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/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/reset.h>
  15
  16 #include <soc/tegra/powergate.h>
  17
  18 #include "drm.h"
  19 #include "gem.h"
  20 #include "gr3d.h"
  21
  22 struct gr3d {
  23         struct tegra_drm_client client;
  24         struct host1x_channel *channel;
  25         struct clk *clk_secondary;
  26         struct clk *clk;
  27         struct reset_control *rst_secondary;
  28         struct reset_control *rst;
  29
  30         DECLARE_BITMAP(addr_regs, GR3D_NUM_REGS);
  31 };
  32
  33 static inline struct gr3d *to_gr3d(struct tegra_drm_client *client)
  34 {
  35         return container_of(client, struct gr3d, client);
  36 }
  37
  38 static int gr3d_init(struct host1x_client *client)
  39 {
  40         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  41         struct drm_device *dev = dev_get_drvdata(client->parent);
  42         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
  43         struct gr3d *gr3d = to_gr3d(drm);
  44
  45         gr3d->channel = host1x_channel_request(client->dev);
  46         if (!gr3d->channel)
  47                 return -ENOMEM;
  48
  49         client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
  50         if (!client->syncpts[0]) {
  51                 host1x_channel_free(gr3d->channel);
  52                 return -ENOMEM;
  53         }
  54
  55         return tegra_drm_register_client(dev->dev_private, drm);
  56 }
  57
  58 static int gr3d_exit(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->parent);
  62         struct gr3d *gr3d = to_gr3d(drm);
  63         int err;
  64
  65         err = tegra_drm_unregister_client(dev->dev_private, drm);
  66         if (err < 0)
  67                 return err;
  68
  69         host1x_syncpt_free(client->syncpts[0]);
  70         host1x_channel_free(gr3d->channel);
  71
  72         return 0;
  73 }
  74
  75 static const struct host1x_client_ops gr3d_client_ops = {
  76         .init = gr3d_init,
  77         .exit = gr3d_exit,
  78 };
  79
  80 static int gr3d_open_channel(struct tegra_drm_client *client,
  81                              struct tegra_drm_context *context)
  82 {
  83         struct gr3d *gr3d = to_gr3d(client);
  84
  85         context->channel = host1x_channel_get(gr3d->channel);
  86         if (!context->channel)
  87                 return -ENOMEM;
  88
  89         return 0;
  90 }
  91
  92 static void gr3d_close_channel(struct tegra_drm_context *context)
  93 {
  94         host1x_channel_put(context->channel);
  95 }
  96
  97 static int gr3d_is_addr_reg(struct device *dev, u32 class, u32 offset)
  98 {
  99         struct gr3d *gr3d = dev_get_drvdata(dev);
 100
 101         switch (class) {
 102         case HOST1X_CLASS_HOST1X:
 103                 if (offset == 0x2b)
 104                         return 1;
 105
 106                 break;
 107
 108         case HOST1X_CLASS_GR3D:
 109                 if (offset >= GR3D_NUM_REGS)
 110                         break;
 111
 112                 if (test_bit(offset, gr3d->addr_regs))
