drivers/gpu/drm/tegra/gr3d.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Avionic Design GmbH
   4  * Copyright (C) 2013 NVIDIA Corporation
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/delay.h>
   9 #include <linux/host1x.h>
  10 #include <linux/iommu.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/pm_domain.h>
  15 #include <linux/pm_opp.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/reset.h>
  18
  19 #include <soc/tegra/common.h>
  20 #include <soc/tegra/pmc.h>
  21
  22 #include "drm.h"
  23 #include "gem.h"
  24 #include "gr3d.h"
  25
  26 enum {
  27         RST_MC,
  28         RST_GR3D,
  29         RST_MC2,
  30         RST_GR3D2,
  31         RST_GR3D_MAX,
  32 };
  33
  34 struct gr3d_soc {
  35         unsigned int version;
  36         unsigned int num_clocks;
  37         unsigned int num_resets;
  38 };
  39
  40 struct gr3d {
  41         struct tegra_drm_client client;
  42         struct host1x_channel *channel;
  43
  44         const struct gr3d_soc *soc;
  45         struct clk_bulk_data *clocks;
  46         unsigned int nclocks;
  47         struct reset_control_bulk_data resets[RST_GR3D_MAX];
  48         unsigned int nresets;
  49         struct dev_pm_domain_list *pd_list;
  50
  51         DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
  52 };
  53
  54 static inline struct gr3d *to_gr3d(struct tegra_drm_client *client)
  55 {
  56         return container_of(client, struct gr3d, client);
  57 }
  58
  59 static int gr3d_init(struct host1x_client *client)
  60 {
  61         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  62         struct drm_device *dev = dev_get_drvdata(client->host);
  63         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
  64         struct gr3d *gr3d = to_gr3d(drm);
  65         int err;
  66
  67         gr3d->channel = host1x_channel_request(client);
  68         if (!gr3d->channel)
  69                 return -ENOMEM;
  70
  71         client->syncpts[0] = host1x_syncpt_request(client, flags);
  72         if (!client->syncpts[0]) {
  73                 err = -ENOMEM;
  74                 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
  75                 goto put;
  76         }
  77
  78         err = host1x_client_iommu_attach(client);
  79         if (err < 0) {
  80                 dev_err(client->dev, "failed to attach to domain: %d\n", err);
  81                 goto free;
  82         }
  83
  84         err = tegra_drm_register_client(dev->dev_private, drm);
  85         if (err < 0) {
  86                 dev_err(client->dev, "failed to register client: %d\n", err);
  87                 goto detach_iommu;
  88         }
  89
  90         return 0;
  91
  92 detach_iommu:
  93         host1x_client_iommu_detach(client);
  94 free:
  95         host1x_syncpt_put(client->syncpts[0]);
  96 put:
  97         host1x_channel_put(gr3d->channel);
  98         return err;
  99 }
 100
 101 static int gr3d_exit(struct host1x_client *client)
 102 {
 103         struct tegra_drm_client *drm = host1x_to_drm_client(client);
 104         struct drm_device *dev = dev_get_drvdata(client->host);
