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         default:
  80                 DRM_DEBUG("Unknown parameter %d\n", args->param);
  81                 return -EINVAL;
  82         }
  83
  84         return 0;
  85 }
  86
  87 static void vc4_lastclose(struct drm_device *dev)
  88 {
  89         struct vc4_dev *vc4 = to_vc4_dev(dev);
  90
  91         if (vc4->fbdev)
  92                 drm_fbdev_cma_restore_mode(vc4->fbdev);
  93 }
  94
  95 static const struct file_operations vc4_drm_fops = {
  96         .owner = THIS_MODULE,
  97         .open = drm_open,
  98         .release = drm_release,
  99         .unlocked_ioctl = drm_ioctl,
 100         .mmap = vc4_mmap,
 101         .poll = drm_poll,
 102         .read = drm_read,
 103 #ifdef CONFIG_COMPAT
 104         .compat_ioctl = drm_compat_ioctl,
 105 #endif
 106         .llseek = noop_llseek,
 107 };
 108
 109 static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
 110         DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
 111         DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
 112         DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
 113         DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
 114         DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 115         DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
 116         DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
 117                           DRM_ROOT_ONLY),
 118         DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
 119 };
 120
 121 static struct drm_driver vc4_drm_driver = {
 122         .driver_features = (DRIVER_MODESET |
 123                             DRIVER_ATOMIC |
 124                             DRIVER_GEM |
 125                             DRIVER_HAVE_IRQ |
 126                             DRIVER_RENDER |
 127                             DRIVER_PRIME),
 128         .lastclose = vc4_lastclose,
 129         .irq_handler = vc4_irq,
 130         .irq_preinstall = vc4_irq_preinstall,
 131         .irq_postinstall = vc4_irq_postinstall,
 132         .irq_uninstall = vc4_irq_uninstall,
 133
 134         .enable_vblank = vc4_enable_vblank,
 135         .disable_vblank = vc4_disable_vblank,
 136         .get_vblank_counter = drm_vblank_no_hw_counter,
 137         .get_scanout_position = vc4_crtc_get_scanoutpos,
 138         .get_vblank_timestamp = vc4_crtc_get_vblank_timestamp,
 139
 140 #if defined(CONFIG_DEBUG_FS)
 141         .debugfs_init = vc4_debugfs_init,
 142         .debugfs_cleanup = vc4_debugfs_cleanup,
 143 #endif
 144
 145         .gem_create_object = vc4_create_object,
 146         .gem_free_object = vc4_free_object,
 147         .gem_vm_ops = &drm_gem_cma_vm_ops,
 148
 149         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 150         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 151         .gem_prime_import = drm_gem_prime_import,
 152         .gem_prime_export = vc4_prime_export,
 153         .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
 154         .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
 155         .gem_prime_vmap = vc4_prime_vmap,
 156         .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
 157         .gem_prime_mmap = vc4_prime_mmap,
 158
 159         .dumb_create = vc4_dumb_create,
 160         .dumb_map_offset = drm_gem_cma_dumb_map_offset,
 161         .dumb_destroy = drm_gem_dumb_destroy,
 162
 163         .ioctls = vc4_drm_ioctls,
 164         .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
 165         .fops = &vc4_drm_fops,
 166
 167         .name = DRIVER_NAME,
 168         .desc = DRIVER_DESC,
 169         .date = DRIVER_DATE,
 170         .major = DRIVER_MAJOR,
 171         .minor = DRIVER_MINOR,
 172         .patchlevel = DRIVER_PATCHLEVEL,
 173 };
 174
 175 static int compare_dev(struct device *dev, void *data)
 176 {
 177         return dev == data;
 178 }
 179
 180 static void vc4_match_add_drivers(struct device *dev,
 181                                   struct component_match **match,
 182                                   struct platform_driver *const *drivers,
 183                                   int count)
 184 {
 185         int i;
 186
 187         for (i = 0; i < count; i++) {
 188                 struct device_driver *drv = &drivers[i]->driver;
 189                 struct device *p = NULL, *d;
 190
 191                 while ((d = bus_find_device(&platform_bus_type, p, drv,
 192                                             (void *)platform_bus_type.match))) {
 193                         put_device(p);
 194                         component_match_add(dev, match, compare_dev, d);
 195                         p = d;
 196                 }
 197                 put_device(p);
 198         }
 199 }
 200
 201 static void vc4_kick_out_firmware_fb(void)
 202 {
 203         struct apertures_struct *ap;
 204
 205         ap = alloc_apertures(1);
 206         if (!ap)
 207                 return;
 208
 209         /* Since VC4 is a UMA device, the simplefb node may have been
 210          * located anywhere in memory.
