drivers/gpu/drm/v3d/v3d_drv.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright (C) 2014-2018 Broadcom */
   3
   4 /**
   5  * DOC: Broadcom V3D Graphics Driver
   6  *
   7  * This driver supports the Broadcom V3D 3.3 and 4.1 OpenGL ES GPUs.
   8  * For V3D 2.x support, see the VC4 driver.
   9  *
  10  * The V3D GPU includes a tiled render (composed of a bin and render
  11  * pipelines), the TFU (texture formatting unit), and the CSD (compute
  12  * shader dispatch).
  13  */
  14
  15 #include <linux/clk.h>
  16 #include <linux/device.h>
  17 #include <linux/dma-mapping.h>
  18 #include <linux/io.h>
  19 #include <linux/module.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/sched/clock.h>
  23 #include <linux/reset.h>
  24
  25 #include <drm/drm_drv.h>
  26 #include <drm/drm_managed.h>
  27 #include <uapi/drm/v3d_drm.h>
  28
  29 #include "v3d_drv.h"
  30 #include "v3d_regs.h"
  31
  32 #define DRIVER_NAME "v3d"
  33 #define DRIVER_DESC "Broadcom V3D graphics"
  34 #define DRIVER_DATE "20180419"
  35 #define DRIVER_MAJOR 1
  36 #define DRIVER_MINOR 0
  37 #define DRIVER_PATCHLEVEL 0
  38
  39 /* Only expose the `super_pages` modparam if THP is enabled. */
  40 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
  41 bool super_pages = true;
  42 module_param_named(super_pages, super_pages, bool, 0400);
  43 MODULE_PARM_DESC(super_pages, "Enable/Disable Super Pages support.");
  44 #endif
  45
  46 static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
  47                                struct drm_file *file_priv)
  48 {
  49         struct v3d_dev *v3d = to_v3d_dev(dev);
  50         struct drm_v3d_get_param *args = data;
  51         static const u32 reg_map[] = {
  52                 [DRM_V3D_PARAM_V3D_UIFCFG] = V3D_HUB_UIFCFG,
  53                 [DRM_V3D_PARAM_V3D_HUB_IDENT1] = V3D_HUB_IDENT1,
  54                 [DRM_V3D_PARAM_V3D_HUB_IDENT2] = V3D_HUB_IDENT2,
  55                 [DRM_V3D_PARAM_V3D_HUB_IDENT3] = V3D_HUB_IDENT3,
  56                 [DRM_V3D_PARAM_V3D_CORE0_IDENT0] = V3D_CTL_IDENT0,
  57                 [DRM_V3D_PARAM_V3D_CORE0_IDENT1] = V3D_CTL_IDENT1,
  58                 [DRM_V3D_PARAM_V3D_CORE0_IDENT2] = V3D_CTL_IDENT2,
  59         };
  60
  61         if (args->pad != 0)
  62                 return -EINVAL;
  63
  64         /* Note that DRM_V3D_PARAM_V3D_CORE0_IDENT0 is 0, so we need
  65          * to explicitly allow it in the "the register in our
  66          * parameter map" check.
