drivers/gpu/drm/tegra/vic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015, NVIDIA Corporation.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/delay.h>
   8 #include <linux/host1x.h>
   9 #include <linux/iommu.h>
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/of_device.h>
  13 #include <linux/of_platform.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/reset.h>
  17
  18 #include <soc/tegra/pmc.h>
  19
  20 #include "drm.h"
  21 #include "falcon.h"
  22 #include "vic.h"
  23
  24 struct vic_config {
  25         const char *firmware;
  26         unsigned int version;
  27         bool supports_sid;
  28 };
  29
  30 struct vic {
  31         struct falcon falcon;
  32         bool booted;
  33
  34         void __iomem *regs;
  35         struct tegra_drm_client client;
  36         struct host1x_channel *channel;
  37         struct device *dev;
  38         struct clk *clk;
  39         struct reset_control *rst;
  40
  41         /* Platform configuration */
  42         const struct vic_config *config;
  43 };
  44
  45 static inline struct vic *to_vic(struct tegra_drm_client *client)
  46 {
  47         return container_of(client, struct vic, client);
  48 }
  49
  50 static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
  51 {
  52         writel(value, vic->regs + offset);
  53 }
  54
  55 static int vic_runtime_resume(struct device *dev)
  56 {
  57         struct vic *vic = dev_get_drvdata(dev);
  58         int err;
  59
  60         err = clk_prepare_enable(vic->clk);
  61         if (err < 0)
  62                 return err;
  63
  64         usleep_range(10, 20);
  65
  66         err = reset_control_deassert(vic->rst);
  67         if (err < 0)
  68                 goto disable;
  69
  70         usleep_range(10, 20);
  71
  72         return 0;
  73
  74 disable:
  75         clk_disable_unprepare(vic->clk);
  76         return err;
  77 }
  78
  79 static int vic_runtime_suspend(struct device *dev)
  80 {
  81         struct vic *vic = dev_get_drvdata(dev);
  82         int err;
  83
  84         err = reset_control_assert(vic->rst);
  85         if (err < 0)
  86                 return err;
  87
  88         usleep_range(2000, 4000);
  89
  90         clk_disable_unprepare(vic->clk);
  91
  92         vic->booted = false;
  93
  94         return 0;
  95 }
  96
  97 static int vic_boot(struct vic *vic)
  98 {
  99 #ifdef CONFIG_IOMMU_API
 100         struct iommu_fwspec *spec = dev_iommu_fwspec_get(vic->dev);
 101 #endif
 102         u32 fce_ucode_size, fce_bin_data_offset;
 103         void *hdr;
 104         int err = 0;
 105
 106         if (vic->booted)
 107                 return 0;
 108
 109 #ifdef CONFIG_IOMMU_API
 110         if (vic->config->supports_sid && spec) {
 111                 u32 value;
 112
 113                 value = TRANSCFG_ATT(1, TRANSCFG_SID_FALCON) |
 114                         TRANSCFG_ATT(0, TRANSCFG_SID_HW);
 115                 vic_writel(vic, value, VIC_TFBIF_TRANSCFG);
 116
 117                 if (spec->num_ids > 0) {
 118                         value = spec->ids[0] & 0xffff;
 119
 120                         vic_writel(vic, value, VIC_THI_STREAMID0);
 121                         vic_writel(vic, value, VIC_THI_STREAMID1);
 122                 }
 123         }
 124 #endif
 125
 126         /* setup clockgating registers */
 127         vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
 128                         CG_IDLE_CG_EN |
 129                         CG_WAKEUP_DLY_CNT(4),
 130                    NV_PVIC_MISC_PRI_VIC_CG);
 131
 132         err = falcon_boot(&vic->falcon);
 133         if (err < 0)
 134                 return err;
 135
 136         hdr = vic->falcon.firmware.virt;
 137         fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
 138         hdr = vic->falcon.firmware.virt +
 139                 *(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
 140         fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
 141
 142         falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
 143         falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
 144                               fce_ucode_size);
 145         falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
 146                               (vic->falcon.firmware.iova + fce_bin_data_offset)
 147                                 >> 8);
 148
 149         err = falcon_wait_idle(&vic->falcon);
 150         if (err < 0) {
 151                 dev_err(vic->dev,
 152                         "failed to set application ID and FCE base\n");
 153                 return err;
