drivers/gpu/host1x/dev.c

   1 /*
   2  * Tegra host1x driver
   3  *
   4  * Copyright (c) 2010-2013, NVIDIA Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/clk.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/io.h>
  22 #include <linux/list.h>
  23 #include <linux/module.h>
  24 #include <linux/of_device.h>
  25 #include <linux/of.h>
  26 #include <linux/slab.h>
  27
  28 #define CREATE_TRACE_POINTS
  29 #include <trace/events/host1x.h>
  30 #undef CREATE_TRACE_POINTS
  31
  32 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
  33 #include <asm/dma-iommu.h>
  34 #endif
  35
  36 #include "bus.h"
  37 #include "channel.h"
  38 #include "debug.h"
  39 #include "dev.h"
  40 #include "intr.h"
  41
  42 #include "hw/host1x01.h"
  43 #include "hw/host1x02.h"
  44 #include "hw/host1x04.h"
  45 #include "hw/host1x05.h"
  46 #include "hw/host1x06.h"
  47 #include "hw/host1x07.h"
  48
  49 void host1x_hypervisor_writel(struct host1x *host1x, u32 v, u32 r)
  50 {
  51         writel(v, host1x->hv_regs + r);
  52 }
  53
  54 u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r)
  55 {
  56         return readl(host1x->hv_regs + r);
  57 }
  58
  59 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
  60 {
  61         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  62
  63         writel(v, sync_regs + r);
  64 }
  65
  66 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
  67 {
  68         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  69
  70         return readl(sync_regs + r);
  71 }
  72
  73 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
  74 {
  75         writel(v, ch->regs + r);
  76 }
  77
  78 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
  79 {
  80         return readl(ch->regs + r);
  81 }
  82
  83 static const struct host1x_info host1x01_info = {
  84         .nb_channels = 8,
  85         .nb_pts = 32,
  86         .nb_mlocks = 16,
  87         .nb_bases = 8,
  88         .init = host1x01_init,
  89         .sync_offset = 0x3000,
  90         .dma_mask = DMA_BIT_MASK(32),
  91 };
  92
  93 static const struct host1x_info host1x02_info = {
  94         .nb_channels = 9,
  95         .nb_pts = 32,
  96         .nb_mlocks = 16,
  97         .nb_bases = 12,
  98         .init = host1x02_init,
  99         .sync_offset = 0x3000,
 100         .dma_mask = DMA_BIT_MASK(32),
 101 };
 102
 103 static const struct host1x_info host1x04_info = {
 104         .nb_channels = 12,
 105         .nb_pts = 192,
 106         .nb_mlocks = 16,
 107         .nb_bases = 64,
 108         .init = host1x04_init,
 109         .sync_offset = 0x2100,
 110         .dma_mask = DMA_BIT_MASK(34),
 111 };
 112
 113 static const struct host1x_info host1x05_info = {
 114         .nb_channels = 14,
 115         .nb_pts = 192,
 116         .nb_mlocks = 16,
 117         .nb_bases = 64,
 118         .init = host1x05_init,
 119         .sync_offset = 0x2100,
 120         .dma_mask = DMA_BIT_MASK(34),
 121 };
 122
 123 static const struct host1x_sid_entry tegra186_sid_table[] = {
 124         {
 125                 /* VIC */
 126                 .base = 0x1af0,
 127                 .offset = 0x30,
 128                 .limit = 0x34
 129         },
 130 };
 131
 132 static const struct host1x_info host1x06_info = {
 133         .nb_channels = 63,
 134         .nb_pts = 576,
 135         .nb_mlocks = 24,
 136         .nb_bases = 16,
 137         .init = host1x06_init,
 138         .sync_offset = 0x0,
 139         .dma_mask = DMA_BIT_MASK(40),
 140         .has_hypervisor = true,
 141         .num_sid_entries = ARRAY_SIZE(tegra186_sid_table),
 142         .sid_table = tegra186_sid_table,
 143 };
 144
 145 static const struct host1x_sid_entry tegra194_sid_table[] = {
 146         {
 147                 /* VIC */
 148                 .base = 0x1af0,
 149                 .offset = 0x30,
 150                 .limit = 0x34
 151         },
 152 };
 153
 154 static const struct host1x_info host1x07_info = {
 155         .nb_channels = 63,
 156         .nb_pts = 704,
 157         .nb_mlocks = 32,
 158         .nb_bases = 0,
 159         .init = host1x07_init,
 160         .sync_offset = 0x0,
 161         .dma_mask = DMA_BIT_MASK(40),
 162         .has_hypervisor = true,
 163         .num_sid_entries = ARRAY_SIZE(tegra194_sid_table),
 164         .sid_table = tegra194_sid_table,
 165 };
 166
 167 static const struct of_device_id host1x_of_match[] = {
 168         { .compatible = "nvidia,tegra194-host1x", .data = &host1x07_info, },
 169         { .compatible = "nvidia,tegra186-host1x", .data = &host1x06_info, },
 170         { .compatible = "nvidia,tegra210-host1x", .data = &host1x05_info, },
 171         { .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
 172         { .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
 173         { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
 174         { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
 175         { },
 176 };
 177 MODULE_DEVICE_TABLE(of, host1x_of_match);
 178