  67          */
  68         if (args->param < ARRAY_SIZE(reg_map) &&
  69             (reg_map[args->param] ||
  70              args->param == DRM_V3D_PARAM_V3D_CORE0_IDENT0)) {
  71                 u32 offset = reg_map[args->param];
  72
  73                 if (args->value != 0)
  74                         return -EINVAL;
  75
  76                 if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
  77                     args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
  78                         args->value = V3D_CORE_READ(0, offset);
  79                 } else {
  80                         args->value = V3D_READ(offset);
  81                 }
  82                 return 0;
  83         }
  84
  85         switch (args->param) {
  86         case DRM_V3D_PARAM_SUPPORTS_TFU:
  87                 args->value = 1;
  88                 return 0;
  89         case DRM_V3D_PARAM_SUPPORTS_CSD:
  90                 args->value = v3d_has_csd(v3d);
  91                 return 0;
  92         case DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH:
  93                 args->value = 1;
  94                 return 0;
  95         case DRM_V3D_PARAM_SUPPORTS_PERFMON:
  96                 args->value = (v3d->ver >= 40);
  97                 return 0;
  98         case DRM_V3D_PARAM_SUPPORTS_MULTISYNC_EXT:
  99                 args->value = 1;
 100                 return 0;
 101         case DRM_V3D_PARAM_SUPPORTS_CPU_QUEUE:
 102                 args->value = 1;
 103                 return 0;
 104         case DRM_V3D_PARAM_MAX_PERF_COUNTERS:
 105                 args->value = v3d->perfmon_info.max_counters;
 106                 return 0;
 107         case DRM_V3D_PARAM_SUPPORTS_SUPER_PAGES:
 108                 args->value = !!v3d->gemfs;
 109                 return 0;
 110         default:
 111                 DRM_DEBUG("Unknown parameter %d\n", args->param);
 112                 return -EINVAL;
 113         }
 114 }
 115
 116 static int
 117 v3d_open(struct drm_device *dev, struct drm_file *file)
 118 {
 119         struct v3d_dev *v3d = to_v3d_dev(dev);
 120         struct v3d_file_priv *v3d_priv;
 121         struct drm_gpu_scheduler *sched;
 122         int i;
 123
 124         v3d_priv = kzalloc(sizeof(*v3d_priv), GFP_KERNEL);
 125         if (!v3d_priv)
 126                 return -ENOMEM;
 127
 128         v3d_priv->v3d = v3d;
 129
 130         for (i = 0; i < V3D_MAX_QUEUES; i++) {
 131                 sched = &v3d->queue[i].sched;
 132                 drm_sched_entity_init(&v3d_priv->sched_entity[i],
 133                                       DRM_SCHED_PRIORITY_NORMAL, &sched,
 134                                       1, NULL);
 135
 136                 memset(&v3d_priv->stats[i], 0, sizeof(v3d_priv->stats[i]));
 137                 seqcount_init(&v3d_priv->stats[i].lock);
 138         }
 139
 140         v3d_perfmon_open_file(v3d_priv);
 141         file->driver_priv = v3d_priv;
 142
 143         return 0;
 144 }
 145
 146 static void
 147 v3d_postclose(struct drm_device *dev, struct drm_file *file)
 148 {
 149         struct v3d_file_priv *v3d_priv = file->driver_priv;
 150         enum v3d_queue q;
 151
 152         for (q = 0; q < V3D_MAX_QUEUES; q++)
 153                 drm_sched_entity_destroy(&v3d_priv->sched_entity[q]);
 154
 155         v3d_perfmon_close_file(v3d_priv);
 156         kfree(v3d_priv);
 157 }
 158
 159 void v3d_get_stats(const struct v3d_stats *stats, u64 timestamp,
 160                    u64 *active_runtime, u64 *jobs_completed)
 161 {
 162         unsigned int seq;
 163
 164         do {
 165                 seq = read_seqcount_begin(&stats->lock);
 166                 *active_runtime = stats->enabled_ns;
 167                 if (stats->start_ns)
 168                         *active_runtime += timestamp - stats->start_ns;
 169                 *jobs_completed = stats->jobs_completed;
 170         } while (read_seqcount_retry(&stats->lock, seq));
 171 }
 172
 173 static void v3d_show_fdinfo(struct drm_printer *p, struct drm_file *file)
 174 {
 175         struct v3d_file_priv *file_priv = file->driver_priv;
 176         u64 timestamp = local_clock();
 177         enum v3d_queue queue;
 178
 179         for (queue = 0; queue < V3D_MAX_QUEUES; queue++) {
 180                 struct v3d_stats *stats = &file_priv->stats[queue];
 181                 u64 active_runtime, jobs_completed;
 182
 183                 v3d_get_stats(stats, timestamp, &active_runtime, &jobs_completed);
 184
 185                 /* Note that, in case of a GPU reset, the time spent during an
 186                  * attempt of executing the job is not computed in the runtime.
 187                  */
 188                 drm_printf(p, "drm-engine-%s: \t%llu ns\n",
 189                            v3d_queue_to_string(queue), active_runtime);
 190
 191                 /* Note that we only count jobs that completed. Therefore, jobs
 192                  * that were resubmitted due to a GPU reset are not computed.
