drivers/gpu/drm/tegra/gr3d.c

   1 /*
   2  * Copyright (C) 2013 Avionic Design GmbH
   3  * Copyright (C) 2013 NVIDIA Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/host1x.h>
  12 #include <linux/iommu.h>
  13 #include <linux/module.h>
  14 #include <linux/of_device.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/reset.h>
  17
  18 #include <soc/tegra/pmc.h>
  19
  20 #include "drm.h"
  21 #include "gem.h"
  22 #include "gr3d.h"
  23
  24 struct gr3d_soc {
  25         unsigned int version;
  26 };
  27
  28 struct gr3d {
  29         struct iommu_group *group;
  30         struct tegra_drm_client client;
  31         struct host1x_channel *channel;
  32         struct clk *clk_secondary;
  33         struct clk *clk;
  34         struct reset_control *rst_secondary;
  35         struct reset_control *rst;
  36
  37         const struct gr3d_soc *soc;
  38
  39         DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
  40 };
  41
  42 static inline struct gr3d *to_gr3d(struct tegra_drm_client *client)
  43 {
  44         return container_of(client, struct gr3d, client);
  45 }
  46
  47 static int gr3d_init(struct host1x_client *client)
  48 {
  49         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  50         struct drm_device *dev = dev_get_drvdata(client->parent);
  51         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
  52         struct gr3d *gr3d = to_gr3d(drm);
  53         int err;
  54
  55         gr3d->channel = host1x_channel_request(client->dev);
  56         if (!gr3d->channel)
  57                 return -ENOMEM;
  58
  59         client->syncpts[0] = host1x_syncpt_request(client, flags);
  60         if (!client->syncpts[0]) {
  61                 err = -ENOMEM;
  62                 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
  63                 goto put;
  64         }
  65
  66         gr3d->group = host1x_client_iommu_attach(client, false);
  67         if (IS_ERR(gr3d->group)) {
  68                 err = PTR_ERR(gr3d->group);
  69                 dev_err(client->dev, "failed to attach to domain: %d\n", err);
  70                 goto free;
  71         }
  72
  73         err = tegra_drm_register_client(dev->dev_private, drm);
  74         if (err < 0) {
  75                 dev_err(client->dev, "failed to register client: %d\n", err);
  76                 goto detach;
  77         }
  78
  79         return 0;
  80
  81 detach:
  82         host1x_client_iommu_detach(client, gr3d->group);
  83 free:
  84         host1x_syncpt_free(client->syncpts[0]);
  85 put:
  86         host1x_channel_put(gr3d->channel);
  87         return err;
  88 }
  89
  90 static int gr3d_exit(struct host1x_client *client)
  91 {
  92         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  93         struct drm_device *dev = dev_get_drvdata(client->parent);
  94         struct gr3d *gr3d = to_gr3d(drm);
  95         int err;
  96
  97         err = tegra_drm_unregister_client(dev->dev_private, drm);
  98         if (err < 0)
  99                 return err;
 100
 101         host1x_client_iommu_detach(client, gr3d->group);
 102         host1x_syncpt_free(client->syncpts[0]);
 103         host1x_channel_put(gr3d->channel);
 104
 105         return 0;
 106 }
 107
 108 static const struct host1x_client_ops gr3d_client_ops = {
 109         .init = gr3d_init,
 110         .exit = gr3d_exit,
 111 };
 112
 113 static int gr3d_open_channel(struct tegra_drm_client *client,
 114                              struct tegra_drm_context *context)
 115 {
 116         struct gr3d *gr3d = to_gr3d(client);