 179 static void host1x_setup_sid_table(struct host1x *host)
 180 {
 181         const struct host1x_info *info = host->info;
 182         unsigned int i;
 183
 184         for (i = 0; i < info->num_sid_entries; i++) {
 185                 const struct host1x_sid_entry *entry = &info->sid_table[i];
 186
 187                 host1x_hypervisor_writel(host, entry->offset, entry->base);
 188                 host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
 189         }
 190 }
 191
 192 static int host1x_probe(struct platform_device *pdev)
 193 {
 194         struct host1x *host;
 195         struct resource *regs, *hv_regs = NULL;
 196         int syncpt_irq;
 197         int err;
 198
 199         host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 200         if (!host)
 201                 return -ENOMEM;
 202
 203         host->info = of_device_get_match_data(&pdev->dev);
 204
 205         if (host->info->has_hypervisor) {
 206                 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vm");
 207                 if (!regs) {
 208                         dev_err(&pdev->dev, "failed to get vm registers\n");
 209                         return -ENXIO;
 210                 }
 211
 212                 hv_regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 213                                                        "hypervisor");
 214                 if (!hv_regs) {
 215                         dev_err(&pdev->dev,
 216                                 "failed to get hypervisor registers\n");
 217                         return -ENXIO;
 218                 }
 219         } else {
 220                 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 221                 if (!regs) {
 222                         dev_err(&pdev->dev, "failed to get registers\n");
 223                         return -ENXIO;
 224                 }
 225         }
 226
 227         syncpt_irq = platform_get_irq(pdev, 0);
 228         if (syncpt_irq < 0) {
 229                 dev_err(&pdev->dev, "failed to get IRQ: %d\n", syncpt_irq);
 230                 return syncpt_irq;
 231         }
 232
 233         mutex_init(&host->devices_lock);
 234         INIT_LIST_HEAD(&host->devices);
 235         INIT_LIST_HEAD(&host->list);
 236         host->dev = &pdev->dev;
 237
 238         /* set common host1x device data */
 239         platform_set_drvdata(pdev, host);
 240
 241         host->regs = devm_ioremap_resource(&pdev->dev, regs);
 242         if (IS_ERR(host->regs))
 243                 return PTR_ERR(host->regs);
 244
 245         if (host->info->has_hypervisor) {
 246                 host->hv_regs = devm_ioremap_resource(&pdev->dev, hv_regs);
 247                 if (IS_ERR(host->hv_regs))
 248                         return PTR_ERR(host->hv_regs);
 249         }
 250
 251         dma_set_mask_and_coherent(host->dev, host->info->dma_mask);
 252
 253         if (host->info->init) {
 254                 err = host->info->init(host);
 255                 if (err)
 256                         return err;
 257         }
 258
 259         host->clk = devm_clk_get(&pdev->dev, NULL);
 260         if (IS_ERR(host->clk)) {
 261                 dev_err(&pdev->dev, "failed to get clock\n");
 262                 err = PTR_ERR(host->clk);
 263                 return err;
 264         }
 265
 266         host->rst = devm_reset_control_get(&pdev->dev, "host1x");
 267         if (IS_ERR(host->rst)) {
 268                 err = PTR_ERR(host->rst);
 269                 dev_err(&pdev->dev, "failed to get reset: %d\n", err);
 270                 return err;
 271         }
 272 #if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
 273         if (host->dev->archdata.mapping) {
 274                 struct dma_iommu_mapping *mapping =
 275                                 to_dma_iommu_mapping(host->dev);
 276                 arm_iommu_detach_device(host->dev);
 277                 arm_iommu_release_mapping(mapping);
 278         }
 279 #endif
 280         if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
 281                 goto skip_iommu;
 282
 283         host->group = iommu_group_get(&pdev->dev);
 284         if (host->group) {
 285                 struct iommu_domain_geometry *geometry;
 286                 u64 mask = dma_get_mask(host->dev);
 287                 dma_addr_t start, end;
 288                 unsigned long order;
 289
 290                 err = iova_cache_get();
 291                 if (err < 0)
 292                         goto put_group;
 293
 294                 host->domain = iommu_domain_alloc(&platform_bus_type);
 295                 if (!host->domain) {
 296                         err = -ENOMEM;
 297                         goto put_cache;
 298                 }
 299
 300                 err = iommu_attach_group(host->domain, host->group);
 301                 if (err) {
 302                         if (err == -ENODEV) {
 303                                 iommu_domain_free(host->domain);
 304                                 host->domain = NULL;
