dri.c

   1 /*
   2  * Copyright 2017 Advanced Micro Devices. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 #ifdef DRV_AMDGPU
   8
   9 #include <assert.h>
  10 #include <dlfcn.h>
  11 #include <errno.h>
  12 #include <fcntl.h>
  13 #include <stdbool.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <sys/mman.h>
  17 #include <unistd.h>
  18 #include <xf86drm.h>
  19
  20 #include "dri.h"
  21 #include "drv_priv.h"
  22 #include "helpers.h"
  23 #include "util.h"
  24
  25 static const struct {
  26         uint32_t drm_format;
  27         int dri_image_format;
  28 } drm_to_dri_image_formats[] = {
  29         { DRM_FORMAT_R8, __DRI_IMAGE_FORMAT_R8 },
  30         { DRM_FORMAT_GR88, __DRI_IMAGE_FORMAT_GR88 },
  31         { DRM_FORMAT_RGB565, __DRI_IMAGE_FORMAT_RGB565 },
  32         { DRM_FORMAT_XRGB8888, __DRI_IMAGE_FORMAT_XRGB8888 },
  33         { DRM_FORMAT_ARGB8888, __DRI_IMAGE_FORMAT_ARGB8888 },
  34         { DRM_FORMAT_XBGR8888, __DRI_IMAGE_FORMAT_XBGR8888 },
  35         { DRM_FORMAT_ABGR8888, __DRI_IMAGE_FORMAT_ABGR8888 },
  36         { DRM_FORMAT_XRGB2101010, __DRI_IMAGE_FORMAT_XRGB2101010 },
  37         { DRM_FORMAT_XBGR2101010, __DRI_IMAGE_FORMAT_XBGR2101010 },
  38         { DRM_FORMAT_ARGB2101010, __DRI_IMAGE_FORMAT_ARGB2101010 },
  39         { DRM_FORMAT_ABGR2101010, __DRI_IMAGE_FORMAT_ABGR2101010 },
  40 };
  41
  42 static int drm_format_to_dri_format(uint32_t drm_format)
  43 {
  44         uint32_t i;
  45         for (i = 0; i < ARRAY_SIZE(drm_to_dri_image_formats); i++) {
  46                 if (drm_to_dri_image_formats[i].drm_format == drm_format)
  47                         return drm_to_dri_image_formats[i].dri_image_format;
  48         }
  49
  50         return 0;
  51 }
  52
  53 static bool lookup_extension(const __DRIextension *const *extensions, const char *name,
  54                              int min_version, const __DRIextension **dst)
  55 {
  56         while (*extensions) {
  57                 if ((*extensions)->name && !strcmp((*extensions)->name, name) &&
  58                     (*extensions)->version >= min_version) {
  59                         *dst = *extensions;
  60                         return true;
  61                 }
  62
  63                 extensions++;
  64         }
  65
  66         return false;
  67 }
  68
  69 /*
  70  * Close Gem Handle
  71  */
  72 static void close_gem_handle(uint32_t handle, int fd)
  73 {
  74         struct drm_gem_close gem_close = { 0 };
  75         int ret = 0;
  76
  77         gem_close.handle = handle;
  78         ret = drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
  79         if (ret)
  80                 drv_log("DRM_IOCTL_GEM_CLOSE failed (handle=%x) error %d\n", handle, ret);
  81 }
  82
  83 /*
  84  * The DRI GEM namespace may be different from the minigbm's driver GEM namespace. We have
  85  * to import into minigbm.