 105         struct gr3d *gr3d = to_gr3d(drm);
 106         int err;
 107
 108         err = tegra_drm_unregister_client(dev->dev_private, drm);
 109         if (err < 0)
 110                 return err;
 111
 112         pm_runtime_dont_use_autosuspend(client->dev);
 113         pm_runtime_force_suspend(client->dev);
 114
 115         host1x_client_iommu_detach(client);
 116         host1x_syncpt_put(client->syncpts[0]);
 117         host1x_channel_put(gr3d->channel);
 118
 119         gr3d->channel = NULL;
 120
 121         return 0;
 122 }
 123
 124 static const struct host1x_client_ops gr3d_client_ops = {
 125         .init = gr3d_init,
 126         .exit = gr3d_exit,
 127 };
 128
 129 static int gr3d_open_channel(struct tegra_drm_client *client,
 130                              struct tegra_drm_context *context)
 131 {
 132         struct gr3d *gr3d = to_gr3d(client);
 133
 134         context->channel = host1x_channel_get(gr3d->channel);
 135         if (!context->channel)
 136                 return -ENOMEM;
 137
 138         return 0;
 139 }
 140
 141 static void gr3d_close_channel(struct tegra_drm_context *context)
 142 {
 143         host1x_channel_put(context->channel);
 144 }
 145
 146 static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset)
 147 {
 148         struct gr3d *gr3d = dev_get_drvdata(dev);
 149
 150         switch (class) {
 151         case HOST1X_CLASS_HOST1X:
 152                 if (offset == 0x2b)
 153                         return 1;
 154
 155                 break;
 156
 157         case HOST1X_CLASS_GR3D:
 158                 if (offset >= GR3D_NUM_REGS)
 159                         break;
 160
 161                 if (test_bit(offset, gr3d->addr_regs))
 162                         return 1;
 163
 164                 break;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static const struct tegra_drm_client_ops gr3d_ops = {
 171         .open_channel = gr3d_open_channel,
 172         .close_channel = gr3d_close_channel,
 173         .is_addr_reg = gr3d_is_addr_reg,
 174         .submit = tegra_drm_submit,
 175 };
 176
 177 static const struct gr3d_soc tegra20_gr3d_soc = {
 178         .version = 0x20,
 179         .num_clocks = 1,
 180         .num_resets = 2,
 181 };
 182
 183 static const struct gr3d_soc tegra30_gr3d_soc = {
 184         .version = 0x30,
 185         .num_clocks = 2,
 186         .num_resets = 4,
 187 };
 188
 189 static const struct gr3d_soc tegra114_gr3d_soc = {
 190         .version = 0x35,
 191         .num_clocks = 1,
 192         .num_resets = 2,
 193 };
 194
 195 static const struct of_device_id tegra_gr3d_match[] = {
 196         { .compatible = "nvidia,tegra114-gr3d", .data = &tegra114_gr3d_soc },
 197         { .compatible = "nvidia,tegra30-gr3d", .data = &tegra30_gr3d_soc },
 198         { .compatible = "nvidia,tegra20-gr3d", .data = &tegra20_gr3d_soc },
 199         { }
 200 };
 201 MODULE_DEVICE_TABLE(of, tegra_gr3d_match);
 202
 203 static const u32 gr3d_addr_regs[] = {
 204         GR3D_IDX_ATTRIBUTE( 0),
 205         GR3D_IDX_ATTRIBUTE( 1),
 206         GR3D_IDX_ATTRIBUTE( 2),
 207         GR3D_IDX_ATTRIBUTE( 3),
 208         GR3D_IDX_ATTRIBUTE( 4),
