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