drivers/gpu/drm/tegra/gr2d.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2012-2013, NVIDIA Corporation.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/iommu.h>
   8 #include <linux/module.h>
   9 #include <linux/of_device.h>
  10
  11 #include "drm.h"
  12 #include "gem.h"
  13 #include "gr2d.h"
  14
  15 struct gr2d_soc {
  16         unsigned int version;
  17 };
  18
  19 struct gr2d {
  20         struct tegra_drm_client client;
  21         struct host1x_channel *channel;
  22         struct clk *clk;
  23
  24         const struct gr2d_soc *soc;
  25
  26         DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
  27 };
  28
  29 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
  30 {
  31         return container_of(client, struct gr2d, client);
  32 }
  33
  34 static int gr2d_init(struct host1x_client *client)
  35 {
  36         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  37         struct drm_device *dev = dev_get_drvdata(client->host);
  38         unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
  39         struct gr2d *gr2d = to_gr2d(drm);
  40         int err;
  41
  42         gr2d->channel = host1x_channel_request(client);
  43         if (!gr2d->channel)
  44                 return -ENOMEM;
  45
  46         client->syncpts[0] = host1x_syncpt_request(client, flags);
  47         if (!client->syncpts[0]) {
  48                 err = -ENOMEM;
  49                 dev_err(client->dev, "failed to request syncpoint: %d\n", err);
  50                 goto put;
  51         }
  52
  53         err = host1x_client_iommu_attach(client);
  54         if (err < 0) {
  55                 dev_err(client->dev, "failed to attach to domain: %d\n", err);
  56                 goto free;
  57         }
  58
  59         err = tegra_drm_register_client(dev->dev_private, drm);
  60         if (err < 0) {
  61                 dev_err(client->dev, "failed to register client: %d\n", err);
  62                 goto detach;
  63         }
  64
  65         return 0;
  66
  67 detach:
  68         host1x_client_iommu_detach(client);
  69 free:
  70         host1x_syncpt_free(client->syncpts[0]);
  71 put:
  72         host1x_channel_put(gr2d->channel);
  73         return err;
  74 }
  75
  76 static int gr2d_exit(struct host1x_client *client)
  77 {
  78         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  79         struct drm_device *dev = dev_get_drvdata(client->host);
  80         struct tegra_drm *tegra = dev->dev_private;
  81         struct gr2d *gr2d = to_gr2d(drm);
  82         int err;
  83
  84         err = tegra_drm_unregister_client(tegra, drm);
  85         if (err < 0)
  86                 return err;
  87
  88         host1x_client_iommu_detach(client);
  89         host1x_syncpt_free(client->syncpts[0]);
  90         host1x_channel_put(gr2d->channel);
  91
  92         return 0;
  93 }
  94
  95 static const struct host1x_client_ops gr2d_client_ops = {
  96         .init = gr2d_init,
  97         .exit = gr2d_exit,
  98 };
  99
 100 static int gr2d_open_channel(struct tegra_drm_client *client,
 101                              struct tegra_drm_context *context)
 102 {
 103         struct gr2d *gr2d = to_gr2d(client);
 104
 105         context->channel = host1x_channel_get(gr2d->channel);
 106         if (!context->channel)
 107                 return -ENOMEM;
 108
 109         return 0;
 110 }
 111
 112 static void gr2d_close_channel(struct tegra_drm_context *context)
 113 {
 114         host1x_channel_put(context->channel);
 115 }
 116
 117 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
 118 {
 119         struct gr2d *gr2d = dev_get_drvdata(dev);
 120
 121         switch (class) {
 122         case HOST1X_CLASS_HOST1X:
 123                 if (offset == 0x2b)
 124                         return 1;
 125
 126                 break;
 127
 128         case HOST1X_CLASS_GR2D:
 129         case HOST1X_CLASS_GR2D_SB:
 130                 if (offset >= GR2D_NUM_REGS)
 131                         break;
 132
 133                 if (test_bit(offset, gr2d->addr_regs))
 134                         return 1;
 135
 136                 break;
 137         }
 138
 139         return 0;
 140 }
 141