 209         GR3D_IDX_ATTRIBUTE( 5),
 210         GR3D_IDX_ATTRIBUTE( 6),
 211         GR3D_IDX_ATTRIBUTE( 7),
 212         GR3D_IDX_ATTRIBUTE( 8),
 213         GR3D_IDX_ATTRIBUTE( 9),
 214         GR3D_IDX_ATTRIBUTE(10),
 215         GR3D_IDX_ATTRIBUTE(11),
 216         GR3D_IDX_ATTRIBUTE(12),
 217         GR3D_IDX_ATTRIBUTE(13),
 218         GR3D_IDX_ATTRIBUTE(14),
 219         GR3D_IDX_ATTRIBUTE(15),
 220         GR3D_IDX_INDEX_BASE,
 221         GR3D_QR_ZTAG_ADDR,
 222         GR3D_QR_CTAG_ADDR,
 223         GR3D_QR_CZ_ADDR,
 224         GR3D_TEX_TEX_ADDR( 0),
 225         GR3D_TEX_TEX_ADDR( 1),
 226         GR3D_TEX_TEX_ADDR( 2),
 227         GR3D_TEX_TEX_ADDR( 3),
 228         GR3D_TEX_TEX_ADDR( 4),
 229         GR3D_TEX_TEX_ADDR( 5),
 230         GR3D_TEX_TEX_ADDR( 6),
 231         GR3D_TEX_TEX_ADDR( 7),
 232         GR3D_TEX_TEX_ADDR( 8),
 233         GR3D_TEX_TEX_ADDR( 9),
 234         GR3D_TEX_TEX_ADDR(10),
 235         GR3D_TEX_TEX_ADDR(11),
 236         GR3D_TEX_TEX_ADDR(12),
 237         GR3D_TEX_TEX_ADDR(13),
 238         GR3D_TEX_TEX_ADDR(14),
 239         GR3D_TEX_TEX_ADDR(15),
 240         GR3D_DW_MEMORY_OUTPUT_ADDRESS,
 241         GR3D_GLOBAL_SURFADDR( 0),
 242         GR3D_GLOBAL_SURFADDR( 1),
 243         GR3D_GLOBAL_SURFADDR( 2),
 244         GR3D_GLOBAL_SURFADDR( 3),
 245         GR3D_GLOBAL_SURFADDR( 4),
 246         GR3D_GLOBAL_SURFADDR( 5),
 247         GR3D_GLOBAL_SURFADDR( 6),
 248         GR3D_GLOBAL_SURFADDR( 7),
 249         GR3D_GLOBAL_SURFADDR( 8),
 250         GR3D_GLOBAL_SURFADDR( 9),
 251         GR3D_GLOBAL_SURFADDR(10),
 252         GR3D_GLOBAL_SURFADDR(11),
 253         GR3D_GLOBAL_SURFADDR(12),
 254         GR3D_GLOBAL_SURFADDR(13),
 255         GR3D_GLOBAL_SURFADDR(14),
 256         GR3D_GLOBAL_SURFADDR(15),
 257         GR3D_GLOBAL_SPILLSURFADDR,
 258         GR3D_GLOBAL_SURFOVERADDR( 0),
 259         GR3D_GLOBAL_SURFOVERADDR( 1),
 260         GR3D_GLOBAL_SURFOVERADDR( 2),
 261         GR3D_GLOBAL_SURFOVERADDR( 3),
 262         GR3D_GLOBAL_SURFOVERADDR( 4),
 263         GR3D_GLOBAL_SURFOVERADDR( 5),
 264         GR3D_GLOBAL_SURFOVERADDR( 6),
 265         GR3D_GLOBAL_SURFOVERADDR( 7),
 266         GR3D_GLOBAL_SURFOVERADDR( 8),
 267         GR3D_GLOBAL_SURFOVERADDR( 9),
 268         GR3D_GLOBAL_SURFOVERADDR(10),
 269         GR3D_GLOBAL_SURFOVERADDR(11),
 270         GR3D_GLOBAL_SURFOVERADDR(12),
 271         GR3D_GLOBAL_SURFOVERADDR(13),
 272         GR3D_GLOBAL_SURFOVERADDR(14),
 273         GR3D_GLOBAL_SURFOVERADDR(15),
 274         GR3D_GLOBAL_SAMP01SURFADDR( 0),
 275         GR3D_GLOBAL_SAMP01SURFADDR( 1),
 276         GR3D_GLOBAL_SAMP01SURFADDR( 2),
 277         GR3D_GLOBAL_SAMP01SURFADDR( 3),
 278         GR3D_GLOBAL_SAMP01SURFADDR( 4),
 279         GR3D_GLOBAL_SAMP01SURFADDR( 5),
 280         GR3D_GLOBAL_SAMP01SURFADDR( 6),
 281         GR3D_GLOBAL_SAMP01SURFADDR( 7),
 282         GR3D_GLOBAL_SAMP01SURFADDR( 8),
 283         GR3D_GLOBAL_SAMP01SURFADDR( 9),
 284         GR3D_GLOBAL_SAMP01SURFADDR(10),
 285         GR3D_GLOBAL_SAMP01SURFADDR(11),
 286         GR3D_GLOBAL_SAMP01SURFADDR(12),
 287         GR3D_GLOBAL_SAMP01SURFADDR(13),
