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/of_device.h>
   9
  10 #include "drm.h"
  11 #include "gem.h"
  12 #include "gr2d.h"
  13
  14 struct gr2d_soc {
  15         unsigned int version;
  16 };
  17
  18 struct gr2d {
  19         struct iommu_group *group;
  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->parent);
  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->dev);
  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         gr2d->group = host1x_client_iommu_attach(client, false);
  54         if (IS_ERR(gr2d->group)) {
  55                 err = PTR_ERR(gr2d->group);
  56                 dev_err(client->dev, "failed to attach to domain: %d\n", err);
  57                 goto free;
  58         }
  59
  60         err = tegra_drm_register_client(dev->dev_private, drm);
  61         if (err < 0) {
  62                 dev_err(client->dev, "failed to register client: %d\n", err);
  63                 goto detach;
  64         }
  65
  66         return 0;
  67
  68 detach:
  69         host1x_client_iommu_detach(client, gr2d->group);
  70 free:
  71         host1x_syncpt_free(client->syncpts[0]);
  72 put:
  73         host1x_channel_put(gr2d->channel);
  74         return err;
  75 }
  76
  77 static int gr2d_exit(struct host1x_client *client)
  78 {
  79         struct tegra_drm_client *drm = host1x_to_drm_client(client);
  80         struct drm_device *dev = dev_get_drvdata(client->parent);
  81         struct tegra_drm *tegra = dev->dev_private;
  82         struct gr2d *gr2d = to_gr2d(drm);
  83         int err;
  84
  85         err = tegra_drm_unregister_client(tegra, drm);
  86         if (err < 0)
  87                 return err;
  88
  89         host1x_client_iommu_detach(client, gr2d->group);
  90         host1x_syncpt_free(client->syncpts[0]);
  91         host1x_channel_put(gr2d->channel);
  92
  93         return 0;
  94 }
  95
  96 static const struct host1x_client_ops gr2d_client_ops = {
  97         .init = gr2d_init,
  98         .exit = gr2d_exit,
  99 };
 100
 101 static int gr2d_open_channel(struct tegra_drm_client *client,
 102                              struct tegra_drm_context *context)
 103 {
 104         struct gr2d *gr2d = to_gr2d(client);
 105
 106         context->channel = host1x_channel_get(gr2d->channel);
 107         if (!context->channel)
 108                 return -ENOMEM;
 109
 110         return 0;
 111 }
 112
 113 static void gr2d_close_channel(struct tegra_drm_context *context)
 114 {
 115         host1x_channel_put(context->channel);
 116 }
 117
 118 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
 119 {
 120         struct gr2d *gr2d = dev_get_drvdata(dev);
 121
 122         switch (class) {
 123         case HOST1X_CLASS_HOST1X:
 124                 if (offset == 0x2b)
 125                         return 1;
 126
 127                 break;
 128
 129         case HOST1X_CLASS_GR2D:
 130         case HOST1X_CLASS_GR2D_SB:
 131                 if (offset >= GR2D_NUM_REGS)
 132                         break;
 133
 134                 if (test_bit(offset, gr2d->addr_regs))
 135                         return 1;
 136
 137                 break;
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int gr2d_is_valid_class(u32 class)
 144 {
 145         return (class == HOST1X_CLASS_GR2D ||
 146                 class == HOST1X_CLASS_GR2D_SB);
 147 }
 148
 149 static const struct tegra_drm_client_ops gr2d_ops = {
 150         .open_channel = gr2d_open_channel,
 151         .close_channel = gr2d_close_channel,
 152         .is_addr_reg = gr2d_is_addr_reg,
 153         .is_valid_class = gr2d_is_valid_class,
 154         .submit = tegra_drm_submit,
 155 };
 156
