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 #include <linux/clk.h>
  11 #include <linux/component.h>
  12 #include <linux/device.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include "drm_fb_cma_helper.h"
  19
  20 #include "uapi/drm/vc4_drm.h"
  21 #include "vc4_drv.h"
  22 #include "vc4_regs.h"
  23
  24 #define DRIVER_NAME "vc4"
  25 #define DRIVER_DESC "Broadcom VC4 graphics"
  26 #define DRIVER_DATE "20140616"
  27 #define DRIVER_MAJOR 0
  28 #define DRIVER_MINOR 0
  29 #define DRIVER_PATCHLEVEL 0
  30
  31 /* Helper function for mapping the regs on a platform device. */
  32 void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
  33 {
  34         struct resource *res;
  35         void __iomem *map;
  36
  37         res = platform_get_resource(dev, IORESOURCE_MEM, index);
  38         map = devm_ioremap_resource(&dev->dev, res);
  39         if (IS_ERR(map)) {
  40                 DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
  41                 return map;
  42         }
  43
  44         return map;
  45 }
  46
  47 static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
  48                                struct drm_file *file_priv)
  49 {
  50         struct vc4_dev *vc4 = to_vc4_dev(dev);
  51         struct drm_vc4_get_param *args = data;
  52         int ret;
  53
  54         if (args->pad != 0)
  55                 return -EINVAL;
  56
  57         switch (args->param) {
  58         case DRM_VC4_PARAM_V3D_IDENT0:
  59                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  60                 if (ret)
  61                         return ret;
  62                 args->value = V3D_READ(V3D_IDENT0);
  63                 pm_runtime_put(&vc4->v3d->pdev->dev);
  64                 break;
  65         case DRM_VC4_PARAM_V3D_IDENT1:
  66                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  67                 if (ret)
  68                         return ret;
  69                 args->value = V3D_READ(V3D_IDENT1);
  70                 pm_runtime_put(&vc4->v3d->pdev->dev);
  71                 break;
  72         case DRM_VC4_PARAM_V3D_IDENT2:
  73                 ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
  74                 if (ret)
  75                         return ret;
  76                 args->value = V3D_READ(V3D_IDENT2);
  77                 pm_runtime_put(&vc4->v3d->pdev->dev);
  78                 break;
  79         case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
  80                 args->value = true;
  81                 break;
  82         default:
  83                 DRM_DEBUG("Unknown parameter %d\n", args->param);
  84                 return -EINVAL;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static void vc4_lastclose(struct drm_device *dev)
  91 {
  92         struct vc4_dev *vc4 = to_vc4_dev(dev);
  93
  94         drm_fbdev_cma_restore_mode(vc4->fbdev);
  95 }
  96
  97 static const struct file_operations vc4_drm_fops = {
  98         .owner = THIS_MODULE,
  99         .open = drm_open,
 100         .release = drm_release,
 101         .unlocked_ioctl = drm_ioctl,
 102         .mmap = vc4_mmap,
 103         .poll = drm_poll,
 104         .read = drm_read,
 105 #ifdef CONFIG_COMPAT
 106         .compat_ioctl = drm_compat_ioctl,
 107 #endif
 108         .llseek = noop_llseek,
 109 };
 110
 111 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 112         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 113         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 114         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 115         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 116         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 117         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 118         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 119                           DRM_ROOT_ONLY),
 120         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 121 };
 122
 123 static struct drm_driver vc4_drm_driver = {
 124         .driver_features = (DRIVER_MODESET |
 125                             DRIVER_ATOMIC |
 126                             DRIVER_GEM |
 127                             DRIVER_HAVE_IRQ |
 128                             DRIVER_RENDER |
 129                             DRIVER_PRIME),
 130         .lastclose = vc4_lastclose,
 131         .irq_handler = vc4_irq,
 132         .irq_preinstall = vc4_irq_preinstall,
 133         .irq_postinstall = vc4_irq_postinstall,
 134         .irq_uninstall = vc4_irq_uninstall,
 135
 136         .enable_vblank = vc4_enable_vblank,
 137         .disable_vblank = vc4_disable_vblank,
 138         .get_vblank_counter = drm_vblank_no_hw_counter,
 139         .get_scanout_position = vc4_crtc_get_scanoutpos,
 140         .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
 141
 142 #if defined(CONFIG_DEBUG_FS)
 143         .debugfs_init = vc4_debugfs_init,
 144         .debugfs_cleanup = vc4_debugfs_cleanup,
 145 #endif
 146
 147         .gem_create_object = vc4_create_object,
 148         .gem_free_object_unlocked = vc4_free_object,
 149         .gem_vm_ops = &drm_gem_cma_vm_ops,
 150
 151         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 152         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 153         .gem_prime_import = drm_gem_prime_import,
 154         .gem_prime_export = vc4_prime_export,
 155         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 156         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 157         .gem_prime_vmap = vc4_prime_vmap,
 158         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 159         .gem_prime_mmap = vc4_prime_mmap,
 160
 161         .dumb_create = vc4_dumb_create,
 162         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 163         .dumb_destroy = drm_gem_dumb_destroy,
 164
 165         .ioctls = vc4_drm_ioctls,
 166         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 167         .fops = &vc4_drm_fops,
 168
 169         .name = DRIVER_NAME,
 170         .desc = DRIVER_DESC,
 171         .date = DRIVER_DATE,
 172         .major = DRIVER_MAJOR,
 173         .minor = DRIVER_MINOR,
 174         .patchlevel = DRIVER_PATCHLEVEL,
 175 };
 176
 177 static int compare_dev(struct device *dev, void *data)
 178 {
 179         return dev == data;
 180 }
 181
 182 static void vc4_match_add_drivers(struct device *dev,
 183                                   struct component_match **match,
 184                                   struct platform_driver *const *drivers,
 185                                   int count)
 186 {
 187         int i;
 188
 189         for (i = 0; i < count; i++) {
 190                 struct device_driver *drv = &drivers[i]->driver;
 191                 struct device *p = NULL, *d;
 192
 193                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 194                                             (void *)platform_bus_type.match))) {
 195                         put_device(p);
 196                         component_match_add(dev, match, compare_dev, d);
 197                         p = d;
 198                 }
 199                 put_device(p);
 200         }
 201 }
 202
 203 static void vc4_kick_out_firmware_fb(void)
 204 {
 205         struct apertures_struct *ap;
 206
 207         ap = alloc_apertures(1);
 208         if (!ap)
 209                 return;
 210
 211         /* Since VC4 is a UMA device, the simplefb node may have been
 212          * located anywhere in memory.