 288         GR3D_GLOBAL_SAMP01SURFADDR(14),
 289         GR3D_GLOBAL_SAMP01SURFADDR(15),
 290         GR3D_GLOBAL_SAMP23SURFADDR( 0),
 291         GR3D_GLOBAL_SAMP23SURFADDR( 1),
 292         GR3D_GLOBAL_SAMP23SURFADDR( 2),
 293         GR3D_GLOBAL_SAMP23SURFADDR( 3),
 294         GR3D_GLOBAL_SAMP23SURFADDR( 4),
 295         GR3D_GLOBAL_SAMP23SURFADDR( 5),
 296         GR3D_GLOBAL_SAMP23SURFADDR( 6),
 297         GR3D_GLOBAL_SAMP23SURFADDR( 7),
 298         GR3D_GLOBAL_SAMP23SURFADDR( 8),
 299         GR3D_GLOBAL_SAMP23SURFADDR( 9),
 300         GR3D_GLOBAL_SAMP23SURFADDR(10),
 301         GR3D_GLOBAL_SAMP23SURFADDR(11),
 302         GR3D_GLOBAL_SAMP23SURFADDR(12),
 303         GR3D_GLOBAL_SAMP23SURFADDR(13),
 304         GR3D_GLOBAL_SAMP23SURFADDR(14),
 305         GR3D_GLOBAL_SAMP23SURFADDR(15),
 306 };
 307
 308 static int gr3d_power_up_legacy_domain(struct device *dev, const char *name,
 309                                        unsigned int id)
 310 {
 311         struct gr3d *gr3d = dev_get_drvdata(dev);
 312         struct reset_control *reset;
 313         struct clk *clk;
 314         unsigned int i;
 315         int err;
 316
 317         /*
 318          * Tegra20 device-tree doesn't specify 3d clock name and there is only
 319          * one clock for Tegra20. Tegra30+ device-trees always specified names
 320          * for the clocks.
 321          */
 322         if (gr3d->nclocks == 1) {
 323                 if (id == TEGRA_POWERGATE_3D1)
 324                         return 0;
 325
 326                 clk = gr3d->clocks[0].clk;
 327         } else {
 328                 for (i = 0; i < gr3d->nclocks; i++) {
 329                         if (WARN_ON(!gr3d->clocks[i].id))
 330                                 continue;
 331
 332                         if (!strcmp(gr3d->clocks[i].id, name)) {
 333                                 clk = gr3d->clocks[i].clk;
 334                                 break;
 335                         }
 336                 }
 337
 338                 if (WARN_ON(i == gr3d->nclocks))
 339                         return -EINVAL;
 340         }
 341
 342         /*
 343          * We use array of resets, which includes MC resets, and MC
 344          * reset shouldn't be asserted while hardware is gated because
 345          * MC flushing will fail for gated hardware. Hence for legacy
 346          * PD we request the individual reset separately.
 347          */
 348         reset = reset_control_get_exclusive_released(dev, name);
 349         if (IS_ERR(reset))
 350                 return PTR_ERR(reset);
 351
 352         err = reset_control_acquire(reset);
 353         if (err) {
 354                 dev_err(dev, "failed to acquire %s reset: %d\n", name, err);
 355         } else {
 356                 err = tegra_powergate_sequence_power_up(id, clk, reset);
 357                 reset_control_release(reset);
 358         }
 359
 360         reset_control_put(reset);
 361         if (err)
 362                 return err;
 363
 364         /*
 365          * tegra_powergate_sequence_power_up() leaves clocks enabled,
 366          * while GENPD not. Hence keep clock-enable balanced.