 193                  */
 194                 drm_printf(p, "v3d-jobs-%s: \t%llu jobs\n",
 195                            v3d_queue_to_string(queue), jobs_completed);
 196         }
 197
 198         drm_show_memory_stats(p, file);
 199 }
 200
 201 static const struct file_operations v3d_drm_fops = {
 202         .owner = THIS_MODULE,
 203         DRM_GEM_FOPS,
 204         .show_fdinfo = drm_show_fdinfo,
 205 };
 206
 207 /* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
 208  * protection between clients.  Note that render nodes would be
 209  * able to submit CLs that could access BOs from clients authenticated
 210  * with the master node.  The TFU doesn't use the GMP, so it would
 211  * need to stay DRM_AUTH until we do buffer size/offset validation.
 212  */
 213 static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
 214         DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CL, v3d_submit_cl_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
 215         DRM_IOCTL_DEF_DRV(V3D_WAIT_BO, v3d_wait_bo_ioctl, DRM_RENDER_ALLOW),
 216         DRM_IOCTL_DEF_DRV(V3D_CREATE_BO, v3d_create_bo_ioctl, DRM_RENDER_ALLOW),
 217         DRM_IOCTL_DEF_DRV(V3D_MMAP_BO, v3d_mmap_bo_ioctl, DRM_RENDER_ALLOW),
 218         DRM_IOCTL_DEF_DRV(V3D_GET_PARAM, v3d_get_param_ioctl, DRM_RENDER_ALLOW),
 219         DRM_IOCTL_DEF_DRV(V3D_GET_BO_OFFSET, v3d_get_bo_offset_ioctl, DRM_RENDER_ALLOW),
 220         DRM_IOCTL_DEF_DRV(V3D_SUBMIT_TFU, v3d_submit_tfu_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
 221         DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CSD, v3d_submit_csd_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
 222         DRM_IOCTL_DEF_DRV(V3D_PERFMON_CREATE, v3d_perfmon_create_ioctl, DRM_RENDER_ALLOW),
 223         DRM_IOCTL_DEF_DRV(V3D_PERFMON_DESTROY, v3d_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
 224         DRM_IOCTL_DEF_DRV(V3D_PERFMON_GET_VALUES, v3d_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
 225         DRM_IOCTL_DEF_DRV(V3D_SUBMIT_CPU, v3d_submit_cpu_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
 226         DRM_IOCTL_DEF_DRV(V3D_PERFMON_GET_COUNTER, v3d_perfmon_get_counter_ioctl, DRM_RENDER_ALLOW),
 227 };
 228
 229 static const struct drm_driver v3d_drm_driver = {
 230         .driver_features = (DRIVER_GEM |
 231                             DRIVER_RENDER |
 232                             DRIVER_SYNCOBJ),
 233
 234         .open = v3d_open,
 235         .postclose = v3d_postclose,
 236
 237 #if defined(CONFIG_DEBUG_FS)
 238         .debugfs_init = v3d_debugfs_init,
 239 #endif
 240
 241         .gem_create_object = v3d_create_object,
 242         .gem_prime_import_sg_table = v3d_prime_import_sg_table,
 243
 244         .ioctls = v3d_drm_ioctls,
 245         .num_ioctls = ARRAY_SIZE(v3d_drm_ioctls),
 246         .fops = &v3d_drm_fops,
 247         .show_fdinfo = v3d_show_fdinfo,
 248
 249         .name = DRIVER_NAME,
 250         .desc = DRIVER_DESC,
 251         .date = DRIVER_DATE,
 252         .major = DRIVER_MAJOR,
 253         .minor = DRIVER_MINOR,
 254         .patchlevel = DRIVER_PATCHLEVEL,
 255 };
 256
 257 static const struct of_device_id v3d_of_match[] = {
 258         { .compatible = "brcm,2711-v3d" },
 259         { .compatible = "brcm,2712-v3d" },
 260         { .compatible = "brcm,7268-v3d" },
 261         { .compatible = "brcm,7278-v3d" },
 262         {},
 263 };
 264 MODULE_DEVICE_TABLE(of, v3d_of_match);
 265
 266 static int
 267 map_regs(struct v3d_dev *v3d, void __iomem **regs, const char *name)
 268 {
 269         *regs = devm_platform_ioremap_resource_byname(v3d_to_pdev(v3d), name);
 270         return PTR_ERR_OR_ZERO(*regs);
 271 }
 272
 273 static int v3d_platform_drm_probe(struct platform_device *pdev)
 274 {
 275         struct device *dev = &pdev->dev;
 276         struct drm_device *drm;
 277         struct v3d_dev *v3d;
 278         int ret;
 279         u32 mmu_debug;
 280         u32 ident1, ident3;
 281         u64 mask;
 282
 283         v3d = devm_drm_dev_alloc(dev, &v3d_drm_driver, struct v3d_dev, drm);
 284         if (IS_ERR(v3d))
 285                 return PTR_ERR(v3d);
 286