 154         }
 155
 156         vic->booted = true;
 157
 158         return 0;
 159 }
 160
 161 static int vic_init(struct host1x_client *client)
 162 {
 163         struct tegra_drm_client *drm = host1x_to_drm_client(client);
 164         struct drm_device *dev = dev_get_drvdata(client->host);
 165         struct tegra_drm *tegra = dev->dev_private;
 166         struct vic *vic = to_vic(drm);
 167         int err;
 168
 169         err = host1x_client_iommu_attach(client);
 170         if (err < 0 && err != -ENODEV) {
 171                 dev_err(vic->dev, "failed to attach to domain: %d\n", err);
 172                 return err;
 173         }
 174
 175         vic->channel = host1x_channel_request(client);
 176         if (!vic->channel) {
 177                 err = -ENOMEM;
 178                 goto detach;
 179         }
 180
 181         client->syncpts[0] = host1x_syncpt_request(client, 0);
 182         if (!client->syncpts[0]) {
 183                 err = -ENOMEM;
 184                 goto free_channel;
 185         }
 186
 187         err = tegra_drm_register_client(tegra, drm);
 188         if (err < 0)
 189                 goto free_syncpt;
 190
 191         /*
 192          * Inherit the DMA parameters (such as maximum segment size) from the
 193          * parent host1x device.
 194          */
 195         client->dev->dma_parms = client->host->dma_parms;
 196
 197         return 0;
 198
 199 free_syncpt:
 200         host1x_syncpt_free(client->syncpts[0]);
 201 free_channel:
 202         host1x_channel_put(vic->channel);
 203 detach:
 204         host1x_client_iommu_detach(client);
 205
 206         return err;
 207 }
 208
 209 static int vic_exit(struct host1x_client *client)
 210 {
 211         struct tegra_drm_client *drm = host1x_to_drm_client(client);
 212         struct drm_device *dev = dev_get_drvdata(client->host);
 213         struct tegra_drm *tegra = dev->dev_private;
 214         struct vic *vic = to_vic(drm);
 215         int err;
 216
 217         /* avoid a dangling pointer just in case this disappears */
 218         client->dev->dma_parms = NULL;
 219
 220         err = tegra_drm_unregister_client(tegra, drm);
 221         if (err < 0)
 222                 return err;
 223
 224         host1x_syncpt_free(client->syncpts[0]);
 225         host1x_channel_put(vic->channel);
 226         host1x_client_iommu_detach(client);
 227
 228         if (client->group) {
 229                 dma_unmap_single(vic->dev, vic->falcon.firmware.phys,
 230                                  vic->falcon.firmware.size, DMA_TO_DEVICE);
 231                 tegra_drm_free(tegra, vic->falcon.firmware.size,
 232                                vic->falcon.firmware.virt,
 233                                vic->falcon.firmware.iova);
 234         } else {
 235                 dma_free_coherent(vic->dev, vic->falcon.firmware.size,
 236                                   vic->falcon.firmware.virt,
 237                                   vic->falcon.firmware.iova);
 238         }
 239
 240         return 0;
 241 }
 242
 243 static const struct host1x_client_ops vic_client_ops = {
 244         .init = vic_init,
 245         .exit = vic_exit,
 246 };
 247
 248 static int vic_load_firmware(struct vic *vic)
 249 {
 250         struct host1x_client *client = &vic->client.base;
 251         struct tegra_drm *tegra = vic->client.drm;
 252         dma_addr_t iova;
 253         size_t size;
 254         void *virt;
 255         int err;
 256
 257         if (vic->falcon.firmware.virt)
 258                 return 0;
 259
 260         err = falcon_read_firmware(&vic->falcon, vic->config->firmware);
 261         if (err < 0)
 262                 return err;
 263
 264         size = vic->falcon.firmware.size;
 265
 266         if (!client->group) {
 267                 virt = dma_alloc_coherent(vic->dev, size, &iova, GFP_KERNEL);
 268
 269                 err = dma_mapping_error(vic->dev, iova);
 270                 if (err < 0)
 271                         return err;
 272         } else {
 273                 virt = tegra_drm_alloc(tegra, size, &iova);
 274         }
 275
 276         vic->falcon.firmware.virt = virt;
 277         vic->falcon.firmware.iova = iova;
 278
 279         err = falcon_load_firmware(&vic->falcon);
 280         if (err < 0)
 281                 goto cleanup;
 282
 283         /*
 284          * In this case we have received an IOVA from the shared domain, so we
 285          * need to make sure to get the physical address so that the DMA API
 286          * knows what memory pages to flush the cache for.