 142 static int gr2d_is_valid_class(u32 class)
 143 {
 144         return (class == HOST1X_CLASS_GR2D ||
 145                 class == HOST1X_CLASS_GR2D_SB);
 146 }
 147
 148 static const struct tegra_drm_client_ops gr2d_ops = {
 149         .open_channel = gr2d_open_channel,
 150         .close_channel = gr2d_close_channel,
 151         .is_addr_reg = gr2d_is_addr_reg,
 152         .is_valid_class = gr2d_is_valid_class,
 153         .submit = tegra_drm_submit,
 154 };
 155
 156 static const struct gr2d_soc tegra20_gr2d_soc = {
 157         .version = 0x20,
 158 };
 159
 160 static const struct gr2d_soc tegra30_gr2d_soc = {
 161         .version = 0x30,
 162 };
 163
 164 static const struct of_device_id gr2d_match[] = {
 165         { .compatible = "nvidia,tegra30-gr2d", .data = &tegra20_gr2d_soc },
 166         { .compatible = "nvidia,tegra20-gr2d", .data = &tegra30_gr2d_soc },
 167         { },
 168 };
 169 MODULE_DEVICE_TABLE(of, gr2d_match);
 170
 171 static const u32 gr2d_addr_regs[] = {
 172         GR2D_UA_BASE_ADDR,
 173         GR2D_VA_BASE_ADDR,
 174         GR2D_PAT_BASE_ADDR,
 175         GR2D_DSTA_BASE_ADDR,
 176         GR2D_DSTB_BASE_ADDR,
 177         GR2D_DSTC_BASE_ADDR,
 178         GR2D_SRCA_BASE_ADDR,
 179         GR2D_SRCB_BASE_ADDR,
 180         GR2D_SRC_BASE_ADDR_SB,
 181         GR2D_DSTA_BASE_ADDR_SB,
 182         GR2D_DSTB_BASE_ADDR_SB,
 183         GR2D_UA_BASE_ADDR_SB,
 184         GR2D_VA_BASE_ADDR_SB,
 185 };
 186
 187 static int gr2d_probe(struct platform_device *pdev)
 188 {
 189         struct device *dev = &pdev->dev;
 190         struct host1x_syncpt **syncpts;
 191         struct gr2d *gr2d;
 192         unsigned int i;
 193         int err;
 194
 195         gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
 196         if (!gr2d)
 197                 return -ENOMEM;
 198
 199         gr2d->soc = of_device_get_match_data(dev);
 200
 201         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
 202         if (!syncpts)
 203                 return -ENOMEM;
 204
 205         gr2d->clk = devm_clk_get(dev, NULL);
 206         if (IS_ERR(gr2d->clk)) {
 207                 dev_err(dev, "cannot get clock\n");
 208                 return PTR_ERR(gr2d->clk);
 209         }
 210
 211         err = clk_prepare_enable(gr2d->clk);
 212         if (err) {
 213                 dev_err(dev, "cannot turn on clock\n");
 214                 return err;
 215         }
 216
 217         INIT_LIST_HEAD(&gr2d->client.base.list);
 218         gr2d->client.base.ops = &gr2d_client_ops;
 219         gr2d->client.base.dev = dev;
 220         gr2d->client.base.class = HOST1X_CLASS_GR2D;
 221         gr2d->client.base.syncpts = syncpts;
 222         gr2d->client.base.num_syncpts = 1;
 223
 224         INIT_LIST_HEAD(&gr2d->client.list);
 225         gr2d->client.version = gr2d->soc->version;
 226         gr2d->client.ops = &gr2d_ops;
 227
 228         err = host1x_client_register(&gr2d->client.base);
 229         if (err < 0) {
 230                 dev_err(dev, "failed to register host1x client: %d\n", err);
 231                 clk_disable_unprepare(gr2d->clk);
 232                 return err;
 233         }
 234
 235         /* initialize address register map */
 236         for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
 237                 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
 238
 239         platform_set_drvdata(pdev, gr2d);
 240
 241         return 0;
 242 }
 243
 244 static int gr2d_remove(struct platform_device *pdev)
 245 {
 246         struct gr2d *gr2d = platform_get_drvdata(pdev);
 247         int err;
 248
 249         err = host1x_client_unregister(&gr2d->client.base);
 250         if (err < 0) {
 251                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 252                         err);
 253                 return err;
 254         }
 255
 256         clk_disable_unprepare(gr2d->clk);
 257
 258         return 0;
 259 }
 260
 261 struct platform_driver tegra_gr2d_driver = {
 262         .driver = {
 263                 .name = "tegra-gr2d",
 264                 .of_match_table = gr2d_match,
 265         },
 266         .probe = gr2d_probe,
 267         .remove = gr2d_remove,
 268 };