 117
 118         context->channel = host1x_channel_get(gr3d->channel);
 119         if (!context->channel)
 120                 return -ENOMEM;
 121
 122         return 0;
 123 }
 124
 125 static void gr3d_close_channel(struct tegra_drm_context *context)
 126 {
 127         host1x_channel_put(context->channel);
 128 }
 129
 130 static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset)
 131 {
 132         struct gr3d *gr3d = dev_get_drvdata(dev);
 133
 134         switch (class) {
 135         case HOST1X_CLASS_HOST1X:
 136                 if (offset == 0x2b)
 137                         return 1;
 138
 139                 break;
 140
 141         case HOST1X_CLASS_GR3D:
 142                 if (offset >= GR3D_NUM_REGS)
 143                         break;
 144
 145                 if (test_bit(offset, gr3d->addr_regs))
 146                         return 1;
 147
 148                 break;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static const struct tegra_drm_client_ops gr3d_ops = {
 155         .open_channel = gr3d_open_channel,
 156         .close_channel = gr3d_close_channel,
 157         .is_addr_reg = gr3d_is_addr_reg,
 158         .submit = tegra_drm_submit,
 159 };
 160
 161 static const struct gr3d_soc tegra20_gr3d_soc = {
 162         .version = 0x20,
 163 };
 164
 165 static const struct gr3d_soc tegra30_gr3d_soc = {
 166         .version = 0x30,
 167 };
 168
 169 static const struct gr3d_soc tegra114_gr3d_soc = {
 170         .version = 0x35,
 171 };
 172
 173 static const struct of_device_id tegra_gr3d_match[] = {
 174         { .compatible = "nvidia,tegra114-gr3d", .data = &tegra114_gr3d_soc },
 175         { .compatible = "nvidia,tegra30-gr3d", .data = &tegra30_gr3d_soc },
 176         { .compatible = "nvidia,tegra20-gr3d", .data = &tegra20_gr3d_soc },
 177         { }
 178 };
 179 MODULE_DEVICE_TABLE(of, tegra_gr3d_match);
 180
 181 static const u32 gr3d_addr_regs[] = {
 182         GR3D_IDX_ATTRIBUTE( 0),
 183         GR3D_IDX_ATTRIBUTE( 1),
 184         GR3D_IDX_ATTRIBUTE( 2),
 185         GR3D_IDX_ATTRIBUTE( 3),
 186         GR3D_IDX_ATTRIBUTE( 4),
 187         GR3D_IDX_ATTRIBUTE( 5),
 188         GR3D_IDX_ATTRIBUTE( 6),
 189         GR3D_IDX_ATTRIBUTE( 7),
 190         GR3D_IDX_ATTRIBUTE( 8),
 191         GR3D_IDX_ATTRIBUTE( 9),
 192         GR3D_IDX_ATTRIBUTE(10),
 193         GR3D_IDX_ATTRIBUTE(11),
 194         GR3D_IDX_ATTRIBUTE(12),
 195         GR3D_IDX_ATTRIBUTE(13),
 196         GR3D_IDX_ATTRIBUTE(14),
 197         GR3D_IDX_ATTRIBUTE(15),
 198         GR3D_IDX_INDEX_BASE,
 199         GR3D_QR_ZTAG_ADDR,
 200         GR3D_QR_CTAG_ADDR,
 201         GR3D_QR_CZ_ADDR,
 202         GR3D_TEX_TEX_ADDR( 0),
 203         GR3D_TEX_TEX_ADDR( 1),
 204         GR3D_TEX_TEX_ADDR( 2),
 205         GR3D_TEX_TEX_ADDR( 3),
 206         GR3D_TEX_TEX_ADDR( 4),
 207         GR3D_TEX_TEX_ADDR( 5),
 208         GR3D_TEX_TEX_ADDR( 6),
 209         GR3D_TEX_TEX_ADDR( 7),
 210         GR3D_TEX_TEX_ADDR( 8),
 211         GR3D_TEX_TEX_ADDR( 9),
 212         GR3D_TEX_TEX_ADDR(10),
 213         GR3D_TEX_TEX_ADDR(11),
 214         GR3D_TEX_TEX_ADDR(12),
 215         GR3D_TEX_TEX_ADDR(13),
 216         GR3D_TEX_TEX_ADDR(14),
 217         GR3D_TEX_TEX_ADDR(15),
 218         GR3D_DW_MEMORY_OUTPUT_ADDRESS,
 219         GR3D_GLOBAL_SURFADDR( 0),
 220         GR3D_GLOBAL_SURFADDR( 1),
 221         GR3D_GLOBAL_SURFADDR( 2),
 222         GR3D_GLOBAL_SURFADDR( 3),
 223         GR3D_GLOBAL_SURFADDR( 4),
 224         GR3D_GLOBAL_SURFADDR( 5),
 225         GR3D_GLOBAL_SURFADDR( 6),
 226         GR3D_GLOBAL_SURFADDR( 7),
