drivers/gpu/drm/panfrost/panfrost_drv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
   3 /* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
   4 /* Copyright 2019 Collabora ltd. */
   5
   6 #include <linux/module.h>
   7 #include <linux/of_platform.h>
   8 #include <linux/pagemap.h>
   9 #include <linux/pm_runtime.h>
  10 #include <drm/panfrost_drm.h>
  11 #include <drm/drm_drv.h>
  12 #include <drm/drm_ioctl.h>
  13 #include <drm/drm_syncobj.h>
  14 #include <drm/drm_utils.h>
  15
  16 #include "panfrost_device.h"
  17 #include "panfrost_devfreq.h"
  18 #include "panfrost_gem.h"
  19 #include "panfrost_mmu.h"
  20 #include "panfrost_job.h"
  21 #include "panfrost_gpu.h"
  22 #include "panfrost_perfcnt.h"
  23
  24 static bool unstable_ioctls;
  25 module_param_unsafe(unstable_ioctls, bool, 0600);
  26
  27 static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct drm_file *file)
  28 {
  29         struct drm_panfrost_get_param *param = data;
  30         struct panfrost_device *pfdev = ddev->dev_private;
  31
  32         if (param->pad != 0)
  33                 return -EINVAL;
  34
  35         switch (param->param) {
  36         case DRM_PANFROST_PARAM_GPU_PROD_ID:
  37                 param->value = pfdev->features.id;
  38                 break;
  39         default:
  40                 return -EINVAL;
  41         }
  42
  43         return 0;
  44 }
  45
  46 static int panfrost_ioctl_create_bo(struct drm_device *dev, void *data,
  47                 struct drm_file *file)
  48 {
  49         int ret;
  50         struct drm_gem_shmem_object *shmem;
  51         struct drm_panfrost_create_bo *args = data;
  52
  53         if (!args->size || args->flags || args->pad)
  54                 return -EINVAL;
  55
  56         shmem = drm_gem_shmem_create_with_handle(file, dev, args->size,
  57                                                  &args->handle);
  58         if (IS_ERR(shmem))
  59                 return PTR_ERR(shmem);
  60
  61         ret = panfrost_mmu_map(to_panfrost_bo(&shmem->base));
  62         if (ret)
  63                 goto err_free;
  64
  65         args->offset = to_panfrost_bo(&shmem->base)->node.start << PAGE_SHIFT;
  66
  67         return 0;
  68
  69 err_free:
  70         drm_gem_handle_delete(file, args->handle);
  71         return ret;
  72 }
  73
  74 /**
  75  * panfrost_lookup_bos() - Sets up job->bo[] with the GEM objects
  76  * referenced by the job.
  77  * @dev: DRM device
  78  * @file_priv: DRM file for this fd
  79  * @args: IOCTL args
  80  * @job: job being set up
  81  *
  82  * Resolve handles from userspace to BOs and attach them to job.
  83  *
  84  * Note that this function doesn't need to unreference the BOs on
  85  * failure, because that will happen at panfrost_job_cleanup() time.
  86  */
  87 static int
  88 panfrost_lookup_bos(struct drm_device *dev,
  89                   struct drm_file *file_priv,
  90                   struct drm_panfrost_submit *args,
  91                   struct panfrost_job *job)
  92 {
  93         job->bo_count = args->bo_handle_count;
  94
  95         if (!job->bo_count)
  96                 return 0;
  97
  98         job->implicit_fences = kvmalloc_array(job->bo_count,
  99                                   sizeof(struct dma_fence *),
 100                                   GFP_KERNEL | __GFP_ZERO);
 101         if (!job->implicit_fences)
 102                 return -ENOMEM;
 103
 104         return drm_gem_objects_lookup(file_priv,
 105                                       (void __user *)(uintptr_t)args->bo_handles,
 106                                       job->bo_count, &job->bos);
 107 }
 108
 109 /**
 110  * panfrost_copy_in_sync() - Sets up job->in_fences[] with the sync objects
 111  * referenced by the job.
 112  * @dev: DRM device
 113  * @file_priv: DRM file for this fd
 114  * @args: IOCTL args
 115  * @job: job being set up
 116  *
 117  * Resolve syncobjs from userspace to fences and attach them to job.
 118  *
 119  * Note that this function doesn't need to unreference the fences on
 120  * failure, because that will happen at panfrost_job_cleanup() time.