 367          */
 368         clk_disable_unprepare(clk);
 369
 370         return 0;
 371 }
 372
 373 static int gr3d_init_power(struct device *dev, struct gr3d *gr3d)
 374 {
 375         struct dev_pm_domain_attach_data pd_data = {
 376                 .pd_names = (const char *[]) { "3d0", "3d1" },
 377                 .num_pd_names = 2,
 378                 .pd_flags = PD_FLAG_REQUIRED_OPP,
 379         };
 380         int err;
 381
 382         err = of_count_phandle_with_args(dev->of_node, "power-domains",
 383                                          "#power-domain-cells");
 384         if (err < 0) {
 385                 if (err != -ENOENT)
 386                         return err;
 387
 388                 /*
 389                  * Older device-trees don't use GENPD. In this case we should
 390                  * toggle power domain manually.
 391                  */
 392                 err = gr3d_power_up_legacy_domain(dev, "3d",
 393                                                   TEGRA_POWERGATE_3D);
 394                 if (err)
 395                         return err;
 396
 397                 err = gr3d_power_up_legacy_domain(dev, "3d2",
 398                                                   TEGRA_POWERGATE_3D1);
 399                 if (err)
 400                         return err;
 401
 402                 return 0;
 403         }
 404
 405         /*
 406          * The PM domain core automatically attaches a single power domain,
 407          * otherwise it skips attaching completely. We have a single domain
 408          * on Tegra20 and two domains on Tegra30+.
 409          */
 410         if (dev->pm_domain)
 411                 return 0;
 412
 413         err = devm_pm_domain_attach_list(dev, &pd_data, &gr3d->pd_list);
 414         if (err < 0)
 415                 return err;
 416
 417         return 0;
 418 }
 419
 420 static int gr3d_get_clocks(struct device *dev, struct gr3d *gr3d)
 421 {
 422         int err;
 423
 424         err = devm_clk_bulk_get_all(dev, &gr3d->clocks);
 425         if (err < 0) {
 426                 dev_err(dev, "failed to get clock: %d\n", err);
 427                 return err;
 428         }
 429         gr3d->nclocks = err;
 430
 431         if (gr3d->nclocks != gr3d->soc->num_clocks) {
 432                 dev_err(dev, "invalid number of clocks: %u\n", gr3d->nclocks);
 433                 return -ENOENT;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int gr3d_get_resets(struct device *dev, struct gr3d *gr3d)
 440 {
 441         int err;
 442
 443         gr3d->resets[RST_MC].id = "mc";
 444         gr3d->resets[RST_MC2].id = "mc2";
 445         gr3d->resets[RST_GR3D].id = "3d";
 446         gr3d->resets[RST_GR3D2].id = "3d2";
 447         gr3d->nresets = gr3d->soc->num_resets;
 448
 449         err = devm_reset_control_bulk_get_optional_exclusive_released(
 450                                 dev, gr3d->nresets, gr3d->resets);
 451         if (err) {
 452                 dev_err(dev, "failed to get reset: %d\n", err);
 453                 return err;
 454         }
 455
 456         if (WARN_ON(!gr3d->resets[RST_GR3D].rstc) ||
 457             WARN_ON(!gr3d->resets[RST_GR3D2].rstc && gr3d->nresets == 4))
 458                 return -ENOENT;
 459
 460         return 0;
 461 }
 462
 463 static int gr3d_probe(struct platform_device *pdev)
 464 {
 465         struct host1x_syncpt **syncpts;
 466         struct gr3d *gr3d;
 467         unsigned int i;
 468         int err;
 469
 470         gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL);
 471         if (!gr3d)
 472                 return -ENOMEM;
 473
 474         platform_set_drvdata(pdev, gr3d);
 475
 476         gr3d->soc = of_device_get_match_data(&pdev->dev);
 477
 478         syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL);
 479         if (!syncpts)
 480                 return -ENOMEM;
 481
 482         err = gr3d_get_clocks(&pdev->dev, gr3d);
 483         if (err)
 484                 return err;
 485
 486         err = gr3d_get_resets(&pdev->dev, gr3d);
 487         if (err)
 488                 return err;
 489
 490         err = gr3d_init_power(&pdev->dev, gr3d);
