drivers/gpu/host1x/dev.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Tegra host1x driver
   4  *
   5  * Copyright (c) 2010-2013, NVIDIA Corporation.
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/dma-mapping.h>
  10 #include <linux/io.h>
  11 #include <linux/list.h>
  12 #include <linux/module.h>
  13 #include <linux/of_device.h>
  14 #include <linux/of.h>
  15 #include <linux/slab.h>
  16
  17 #define CREATE_TRACE_POINTS
  18 #include <trace/events/host1x.h>
  19 #undef CREATE_TRACE_POINTS
  20
  21 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
  22 #include <asm/dma-iommu.h>
  23 #endif
  24
  25 #include "bus.h"
  26 #include "channel.h"
  27 #include "debug.h"
  28 #include "dev.h"
  29 #include "intr.h"
  30
  31 #include "hw/host1x01.h"
  32 #include "hw/host1x02.h"
  33 #include "hw/host1x04.h"
  34 #include "hw/host1x05.h"
  35 #include "hw/host1x06.h"
  36 #include "hw/host1x07.h"
  37
  38 void host1x_hypervisor_writel(struct host1x *host1x, u32 v, u32 r)
  39 {
  40         writel(v, host1x->hv_regs + r);
  41 }
  42
  43 u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r)
  44 {
  45         return readl(host1x->hv_regs + r);
  46 }
  47
  48 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
  49 {
  50         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  51
  52         writel(v, sync_regs + r);
  53 }
  54
  55 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
  56 {
  57         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  58
  59         return readl(sync_regs + r);
  60 }
  61
  62 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
  63 {
  64         writel(v, ch->regs + r);
  65 }
  66
  67 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
  68 {
  69         return readl(ch->regs + r);
  70 }
  71
  72 static const struct host1x_info host1x01_info = {
  73         .nb_channels = 8,
  74         .nb_pts = 32,
  75         .nb_mlocks = 16,
  76         .nb_bases = 8,
  77         .init = host1x01_init,
  78         .sync_offset = 0x3000,
  79         .dma_mask = DMA_BIT_MASK(32),
  80 };
  81
  82 static const struct host1x_info host1x02_info = {
  83         .nb_channels = 9,
  84         .nb_pts = 32,
  85         .nb_mlocks = 16,
  86         .nb_bases = 12,
  87         .init = host1x02_init,
  88         .sync_offset = 0x3000,
  89         .dma_mask = DMA_BIT_MASK(32),
  90 };
  91
  92 static const struct host1x_info host1x04_info = {
  93         .nb_channels = 12,
  94         .nb_pts = 192,
  95         .nb_mlocks = 16,
  96         .nb_bases = 64,
  97         .init = host1x04_init,
  98         .sync_offset = 0x2100,
  99         .dma_mask = DMA_BIT_MASK(34),
 100 };
 101
 102 static const struct host1x_info host1x05_info = {
 103         .nb_channels = 14,
 104         .nb_pts = 192,
 105         .nb_mlocks = 16,
 106         .nb_bases = 64,
 107         .init = host1x05_init,
 108         .sync_offset = 0x2100,
 109         .dma_mask = DMA_BIT_MASK(34),
 110 };
 111
 112 static const struct host1x_sid_entry tegra186_sid_table[] = {
 113         {
 114                 /* VIC */
 115                 .base = 0x1af0,
 116                 .offset = 0x30,
 117                 .limit = 0x34
 118         },
 119 };
 120
 121 static const struct host1x_info host1x06_info = {
 122         .nb_channels = 63,
 123         .nb_pts = 576,
 124         .nb_mlocks = 24,
 125         .nb_bases = 16,
 126         .init = host1x06_init,
 127         .sync_offset = 0x0,
 128         .dma_mask = DMA_BIT_MASK(40),
 129         .has_hypervisor = true,
 130         .num_sid_entries = ARRAY_SIZE(tegra186_sid_table),
 131         .sid_table = tegra186_sid_table,
 132 };
 133
 134 static const struct host1x_sid_entry tegra194_sid_table[] = {
 135         {
 136                 /* VIC */
 137                 .base = 0x1af0,
 138                 .offset = 0x30,
 139                 .limit = 0x34
 140         },
 141 };
 142
 143 static const struct host1x_info host1x07_info = {
 144         .nb_channels = 63,
 145         .nb_pts = 704,
 146         .nb_mlocks = 32,
 147         .nb_bases = 0,
 148         .init = host1x07_init,
 149         .sync_offset = 0x0,
 150         .dma_mask = DMA_BIT_MASK(40),
 151         .has_hypervisor = true,
 152         .num_sid_entries = ARRAY_SIZE(tegra194_sid_table),
 153         .sid_table = tegra194_sid_table,
 154 };
 155
 156 static const struct of_device_id host1x_of_match[] = {
 157         { .compatible = "nvidia,tegra194-host1x", .data = &host1x07_info, },
 158         { .compatible = "nvidia,tegra186-host1x", .data = &host1x06_info, },
 159         { .compatible = "nvidia,tegra210-host1x", .data = &host1x05_info, },
 160         { .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
 161         { .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
 162         { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
 163         { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
 164         { },
 165 };
 166 MODULE_DEVICE_TABLE(of, host1x_of_match);
 167