 113                         return 1;
 114
 115                 break;
 116         }
 117
 118         return 0;
 119 }
 120
 121 static const struct tegra_drm_client_ops gr3d_ops = {
 122         .open_channel = gr3d_open_channel,
 123         .close_channel = gr3d_close_channel,
 124         .is_addr_reg = gr3d_is_addr_reg,
 125         .submit = tegra_drm_submit,
 126 };
 127
 128 static const struct of_device_id tegra_gr3d_match[] = {
 129         { .compatible = "nvidia,tegra114-gr3d" },
 130         { .compatible = "nvidia,tegra30-gr3d" },
 131         { .compatible = "nvidia,tegra20-gr3d" },
 132         { }
 133 };
 134
 135 static const u32 gr3d_addr_regs[] = {
 136         GR3D_IDX_ATTRIBUTE( 0),
 137         GR3D_IDX_ATTRIBUTE( 1),
 138         GR3D_IDX_ATTRIBUTE( 2),
 139         GR3D_IDX_ATTRIBUTE( 3),
 140         GR3D_IDX_ATTRIBUTE( 4),
 141         GR3D_IDX_ATTRIBUTE( 5),
 142         GR3D_IDX_ATTRIBUTE( 6),
 143         GR3D_IDX_ATTRIBUTE( 7),
 144         GR3D_IDX_ATTRIBUTE( 8),
 145         GR3D_IDX_ATTRIBUTE( 9),
 146         GR3D_IDX_ATTRIBUTE(10),
 147         GR3D_IDX_ATTRIBUTE(11),
 148         GR3D_IDX_ATTRIBUTE(12),
 149         GR3D_IDX_ATTRIBUTE(13),
 150         GR3D_IDX_ATTRIBUTE(14),
 151         GR3D_IDX_ATTRIBUTE(15),
 152         GR3D_IDX_INDEX_BASE,
 153         GR3D_QR_ZTAG_ADDR,
 154         GR3D_QR_CTAG_ADDR,
 155         GR3D_QR_CZ_ADDR,
 156         GR3D_TEX_TEX_ADDR( 0),
 157         GR3D_TEX_TEX_ADDR( 1),
 158         GR3D_TEX_TEX_ADDR( 2),
 159         GR3D_TEX_TEX_ADDR( 3),
 160         GR3D_TEX_TEX_ADDR( 4),
 161         GR3D_TEX_TEX_ADDR( 5),
 162         GR3D_TEX_TEX_ADDR( 6),
 163         GR3D_TEX_TEX_ADDR( 7),
 164         GR3D_TEX_TEX_ADDR( 8),
 165         GR3D_TEX_TEX_ADDR( 9),
 166         GR3D_TEX_TEX_ADDR(10),
 167         GR3D_TEX_TEX_ADDR(11),
 168         GR3D_TEX_TEX_ADDR(12),
 169         GR3D_TEX_TEX_ADDR(13),
 170         GR3D_TEX_TEX_ADDR(14),
 171         GR3D_TEX_TEX_ADDR(15),
 172         GR3D_DW_MEMORY_OUTPUT_ADDRESS,
 173         GR3D_GLOBAL_SURFADDR( 0),
 174         GR3D_GLOBAL_SURFADDR( 1),
 175         GR3D_GLOBAL_SURFADDR( 2),
 176         GR3D_GLOBAL_SURFADDR( 3),
 177         GR3D_GLOBAL_SURFADDR( 4),
 178         GR3D_GLOBAL_SURFADDR( 5),
 179         GR3D_GLOBAL_SURFADDR( 6),
 180         GR3D_GLOBAL_SURFADDR( 7),
 181         GR3D_GLOBAL_SURFADDR( 8),
 182         GR3D_GLOBAL_SURFADDR( 9),
 183         GR3D_GLOBAL_SURFADDR(10),
 184         GR3D_GLOBAL_SURFADDR(11),
 185         GR3D_GLOBAL_SURFADDR(12),
 186         GR3D_GLOBAL_SURFADDR(13),
 187         GR3D_GLOBAL_SURFADDR(14),
 188         GR3D_GLOBAL_SURFADDR(15),
 189         GR3D_GLOBAL_SPILLSURFADDR,
 190         GR3D_GLOBAL_SURFOVERADDR( 0),
 191         GR3D_GLOBAL_SURFOVERADDR( 1),
 192         GR3D_GLOBAL_SURFOVERADDR( 2),
 193         GR3D_GLOBAL_SURFOVERADDR( 3),
 194         GR3D_GLOBAL_SURFOVERADDR( 4),
 195         GR3D_GLOBAL_SURFOVERADDR( 5),
 196         GR3D_GLOBAL_SURFOVERADDR( 6),
 197         GR3D_GLOBAL_SURFOVERADDR( 7),
 198         GR3D_GLOBAL_SURFOVERADDR( 8),
 199         GR3D_GLOBAL_SURFOVERADDR( 9),