 287          */
 288         if (client->group) {
 289                 dma_addr_t phys;
 290
 291                 phys = dma_map_single(vic->dev, virt, size, DMA_TO_DEVICE);
 292
 293                 err = dma_mapping_error(vic->dev, phys);
 294                 if (err < 0)
 295                         goto cleanup;
 296
 297                 vic->falcon.firmware.phys = phys;
 298         }
 299
 300         return 0;
 301
 302 cleanup:
 303         if (!client->group)
 304                 dma_free_coherent(vic->dev, size, virt, iova);
 305         else
 306                 tegra_drm_free(tegra, size, virt, iova);
 307
 308         return err;
 309 }
 310
 311 static int vic_open_channel(struct tegra_drm_client *client,
 312                             struct tegra_drm_context *context)
 313 {
 314         struct vic *vic = to_vic(client);
 315         int err;
 316
 317         err = pm_runtime_get_sync(vic->dev);
 318         if (err < 0)
 319                 return err;
 320
 321         err = vic_load_firmware(vic);
 322         if (err < 0)
 323                 goto rpm_put;
 324
 325         err = vic_boot(vic);
 326         if (err < 0)
 327                 goto rpm_put;
 328
 329         context->channel = host1x_channel_get(vic->channel);
 330         if (!context->channel) {
 331                 err = -ENOMEM;
 332                 goto rpm_put;
 333         }
 334
 335         return 0;
 336
 337 rpm_put:
 338         pm_runtime_put(vic->dev);
 339         return err;
 340 }
 341
 342 static void vic_close_channel(struct tegra_drm_context *context)
 343 {
 344         struct vic *vic = to_vic(context->client);
 345
 346         host1x_channel_put(context->channel);
 347
 348         pm_runtime_put(vic->dev);
 349 }
 350
 351 static const struct tegra_drm_client_ops vic_ops = {
 352         .open_channel = vic_open_channel,
 353         .close_channel = vic_close_channel,
 354         .submit = tegra_drm_submit,
 355 };
 356
 357 #define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
 358
 359 static const struct vic_config vic_t124_config = {
 360         .firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
 361         .version = 0x40,
 362         .supports_sid = false,
 363 };
 364
 365 #define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
 366
 367 static const struct vic_config vic_t210_config = {
 368         .firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
 369         .version = 0x21,
 370         .supports_sid = false,
 371 };
 372
 373 #define NVIDIA_TEGRA_186_VIC_FIRMWARE "nvidia/tegra186/vic04_ucode.bin"
 374
 375 static const struct vic_config vic_t186_config = {
 376         .firmware = NVIDIA_TEGRA_186_VIC_FIRMWARE,
 377         .version = 0x18,
 378         .supports_sid = true,
 379 };
 380
 381 #define NVIDIA_TEGRA_194_VIC_FIRMWARE "nvidia/tegra194/vic.bin"
 382
 383 static const struct vic_config vic_t194_config = {
 384         .firmware = NVIDIA_TEGRA_194_VIC_FIRMWARE,
 385         .version = 0x19,
 386         .supports_sid = true,
 387 };
 388
 389 static const struct of_device_id tegra_vic_of_match[] = {
 390         { .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
 391         { .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
 392         { .compatible = "nvidia,tegra186-vic", .data = &vic_t186_config },
 393         { .compatible = "nvidia,tegra194-vic", .data = &vic_t194_config },
 394         { },
 395 };
 396 MODULE_DEVICE_TABLE(of, tegra_vic_of_match);
 397
 398 static int vic_probe(struct platform_device *pdev)
 399 {
 400         struct device *dev = &pdev->dev;
 401         struct host1x_syncpt **syncpts;
 402         struct resource *regs;
 403         struct vic *vic;
 404         int err;
 405
 406         /* inherit DMA mask from host1x parent */
 407         err = dma_coerce_mask_and_coherent(dev, *dev->parent->dma_mask);
 408         if (err < 0) {
 409                 dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
 410                 return err;
 411         }
 412
 413         vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
 414         if (!vic)
 415                 return -ENOMEM;
