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_device.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 50 DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS); 51 }; 52 53 static inline struct gr3d *to_gr3d(struct tegra_drm_client *client) 54 { 55 return container_of(client, struct gr3d, client); 56 } 57 58 static int gr3d_init(struct host1x_client *client) 59 { 60 struct tegra_drm_client *drm = host1x_to_drm_client(client); 61 struct drm_device *dev = dev_get_drvdata(client->host); 62 unsigned long flags = HOST1X_SYNCPT_HAS_BASE; 63 struct gr3d *gr3d = to_gr3d(drm); 64 int err; 65 66 gr3d->channel = host1x_channel_request(client); 67 if (!gr3d->channel) 68 return -ENOMEM; 69 70 client->syncpts[0] = host1x_syncpt_request(client, flags); 71 if (!client->syncpts[0]) { 72 err = -ENOMEM; 73 dev_err(client->dev, "failed to request syncpoint: %d\n", err); 74 goto put; 75 } 76 77 err = host1x_client_iommu_attach(client); 78 if (err < 0) { 79 dev_err(client->dev, "failed to attach to domain: %d\n", err); 80 goto free; 81 } 82 83 pm_runtime_enable(client->dev); 84 pm_runtime_use_autosuspend(client->dev); 85 pm_runtime_set_autosuspend_delay(client->dev, 200); 86 87 err = tegra_drm_register_client(dev->dev_private, drm); 88 if (err < 0) { 89 dev_err(client->dev, "failed to register client: %d\n", err); 90 goto disable_rpm; 91 } 92 93 return 0; 94 95 disable_rpm: 96 pm_runtime_dont_use_autosuspend(client->dev); 97 pm_runtime_force_suspend(client->dev); 98 99 host1x_client_iommu_detach(client); 100 free: 101 host1x_syncpt_put(client->syncpts[0]); 102 put: 103 host1x_channel_put(gr3d->channel); 104 return err; 105 } 106 107 static int gr3d_exit(struct host1x_client *client) 108 { 109 struct tegra_drm_client *drm = host1x_to_drm_client(client); 110 struct drm_device *dev = dev_get_drvdata(client->host); 111 struct gr3d *gr3d = to_gr3d(drm); 112 int err; 113 114 err = tegra_drm_unregister_client(dev->dev_private, drm); 115 if (err < 0) 116 return err; 117 118 pm_runtime_dont_use_autosuspend(client->dev); 119 pm_runtime_force_suspend(client->dev); 120 121 host1x_client_iommu_detach(client); 122 host1x_syncpt_put(client->syncpts[0]); 123 host1x_channel_put(gr3d->channel); 124 125 gr3d->channel = NULL; 126 127 return 0; 128 } 129 130 static const struct host1x_client_ops gr3d_client_ops = { 131 .init = gr3d_init, 132 .exit = gr3d_exit, 133 }; 134 135 static int gr3d_open_channel(struct tegra_drm_client *client, 136 struct tegra_drm_context *context) 137 { 138 struct gr3d *gr3d = to_gr3d(client); 139 140 context->channel = host1x_channel_get(gr3d->channel); 141 if (!context->channel) 142 return -ENOMEM; 143 144 return 0; 145 } 146 147 static void gr3d_close_channel(struct tegra_drm_context *context) 148 { 149 host1x_channel_put(context->channel); 150 } 151 152 static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset) 153 { 154 struct gr3d *gr3d = dev_get_drvdata(dev); 155 156 switch (class) { 157 case HOST1X_CLASS_HOST1X: 158 if (offset == 0x2b) 159 return 1; 160 161 break; 162 163 case HOST1X_CLASS_GR3D: 164 if (offset >= GR3D_NUM_REGS) 165 break; 166 167 if (test_bit(offset, gr3d->addr_regs)) 168 return 