 227         GR3D_GLOBAL_SURFADDR( 8),
 228         GR3D_GLOBAL_SURFADDR( 9),
 229         GR3D_GLOBAL_SURFADDR(10),
 230         GR3D_GLOBAL_SURFADDR(11),
 231         GR3D_GLOBAL_SURFADDR(12),
 232         GR3D_GLOBAL_SURFADDR(13),
 233         GR3D_GLOBAL_SURFADDR(14),
 234         GR3D_GLOBAL_SURFADDR(15),
 235         GR3D_GLOBAL_SPILLSURFADDR,
 236         GR3D_GLOBAL_SURFOVERADDR( 0),
 237         GR3D_GLOBAL_SURFOVERADDR( 1),
 238         GR3D_GLOBAL_SURFOVERADDR( 2),
 239         GR3D_GLOBAL_SURFOVERADDR( 3),
 240         GR3D_GLOBAL_SURFOVERADDR( 4),
 241         GR3D_GLOBAL_SURFOVERADDR( 5),
 242         GR3D_GLOBAL_SURFOVERADDR( 6),
 243         GR3D_GLOBAL_SURFOVERADDR( 7),
 244         GR3D_GLOBAL_SURFOVERADDR( 8),
 245         GR3D_GLOBAL_SURFOVERADDR( 9),
 246         GR3D_GLOBAL_SURFOVERADDR(10),
 247         GR3D_GLOBAL_SURFOVERADDR(11),
 248         GR3D_GLOBAL_SURFOVERADDR(12),
 249         GR3D_GLOBAL_SURFOVERADDR(13),
 250         GR3D_GLOBAL_SURFOVERADDR(14),
 251         GR3D_GLOBAL_SURFOVERADDR(15),
 252         GR3D_GLOBAL_SAMP01SURFADDR( 0),
 253         GR3D_GLOBAL_SAMP01SURFADDR( 1),
 254         GR3D_GLOBAL_SAMP01SURFADDR( 2),
 255         GR3D_GLOBAL_SAMP01SURFADDR( 3),
 256         GR3D_GLOBAL_SAMP01SURFADDR( 4),
 257         GR3D_GLOBAL_SAMP01SURFADDR( 5),
 258         GR3D_GLOBAL_SAMP01SURFADDR( 6),
 259         GR3D_GLOBAL_SAMP01SURFADDR( 7),
 260         GR3D_GLOBAL_SAMP01SURFADDR( 8),
 261         GR3D_GLOBAL_SAMP01SURFADDR( 9),
 262         GR3D_GLOBAL_SAMP01SURFADDR(10),
 263         GR3D_GLOBAL_SAMP01SURFADDR(11),
 264         GR3D_GLOBAL_SAMP01SURFADDR(12),
 265         GR3D_GLOBAL_SAMP01SURFADDR(13),
 266         GR3D_GLOBAL_SAMP01SURFADDR(14),
 267         GR3D_GLOBAL_SAMP01SURFADDR(15),
 268         GR3D_GLOBAL_SAMP23SURFADDR( 0),
 269         GR3D_GLOBAL_SAMP23SURFADDR( 1),
 270         GR3D_GLOBAL_SAMP23SURFADDR( 2),
 271         GR3D_GLOBAL_SAMP23SURFADDR( 3),
 272         GR3D_GLOBAL_SAMP23SURFADDR( 4),
 273         GR3D_GLOBAL_SAMP23SURFADDR( 5),
 274         GR3D_GLOBAL_SAMP23SURFADDR( 6),
 275         GR3D_GLOBAL_SAMP23SURFADDR( 7),
 276         GR3D_GLOBAL_SAMP23SURFADDR( 8),
 277         GR3D_GLOBAL_SAMP23SURFADDR( 9),
 278         GR3D_GLOBAL_SAMP23SURFADDR(10),
 279         GR3D_GLOBAL_SAMP23SURFADDR(11),
 280         GR3D_GLOBAL_SAMP23SURFADDR(12),
 281         GR3D_GLOBAL_SAMP23SURFADDR(13),
 282         GR3D_GLOBAL_SAMP23SURFADDR(14),
 283         GR3D_GLOBAL_SAMP23SURFADDR(15),
 284 };
 285
 286 static int gr3d_probe(struct platform_device *pdev)
 287 {
 288         struct device_node *np = pdev->dev.of_node;
 289         struct host1x_syncpt **syncpts;
 290         struct gr3d *gr3d;
 291         unsigned int i;
 292         int err;
 293
 294         gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL);
 295         if (!gr3d)
 296                 return -ENOMEM;
 297
 298         gr3d->soc = of_device_get_match_data(&pdev->dev);
 299
 300         syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL);
 301         if (!syncpts)
 302                 return -ENOMEM;
 303
 304         gr3d->clk = devm_clk_get(&pdev->dev, NULL);
 305         if (IS_ERR(gr3d->clk)) {
 306                 dev_err(&pdev->dev, "cannot get clock\n");
 307                 return PTR_ERR(gr3d->clk);
 308         }
 309
 310         gr3d->rst = devm_reset_control_get(&pdev->dev, "3d");
 311         if (IS_ERR(gr3d->rst)) {
 312                 dev_err(&pdev->dev, "cannot get reset\n");
 313                 return PTR_ERR(gr3d->rst);
 314         }
 315
 316         if (of_device_is_compatible(np, "nvidia,tegra30-gr3d")) {
