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