1; 169 170 break; 171 } 172 173 return 0; 174 } 175 176 static const struct tegra_drm_client_ops gr3d_ops = { 177 .open_channel = gr3d_open_channel, 178 .close_channel = gr3d_close_channel, 179 .is_addr_reg = gr3d_is_addr_reg, 180 .submit = tegra_drm_submit, 181 }; 182 183 static const struct gr3d_soc tegra20_gr3d_soc = { 184 .version = 0x20, 185 .num_clocks = 1, 186 .num_resets = 2, 187 }; 188 189 static const struct gr3d_soc tegra30_gr3d_soc = { 190 .version = 0x30, 191 .num_clocks = 2, 192 .num_resets = 4, 193 }; 194 195 static const struct gr3d_soc tegra114_gr3d_soc = { 196 .version = 0x35, 197 .num_clocks = 1, 198 .num_resets = 2, 199 }; 200 201 static const struct of_device_id tegra_gr3d_match[] = { 202 { .compatible = "nvidia,tegra114-gr3d", .data = &tegra114_gr3d_soc }, 203 { .compatible = "nvidia,tegra30-gr3d", .data = &tegra30_gr3d_soc }, 204 { .compatible = "nvidia,tegra20-gr3d", .data = &tegra20_gr3d_soc }, 205 { } 206 }; 207 MODULE_DEVICE_TABLE(of, tegra_gr3d_match); 208 209 static const u32 gr3d_addr_regs[] = { 210 GR3D_IDX_ATTRIBUTE( 0), 211 GR3D_IDX_ATTRIBUTE( 1), 212 GR3D_IDX_ATTRIBUTE( 2), 213 GR3D_IDX_ATTRIBUTE( 3), 214 GR3D_IDX_ATTRIBUTE( 4), 215 GR3D_IDX_ATTRIBUTE( 5), 216 GR3D_IDX_ATTRIBUTE( 6), 217 GR3D_IDX_ATTRIBUTE( 7), 218 GR3D_IDX_ATTRIBUTE( 8), 219 GR3D_IDX_ATTRIBUTE( 9), 220 GR3D_IDX_ATTRIBUTE(10), 221 GR3D_IDX_ATTRIBUTE(11), 222 GR3D_IDX_ATTRIBUTE(12), 223 GR3D_IDX_ATTRIBUTE(13), 224 GR3D_IDX_ATTRIBUTE(14), 225 GR3D_IDX_ATTRIBUTE(15), 226 GR3D_IDX_INDEX_BASE, 227 GR3D_QR_ZTAG_ADDR, 228 GR3D_QR_CTAG_ADDR, 229 GR3D_QR_CZ_ADDR, 230 GR3D_TEX_TEX_ADDR( 0), 231 GR3D_TEX_TEX_ADDR( 1), 232 GR3D_TEX_TEX_ADDR( 2), 233 GR3D_TEX_TEX_ADDR( 3), 234 GR3D_TEX_TEX_ADDR( 4), 235 GR3D_TEX_TEX_ADDR( 5), 236 GR3D_TEX_TEX_ADDR( 6), 237 GR3D_TEX_TEX_ADDR( 7), 238 GR3D_TEX_TEX_ADDR( 8), 239 GR3D_TEX_TEX_ADDR( 9), 240 GR3D_TEX_TEX_ADDR(10), 241 GR3D_TEX_TEX_ADDR(11), 242 GR3D_TEX_TEX_ADDR(12), 243 GR3D_TEX_TEX_ADDR(13), 244 GR3D_TEX_TEX_ADDR(14), 245 GR3D_TEX_TEX_ADDR(15), 246 GR3D_DW_MEMORY_OUTPUT_ADDRESS, 247 GR3D_GLOBAL_SURFADDR( 0), 248 GR3D_GLOBAL_SURFADDR( 1), 249 GR3D_GLOBAL_SURFADDR( 2), 250 GR3D_GLOBAL_SURFADDR( 3), 251 GR3D_GLOBAL_SURFADDR( 4), 252 GR3D_GLOBAL_SURFADDR( 5), 253 GR3D_GLOBAL_SURFADDR( 6), 254 GR3D_GLOBAL_SURFADDR( 7), 255 GR3D_GLOBAL_SURFADDR( 8), 256 GR3D_GLOBAL_SURFADDR( 9), 257 GR3D_GLOBAL_SURFADDR(10), 258 GR3D_GLOBAL_SURFADDR(11), 259 GR3D_GLOBAL_SURFADDR(12), 260 GR3D_GLOBAL_SURFADDR(13), 261 GR3D_GLOBAL_SURFADDR(14), 262 GR3D_GLOBAL_SURFADDR(15), 263 GR3D_GLOBAL_SPILLSURFADDR, 264 GR3D_GLOBAL_SURFOVERADDR( 0), 265 GR3D_GLOBAL_SURFOVERADDR( 1), 266 GR3D_GLOBAL_SURFOVERADDR( 2), 267 GR3D_GLOBAL_SURFOVERADDR( 3), 268 GR3D_GLOBAL_SURFOVERADDR( 4), 269 GR3D_GLOBAL_SURFOVERADDR( 5), 270 GR3D_GLOBAL_SURFOVERADDR( 6), 271 GR3D_GLOBAL_SURFOVERADDR( 7), 272 GR3D_GLOBAL_SURFOVERADDR( 8), 273 GR3D_GLOBAL_SURFOVERADDR( 9), 274 GR3D_GLOBAL_SURFOVERADDR(10), 275 GR3D_GLOBAL_SURFOVERADDR(11), 276 GR3D_GLOBAL_SURFOVERADDR(12), 277 GR3D_GLOBAL_SURFOVERADDR(13), 278 GR3D_GLOBAL_SURFOVERADDR(14), 279 GR3D_GLOBAL_SURFOVERADDR(15), 280 GR3D_GLOBAL_SAMP01SURFADDR( 0), 281 GR3D_GLOBAL_SAMP01SURFADDR( 