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