 168 static void host1x_setup_sid_table(struct host1x *host)
 169 {
 170         const struct host1x_info *info = host->info;
 171         unsigned int i;
 172
 173         for (i = 0; i < info->num_sid_entries; i++) {
 174                 const struct host1x_sid_entry *entry = &info->sid_table[i];
 175
 176                 host1x_hypervisor_writel(host, entry->offset, entry->base);
 177                 host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
 178         }
 179 }
 180
 181 static int host1x_probe(struct platform_device *pdev)
 182 {
 183         struct host1x *host;
 184         struct resource *regs, *hv_regs = NULL;
 185         int syncpt_irq;
 186         int err;
 187
 188         host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 189         if (!host)
 190                 return -ENOMEM;
 191
 192         host->info = of_device_get_match_data(&pdev->dev);
 193
 194         if (host->info->has_hypervisor) {
 195                 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vm");
 196                 if (!regs) {
 197                         dev_err(&pdev->dev, "failed to get vm registers\n");
 198                         return -ENXIO;
 199                 }
 200
 201                 hv_regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 202                                                        "hypervisor");
 203                 if (!hv_regs) {
 204                         dev_err(&pdev->dev,
 205                                 "failed to get hypervisor registers\n");
 206                         return -ENXIO;
 207                 }
 208         } else {
 209                 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 210                 if (!regs) {
 211                         dev_err(&pdev->dev, "failed to get registers\n");
 212                         return -ENXIO;
 213                 }
 214         }
 215
 216         syncpt_irq = platform_get_irq(pdev, 0);
 217         if (syncpt_irq < 0) {
 218                 dev_err(&pdev->dev, "failed to get IRQ: %d\n", syncpt_irq);
 219                 return syncpt_irq;
 220         }
 221
 222         mutex_init(&host->devices_lock);
 223         INIT_LIST_HEAD(&host->devices);
 224         INIT_LIST_HEAD(&host->list);
 225         host->dev = &pdev->dev;
 226
 227         /* set common host1x device data */
 228         platform_set_drvdata(pdev, host);
 229
 230         host->regs = devm_ioremap_resource(&pdev->dev, regs);
 231         if (IS_ERR(host->regs))
 232                 return PTR_ERR(host->regs);
 233
 234         if (host->info->has_hypervisor) {
 235                 host->hv_regs = devm_ioremap_resource(&pdev->dev, hv_regs);
 236                 if (IS_ERR(host->hv_regs))
 237                         return PTR_ERR(host->hv_regs);
 238         }
 239
 240         dma_set_mask_and_coherent(host->dev, host->info->dma_mask);
 241
 242         if (host->info->init) {
 243                 err = host->info->init(host);
 244                 if (err)
 245                         return err;
 246         }
 247
 248         host->clk = devm_clk_get(&pdev->dev, NULL);
 249         if (IS_ERR(host->clk)) {
 250                 err = PTR_ERR(host->clk);
 251
 252                 if (err != -EPROBE_DEFER)
 253                         dev_err(&pdev->dev, "failed to get clock: %d\n", err);
 254
 255                 return err;
 256         }
 257
 258         host->rst = devm_reset_control_get(&pdev->dev, "host1x");
 259         if (IS_ERR(host->rst)) {
 260                 err = PTR_ERR(host->rst);
 261                 dev_err(&pdev->dev, "failed to get reset: %d\n", err);
 262                 return err;
 263         }
 264 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
 265         if (host->dev->archdata.mapping) {
 266                 struct dma_iommu_mapping *mapping =
 267                                 to_dma_iommu_mapping(host->dev);
 268                 arm_iommu_detach_device(host->dev);
 269                 arm_iommu_release_mapping(mapping);
 270         }
 271 #endif
 272         if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
 273                 goto skip_iommu;
 274
 275         host->group = iommu_group_get(&pdev->dev);
 276         if (host->group) {
 277                 struct iommu_domain_geometry *geometry;
 278                 u64 mask = dma_get_mask(host->dev);
 279                 dma_addr_t start, end;
 280                 unsigned long order;
 281
 282                 err = iova_cache_get();
 283                 if (err < 0)
 284                         goto put_group;
 285
 286                 host->domain = iommu_domain_alloc(&platform_bus_type);
 287                 if (!host->domain) {
 288                         err = -ENOMEM;
 289                         goto put_cache;
 290                 }
 291
 292                 err = iommu_attach_group(host->domain, host->group);
 293                 if (err) {
 294                         if (err == -ENODEV) {
 295                                 iommu_domain_free(host->domain);
 296                                 host->domain = NULL;