 200         GR3D_GLOBAL_SURFOVERADDR(10),
 201         GR3D_GLOBAL_SURFOVERADDR(11),
 202         GR3D_GLOBAL_SURFOVERADDR(12),
 203         GR3D_GLOBAL_SURFOVERADDR(13),
 204         GR3D_GLOBAL_SURFOVERADDR(14),
 205         GR3D_GLOBAL_SURFOVERADDR(15),
 206         GR3D_GLOBAL_SAMP01SURFADDR( 0),
 207         GR3D_GLOBAL_SAMP01SURFADDR( 1),
 208         GR3D_GLOBAL_SAMP01SURFADDR( 2),
 209         GR3D_GLOBAL_SAMP01SURFADDR( 3),
 210         GR3D_GLOBAL_SAMP01SURFADDR( 4),
 211         GR3D_GLOBAL_SAMP01SURFADDR( 5),
 212         GR3D_GLOBAL_SAMP01SURFADDR( 6),
 213         GR3D_GLOBAL_SAMP01SURFADDR( 7),
 214         GR3D_GLOBAL_SAMP01SURFADDR( 8),
 215         GR3D_GLOBAL_SAMP01SURFADDR( 9),
 216         GR3D_GLOBAL_SAMP01SURFADDR(10),
 217         GR3D_GLOBAL_SAMP01SURFADDR(11),
 218         GR3D_GLOBAL_SAMP01SURFADDR(12),
 219         GR3D_GLOBAL_SAMP01SURFADDR(13),
 220         GR3D_GLOBAL_SAMP01SURFADDR(14),
 221         GR3D_GLOBAL_SAMP01SURFADDR(15),
 222         GR3D_GLOBAL_SAMP23SURFADDR( 0),
 223         GR3D_GLOBAL_SAMP23SURFADDR( 1),
 224         GR3D_GLOBAL_SAMP23SURFADDR( 2),
 225         GR3D_GLOBAL_SAMP23SURFADDR( 3),
 226         GR3D_GLOBAL_SAMP23SURFADDR( 4),
 227         GR3D_GLOBAL_SAMP23SURFADDR( 5),
 228         GR3D_GLOBAL_SAMP23SURFADDR( 6),
 229         GR3D_GLOBAL_SAMP23SURFADDR( 7),
 230         GR3D_GLOBAL_SAMP23SURFADDR( 8),
 231         GR3D_GLOBAL_SAMP23SURFADDR( 9),
 232         GR3D_GLOBAL_SAMP23SURFADDR(10),
 233         GR3D_GLOBAL_SAMP23SURFADDR(11),
 234         GR3D_GLOBAL_SAMP23SURFADDR(12),
 235         GR3D_GLOBAL_SAMP23SURFADDR(13),
 236         GR3D_GLOBAL_SAMP23SURFADDR(14),
 237         GR3D_GLOBAL_SAMP23SURFADDR(15),
 238 };
 239
 240 static int gr3d_probe(struct platform_device *pdev)
 241 {
 242         struct device_node *np = pdev->dev.of_node;
 243         struct host1x_syncpt **syncpts;
 244         struct gr3d *gr3d;
 245         unsigned int i;
 246         int err;
 247
 248         gr3d = devm_kzalloc(&pdev->dev, sizeof(*gr3d), GFP_KERNEL);
 249         if (!gr3d)
 250                 return -ENOMEM;
 251
 252         syncpts = devm_kzalloc(&pdev->dev, sizeof(*syncpts), GFP_KERNEL);
 253         if (!syncpts)
 254                 return -ENOMEM;
 255
 256         gr3d->clk = devm_clk_get(&pdev->dev, NULL);
 257         if (IS_ERR(gr3d->clk)) {
 258                 dev_err(&pdev->dev, "cannot get clock\n");
 259                 return PTR_ERR(gr3d->clk);
 260         }
 261
 262         gr3d->rst = devm_reset_control_get(&pdev->dev, "3d");
 263         if (IS_ERR(gr3d->rst)) {
 264                 dev_err(&pdev->dev, "cannot get reset\n");
 265                 return PTR_ERR(gr3d->rst);
 266         }
 267
 268         if (of_device_is_compatible(np, "nvidia,tegra30-gr3d")) {
 269                 gr3d->clk_secondary = devm_clk_get(&pdev->dev, "3d2");
 270                 if (IS_ERR(gr3d->clk)) {
 271                         dev_err(&pdev->dev, "cannot get secondary clock\n");
 272                         return PTR_ERR(gr3d->clk);
 273                 }
 274
 275                 gr3d->rst_secondary = devm_reset_control_get(&pdev->dev,