1), 282 GR3D_GLOBAL_SAMP01SURFADDR( 2), 283 GR3D_GLOBAL_SAMP01SURFADDR( 3), 284 GR3D_GLOBAL_SAMP01SURFADDR( 4), 285 GR3D_GLOBAL_SAMP01SURFADDR( 5), 286 GR3D_GLOBAL_SAMP01SURFADDR( 6), 287 GR3D_GLOBAL_SAMP01SURFADDR( 7), 288 GR3D_GLOBAL_SAMP01SURFADDR( 8), 289 GR3D_GLOBAL_SAMP01SURFADDR( 9), 290 GR3D_GLOBAL_SAMP01SURFADDR(10), 291 GR3D_GLOBAL_SAMP01SURFADDR(11), 292 GR3D_GLOBAL_SAMP01SURFADDR(12), 293 GR3D_GLOBAL_SAMP01SURFADDR(13), 294 GR3D_GLOBAL_SAMP01SURFADDR(14), 295 GR3D_GLOBAL_SAMP01SURFADDR(15), 296 GR3D_GLOBAL_SAMP23SURFADDR( 0), 297 GR3D_GLOBAL_SAMP23SURFADDR( 1), 298 GR3D_GLOBAL_SAMP23SURFADDR( 2), 299 GR3D_GLOBAL_SAMP23SURFADDR( 3), 300 GR3D_GLOBAL_SAMP23SURFADDR( 4), 301 GR3D_GLOBAL_SAMP23SURFADDR( 5), 302 GR3D_GLOBAL_SAMP23SURFADDR( 6), 303 GR3D_GLOBAL_SAMP23SURFADDR( 7), 304 GR3D_GLOBAL_SAMP23SURFADDR( 8), 305 GR3D_GLOBAL_SAMP23SURFADDR( 9), 306 GR3D_GLOBAL_SAMP23SURFADDR(10), 307 GR3D_GLOBAL_SAMP23SURFADDR(11), 308 GR3D_GLOBAL_SAMP23SURFADDR(12), 309 GR3D_GLOBAL_SAMP23SURFADDR(13), 310 GR3D_GLOBAL_SAMP23SURFADDR(14), 311 GR3D_GLOBAL_SAMP23SURFADDR(15), 312 }; 313 314 static int gr3d_power_up_legacy_domain(struct device *dev, const char *name, 315 unsigned int id) 316 { 317 struct gr3d *gr3d = dev_get_drvdata(dev); 318 struct reset_control *reset; 319 struct clk *clk; 320 unsigned int i; 321 int err; 322 323 /* 324 * Tegra20 device-tree doesn't specify 3d clock name and there is only 325 * one clock for Tegra20. Tegra30+ device-trees always specified names 326 * for the clocks. 327 */ 328 if (gr3d->nclocks == 1) { 329 if (id == TEGRA_POWERGATE_3D1) 330 return 0; 331 332 clk = gr3d->clocks[0].clk; 333 } else { 334 for (i = 0; i < gr3d->nclocks; i++) { 335 if (WARN_ON(!gr3d->clocks[i].id)) 336 continue; 337 338 if (!strcmp(gr3d->clocks[i].id, name)) { 339 clk = gr3d->clocks[i].clk; 340 break; 341 } 342 } 343 344 if (WARN_ON(i == gr3d->nclocks)) 345 return -EINVAL; 346 } 347 348 /* 349 * We use array of resets, which includes MC resets, and MC 350 * reset shouldn't be asserted while hardware is gated because 351 * MC flushing will fail for gated hardware. Hence for legacy 352 * PD we request the individual reset separately. 353 */ 354 reset = reset_control_get_exclusive_released(dev, name); 355 if (IS_ERR(reset)) 356 return PTR_ERR(reset); 357 358 err = reset_control_acquire(reset); 359 if (err) { 360 dev_err(dev, "failed to acquire %s reset: %d\n", name, err); 361 } else { 362 err = tegra_powergate_sequence_power_up(id, clk, reset); 363 reset_control_release(reset); 364 } 365 366 reset_control_put(reset); 367 if (err) 368 return err; 369 370 /* 371 * tegra_powergate_sequence_power_up() leaves clocks enabled, 372 * while GENPD not. Hence keep clock-enable balanced. 373 */ 374 clk_disable_unprepare(clk); 375 376 return 0; 377 } 378 379 static void gr3d_del_link(void *link) 380 { 381 device_link_del(link); 382 } 383 384 static int gr3d_init_power(struct device *dev, struct gr3d *gr3d) 385 { 386 static const char * const opp_genpd_names[] = { "3d0", "3d1", NULL }; 387 const u32 link_flags = DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME; 388 struct device **opp_virt_devs, *pd_dev; 389 struct device_link *link; 390 unsigned int i; 391 int err; 392 393 err = of_count_phandle_with_args(dev->of_node, "power-domains", 394 "#power-domain-cells"); 395 if (err < 0) { 396 if (err != -ENOENT) 397 return err; 398 399 /* 400 * Older device-trees don't use GENPD. In this case we should 401 * toggle power domain manually. 