 416
 417         vic->config = of_device_get_match_data(dev);
 418
 419         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
 420         if (!syncpts)
 421                 return -ENOMEM;
 422
 423         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 424         if (!regs) {
 425                 dev_err(&pdev->dev, "failed to get registers\n");
 426                 return -ENXIO;
 427         }
 428
 429         vic->regs = devm_ioremap_resource(dev, regs);
 430         if (IS_ERR(vic->regs))
 431                 return PTR_ERR(vic->regs);
 432
 433         vic->clk = devm_clk_get(dev, NULL);
 434         if (IS_ERR(vic->clk)) {
 435                 dev_err(&pdev->dev, "failed to get clock\n");
 436                 return PTR_ERR(vic->clk);
 437         }
 438
 439         if (!dev->pm_domain) {
 440                 vic->rst = devm_reset_control_get(dev, "vic");
 441                 if (IS_ERR(vic->rst)) {
 442                         dev_err(&pdev->dev, "failed to get reset\n");
 443                         return PTR_ERR(vic->rst);
 444                 }
 445         }
 446
 447         vic->falcon.dev = dev;
 448         vic->falcon.regs = vic->regs;
 449
 450         err = falcon_init(&vic->falcon);
 451         if (err < 0)
 452                 return err;
 453
 454         platform_set_drvdata(pdev, vic);
 455
 456         INIT_LIST_HEAD(&vic->client.base.list);
 457         vic->client.base.ops = &vic_client_ops;
 458         vic->client.base.dev = dev;
 459         vic->client.base.class = HOST1X_CLASS_VIC;
 460         vic->client.base.syncpts = syncpts;
 461         vic->client.base.num_syncpts = 1;
 462         vic->dev = dev;
 463
 464         INIT_LIST_HEAD(&vic->client.list);
 465         vic->client.version = vic->config->version;
 466         vic->client.ops = &vic_ops;
 467
 468         err = host1x_client_register(&vic->client.base);
 469         if (err < 0) {
 470                 dev_err(dev, "failed to register host1x client: %d\n", err);
 471                 goto exit_falcon;
 472         }
 473
 474         pm_runtime_enable(&pdev->dev);
 475         if (!pm_runtime_enabled(&pdev->dev)) {
 476                 err = vic_runtime_resume(&pdev->dev);
 477                 if (err < 0)
 478                         goto unregister_client;
 479         }
 480
 481         return 0;
 482
 483 unregister_client:
 484         host1x_client_unregister(&vic->client.base);
 485 exit_falcon:
 486         falcon_exit(&vic->falcon);
 487
 488         return err;
 489 }
 490
 491 static int vic_remove(struct platform_device *pdev)
 492 {
 493         struct vic *vic = platform_get_drvdata(pdev);
 494         int err;
 495
 496         err = host1x_client_unregister(&vic->client.base);
 497         if (err < 0) {
 498                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 499                         err);
 500                 return err;
 501         }
 502
 503         if (pm_runtime_enabled(&pdev->dev))
 504                 pm_runtime_disable(&pdev->dev);
 505         else
 506                 vic_runtime_suspend(&pdev->dev);
 507
 508         falcon_exit(&vic->falcon);
 509
 510         return 0;
 511 }
 512
 513 static const struct dev_pm_ops vic_pm_ops = {
 514         SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
 515 };
 516
 517 struct platform_driver tegra_vic_driver = {
 518         .driver = {
 519                 .name = "tegra-vic",
 520                 .of_match_table = tegra_vic_of_match,
 521                 .pm = &vic_pm_ops
 522         },
 523         .probe = vic_probe,
 524         .remove = vic_remove,
 525 };
 526
 527 #if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
 528 MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
 529 #endif
 530 #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
 531 MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
 532 #endif
 533 #if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC)
 534 MODULE_FIRMWARE(NVIDIA_TEGRA_186_VIC_FIRMWARE);
 535 #endif
 536 #if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
 537 MODULE_FIRMWARE(NVIDIA_TEGRA_194_VIC_FIRMWARE);
 538 #endif