 305                                 iova_cache_put();
 306                                 iommu_group_put(host->group);
 307                                 host->group = NULL;
 308                                 goto skip_iommu;
 309                         }
 310
 311                         goto fail_free_domain;
 312                 }
 313
 314                 geometry = &host->domain->geometry;
 315                 start = geometry->aperture_start & mask;
 316                 end = geometry->aperture_end & mask;
 317
 318                 order = __ffs(host->domain->pgsize_bitmap);
 319                 init_iova_domain(&host->iova, 1UL << order, start >> order);
 320                 host->iova_end = end;
 321         }
 322
 323 skip_iommu:
 324         err = host1x_channel_list_init(&host->channel_list,
 325                                        host->info->nb_channels);
 326         if (err) {
 327                 dev_err(&pdev->dev, "failed to initialize channel list\n");
 328                 goto fail_detach_device;
 329         }
 330
 331         err = clk_prepare_enable(host->clk);
 332         if (err < 0) {
 333                 dev_err(&pdev->dev, "failed to enable clock\n");
 334                 goto fail_free_channels;
 335         }
 336
 337         err = reset_control_deassert(host->rst);
 338         if (err < 0) {
 339                 dev_err(&pdev->dev, "failed to deassert reset: %d\n", err);
 340                 goto fail_unprepare_disable;
 341         }
 342
 343         err = host1x_syncpt_init(host);
 344         if (err) {
 345                 dev_err(&pdev->dev, "failed to initialize syncpts\n");
 346                 goto fail_reset_assert;
 347         }
 348
 349         err = host1x_intr_init(host, syncpt_irq);
 350         if (err) {
 351                 dev_err(&pdev->dev, "failed to initialize interrupts\n");
 352                 goto fail_deinit_syncpt;
 353         }
 354
 355         host1x_debug_init(host);
 356
 357         if (host->info->has_hypervisor)
 358                 host1x_setup_sid_table(host);
 359
 360         err = host1x_register(host);
 361         if (err < 0)
 362                 goto fail_deinit_intr;
 363
 364         return 0;
 365
 366 fail_deinit_intr:
 367         host1x_intr_deinit(host);
 368 fail_deinit_syncpt:
 369         host1x_syncpt_deinit(host);
 370 fail_reset_assert:
 371         reset_control_assert(host->rst);
 372 fail_unprepare_disable:
 373         clk_disable_unprepare(host->clk);
 374 fail_free_channels:
 375         host1x_channel_list_free(&host->channel_list);
 376 fail_detach_device:
 377         if (host->group && host->domain) {
 378                 put_iova_domain(&host->iova);
 379                 iommu_detach_group(host->domain, host->group);
 380         }
 381 fail_free_domain:
 382         if (host->domain)
 383                 iommu_domain_free(host->domain);
 384 put_cache:
 385         if (host->group)
 386                 iova_cache_put();
 387 put_group:
 388         iommu_group_put(host->group);
 389
 390         return err;
 391 }
 392
 393 static int host1x_remove(struct platform_device *pdev)
 394 {
 395         struct host1x *host = platform_get_drvdata(pdev);
 396
 397         host1x_unregister(host);
 398         host1x_intr_deinit(host);
 399         host1x_syncpt_deinit(host);
 400         reset_control_assert(host->rst);
 401         clk_disable_unprepare(host->clk);
 402
 403         if (host->domain) {
 404                 put_iova_domain(&host->iova);
 405                 iommu_detach_group(host->domain, host->group);
 406                 iommu_domain_free(host->domain);
 407                 iova_cache_put();
 408                 iommu_group_put(host->group);
 409         }
 410
 411         return 0;
 412 }
 413
 414 static struct platform_driver tegra_host1x_driver = {
 415         .driver = {
 416                 .name = "tegra-host1x",
 417                 .of_match_table = host1x_of_match,
 418         },
 419         .probe = host1x_probe,
 420         .remove = host1x_remove,
 421 };
 422
 423 static struct platform_driver * const drivers[] = {
 424         &tegra_host1x_driver,
 425         &tegra_mipi_driver,
 426 };
 427
 428 static int __init tegra_host1x_init(void)
 429 {
 430         int err;
 431
 432         err = bus_register(&host1x_bus_type);
 433         if (err < 0)
 434                 return err;
 435
 436         err = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 437         if (err < 0)
 438                 bus_unregister(&host1x_bus_type);
 439
 440         return err;
 441 }
 442 module_init(tegra_host1x_init);
 443
 444 static void __exit tegra_host1x_exit(void)
 445 {
 446         platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 447         bus_unregister(&host1x_bus_type);
 448 }
 449 module_exit(tegra_host1x_exit);
 450
 451 MODULE_AUTHOR("Thierry Reding <[email protected]>");
 452 MODULE_AUTHOR("Terje Bergstrom <[email protected]>");
 453 MODULE_DESCRIPTION("Host1x driver for Tegra products");
 454 MODULE_LICENSE("GPL");