 213          */
 214         ap->ranges[0].base = 0;
 215         ap->ranges[0].size = ~0;
 216
 217         remove_conflicting_framebuffers(ap, "vc4drmfb", false);
 218         kfree(ap);
 219 }
 220
 221 static int vc4_drm_bind(struct device *dev)
 222 {
 223         struct platform_device *pdev = to_platform_device(dev);
 224         struct drm_device *drm;
 225         struct vc4_dev *vc4;
 226         int ret = 0;
 227
 228         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 229
 230         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 231         if (!vc4)
 232                 return -ENOMEM;
 233
 234         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 235         if (!drm)
 236                 return -ENOMEM;
 237         platform_set_drvdata(pdev, drm);
 238         vc4->dev = drm;
 239         drm->dev_private = vc4;
 240
 241         vc4_bo_cache_init(drm);
 242
 243         drm_mode_config_init(drm);
 244
 245         vc4_gem_init(drm);
 246
 247         ret = component_bind_all(dev, drm);
 248         if (ret)
 249                 goto gem_destroy;
 250
 251         vc4_kick_out_firmware_fb();
 252
 253         ret = drm_dev_register(drm, 0);
 254         if (ret < 0)
 255                 goto unbind_all;
 256
 257         vc4_kms_load(drm);
 258
 259         return 0;
 260
 261 unbind_all:
 262         component_unbind_all(dev, drm);
 263 gem_destroy:
 264         vc4_gem_destroy(drm);
 265         drm_dev_unref(drm);
 266         vc4_bo_cache_destroy(drm);
 267         return ret;
 268 }
 269
 270 static void vc4_drm_unbind(struct device *dev)
 271 {
 272         struct platform_device *pdev = to_platform_device(dev);
 273         struct drm_device *drm = platform_get_drvdata(pdev);
 274         struct vc4_dev *vc4 = to_vc4_dev(drm);
 275
 276         if (vc4->fbdev)
 277                 drm_fbdev_cma_fini(vc4->fbdev);
 278
 279         drm_mode_config_cleanup(drm);
 280
 281         drm_put_dev(drm);
 282 }
 283
 284 static const struct component_master_ops vc4_drm_ops = {
 285         .bind = vc4_drm_bind,
 286         .unbind = vc4_drm_unbind,
 287 };
 288
 289 static struct platform_driver *const component_drivers[] = {
 290         &vc4_hdmi_driver,
 291         &vc4_dpi_driver,
 292         &vc4_hvs_driver,
 293         &vc4_crtc_driver,
 294         &vc4_v3d_driver,
 295 };
 296
 297 static int vc4_platform_drm_probe(struct platform_device *pdev)
 298 {
 299         struct component_match *match = NULL;
 300         struct device *dev = &pdev->dev;
 301
 302         vc4_match_add_drivers(dev, &match,
 303                               component_drivers, ARRAY_SIZE(component_drivers));
 304
 305         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 306 }
 307
 308 static int vc4_platform_drm_remove(struct platform_device *pdev)
 309 {
 310         component_master_del(&pdev->dev, &vc4_drm_ops);
 311
 312         return 0;
 313 }
 314
 315 static const struct of_device_id vc4_of_match[] = {
 316         { .compatible = "brcm,bcm2835-vc4", },
 317         {},
 318 };
 319 MODULE_DEVICE_TABLE(of, vc4_of_match);
 320
 321 static struct platform_driver vc4_platform_driver = {
 322         .probe          = vc4_platform_drm_probe,
 323         .remove         = vc4_platform_drm_remove,
 324         .driver         = {
 325                 .name   = "vc4-drm",
 326                 .of_match_table = vc4_of_match,
 327         },
 328 };
 329
 330 static int __init vc4_drm_register(void)
 331 {
 332         int i, ret;
 333
 334         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 335                 ret = platform_driver_register(component_drivers[i]);
 336                 if (ret) {
 337                         while (--i >= 0)
 338                                 platform_driver_unregister(component_drivers[i]);
 339                         return ret;
 340                 }
 341         }
 342         return platform_driver_register(&vc4_platform_driver);
 343 }
 344
 345 static void __exit vc4_drm_unregister(void)
 346 {
 347         int i;
 348
 349         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 350                 platform_driver_unregister(component_drivers[i]);
 351
 352         platform_driver_unregister(&vc4_platform_driver);
 353 }
 354
 355 module_init(vc4_drm_register);
 356 module_exit(vc4_drm_unregister);
 357
 358 MODULE_ALIAS("platform:vc4-drm");
 359 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 360 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 361 MODULE_LICENSE("GPL v2");