drivers/gpu/host1x/drm/gr2d.c

   1 /*
   2  * Copyright (c) 2012-2013, NVIDIA Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <linux/clk.h>
  18
  19 #include "channel.h"
  20 #include "drm.h"
  21 #include "gem.h"
  22 #include "job.h"
  23 #include "host1x_bo.h"
  24 #include "host1x_client.h"
  25 #include "syncpt.h"
  26
  27 #define GR2D_NUM_REGS 0x4d
  28
  29 struct gr2d {
  30         struct tegra_drm_client client;
  31         struct host1x_channel *channel;
  32         struct clk *clk;
  33
  34         DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
  35 };
  36
  37 static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
  38 {
  39         return container_of(client, struct gr2d, client);
  40 }
  41
  42 static int gr2d_client_init(struct host1x_client *client)
  43 {
  44         return 0;
  45 }
  46
  47 static int gr2d_client_exit(struct host1x_client *client)
  48 {
  49         return 0;
  50 }
  51
  52 static const struct host1x_client_ops gr2d_client_ops = {
  53         .init = gr2d_client_init,
  54         .exit = gr2d_client_exit,
  55 };
  56
  57 static int gr2d_open_channel(struct tegra_drm_client *client,
  58                              struct tegra_drm_context *context)
  59 {
  60         struct gr2d *gr2d = to_gr2d(client);
  61
  62         context->channel = host1x_channel_get(gr2d->channel);
  63         if (!context->channel)
  64                 return -ENOMEM;
  65
  66         return 0;
  67 }
  68
  69 static void gr2d_close_channel(struct tegra_drm_context *context)
  70 {
  71         host1x_channel_put(context->channel);
  72 }
  73
  74 static struct host1x_bo *host1x_bo_lookup(struct drm_device *drm,
  75                                           struct drm_file *file,
  76                                           u32 handle)
  77 {
  78         struct drm_gem_object *gem;
  79         struct tegra_bo *bo;
  80
  81         gem = drm_gem_object_lookup(drm, file, handle);
  82         if (!gem)
  83                 return NULL;
  84
  85         mutex_lock(&drm->struct_mutex);
  86         drm_gem_object_unreference(gem);
  87         mutex_unlock(&drm->struct_mutex);
  88
  89         bo = to_tegra_bo(gem);
  90         return &bo->base;
  91 }
  92
  93 static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
  94 {
  95         struct gr2d *gr2d = dev_get_drvdata(dev);
  96
  97         switch (class) {
  98         case HOST1X_CLASS_HOST1X:
  99                 if (offset == 0x2b)
 100                         return 1;
 101
 102                 break;
 103
 104         case HOST1X_CLASS_GR2D:
 105         case HOST1X_CLASS_GR2D_SB:
 106                 if (offset >= GR2D_NUM_REGS)
 107                         break;
 108
 109                 if (test_bit(offset, gr2d->addr_regs))
 110                         return 1;
 111
 112                 break;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int gr2d_submit(struct tegra_drm_context *context,
 119                        struct drm_tegra_submit *args, struct drm_device *drm,
 120                        struct drm_file *file)
 121 {
 122         unsigned int num_cmdbufs = args->num_cmdbufs;
 123         unsigned int num_relocs = args->num_relocs;
 124         unsigned int num_waitchks = args->num_waitchks;
 125         struct drm_tegra_cmdbuf __user *cmdbufs =
 126                 (void * __user)(uintptr_t)args->cmdbufs;
 127         struct drm_tegra_reloc __user *relocs =
 128                 (void * __user)(uintptr_t)args->relocs;
 129         struct drm_tegra_waitchk __user *waitchks =
 130                 (void * __user)(uintptr_t)args->waitchks;
 131         struct drm_tegra_syncpt syncpt;
 132         struct host1x_job *job;
 133         int err;
 134
 135         /* We don't yet support other than one syncpt_incr struct per submit */
 136         if (args->num_syncpts != 1)
 137                 return -EINVAL;
 138
 139         job = host1x_job_alloc(context->channel, args->num_cmdbufs,
 140                                args->num_relocs, args->num_waitchks);
 141         if (!job)
 142                 return -ENOMEM;
 143
 144         job->num_relocs = args->num_relocs;
 145         job->num_waitchk = args->num_waitchks;
 146         job->client = (u32)args->context;
 147         job->class = context->client->base.class;
 148         job->serialize = true;
 149
 150         while (num_cmdbufs) {
 151                 struct drm_tegra_cmdbuf cmdbuf;
 152                 struct host1x_bo *bo;
 153
 154                 err = copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf));
 155                 if (err)
 156                         goto fail;
 157
 158                 bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
 159                 if (!bo) {
 160                         err = -ENOENT;
 161                         goto fail;
 162                 }
 163
 164                 host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
 165                 num_cmdbufs--;
 166                 cmdbufs++;
 167         }
 168
 169         err = copy_from_user(job->relocarray, relocs,
 170                              sizeof(*relocs) * num_relocs);
 171         if (err)
 172                 goto fail;
 173
 174         while (num_relocs--) {
 175                 struct host1x_reloc *reloc = &job->relocarray[num_relocs];
 176                 struct host1x_bo *cmdbuf, *target;
 177