 297                                 iova_cache_put();
 298                                 iommu_group_put(host->group);
 299                                 host->group = NULL;
 300                                 goto skip_iommu;
 301                         }
 302
 303                         goto fail_free_domain;
 304                 }
 305
 306                 geometry = &host->domain->geometry;
 307                 start = geometry->aperture_start & mask;
 308                 end = geometry->aperture_end & mask;
 309
 310                 order = __ffs(host->domain->pgsize_bitmap);
 311                 init_iova_domain(&host->iova, 1UL << order, start >> order);
 312                 host->iova_end = end;
 313         }
 314
 315 skip_iommu:
 316         err = host1x_channel_list_init(&host->channel_list,
 317                                        host->info->nb_channels);
 318         if (err) {
 319                 dev_err(&pdev->dev, "failed to initialize channel list\n");
 320                 goto fail_detach_device;
 321         }
 322
 323         err = clk_prepare_enable(host->clk);
 324         if (err < 0) {
 325                 dev_err(&pdev->dev, "failed to enable clock\n");
 326                 goto fail_free_channels;
 327         }
 328
 329         err = reset_control_deassert(host->rst);
 330         if (err < 0) {
 331                 dev_err(&pdev->dev, "failed to deassert reset: %d\n", err);
 332                 goto fail_unprepare_disable;
 333         }
 334
 335         err = host1x_syncpt_init(host);
 336         if (err) {
 337                 dev_err(&pdev->dev, "failed to initialize syncpts\n");
 338                 goto fail_reset_assert;
 339         }
 340
 341         err = host1x_intr_init(host, syncpt_irq);
 342         if (err) {
 343                 dev_err(&pdev->dev, "failed to initialize interrupts\n");
 344                 goto fail_deinit_syncpt;
 345         }
 346
 347         host1x_debug_init(host);
 348
 349         if (host->info->has_hypervisor)
 350                 host1x_setup_sid_table(host);
 351
 352         err = host1x_register(host);
 353         if (err < 0)
 354                 goto fail_deinit_intr;
 355
 356         return 0;
 357
 358 fail_deinit_intr:
 359         host1x_intr_deinit(host);
 360 fail_deinit_syncpt:
 361         host1x_syncpt_deinit(host);
 362 fail_reset_assert:
 363         reset_control_assert(host->rst);
 364 fail_unprepare_disable:
 365         clk_disable_unprepare(host->clk);
 366 fail_free_channels:
 367         host1x_channel_list_free(&host->channel_list);
 368 fail_detach_device:
 369         if (host->group && host->domain) {
 370                 put_iova_domain(&host->iova);
 371                 iommu_detach_group(host->domain, host->group);
 372         }
 373 fail_free_domain:
 374         if (host->domain)
 375                 iommu_domain_free(host->domain);
 376 put_cache:
 377         if (host->group)
 378                 iova_cache_put();
 379 put_group:
 380         iommu_group_put(host->group);
 381
 382         return err;
 383 }
 384
 385 static int host1x_remove(struct platform_device *pdev)
 386 {
 387         struct host1x *host = platform_get_drvdata(pdev);
 388
 389         host1x_unregister(host);
 390         host1x_intr_deinit(host);
 391         host1x_syncpt_deinit(host);
 392         reset_control_assert(host->rst);
 393         clk_disable_unprepare(host->clk);
 394
 395         if (host->domain) {
 396                 put_iova_domain(&host->iova);
 397                 iommu_detach_group(host->domain, host->group);
 398                 iommu_domain_free(host->domain);
 399                 iova_cache_put();
 400                 iommu_group_put(host->group);
 401         }
 402
 403         return 0;
 404 }
 405
 406 static struct platform_driver tegra_host1x_driver = {
 407         .driver = {
 408                 .name = "tegra-host1x",
 409                 .of_match_table = host1x_of_match,
 410         },
 411         .probe = host1x_probe,
 412         .remove = host1x_remove,
 413 };
 414
 415 static struct platform_driver * const drivers[] = {
 416         &tegra_host1x_driver,
 417         &tegra_mipi_driver,
 418 };
 419
 420 static int __init tegra_host1x_init(void)
 421 {
 422         int err;
 423
 424         err = bus_register(&host1x_bus_type);
 425         if (err < 0)
 426                 return err;
 427
 428         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 429         if (err < 0)
 430                 bus_unregister(&host1x_bus_type);
 431
 432         return err;
 433 }
 434 module_init(tegra_host1x_init);
 435
 436 static void __exit tegra_host1x_exit(void)
 437 {
 438         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 439         bus_unregister(&host1x_bus_type);
 440 }
 441 module_exit(tegra_host1x_exit);
 442
 443 MODULE_AUTHOR("Thierry Reding <[email protected]>");
 444 MODULE_AUTHOR("Terje Bergstrom <[email protected]>");
 445 MODULE_DESCRIPTION("Host1x driver for Tegra products");
 446 MODULE_LICENSE("GPL");