  86  */
  87 static int import_into_minigbm(struct dri_driver *dri, struct bo *bo)
  88 {
  89         uint32_t handle;
  90         int ret, modifier_upper, modifier_lower, num_planes, i, j;
  91         off_t dmabuf_sizes[DRV_MAX_PLANES];
  92         __DRIimage *plane_image = NULL;
  93
  94         if (dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_MODIFIER_UPPER,
  95                                              &modifier_upper) &&
  96             dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_MODIFIER_LOWER,
  97                                              &modifier_lower)) {
  98                 bo->meta.format_modifiers[0] =
  99                     ((uint64_t)modifier_upper << 32) | (uint32_t)modifier_lower;
 100         } else {
 101                 bo->meta.format_modifiers[0] = DRM_FORMAT_MOD_INVALID;
 102         }
 103
 104         if (!dri->image_extension->queryImage(bo->priv, __DRI_IMAGE_ATTRIB_NUM_PLANES,
 105                                               &num_planes)) {
 106                 return -errno;
 107         }
 108
 109         bo->meta.num_planes = num_planes;
 110
 111         for (i = 0; i < num_planes; ++i) {
 112                 int prime_fd, stride, offset;
 113                 plane_image = dri->image_extension->fromPlanar(bo->priv, i, NULL);
 114                 __DRIimage *image = plane_image ? plane_image : bo->priv;
 115
 116                 if (i)
 117                         bo->meta.format_modifiers[i] = bo->meta.format_modifiers[0];
 118
 119                 if (!dri->image_extension->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE, &stride) ||
 120                     !dri->image_extension->queryImage(image, __DRI_IMAGE_ATTRIB_OFFSET, &offset)) {
 121                         ret = -errno;
 122                         goto cleanup;
 123                 }
 124
 125                 if (!dri->image_extension->queryImage(image, __DRI_IMAGE_ATTRIB_FD, &prime_fd)) {
 126                         ret = -errno;
 127                         goto cleanup;
 128                 }
 129
 130                 dmabuf_sizes[i] = lseek(prime_fd, 0, SEEK_END);
 131                 if (dmabuf_sizes[i] == (off_t)-1) {
 132                         ret = -errno;
 133                         close(prime_fd);
 134                         goto cleanup;
 135                 }
 136
 137                 lseek(prime_fd, 0, SEEK_SET);
 138
 139                 ret = drmPrimeFDToHandle(bo->drv->fd, prime_fd, &handle);
 140
 141                 close(prime_fd);
 142
 143                 if (ret) {
 144                         drv_log("drmPrimeFDToHandle failed with %s\n", strerror(errno));
 145                         goto cleanup;
 146                 }
 147
 148                 bo->handles[i].u32 = handle;
 149
 150                 bo->meta.strides[i] = stride;
 151                 bo->meta.offsets[i] = offset;
 152
 153                 if (plane_image)
 154                         dri->image_extension->destroyImage(plane_image);
 155         }
 156
 157         for (i = 0; i < num_planes; ++i) {
 158                 off_t next_plane = dmabuf_sizes[i];
 159                 for (j = 0; j < num_planes; ++j) {
 160                         if (bo->meta.offsets[j] < next_plane &&
 161                             bo->meta.offsets[j] > bo->meta.offsets[i] &&
 162                             bo->handles[j].u32 == bo->handles[i].u32)
 163                                 next_plane = bo->meta.offsets[j];
 164                 }
 165
 166                 bo->meta.sizes[i] = next_plane - bo->meta.offsets[i];
 167
 168                 /* This is kind of misleading if different planes use
 169                    different dmabufs. */
 170                 bo->meta.total_size += bo->meta.sizes[i];
 171         }
 172
 173         return 0;
 174
 175 cleanup:
 176         if (plane_image)
 177                 dri->image_extension->destroyImage(plane_image);
 178         while (--i >= 0) {
 179                 for (j = 0; j <= i; ++j)
 180                         if (bo->handles[j].u32 == bo->handles[i].u32)
 181                                 break;
 182
 183                 /* Multiple equivalent handles) */
 184                 if (i == j)
 185                         break;
 186
 187                 /* This kind of goes horribly wrong when we already imported
 188                  * the same handles earlier, as we should really reference
 189                  * count handles. */
 190                 close_gem_handle(bo->handles[i].u32, bo->drv->fd);
 191         }
 192         return ret;
 193 }
 194
 195 /*
 196  * The caller is responsible for setting drv->priv to a structure that derives from dri_driver.
 197  */
 198 int dri_init(struct driver *drv, const char *dri_so_path, const char *driver_suffix)
 199 {
 200         char fname[128];
 201         const __DRIextension **(*get_extensions)();
 202         const __DRIextension *loader_extensions[] = { NULL };
 203
 204         struct dri_driver *dri = drv->priv;
 205
 206         dri->fd = open(drmGetRenderDeviceNameFromFd(drv_get_fd(drv)), O_RDWR);
 207         if (dri->fd < 0)
 208                 return -ENODEV;
 209
 210         dri->driver_handle = dlopen(dri_so_path, RTLD_NOW | RTLD_GLOBAL);
 211         if (!dri->driver_handle)
 212                 goto close_dri_fd;
 213
 214         snprintf(fname, sizeof(fname), __DRI_DRIVER_GET_EXTENSIONS "_%s", driver_suffix);
 215         get_extensions = dlsym(dri->driver_handle, fname);
 216         if (!get_extensions)
 217                 goto free_handle;
 218
 219         dri->extensions = get_extensions();
 220         if (!dri->extensions)
 221                 goto free_handle;
 222
 223         if (!lookup_extension(dri->extensions, __DRI_CORE, 2,
 224                               (const __DRIextension **)&dri->core_extension))
 225                 goto free_handle;
 226
 227         /* Version 4 for createNewScreen2 */
 228         if (!lookup_extension(dri->extensions, __DRI_DRI2, 4,
 229                               (const __DRIextension **)&dri->dri2_extension))
 230                 goto free_handle;
 231
 232         dri->device = dri->dri2_extension->createNewScreen2(0, dri->fd, loader_extensions,
 233                                                             dri->extensions, &dri->configs, NULL);
 234         if (!dri->device)
 235                 goto free_handle;
 236
 237         dri->context =
 238             dri->dri2_extension->createNewContext(dri->device, *dri->configs, NULL, NULL);
 239
 240         if (!dri->context)
 241                 goto free_screen;
 242
 243         if (!lookup_extension(dri->core_extension->getExtensions(dri->device), __DRI_IMAGE, 12,
 244                               (const __DRIextension **)&dri->image_extension))
 245                 goto free_context;
 246
 247         if (!lookup_extension(dri->core_extension->getExtensions(dri->device), __DRI2_FLUSH, 4,
 248                               (const __DRIextension **)&dri->flush_extension))
 249                 goto free_context;
 250
 251         return 0;
 252
 253 free_context:
 254         dri->core_extension->destroyContext(dri->context);
 255 free_screen:
 256         dri->core_extension->destroyScreen(dri->device);
 257 free_handle:
 258         dlclose(dri->driver_handle);
 259         dri->driver_handle = NULL;
 260 close_dri_fd:
 261         close(dri->fd);
 262         return -ENODEV;
 263 }
 264
 265 /*
 266  * The caller is responsible for freeing drv->priv.
