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