 157 static const struct gr2d_soc tegra20_gr2d_soc = {
 158         .version = 0x20,
 159 };
 160
 161 static const struct gr2d_soc tegra30_gr2d_soc = {
 162         .version = 0x30,
 163 };
 164
 165 static const struct of_device_id gr2d_match[] = {
 166         { .compatible = "nvidia,tegra30-gr2d", .data = &tegra20_gr2d_soc },
 167         { .compatible = "nvidia,tegra20-gr2d", .data = &tegra30_gr2d_soc },
 168         { },
 169 };
 170 MODULE_DEVICE_TABLE(of, gr2d_match);
 171
 172 static const u32 gr2d_addr_regs[] = {
 173         GR2D_UA_BASE_ADDR,
 174         GR2D_VA_BASE_ADDR,
 175         GR2D_PAT_BASE_ADDR,
 176         GR2D_DSTA_BASE_ADDR,
 177         GR2D_DSTB_BASE_ADDR,
 178         GR2D_DSTC_BASE_ADDR,
 179         GR2D_SRCA_BASE_ADDR,
 180         GR2D_SRCB_BASE_ADDR,
 181         GR2D_SRC_BASE_ADDR_SB,
 182         GR2D_DSTA_BASE_ADDR_SB,
 183         GR2D_DSTB_BASE_ADDR_SB,
 184         GR2D_UA_BASE_ADDR_SB,
 185         GR2D_VA_BASE_ADDR_SB,
 186 };
 187
 188 static int gr2d_probe(struct platform_device *pdev)
 189 {
 190         struct device *dev = &pdev->dev;
 191         struct host1x_syncpt **syncpts;
 192         struct gr2d *gr2d;
 193         unsigned int i;
 194         int err;
 195
 196         gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
 197         if (!gr2d)
 198                 return -ENOMEM;
 199
 200         gr2d->soc = of_device_get_match_data(dev);
 201
 202         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
 203         if (!syncpts)
 204                 return -ENOMEM;
 205
 206         gr2d->clk = devm_clk_get(dev, NULL);
 207         if (IS_ERR(gr2d->clk)) {
 208                 dev_err(dev, "cannot get clock\n");
 209                 return PTR_ERR(gr2d->clk);
 210         }
 211
 212         err = clk_prepare_enable(gr2d->clk);
 213         if (err) {
 214                 dev_err(dev, "cannot turn on clock\n");
 215                 return err;
 216         }
 217
 218         INIT_LIST_HEAD(&gr2d->client.base.list);
 219         gr2d->client.base.ops = &gr2d_client_ops;
 220         gr2d->client.base.dev = dev;
 221         gr2d->client.base.class = HOST1X_CLASS_GR2D;
 222         gr2d->client.base.syncpts = syncpts;
 223         gr2d->client.base.num_syncpts = 1;
 224
 225         INIT_LIST_HEAD(&gr2d->client.list);
 226         gr2d->client.version = gr2d->soc->version;
 227         gr2d->client.ops = &gr2d_ops;
 228
 229         err = host1x_client_register(&gr2d->client.base);
 230         if (err < 0) {
 231                 dev_err(dev, "failed to register host1x client: %d\n", err);
 232                 clk_disable_unprepare(gr2d->clk);
 233                 return err;
 234         }
 235
 236         /* initialize address register map */
 237         for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
 238                 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
 239
 240         platform_set_drvdata(pdev, gr2d);
 241
 242         return 0;
 243 }
 244
 245 static int gr2d_remove(struct platform_device *pdev)
 246 {
 247         struct gr2d *gr2d = platform_get_drvdata(pdev);
 248         int err;
 249
 250         err = host1x_client_unregister(&gr2d->client.base);
 251         if (err < 0) {
 252                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 253                         err);
 254                 return err;
 255         }
 256
 257         clk_disable_unprepare(gr2d->clk);
 258
 259         return 0;
 260 }
 261
 262 struct platform_driver tegra_gr2d_driver = {
 263         .driver = {
 264                 .name = "tegra-gr2d",
 265                 .of_match_table = gr2d_match,
 266         },
 267         .probe = gr2d_probe,
 268         .remove = gr2d_remove,
 269 };