 317                 gr3d->clk_secondary = devm_clk_get(&pdev->dev, "3d2");
 318                 if (IS_ERR(gr3d->clk_secondary)) {
 319                         dev_err(&pdev->dev, "cannot get secondary clock\n");
 320                         return PTR_ERR(gr3d->clk_secondary);
 321                 }
 322
 323                 gr3d->rst_secondary = devm_reset_control_get(&pdev->dev,
 324                                                                 "3d2");
 325                 if (IS_ERR(gr3d->rst_secondary)) {
 326                         dev_err(&pdev->dev, "cannot get secondary reset\n");
 327                         return PTR_ERR(gr3d->rst_secondary);
 328                 }
 329         }
 330
 331         err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D, gr3d->clk,
 332                                                 gr3d->rst);
 333         if (err < 0) {
 334                 dev_err(&pdev->dev, "failed to power up 3D unit\n");
 335                 return err;
 336         }
 337
 338         if (gr3d->clk_secondary) {
 339                 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D1,
 340                                                         gr3d->clk_secondary,
 341                                                         gr3d->rst_secondary);
 342                 if (err < 0) {
 343                         dev_err(&pdev->dev,
 344                                 "failed to power up secondary 3D unit\n");
 345                         return err;
 346                 }
 347         }
 348
 349         INIT_LIST_HEAD(&gr3d->client.base.list);
 350         gr3d->client.base.ops = &gr3d_client_ops;
 351         gr3d->client.base.dev = &pdev->dev;
 352         gr3d->client.base.class = HOST1X_CLASS_GR3D;
 353         gr3d->client.base.syncpts = syncpts;
 354         gr3d->client.base.num_syncpts = 1;
 355
 356         INIT_LIST_HEAD(&gr3d->client.list);
 357         gr3d->client.version = gr3d->soc->version;
 358         gr3d->client.ops = &gr3d_ops;
 359
 360         err = host1x_client_register(&gr3d->client.base);
 361         if (err < 0) {
 362                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
 363                         err);
 364                 return err;
 365         }
 366
 367         /* initialize address register map */
 368         for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++)
 369                 set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
 370
 371         platform_set_drvdata(pdev, gr3d);
 372
 373         return 0;
 374 }
 375
 376 static int gr3d_remove(struct platform_device *pdev)
 377 {
 378         struct gr3d *gr3d = platform_get_drvdata(pdev);
 379         int err;
 380
 381         err = host1x_client_unregister(&gr3d->client.base);
 382         if (err < 0) {
 383                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 384                         err);
 385                 return err;
 386         }
 387
 388         if (gr3d->clk_secondary) {
 389                 tegra_powergate_power_off(TEGRA_POWERGATE_3D1);
 390                 clk_disable_unprepare(gr3d->clk_secondary);
 391         }
 392
 393         tegra_powergate_power_off(TEGRA_POWERGATE_3D);
 394         clk_disable_unprepare(gr3d->clk);
 395
 396         return 0;
 397 }
 398
 399 struct platform_driver tegra_gr3d_driver = {
 400         .driver = {
 401                 .name = "tegra-gr3d",
 402                 .of_match_table = tegra_gr3d_match,
 403         },
 404         .probe = gr3d_probe,
 405         .remove = gr3d_remove,
 406 };