->dev, res);
  59         if (IS_ERR(map)) {
  60                 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  61                 return map;
  62         }
  63
  64         return map;
  65 }
  66
  67 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  68                                struct drm_file *file_priv)
  69 {
  70         struct vc4_dev *vc4 = to_vc4_dev(dev);
  71         struct drm_vc4_get_param *args = data;
  72         int ret;
  73
  74         if (args->pad != 0)
  75                 return -EINVAL;
  76
  77         if (!vc4->v3d)
  78                 return -ENODEV;
  79
  80         switch (args->param) {
  81         case DRM_VC4_PARAM_V3D_IDENT0:
  82                 ret = vc4_v3d_pm_get(vc4);
  83                 if (ret)
  84                         return ret;
  85                 args->value = V3D_READ(V3D_IDENT0);
  86                 vc4_v3d_pm_put(vc4);
  87                 break;
  88         case DRM_VC4_PARAM_V3D_IDENT1:
  89                 ret = vc4_v3d_pm_get(vc4);
  90                 if (ret)
  91                         return ret;
  92                 args->value = V3D_READ(V3D_IDENT1);
  93                 vc4_v3d_pm_put(vc4);
  94                 break;
  95         case DRM_VC4_PARAM_V3D_IDENT2:
  96                 ret = vc4_v3d_pm_get(vc4);
  97                 if (ret)
  98                         return ret;
  99                 args->value = V3D_READ(V3D_IDENT2);
 100                 vc4_v3d_pm_put(vc4);
 101                 break;
 102         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
 103         case DRM_VC4_PARAM_SUPPORTS_ETC1:
 104         case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
 105         case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
 106         case DRM_VC4_PARAM_SUPPORTS_MADVISE:
 107         case DRM_VC4_PARAM_SUPPORTS_PERFMON:
 108                 args->value = true;
 109                 break;
 110         default:
 111                 DRM_DEBUG("Unknown parameter %d\n", args->param);
 112                 return -EINVAL;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int vc4_open(struct drm_device *dev, struct drm_file *file)
 119 {
 120         struct vc4_file *vc4file;
 121
 122         vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
 123         if (!vc4file)
 124                 return -ENOMEM;
 125
 126         vc4_perfmon_open_file(vc4file);
 127         file->driver_priv = vc4file;
 128         return 0;
 129 }
 130
 131 static void vc4_close(struct drm_device *dev, struct drm_file *file)
 132 {
 133         struct vc4_dev *vc4 = to_vc4_dev(dev);
 134         struct vc4_file *vc4file = file->driver_priv;
 135
 136         if (vc4file->bin_bo_used)
 137                 vc4_v3d_bin_bo_put(vc4);
 138
 139         vc4_perfmon_close_file(vc4file);
 140         kfree(vc4file);
 141 }
 142
 143 static const struct vm_operations_struct vc4_vm_ops = {
 144         .fault = vc4_fault,
 145         .open = drm_gem_vm_open,
 146         .close = drm_gem_vm_close,
 147 };
 148
 149 static const struct file_operations vc4_drm_fops = {
 150         .owner = THIS_MODULE,
 151         .open = drm_open,
 152         .release = drm_release,
 153         .unlocked_ioctl = drm_ioctl,
 154         .mmap = vc4_mmap,
 155         .poll = drm_poll,
 156         .read = drm_read,
 157         .compat_ioctl = drm_compat_ioctl,
 158         .llseek = noop_llseek,
 159 };
 160
 161 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 162         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 163         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 164         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 165         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 166         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 167         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 168         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 169                           DRM_ROOT_ONLY),
 170         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 171         DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
 172         DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
 173         DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
 174         DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
 175         DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
 176         DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
 177         DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
 178 };
 179
 180 static struct drm_driver vc4_drm_driver = {
 181         .driver_features = (DRIVER_MODESET |
 182                             DRIVER_ATOMIC |
 183                             DRIVER_GEM |
 184                             DRIVER_RENDER |
 185                             DRIVER_SYNCOBJ),
 186         .open = vc4_open,
 187         .postclose = vc4_close,
 188         .irq_handler = vc4_irq,
 189         .irq_preinstall = vc4_irq_preinstall,
 190         .irq_postinstall = vc4_irq_postinstall,
 191         .irq_uninstall = vc4_irq_uninstall,
 192
 193         .get_scanout_position = vc4_crtc_get_scanoutpos,
 194         .get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos,
 195
 196 #if defined(CONFIG_DEBUG_FS)
 197         .debugfs_init = vc4_debugfs_init,
 198 #endif
 199
 200         .gem_create_object = vc4_create_object,
 201         .gem_free_object_unlocked = vc4_free_object,
 202         .gem_vm_ops = &vc4_vm_ops,
 203
 204         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 205         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 206         .gem_prime_export = vc4_prime_export,
 207         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 208         .gem_prime_import_sg_table = vc4_prime_import_sg_table,
 209         .gem_prime_vmap = vc4_prime_vmap,
 210         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 211         .gem_prime_mmap = vc4_prime_mmap,
 212
 213         .dumb_create = vc4_dumb_create,
 214
 215         .ioctls = vc4_drm_ioctls,
 216         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 217         .fops = &vc4_drm_fops,