 178                 cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
 179                 target = host1x_bo_lookup(drm, file, (u32)reloc->target);
 180
 181                 reloc->cmdbuf = cmdbuf;
 182                 reloc->target = target;
 183
 184                 if (!reloc->target || !reloc->cmdbuf) {
 185                         err = -ENOENT;
 186                         goto fail;
 187                 }
 188         }
 189
 190         err = copy_from_user(job->waitchk, waitchks,
 191                              sizeof(*waitchks) * num_waitchks);
 192         if (err)
 193                 goto fail;
 194
 195         err = copy_from_user(&syncpt, (void * __user)(uintptr_t)args->syncpts,
 196                              sizeof(syncpt));
 197         if (err)
 198                 goto fail;
 199
 200         job->syncpt_id = syncpt.id;
 201         job->syncpt_incrs = syncpt.incrs;
 202         job->timeout = 10000;
 203         job->is_addr_reg = gr2d_is_addr_reg;
 204
 205         if (args->timeout && args->timeout < 10000)
 206                 job->timeout = args->timeout;
 207
 208         err = host1x_job_pin(job, context->client->base.dev);
 209         if (err)
 210                 goto fail;
 211
 212         err = host1x_job_submit(job);
 213         if (err)
 214                 goto fail_submit;
 215
 216         args->fence = job->syncpt_end;
 217
 218         host1x_job_put(job);
 219         return 0;
 220
 221 fail_submit:
 222         host1x_job_unpin(job);
 223 fail:
 224         host1x_job_put(job);
 225         return err;
 226 }
 227
 228 static const struct tegra_drm_client_ops gr2d_ops = {
 229         .open_channel = gr2d_open_channel,
 230         .close_channel = gr2d_close_channel,
 231         .submit = gr2d_submit,
 232 };
 233
 234 static const struct of_device_id gr2d_match[] = {
 235         { .compatible = "nvidia,tegra30-gr2d" },
 236         { .compatible = "nvidia,tegra20-gr2d" },
 237         { },
 238 };
 239
 240 static const u32 gr2d_addr_regs[] = {
 241         0x1a, 0x1b, 0x26, 0x2b, 0x2c, 0x2d, 0x31, 0x32,
 242         0x48, 0x49, 0x4a, 0x4b, 0x4c
 243 };
 244
 245 static int gr2d_probe(struct platform_device *pdev)
 246 {
 247         struct tegra_drm *tegra = host1x_get_drm_data(pdev->dev.parent);
 248         struct device *dev = &pdev->dev;
 249         struct host1x_syncpt **syncpts;
 250         struct gr2d *gr2d;
 251         unsigned int i;
 252         int err;
 253
 254         gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
 255         if (!gr2d)
 256                 return -ENOMEM;
 257
 258         syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
 259         if (!syncpts)
 260                 return -ENOMEM;
 261
 262         gr2d->clk = devm_clk_get(dev, NULL);
 263         if (IS_ERR(gr2d->clk)) {
 264                 dev_err(dev, "cannot get clock\n");
 265                 return PTR_ERR(gr2d->clk);
 266         }
 267
 268         err = clk_prepare_enable(gr2d->clk);
 269         if (err) {
 270                 dev_err(dev, "cannot turn on clock\n");
 271                 return err;
 272         }
 273
 274         gr2d->channel = host1x_channel_request(dev);
 275         if (!gr2d->channel)
 276                 return -ENOMEM;
 277
 278         *syncpts = host1x_syncpt_request(dev, false);
 279         if (!(*syncpts)) {
 280                 host1x_channel_free(gr2d->channel);
 281                 return -ENOMEM;
 282         }
 283
 284         INIT_LIST_HEAD(&gr2d->client.base.list);
 285         gr2d->client.base.ops = &gr2d_client_ops;
 286         gr2d->client.base.dev = dev;
 287         gr2d->client.base.class = HOST1X_CLASS_GR2D;
 288         gr2d->client.base.syncpts = syncpts;
 289         gr2d->client.base.num_syncpts = 1;
 290         gr2d->client.ops = &gr2d_ops;
 291
 292         err = host1x_register_client(tegra, &gr2d->client.base);
 293         if (err < 0) {
 294                 dev_err(dev, "failed to register host1x client: %d\n", err);
 295                 return err;
 296         }
 297
 298         /* initialize address register map */
 299         for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
 300                 set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
 301
 302         platform_set_drvdata(pdev, gr2d);
 303
 304         return 0;
 305 }
 306
 307 static int gr2d_remove(struct platform_device *pdev)
 308 {
 309         struct tegra_drm *tegra = host1x_get_drm_data(pdev->dev.parent);
 310         struct gr2d *gr2d = platform_get_drvdata(pdev);
 311         unsigned int i;
 312         int err;
 313
 314         err = host1x_unregister_client(tegra, &gr2d->client.base);
 315         if (err < 0) {
 316                 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
 317                         err);
 318                 return err;
 319         }
 320
 321         for (i = 0; i < gr2d->client.base.num_syncpts; i++)
 322                 host1x_syncpt_free(gr2d->client.base.syncpts[i]);
 323
 324         host1x_channel_free(gr2d->channel);
 325         clk_disable_unprepare(gr2d->clk);
 326
 327         return 0;
 328 }
 329
 330 struct platform_driver tegra_gr2d_driver = {
 331         .driver = {
 332                 .name = "tegra-gr2d",
 333                 .of_match_table = gr2d_match,
 334         },
 335         .probe = gr2d_probe,
 336         .remove = gr2d_remove,
 337 };