tegra/tegra.c

   1 /*
   2  * Copyright © 2012, 2013 Thierry Reding
   3  * Copyright © 2013 Erik Faye-Lund
   4  * Copyright © 2014 NVIDIA Corporation
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include <sys/mman.h>
  31
  32 #include <xf86drm.h>
  33
  34 #include <tegra_drm.h>
  35
  36 #include "private.h"
  37
  38 static void drm_tegra_bo_free(struct drm_tegra_bo *bo)
  39 {
  40         struct drm_tegra *drm = bo->drm;
  41         struct drm_gem_close args;
  42
  43         if (bo->map)
  44                 munmap(bo->map, bo->size);
  45
  46         memset(&args, 0, sizeof(args));
  47         args.handle = bo->handle;
  48
  49         drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &args);
  50
  51         free(bo);
  52 }
  53
  54 static int drm_tegra_wrap(struct drm_tegra **drmp, int fd, bool close)
  55 {
  56         struct drm_tegra *drm;
  57
  58         if (fd < 0 || !drmp)
  59                 return -EINVAL;
  60
  61         drm = calloc(1, sizeof(*drm));
  62         if (!drm)
  63                 return -ENOMEM;
  64
  65         drm->close = close;
  66         drm->fd = fd;
  67
  68         *drmp = drm;
  69
  70         return 0;
  71 }
  72
  73 drm_public int drm_tegra_new(struct drm_tegra **drmp, int fd)
  74 {
  75         bool supported = false;
  76         drmVersionPtr version;
  77
  78         version = drmGetVersion(fd);
  79         if (!version)
  80                 return -ENOMEM;
  81
  82         if (!strncmp(version->name, "tegra", version->name_len))
  83                 supported = true;
  84
  85         drmFreeVersion(version);
  86
  87         if (!supported)
  88                 return -ENOTSUP;
  89
  90         return drm_tegra_wrap(drmp, fd, false);
  91 }
  92
  93 drm_public void drm_tegra_close(struct drm_tegra *drm)
  94 {
  95         if (!drm)
  96                 return;
  97
  98         if (drm->close)
  99                 close(drm->fd);
 100
 101         free(drm);
 102 }
 103
 104 drm_public int drm_tegra_bo_new(struct drm_tegra_bo **bop, struct drm_tegra *drm,
 105                      uint32_t flags, uint32_t size)
 106 {
 107         struct drm_tegra_gem_create args;
 108         struct drm_tegra_bo *bo;
 109         int err;
 110
 111         if (!drm || size == 0 || !bop)
 112                 return -EINVAL;
 113
 114         bo = calloc(1, sizeof(*bo));
 115         if (!bo)
 116                 return -ENOMEM;
 117
 118         atomic_set(&bo->ref, 1);
 119         bo->flags = flags;
 120         bo->size = size;
 121         bo->drm = drm;
 122
 123         memset(&args, 0, sizeof(args));
 124         args.flags = flags;
 125         args.size = size;
 126
 127         err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_CREATE, &args,
 128                                   sizeof(args));
 129         if (err < 0) {
 130                 err = -errno;
 131                 free(bo);
 132                 return err;
 133         }
 134
 135         bo->handle = args.handle;
 136
 137         *bop = bo;
 138
 139         return 0;
 140 }
 141
 142 drm_public int drm_tegra_bo_wrap(struct drm_tegra_bo **bop, struct drm_tegra *drm,
 143                       uint32_t handle, uint32_t flags, uint32_t size)
 144 {
 145         struct drm_tegra_bo *bo;
 146
 147         if (!drm || !bop)
 148                 return -EINVAL;
 149
 150         bo = calloc(1, sizeof(*bo));
 151         if (!bo)
 152                 return -ENOMEM;
 153
 154         atomic_set(&bo->ref, 1);
 155         bo->handle = handle;
 156         bo->flags = flags;
 157         bo->size = size;
 158         bo->drm = drm;
 159
 160         *bop = bo;
 161
 162         return 0;
 163 }
 164
 165 drm_public struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo)
 166 {
 167         if (bo)
 168                 atomic_inc(&bo->ref);
 169
 170         return bo;
 171 }
 172
 173 drm_public void drm_tegra_bo_unref(struct drm_tegra_bo *bo)
 174 {
 175         if (bo && atomic_dec_and_test(&bo->ref))
 176                 drm_tegra_bo_free(bo);
 177 }
 178
 179 drm_public int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle)
 180 {
 181         if (!bo || !handle)
 182                 return -EINVAL;
 183
 184         *handle = bo->handle;
 185
 186         return 0;