 491         if (err)
 492                 return err;
 493
 494         INIT_LIST_HEAD(&gr3d->client.base.list);
 495         gr3d->client.base.ops = &gr3d_client_ops;
 496         gr3d->client.base.dev = &pdev->dev;
 497         gr3d->client.base.class = HOST1X_CLASS_GR3D;
 498         gr3d->client.base.syncpts = syncpts;
 499         gr3d->client.base.num_syncpts = 1;
 500
 501         INIT_LIST_HEAD(&gr3d->client.list);
 502         gr3d->client.version = gr3d->soc->version;
 503         gr3d->client.ops = &gr3d_ops;
 504
 505         err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
 506         if (err)
 507                 return err;
 508
 509         err = host1x_client_register(&gr3d->client.base);
 510         if (err < 0) {
 511                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
 512                         err);
 513                 return err;
 514         }
 515
 516         /* initialize address register map */
 517         for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++)
 518                 set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
 519
 520         return 0;
 521 }
 522
 523 static void gr3d_remove(struct platform_device *pdev)
 524 {
 525         struct gr3d *gr3d = platform_get_drvdata(pdev);
 526
 527         pm_runtime_disable(&pdev->dev);
 528         host1x_client_unregister(&gr3d->client.base);
 529 }
 530
 531 static int __maybe_unused gr3d_runtime_suspend(struct device *dev)
 532 {
 533         struct gr3d *gr3d = dev_get_drvdata(dev);
 534         int err;
 535
 536         host1x_channel_stop(gr3d->channel);
 537
 538         err = reset_control_bulk_assert(gr3d->nresets, gr3d->resets);
 539         if (err) {
 540                 dev_err(dev, "failed to assert reset: %d\n", err);
 541                 return err;
 542         }
 543
 544         usleep_range(10, 20);
 545
 546         /*
 547          * Older device-trees don't specify MC resets and power-gating can't
 548          * be done safely in that case. Hence we will keep the power ungated
 549          * for older DTBs. For newer DTBs, GENPD will perform the power-gating.
 550          */
 551
 552         clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks);
 553         reset_control_bulk_release(gr3d->nresets, gr3d->resets);
 554
 555         return 0;
 556 }
 557
 558 static int __maybe_unused gr3d_runtime_resume(struct device *dev)
 559 {
 560         struct gr3d *gr3d = dev_get_drvdata(dev);
 561         int err;
 562
 563         err = reset_control_bulk_acquire(gr3d->nresets, gr3d->resets);
 564         if (err) {
 565                 dev_err(dev, "failed to acquire reset: %d\n", err);
 566                 return err;
 567         }
 568
 569         err = clk_bulk_prepare_enable(gr3d->nclocks, gr3d->clocks);
 570         if (err) {
 571                 dev_err(dev, "failed to enable clock: %d\n", err);
 572                 goto release_reset;
 573         }
 574
 575         err = reset_control_bulk_deassert(gr3d->nresets, gr3d->resets);
 576         if (err) {
 577                 dev_err(dev, "failed to deassert reset: %d\n", err);
 578                 goto disable_clk;
 579         }
 580
 581         pm_runtime_enable(dev);
 582         pm_runtime_use_autosuspend(dev);
 583         pm_runtime_set_autosuspend_delay(dev, 500);
 584
 585         return 0;
 586
 587 disable_clk:
 588         clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks);
 589 release_reset:
 590         reset_control_bulk_release(gr3d->nresets, gr3d->resets);
 591
 592         return err;
 593 }
 594
 595 static const struct dev_pm_ops tegra_gr3d_pm = {
 596         SET_RUNTIME_PM_OPS(gr3d_runtime_suspend, gr3d_runtime_resume, NULL)
 597         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 598                                 pm_runtime_force_resume)
 599 };
 600
 601 struct platform_driver tegra_gr3d_driver = {
 602         .driver = {
 603                 .name = "tegra-gr3d",
 604                 .of_match_table = tegra_gr3d_match,
 605                 .pm = &tegra_gr3d_pm,
 606         },
 607         .probe = gr3d_probe,
 608         .remove = gr3d_remove,
 609 };