 211          */
 212         ap->ranges[0].base = 0;
 213         ap->ranges[0].size = ~0;
 214
 215         remove_conflicting_framebuffers(ap, "vc4drmfb", false);
 216         kfree(ap);
 217 }
 218
 219 static int vc4_drm_bind(struct device *dev)
 220 {
 221         struct platform_device *pdev = to_platform_device(dev);
 222         struct drm_device *drm;
 223         struct drm_connector *connector;
 224         struct vc4_dev *vc4;
 225         int ret = 0;
 226
 227         dev->coherent_dma_mask = DMA_BIT_MASK(32);
 228
 229         vc4 = devm_kzalloc(dev, sizeof(*vc4), GFP_KERNEL);
 230         if (!vc4)
 231                 return -ENOMEM;
 232
 233         drm = drm_dev_alloc(&vc4_drm_driver, dev);
 234         if (!drm)
 235                 return -ENOMEM;
 236         platform_set_drvdata(pdev, drm);
 237         vc4->dev = drm;
 238         drm->dev_private = vc4;
 239
 240         vc4_bo_cache_init(drm);
 241
 242         drm_mode_config_init(drm);
 243
 244         vc4_gem_init(drm);
 245
 246         ret = component_bind_all(dev, drm);
 247         if (ret)
 248                 goto gem_destroy;
 249
 250         vc4_kick_out_firmware_fb();
 251
 252         ret = drm_dev_register(drm, 0);
 253         if (ret < 0)
 254                 goto unbind_all;
 255
 256         /* Connector registration has to occur after DRM device
 257          * registration, because it creates sysfs entries based on the
 258          * DRM device.
 259          */
 260         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 261                 ret = drm_connector_register(connector);
 262                 if (ret)
 263                         goto unregister;
 264         }
 265
 266         vc4_kms_load(drm);
 267
 268         return 0;
 269
 270 unregister:
 271         drm_dev_unregister(drm);
 272 unbind_all:
 273         component_unbind_all(dev, drm);
 274 gem_destroy:
 275         vc4_gem_destroy(drm);
 276         drm_dev_unref(drm);
 277         vc4_bo_cache_destroy(drm);
 278         return ret;
 279 }
 280
 281 static void vc4_drm_unbind(struct device *dev)
 282 {
 283         struct platform_device *pdev = to_platform_device(dev);
 284         struct drm_device *drm = platform_get_drvdata(pdev);
 285         struct vc4_dev *vc4 = to_vc4_dev(drm);
 286
 287         if (vc4->fbdev)
 288                 drm_fbdev_cma_fini(vc4->fbdev);
 289
 290         drm_mode_config_cleanup(drm);
 291
 292         drm_put_dev(drm);
 293 }
 294
 295 static const struct component_master_ops vc4_drm_ops = {
 296         .bind = vc4_drm_bind,
 297         .unbind = vc4_drm_unbind,
 298 };
 299
 300 static struct platform_driver *const component_drivers[] = {
 301         &vc4_hdmi_driver,
 302         &vc4_dpi_driver,
 303         &vc4_hvs_driver,
 304         &vc4_crtc_driver,
 305         &vc4_v3d_driver,
 306 };
 307
 308 static int vc4_platform_drm_probe(struct platform_device *pdev)
 309 {
 310         struct component_match *match = NULL;
 311         struct device *dev = &pdev->dev;
 312
 313         vc4_match_add_drivers(dev, &match,
 314                               component_drivers, ARRAY_SIZE(component_drivers));
 315
 316         return component_master_add_with_match(dev, &vc4_drm_ops, match);
 317 }
 318
 319 static int vc4_platform_drm_remove(struct platform_device *pdev)
 320 {
 321         component_master_del(&pdev->dev, &vc4_drm_ops);
 322
 323         return 0;
 324 }
 325
 326 static const struct of_device_id vc4_of_match[] = {
 327         { .compatible = "brcm,bcm2835-vc4", },
 328         {},
 329 };
 330 MODULE_DEVICE_TABLE(of, vc4_of_match);
 331
 332 static struct platform_driver vc4_platform_driver = {
 333         .probe          = vc4_platform_drm_probe,
 334         .remove         = vc4_platform_drm_remove,
 335         .driver         = {
 336                 .name   = "vc4-drm",
 337                 .of_match_table = vc4_of_match,
 338         },
 339 };
 340
 341 static int __init vc4_drm_register(void)
 342 {
 343         int i, ret;
 344
 345         for (i = 0; i < ARRAY_SIZE(component_drivers); i++) {
 346                 ret = platform_driver_register(component_drivers[i]);
 347                 if (ret) {
 348                         while (--i >= 0)
 349                                 platform_driver_unregister(component_drivers[i]);
 350                         return ret;
 351                 }
 352         }
 353         return platform_driver_register(&vc4_platform_driver);
 354 }
 355
 356 static void __exit vc4_drm_unregister(void)
 357 {
 358         int i;
 359
 360         for (i = ARRAY_SIZE(component_drivers) - 1; i >= 0; i--)
 361                 platform_driver_unregister(component_drivers[i]);
 362
 363         platform_driver_unregister(&vc4_platform_driver);
 364 }
 365
 366 module_init(vc4_drm_register);
 367 module_exit(vc4_drm_unregister);
 368
 369 MODULE_ALIAS("platform:vc4-drm");
 370 MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
 371 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 372 MODULE_LICENSE("GPL v2");