402 */ 403 err = gr3d_power_up_legacy_domain(dev, "3d", 404 TEGRA_POWERGATE_3D); 405 if (err) 406 return err; 407 408 err = gr3d_power_up_legacy_domain(dev, "3d2", 409 TEGRA_POWERGATE_3D1); 410 if (err) 411 return err; 412 413 return 0; 414 } 415 416 /* 417 * The PM domain core automatically attaches a single power domain, 418 * otherwise it skips attaching completely. We have a single domain 419 * on Tegra20 and two domains on Tegra30+. 420 */ 421 if (dev->pm_domain) 422 return 0; 423 424 err = devm_pm_opp_attach_genpd(dev, opp_genpd_names, &opp_virt_devs); 425 if (err) 426 return err; 427 428 for (i = 0; opp_genpd_names[i]; i++) { 429 pd_dev = opp_virt_devs[i]; 430 if (!pd_dev) { 431 dev_err(dev, "failed to get %s power domain\n", 432 opp_genpd_names[i]); 433 return -EINVAL; 434 } 435 436 link = device_link_add(dev, pd_dev, link_flags); 437 if (!link) { 438 dev_err(dev, "failed to link to %s\n", dev_name(pd_dev)); 439 return -EINVAL; 440 } 441 442 err = devm_add_action_or_reset(dev, gr3d_del_link, link); 443 if (err) 444 return err; 445 } 446 447 return 0; 448 } 449 450 static int gr3d_get_clocks(struct device *dev, struct gr3d *gr3d) 451 { 452 int err; 453 454 err = devm_clk_bulk_get_all(dev, &gr3d->clocks); 455 if (err < 0) { 456 dev_err(dev, "failed to get clock: %d\n", err); 457 return err; 458 } 459 gr3d->nclocks = err; 460 461 if (gr3d->nclocks != gr3d->soc->num_clocks) { 462 dev_err(dev, "invalid number of clocks: %u\n", gr3d->nclocks); 463 return -ENOENT; 464 } 465 466 return 0; 467 } 468 469 static int gr3d_get_resets(struct device *dev, struct gr3d *gr3d) 470 { 471 int err; 472 473 gr3d->resets[RST_MC].id = "mc"; 474 gr3d->resets[RST_MC2].id = "mc2"; 475 gr3d->resets[RST_GR3D].id = "3d"; 476 gr3d->resets[RST_GR3D2].id = "3d2"; 477 gr3d->nresets = gr3d->soc->num_resets; 478 479 err = devm_reset_control_bulk_get_optional_exclusive_released( 480 dev, gr3d->nresets, gr3d->resets); 481 if (err) { 482 dev_err(dev, "failed to get reset: %d\n", err); 483 return err; 484 } 485 486 if (WARN_ON(!gr3d->resets[RST_GR3D].rstc) || 487 WARN_ON(!gr3d->resets[RST_GR3D2].rstc && gr3d->nresets == 4)) 488 return -ENOENT; 489 490 return 0; 491 } 492 493 static int gr3d_probe(struct platform_device *pdev) 494 { 495 struct host1x_syncpt **syncpts; 496 struct gr3d *gr3d; 497 unsigned int i; 498 int err; 499 500 gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL); 501 if (!gr3d) 502 return -ENOMEM; 503 504 platform_set_drvdata(pdev, gr3d); 505 506 gr3d->soc = of_device_get_match_data(&pdev->dev); 507 508 syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL); 509 if (!syncpts) 510 return -ENOMEM; 511 512 err = gr3d_get_clocks(&pdev->dev, gr3d); 513 if (err) 514 return err; 515 516 err = gr3d_get_resets(&pdev->dev, gr3d); 517 if (err) 518 return err; 519 520 err = gr3d_init_power(&pdev->dev, gr3d); 521 if (err) 522 return err; 523 524 INIT_LIST_HEAD(&gr3d->client.base.list); 525 gr3d->client.base.ops = &gr3d_client_ops; 526 gr3d->client.base.dev = &pdev->dev; 527 gr3d->client.base.class = HOST1X_CLASS_GR3D; 528 gr3d->client.base.syncpts = syncpts; 529 gr3d->client.base.num_syncpts = 1; 530 531 INIT_LIST_HEAD(&gr3d->client.list); 532 gr3d->client.version = gr3d->soc->version; 533 gr3d->client.ops = &gr3d_ops; 534 535 err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev); 536 if (err) 537 return err; 538 539 err = host1x_client_register(&gr3d->client.base); 540 if (err < 0) { 541 dev_err(&pdev->dev, "failed to register host1x client: %d\n", 542 err); 543 return err; 544 } 545 546 /* initialize address register map */ 547 for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++) 548 set_bit(gr3d_addr_regs[i], gr3d->addr_regs); 549 550 return 0; 551 } 552 553 static int gr3d_remove(struct platform_device *pdev) 554 { 555 struct gr3d *gr3d = platform_get_drvdata(pdev); 556 557 host1x_client_unregister(&gr3d->client.base); 558 559 return 0; 560 } 561 562 static int __maybe_unused gr3d_runtime_suspend(struct device *dev) 563 { 564 struct gr3d *gr3d = dev_get_drvdata(dev); 565 int err; 566 567 host1x_channel_stop(gr3d->channel); 568 569 err = reset_control_bulk_assert(gr3d->nresets, gr3d->resets); 570 if (err) { 571 dev_err(dev, "failed to assert reset: %d\n", err); 572 return err; 573 } 574 575 usleep_range(10, 20); 576 577 /* 578 * Older device-trees don't specify MC resets and power-gating can't 579 * be done safely in that case. Hence we will keep the power ungated 580 * for older DTBs. For newer DTBs, GENPD will perform the power-gating. 581 */ 582 583 clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks); 584 reset_control_bulk_release(gr3d->nresets, gr3d->resets); 585 586 return 0; 587 } 588 589 static int __maybe_unused gr3d_runtime_resume(struct device *dev) 590 { 591 struct gr3d *gr3d = dev_get_drvdata(dev); 592 int err; 593 594 err = reset_control_bulk_acquire(gr3d->nresets, gr3d->resets); 595 if (err) { 596 dev_err(dev, "failed to acquire reset: %d\n", err); 597 return err; 598 } 599 600 err = clk_bulk_prepare_enable(gr3d->nclocks, gr3d->clocks); 601 if (err) { 602 dev_err(dev, "failed to enable clock: %d\n", err); 603 goto release_reset; 604 } 605 606 err = reset_control_bulk_deassert(gr3d->nresets, gr3d->resets); 607 if (err) { 608 dev_err(dev, "failed to deassert reset: %d\n", err); 609 goto disable_clk; 610 } 611 612 return 0; 613 614 disable_clk: 615 clk_bulk_disable_unprepare(gr3d->nclocks, gr3d->clocks); 616 release_reset: 617 reset_control_bulk_release(gr3d->nresets, gr3d->resets); 618 619 return err; 620 } 621 622 static const struct dev_pm_ops tegra_gr3d_pm = { 623 SET_RUNTIME_PM_OPS(gr3d_runtime_suspend, gr3d_runtime_resume, NULL) 624 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 625 pm_runtime_force_resume) 626 }; 627 628 struct platform_driver tegra_gr3d_driver = { 629 .driver = { 630 .name = "tegra-gr3d", 631 .of_match_table = tegra_gr3d_match, 632 .pm = &tegra_gr3d_pm, 633 }, 634 .probe = gr3d_probe, 635 .remove = gr3d_remove, 636 }; 637