 218
 219         .name = DRIVER_NAME,
 220         .desc = DRIVER_DESC,
 221         .date = DRIVER_DATE,
 222         .major = DRIVER_MAJOR,
 223         .minor = DRIVER_MINOR,
 224         .patchlevel = DRIVER_PATCHLEVEL,
 225 };
 226
 227 static int compare_dev(struct device *dev, void *data)
 228 {
 229         return dev == data;
 230 }
 231
 232 static void vc4_match_add_drivers(struct device *dev,
 233                                   struct component_match **match,
 234                                   struct platform_driver *const *drivers,
 235                                   int count)
 236 {
 237         int i;
 238
 239         for (i = 0; i < count; i++) {
 240                 struct device_driver *drv = &drivers[i]->driver;
 241                 struct device *p = NULL, *d;
 242
 243                 while ((d = platform_find_device_by_driver(p, drv))) {
 244                         put_device(p);
 245                         component_match_add(dev, match, compare_dev, d);
 246                         p = d;
 247                 }
 248                 put_device(p);
 249         }
 250 }
 251
 252 static int vc4_drm_bind(struct device *dev)
 253 {
 254         struct platform_device *pdev = to_platform_device(dev);
 255         struct drm_device *drm;
 256         struct vc4_dev *vc4;
 257         struct device_node *node;
 258         int ret = 0;
 259
 260         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 261
 262         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 263         if (!vc4)
 264                 return -ENOMEM;
 265
 266         /* If VC4 V3D is missing, don't advertise render nodes. */
 267         node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
 268         if (!node || !of_device_is_available(node))
 269                 vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
 270         of_node_put(node);
 271
 272         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 273         if (IS_ERR(drm))
 274                 return PTR_ERR(drm);
 275         platform_set_drvdata(pdev, drm);
 276         vc4->dev = drm;
 277         drm->dev_private = vc4;
 278         INIT_LIST_HEAD(&vc4->debugfs_list);
 279
 280         mutex_init(&vc4->bin_bo_lock);
 281
 282         ret = vc4_bo_cache_init(drm);
 283         if (ret)
 284                 goto dev_put;
 285
 286         drm_mode_config_init(drm);
 287
 288         vc4_gem_init(drm);
 289
 290         ret = component_bind_all(dev, drm);
 291         if (ret)
 292                 goto gem_destroy;
 293
 294         drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
 295
 296         ret = vc4_kms_load(drm);
 297         if (ret < 0)
 298                 goto unbind_all;
 299
 300         ret = drm_dev_register(drm, 0);
 301         if (ret < 0)
 302                 goto unbind_all;
 303
 304         drm_fbdev_generic_setup(drm, 16);
 305
 306         return 0;
 307
 308 unbind_all:
 309         component_unbind_all(dev, drm);
 310 gem_destroy:
 311         vc4_gem_destroy(drm);
 312         vc4_bo_cache_destroy(drm);
 313 dev_put:
 314         drm_dev_put(drm);
 315         return ret;
 316 }
 317
 318 static void vc4_drm_unbind(struct device *dev)
 319 {
 320         struct drm_device *drm = dev_get_drvdata(dev);
 321         struct vc4_dev *vc4 = to_vc4_dev(drm);
 322
 323         drm_dev_unregister(drm);
 324
 325         drm_atomic_helper_shutdown(drm);
 326
 327         drm_mode_config_cleanup(drm);
 328
 329         drm_atomic_private_obj_fini(&vc4->load_tracker);
 330         drm_atomic_private_obj_fini(&vc4->ctm_manager);
 331
 332         drm_dev_put(drm);
 333 }
 334
 335 static const struct component_master_ops vc4_drm_ops = {
 336         .bind = vc4_drm_bind,
 337         .unbind = vc4_drm_unbind,
 338 };
 339
 340 static struct platform_driver *const component_drivers[] = {
 341         &vc4_hdmi_driver,
 342         &vc4_vec_driver,
 343         &vc4_dpi_driver,
 344         &vc4_dsi_driver,
 345         &vc4_txp_driver,
 346         &vc4_hvs_driver,
 347         &vc4_crtc_driver,
 348         &vc4_v3d_driver,
 349 };
 350
 351 static int vc4_platform_drm_probe(struct platform_device *pdev)
 352 {
 353         struct component_match *match = NULL;
 354         struct device *dev = &pdev->dev;
 355
 356         vc4_match_add_drivers(dev, &match,
 357                               component_drivers, ARRAY_SIZE(component_drivers));
 358
 359         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 360 }
 361
 362 static int vc4_platform_drm_remove(struct platform_device *pdev)
 363 {
 364         component_master_del(&pdev->dev, &vc4_drm_ops);
 365
 366         return 0;
 367 }
 368
 369 static const struct of_device_id vc4_of_match[] = {
 370         { .compatible = "brcm,bcm2835-vc4", },
 371         { .compatible = "brcm,cygnus-vc4", },
 372         {},
 373 };
 374 MODULE_DEVICE_TABLE(of, vc4_of_match);
 375
 376 static struct platform_driver vc4_platform_driver = {
 377         .probe          = vc4_platform_drm_probe,
 378         .remove         = vc4_platform_drm_remove,
 379         .driver         = {
 380                 .name   = "vc4-drm",
 381                 .of_match_table = vc4_of_match,
 382         },
 383 };
 384
 385 static int __init vc4_drm_register(void)
 386 {
 387         int ret;
 388
 389         ret = platform_register_drivers(component_drivers,
 390                                         ARRAY_SIZE(component_drivers));
 391         if (ret)
 392                 return ret;
 393
 394         return platform_driver_register(&vc4_platform_driver);
 395 }
 396
 397 static void __exit vc4_drm_unregister(void)
 398 {
 399         platform_unregister_drivers(component_drivers,
 400                                     ARRAY_SIZE(component_drivers));
 401         platform_driver_unregister(&vc4_platform_driver);
 402 }
 403
 404 module_init(vc4_drm_register);
 405 module_exit(vc4_drm_unregister);
 406
 407 MODULE_ALIAS("platform:vc4-drm");
 408 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 409 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 410 MODULE_LICENSE("GPL v2");