 121  */
 122 static int
 123 panfrost_copy_in_sync(struct drm_device *dev,
 124                   struct drm_file *file_priv,
 125                   struct drm_panfrost_submit *args,
 126                   struct panfrost_job *job)
 127 {
 128         u32 *handles;
 129         int ret = 0;
 130         int i;
 131
 132         job->in_fence_count = args->in_sync_count;
 133
 134         if (!job->in_fence_count)
 135                 return 0;
 136
 137         job->in_fences = kvmalloc_array(job->in_fence_count,
 138                                         sizeof(struct dma_fence *),
 139                                         GFP_KERNEL | __GFP_ZERO);
 140         if (!job->in_fences) {
 141                 DRM_DEBUG("Failed to allocate job in fences\n");
 142                 return -ENOMEM;
 143         }
 144
 145         handles = kvmalloc_array(job->in_fence_count, sizeof(u32), GFP_KERNEL);
 146         if (!handles) {
 147                 ret = -ENOMEM;
 148                 DRM_DEBUG("Failed to allocate incoming syncobj handles\n");
 149                 goto fail;
 150         }
 151
 152         if (copy_from_user(handles,
 153                            (void __user *)(uintptr_t)args->in_syncs,
 154                            job->in_fence_count * sizeof(u32))) {
 155                 ret = -EFAULT;
 156                 DRM_DEBUG("Failed to copy in syncobj handles\n");
 157                 goto fail;
 158         }
 159
 160         for (i = 0; i < job->in_fence_count; i++) {
 161                 ret = drm_syncobj_find_fence(file_priv, handles[i], 0, 0,
 162                                              &job->in_fences[i]);
 163                 if (ret == -EINVAL)
 164                         goto fail;
 165         }
 166
 167 fail:
 168         kvfree(handles);
 169         return ret;
 170 }
 171
 172 static int panfrost_ioctl_submit(struct drm_device *dev, void *data,
 173                 struct drm_file *file)
 174 {
 175         struct panfrost_device *pfdev = dev->dev_private;
 176         struct drm_panfrost_submit *args = data;
 177         struct drm_syncobj *sync_out = NULL;
 178         struct panfrost_job *job;
 179         int ret = 0;
 180
 181         if (!args->jc)
 182                 return -EINVAL;
 183
 184         if (args->requirements && args->requirements != PANFROST_JD_REQ_FS)
 185                 return -EINVAL;
 186
 187         if (args->out_sync > 0) {
 188                 sync_out = drm_syncobj_find(file, args->out_sync);
 189                 if (!sync_out)
 190                         return -ENODEV;
 191         }
 192
 193         job = kzalloc(sizeof(*job), GFP_KERNEL);
 194         if (!job) {
 195                 ret = -ENOMEM;
 196                 goto fail_out_sync;
 197         }
 198
 199         kref_init(&job->refcount);
 200
 201         job->pfdev = pfdev;
 202         job->jc = args->jc;
 203         job->requirements = args->requirements;
 204         job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev);
 205         job->file_priv = file->driver_priv;
 206
 207         ret = panfrost_copy_in_sync(dev, file, args, job);
 208         if (ret)
 209                 goto fail_job;
 210
 211         ret = panfrost_lookup_bos(dev, file, args, job);
 212         if (ret)
 213                 goto fail_job;
 214
 215         ret = panfrost_job_push(job);
 216         if (ret)
 217                 goto fail_job;
 218
 219         /* Update the return sync object for the job */
 220         if (sync_out)
 221                 drm_syncobj_replace_fence(sync_out, job->render_done_fence);
 222
 223 fail_job:
 224         panfrost_job_put(job);
 225 fail_out_sync:
 226         if (sync_out)
 227                 drm_syncobj_put(sync_out);
 228
 229         return ret;
 230 }
 231
 232 static int
 233 panfrost_ioctl_wait_bo(struct drm_device *dev, void *data,
 234                        struct drm_file *file_priv)
 235 {
 236         long ret;
 237         struct drm_panfrost_wait_bo *args = data;
 238         struct drm_gem_object *gem_obj;
 239         unsigned long timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
 240
 241         if (args->pad)
 242                 return -EINVAL;
 243
 244         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 245         if (!gem_obj)
 246                 return -ENOENT;
 247
 248         ret = reservation_object_wait_timeout_rcu(gem_obj->resv, true,
 249                                                   true, timeout);