 276                                                                 "3d2");
 277                 if (IS_ERR(gr3d->rst_secondary)) {
 278                         dev_err(&pdev->dev, "cannot get secondary reset\n");
 279                         return PTR_ERR(gr3d->rst_secondary);
 280                 }
 281         }
 282
 283         err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D, gr3d->clk,
 284                                                 gr3d->rst);
 285         if (err < 0) {
 286                 dev_err(&pdev->dev, "failed to power up 3D unit\n");
 287                 return err;
 288         }
 289
 290         if (gr3d->clk_secondary) {
 291                 err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_3D1,
 292                                                         gr3d->clk_secondary,
 293                                                         gr3d->rst_secondary);
 294                 if (err < 0) {
 295                         dev_err(&pdev->dev,
 296                                 "failed to power up secondary 3D unit\n");
 297                         return err;
 298                 }
 299         }
 300
 301         INIT_LIST_HEAD(&gr3d->client.base.list);
 302         gr3d->client.base.ops = &gr3d_client_ops;
 303         gr3d->client.base.dev = &pdev->dev;
 304         gr3d->client.base.class = HOST1X_CLASS_GR3D;
 305         gr3d->client.base.syncpts = syncpts;
 306         gr3d->client.base.num_syncpts = 1;
 307
 308         INIT_LIST_HEAD(&gr3d->client.list);
 309         gr3d->client.ops = &gr3d_ops;
 310
 311         err = host1x_client_register(&gr3d->client.base);
 312         if (err < 0) {
 313                 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
 314                         err);
 315                 return err;
 316         }
 317
 318         /* initialize address register map */
 319         for (i = 0; i < ARRAY_SIZE(gr3d_addr_regs); i++)
 320                 set_bit(gr3d_addr_regs[i], gr3d->addr_regs);
 321
 322         platform_set_drvdata(pdev, gr3d);
 323
 324         return 0;
 325 }
 326
 327 static int gr3d_remove(struct platform_device *pdev)
 328 {
 329         struct gr3d *gr3d = platform_get_drvdata(pdev);
 330         int err;
 331
 332         err = host1x_client_unregister(&gr3d->client.base);
 333         if (err < 0) {
 334                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 335                         err);
 336                 return err;
 337         }
 338
 339         if (gr3d->clk_secondary) {
 340                 tegra_powergate_power_off(TEGRA_POWERGATE_3D1);
 341                 clk_disable_unprepare(gr3d->clk_secondary);
 342         }
 343
 344         tegra_powergate_power_off(TEGRA_POWERGATE_3D);
 345         clk_disable_unprepare(gr3d->clk);
 346
 347         return 0;
 348 }
 349
 350 struct platform_driver tegra_gr3d_driver = {
 351         .driver = {
 352                 .name = "tegra-gr3d",
 353                 .of_match_table = tegra_gr3d_match,
 354         },
 355         .probe = gr3d_probe,
 356         .remove = gr3d_remove,
 357 };