 287         drm = &v3d->drm;
 288
 289         platform_set_drvdata(pdev, drm);
 290
 291         ret = map_regs(v3d, &v3d->hub_regs, "hub");
 292         if (ret)
 293                 return ret;
 294
 295         ret = map_regs(v3d, &v3d->core_regs[0], "core0");
 296         if (ret)
 297                 return ret;
 298
 299         mmu_debug = V3D_READ(V3D_MMU_DEBUG_INFO);
 300         mask = DMA_BIT_MASK(30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_PA_WIDTH));
 301         ret = dma_set_mask_and_coherent(dev, mask);
 302         if (ret)
 303                 return ret;
 304
 305         v3d->va_width = 30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_VA_WIDTH);
 306
 307         ident1 = V3D_READ(V3D_HUB_IDENT1);
 308         v3d->ver = (V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER) * 10 +
 309                     V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV));
 310         v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
 311         WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
 312
 313         ident3 = V3D_READ(V3D_HUB_IDENT3);
 314         v3d->rev = V3D_GET_FIELD(ident3, V3D_HUB_IDENT3_IPREV);
 315
 316         v3d_perfmon_init(v3d);
 317
 318         v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
 319         if (IS_ERR(v3d->reset)) {
 320                 ret = PTR_ERR(v3d->reset);
 321
 322                 if (ret == -EPROBE_DEFER)
 323                         return ret;
 324
 325                 v3d->reset = NULL;
 326                 ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
 327                 if (ret) {
 328                         dev_err(dev,
 329                                 "Failed to get reset control or bridge regs\n");
 330                         return ret;
 331                 }
 332         }
 333
 334         if (v3d->ver < 41) {
 335                 ret = map_regs(v3d, &v3d->gca_regs, "gca");
 336                 if (ret)
 337                         return ret;
 338         }
 339
 340         v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr,
 341                                         GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO);
 342         if (!v3d->mmu_scratch) {
 343                 dev_err(dev, "Failed to allocate MMU scratch page\n");
 344                 return -ENOMEM;
 345         }
 346
 347         ret = v3d_gem_init(drm);
 348         if (ret)
 349                 goto dma_free;
 350
 351         ret = v3d_irq_init(v3d);
 352         if (ret)
 353                 goto gem_destroy;
 354
 355         ret = drm_dev_register(drm, 0);
 356         if (ret)
 357                 goto irq_disable;
 358
 359         ret = v3d_sysfs_init(dev);
 360         if (ret)
 361                 goto drm_unregister;
 362
 363         return 0;
 364
 365 drm_unregister:
 366         drm_dev_unregister(drm);
 367 irq_disable:
 368         v3d_irq_disable(v3d);
 369 gem_destroy:
 370         v3d_gem_destroy(drm);
 371 dma_free:
 372         dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr);
 373         return ret;
 374 }
 375
 376 static void v3d_platform_drm_remove(struct platform_device *pdev)
 377 {
 378         struct drm_device *drm = platform_get_drvdata(pdev);
 379         struct v3d_dev *v3d = to_v3d_dev(drm);
 380         struct device *dev = &pdev->dev;
 381
 382         v3d_sysfs_destroy(dev);
 383
 384         drm_dev_unregister(drm);
 385
 386         v3d_gem_destroy(drm);
 387
 388         dma_free_wc(v3d->drm.dev, 4096, v3d->mmu_scratch,
 389                     v3d->mmu_scratch_paddr);
 390 }
 391
 392 static struct platform_driver v3d_platform_driver = {
 393         .probe          = v3d_platform_drm_probe,
 394         .remove         = v3d_platform_drm_remove,
 395         .driver         = {
 396                 .name   = "v3d",
 397                 .of_match_table = v3d_of_match,
 398         },
 399 };
 400
 401 module_platform_driver(v3d_platform_driver);
 402
 403 MODULE_ALIAS("platform:v3d-drm");
 404 MODULE_DESCRIPTION("Broadcom V3D DRM Driver");
 405 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 406 MODULE_LICENSE("GPL v2");