 250         if (!ret)
 251                 ret = timeout ? -ETIMEDOUT : -EBUSY;
 252
 253         drm_gem_object_put_unlocked(gem_obj);
 254
 255         return ret;
 256 }
 257
 258 static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
 259                       struct drm_file *file_priv)
 260 {
 261         struct drm_panfrost_mmap_bo *args = data;
 262         struct drm_gem_object *gem_obj;
 263         int ret;
 264
 265         if (args->flags != 0) {
 266                 DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
 267                 return -EINVAL;
 268         }
 269
 270         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 271         if (!gem_obj) {
 272                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 273                 return -ENOENT;
 274         }
 275
 276         ret = drm_gem_create_mmap_offset(gem_obj);
 277         if (ret == 0)
 278                 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
 279         drm_gem_object_put_unlocked(gem_obj);
 280
 281         return ret;
 282 }
 283
 284 static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
 285                             struct drm_file *file_priv)
 286 {
 287         struct drm_panfrost_get_bo_offset *args = data;
 288         struct drm_gem_object *gem_obj;
 289         struct panfrost_gem_object *bo;
 290
 291         gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 292         if (!gem_obj) {
 293                 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
 294                 return -ENOENT;
 295         }
 296         bo = to_panfrost_bo(gem_obj);
 297
 298         args->offset = bo->node.start << PAGE_SHIFT;
 299
 300         drm_gem_object_put_unlocked(gem_obj);
 301         return 0;
 302 }
 303
 304 int panfrost_unstable_ioctl_check(void)
 305 {
 306         if (!unstable_ioctls)
 307                 return -ENOSYS;
 308
 309         return 0;
 310 }
 311
 312 static int
 313 panfrost_open(struct drm_device *dev, struct drm_file *file)
 314 {
 315         struct panfrost_device *pfdev = dev->dev_private;
 316         struct panfrost_file_priv *panfrost_priv;
 317
 318         panfrost_priv = kzalloc(sizeof(*panfrost_priv), GFP_KERNEL);
 319         if (!panfrost_priv)
 320                 return -ENOMEM;
 321
 322         panfrost_priv->pfdev = pfdev;
 323         file->driver_priv = panfrost_priv;
 324
 325         return panfrost_job_open(panfrost_priv);
 326 }
 327
 328 static void
 329 panfrost_postclose(struct drm_device *dev, struct drm_file *file)
 330 {
 331         struct panfrost_file_priv *panfrost_priv = file->driver_priv;
 332
 333         panfrost_perfcnt_close(panfrost_priv);
 334         panfrost_job_close(panfrost_priv);
 335
 336         kfree(panfrost_priv);
 337 }
 338
 339 /* DRM_AUTH is required on SUBMIT for now, while all clients share a single
 340  * address space.  Note that render nodes would be able to submit jobs that
 341  * could access BOs from clients authenticated with the master node.
 342  */
 343 static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 344 #define PANFROST_IOCTL(n, func, flags) \
 345         DRM_IOCTL_DEF_DRV(PANFROST_##n, panfrost_ioctl_##func, flags)
 346
 347         PANFROST_IOCTL(SUBMIT,          submit,         DRM_RENDER_ALLOW | DRM_AUTH),
 348         PANFROST_IOCTL(WAIT_BO,         wait_bo,        DRM_RENDER_ALLOW),
 349         PANFROST_IOCTL(CREATE_BO,       create_bo,      DRM_RENDER_ALLOW),
 350         PANFROST_IOCTL(MMAP_BO,         mmap_bo,        DRM_RENDER_ALLOW),
 351         PANFROST_IOCTL(GET_PARAM,       get_param,      DRM_RENDER_ALLOW),
 352         PANFROST_IOCTL(GET_BO_OFFSET,   get_bo_offset,  DRM_RENDER_ALLOW),
 353         PANFROST_IOCTL(PERFCNT_ENABLE,  perfcnt_enable, DRM_RENDER_ALLOW),
 354         PANFROST_IOCTL(PERFCNT_DUMP,    perfcnt_dump,   DRM_RENDER_ALLOW),
 355 };
 356
 357 DEFINE_DRM_GEM_SHMEM_FOPS(panfrost_drm_driver_fops);
 358
 359 static struct drm_driver panfrost_drm_driver = {
 360         .driver_features        = DRIVER_RENDER | DRIVER_GEM | DRIVER_PRIME |
 361                                   DRIVER_SYNCOBJ,
 362         .open                   = panfrost_open,
 363         .postclose              = panfrost_postclose,
 364         .ioctls                 = panfrost_drm_driver_ioctls,
 365         .num_ioctls             = ARRAY_SIZE(panfrost_drm_driver_ioctls),
 366         .fops                   = &panfrost_drm_driver_fops,
