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
  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");