 187 }
 188
 189 drm_public int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr)
 190 {
 191         struct drm_tegra *drm = bo->drm;
 192
 193         if (!bo->map) {
 194                 struct drm_tegra_gem_mmap args;
 195                 int err;
 196
 197                 memset(&args, 0, sizeof(args));
 198                 args.handle = bo->handle;
 199
 200                 err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_MMAP, &args,
 201                                           sizeof(args));
 202                 if (err < 0)
 203                         return -errno;
 204
 205                 bo->offset = args.offset;
 206
 207                 bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
 208                                drm->fd, bo->offset);
 209                 if (bo->map == MAP_FAILED) {
 210                         bo->map = NULL;
 211                         return -errno;
 212                 }
 213         }
 214
 215         if (ptr)
 216                 *ptr = bo->map;
 217
 218         return 0;
 219 }
 220
 221 drm_public int drm_tegra_bo_unmap(struct drm_tegra_bo *bo)
 222 {
 223         if (!bo)
 224                 return -EINVAL;
 225
 226         if (!bo->map)
 227                 return 0;
 228
 229         if (munmap(bo->map, bo->size))
 230                 return -errno;
 231
 232         bo->map = NULL;
 233
 234         return 0;
 235 }
 236
 237 drm_public int drm_tegra_bo_get_flags(struct drm_tegra_bo *bo, uint32_t *flags)
 238 {
 239         struct drm_tegra_gem_get_flags args;
 240         struct drm_tegra *drm = bo->drm;
 241         int err;
 242
 243         if (!bo)
 244                 return -EINVAL;
 245
 246         memset(&args, 0, sizeof(args));
 247         args.handle = bo->handle;
 248
 249         err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_FLAGS, &args,
 250                                   sizeof(args));
 251         if (err < 0)
 252                 return -errno;
 253
 254         if (flags)
 255                 *flags = args.flags;
 256
 257         return 0;
 258 }
 259
 260 drm_public int drm_tegra_bo_set_flags(struct drm_tegra_bo *bo, uint32_t flags)
 261 {
 262         struct drm_tegra_gem_get_flags args;
 263         struct drm_tegra *drm = bo->drm;
 264         int err;
 265
 266         if (!bo)
 267                 return -EINVAL;
 268
 269         memset(&args, 0, sizeof(args));
 270         args.handle = bo->handle;
 271         args.flags = flags;
 272
 273         err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_FLAGS, &args,
 274                                   sizeof(args));
 275         if (err < 0)
 276                 return -errno;
 277
 278         return 0;
 279 }
 280
 281 drm_public int drm_tegra_bo_get_tiling(struct drm_tegra_bo *bo,
 282                             struct drm_tegra_bo_tiling *tiling)
 283 {
 284         struct drm_tegra_gem_get_tiling args;
 285         struct drm_tegra *drm = bo->drm;
 286         int err;
 287
 288         if (!bo)
 289                 return -EINVAL;
 290
 291         memset(&args, 0, sizeof(args));
 292         args.handle = bo->handle;
 293
 294         err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_GET_TILING, &args,
 295                                   sizeof(args));
 296         if (err < 0)
 297                 return -errno;
 298
 299         if (tiling) {
 300                 tiling->mode = args.mode;
 301                 tiling->value = args.value;
 302         }
 303
 304         return 0;
 305 }
 306
 307 drm_public int drm_tegra_bo_set_tiling(struct drm_tegra_bo *bo,
 308                             const struct drm_tegra_bo_tiling *tiling)
 309 {
 310         struct drm_tegra_gem_set_tiling args;
 311         struct drm_tegra *drm = bo->drm;
 312         int err;
 313
 314         if (!bo)
 315                 return -EINVAL;
 316
 317         memset(&args, 0, sizeof(args));
 318         args.handle = bo->handle;
 319         args.mode = tiling->mode;
 320         args.value = tiling->value;
 321
 322         err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_SET_TILING, &args,
 323                                   sizeof(args));
 324         if (err < 0)
 325                 return -errno;
 326
 327         return 0;
 328 }