 367         .name                   = "panfrost",
 368         .desc                   = "panfrost DRM",
 369         .date                   = "20180908",
 370         .major                  = 1,
 371         .minor                  = 0,
 372
 373         .gem_create_object      = panfrost_gem_create_object,
 374         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 375         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 376         .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table,
 377         .gem_prime_mmap         = drm_gem_prime_mmap,
 378 };
 379
 380 static int panfrost_probe(struct platform_device *pdev)
 381 {
 382         struct panfrost_device *pfdev;
 383         struct drm_device *ddev;
 384         int err;
 385
 386         pfdev = devm_kzalloc(&pdev->dev, sizeof(*pfdev), GFP_KERNEL);
 387         if (!pfdev)
 388                 return -ENOMEM;
 389
 390         pfdev->pdev = pdev;
 391         pfdev->dev = &pdev->dev;
 392
 393         platform_set_drvdata(pdev, pfdev);
 394
 395         /* Allocate and initialze the DRM device. */
 396         ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev);
 397         if (IS_ERR(ddev))
 398                 return PTR_ERR(ddev);
 399
 400         ddev->dev_private = pfdev;
 401         pfdev->ddev = ddev;
 402
 403         spin_lock_init(&pfdev->mm_lock);
 404
 405         /* 4G enough for now. can be 48-bit */
 406         drm_mm_init(&pfdev->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
 407
 408         pm_runtime_use_autosuspend(pfdev->dev);
 409         pm_runtime_set_autosuspend_delay(pfdev->dev, 50); /* ~3 frames */
 410         pm_runtime_enable(pfdev->dev);
 411
 412         err = panfrost_device_init(pfdev);
 413         if (err) {
 414                 if (err != -EPROBE_DEFER)
 415                         dev_err(&pdev->dev, "Fatal error during GPU init\n");
 416                 goto err_out0;
 417         }
 418
 419         err = panfrost_devfreq_init(pfdev);
 420         if (err) {
 421                 if (err != -EPROBE_DEFER)
 422                         dev_err(&pdev->dev, "Fatal error during devfreq init\n");
 423                 goto err_out1;
 424         }
 425
 426         /*
 427          * Register the DRM device with the core and the connectors with
 428          * sysfs
 429          */
 430         err = drm_dev_register(ddev, 0);
 431         if (err < 0)
 432                 goto err_out1;
 433
 434         return 0;
 435
 436 err_out1:
 437         panfrost_device_fini(pfdev);
 438 err_out0:
 439         pm_runtime_disable(pfdev->dev);
 440         drm_dev_put(ddev);
 441         return err;
 442 }
 443
 444 static int panfrost_remove(struct platform_device *pdev)
 445 {
 446         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 447         struct drm_device *ddev = pfdev->ddev;
 448
 449         drm_dev_unregister(ddev);
 450         pm_runtime_get_sync(pfdev->dev);
 451         pm_runtime_put_sync_autosuspend(pfdev->dev);
 452         pm_runtime_disable(pfdev->dev);
 453         panfrost_device_fini(pfdev);
 454         drm_dev_put(ddev);
 455         return 0;
 456 }
 457
 458 static const struct of_device_id dt_match[] = {
 459         { .compatible = "arm,mali-t604" },
 460         { .compatible = "arm,mali-t624" },
 461         { .compatible = "arm,mali-t628" },
 462         { .compatible = "arm,mali-t720" },
 463         { .compatible = "arm,mali-t760" },
 464         { .compatible = "arm,mali-t820" },
 465         { .compatible = "arm,mali-t830" },
 466         { .compatible = "arm,mali-t860" },
 467         { .compatible = "arm,mali-t880" },
 468         {}
 469 };
 470 MODULE_DEVICE_TABLE(of, dt_match);
 471
 472 static const struct dev_pm_ops panfrost_pm_ops = {
 473         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 474         SET_RUNTIME_PM_OPS(panfrost_device_suspend, panfrost_device_resume, NULL)
 475 };
 476
 477 static struct platform_driver panfrost_driver = {
 478         .probe          = panfrost_probe,
 479         .remove         = panfrost_remove,
 480         .driver         = {
 481                 .name   = "panfrost",
 482                 .pm     = &panfrost_pm_ops,
 483                 .of_match_table = dt_match,
 484         },
 485 };
 486 module_platform_driver(panfrost_driver);
 487
 488 MODULE_AUTHOR("Panfrost Project Developers");
 489 MODULE_DESCRIPTION("Panfrost DRM Driver");
 490 MODULE_LICENSE("GPL v2");