 267  */
 268 void dri_close(struct driver *drv)
 269 {
 270         struct dri_driver *dri = drv->priv;
 271
 272         dri->core_extension->destroyContext(dri->context);
 273         dri->core_extension->destroyScreen(dri->device);
 274         dlclose(dri->driver_handle);
 275         dri->driver_handle = NULL;
 276         close(dri->fd);
 277 }
 278
 279 int dri_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 280                   uint64_t use_flags)
 281 {
 282         unsigned int dri_use;
 283         int ret, dri_format;
 284         struct dri_driver *dri = bo->drv->priv;
 285
 286         dri_format = drm_format_to_dri_format(format);
 287
 288         /* Gallium drivers require shared to get the handle and stride. */
 289         dri_use = __DRI_IMAGE_USE_SHARE;
 290         if (use_flags & BO_USE_SCANOUT)
 291                 dri_use |= __DRI_IMAGE_USE_SCANOUT;
 292         if (use_flags & BO_USE_CURSOR)
 293                 dri_use |= __DRI_IMAGE_USE_CURSOR;
 294         if (use_flags & BO_USE_LINEAR)
 295                 dri_use |= __DRI_IMAGE_USE_LINEAR;
 296
 297         bo->priv = dri->image_extension->createImage(dri->device, width, height, dri_format,
 298                                                      dri_use, NULL);
 299         if (!bo->priv) {
 300                 ret = -errno;
 301                 return ret;
 302         }
 303
 304         ret = import_into_minigbm(dri, bo);
 305         if (ret)
 306                 goto free_image;
 307
 308         return 0;
 309
 310 free_image:
 311         dri->image_extension->destroyImage(bo->priv);
 312         return ret;
 313 }
 314
 315 int dri_bo_create_with_modifiers(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 316                                  const uint64_t *modifiers, uint32_t modifier_count)
 317 {
 318         int ret, dri_format;
 319         struct dri_driver *dri = bo->drv->priv;
 320
 321         if (!dri->image_extension->createImageWithModifiers) {
 322                 return -ENOENT;
 323         }
 324
 325         dri_format = drm_format_to_dri_format(format);
 326
 327         bo->priv = dri->image_extension->createImageWithModifiers(
 328             dri->device, width, height, dri_format, modifiers, modifier_count, NULL);
 329         if (!bo->priv) {
 330                 ret = -errno;
 331                 return ret;
 332         }
 333
 334         ret = import_into_minigbm(dri, bo);
 335         if (ret)
 336                 goto free_image;
 337
 338         return 0;
 339
 340 free_image:
 341         dri->image_extension->destroyImage(bo->priv);
 342         return ret;
 343 }
 344
 345 int dri_bo_import(struct bo *bo, struct drv_import_fd_data *data)
 346 {
 347         int ret;
 348         struct dri_driver *dri = bo->drv->priv;
 349
 350         if (data->format_modifiers[0] != DRM_FORMAT_MOD_INVALID) {
 351                 unsigned error;
 352
 353                 if (!dri->image_extension->createImageFromDmaBufs2)
 354                         return -ENOSYS;
 355
 356                 // clang-format off
 357                 bo->priv = dri->image_extension->createImageFromDmaBufs2(dri->device, data->width, data->height,
 358                                                                          data->format,
 359                                                                          data->format_modifiers[0],
 360                                                                          data->fds,
 361                                                                          bo->meta.num_planes,
 362                                                                          (int *)data->strides,
 363                                                                          (int *)data->offsets,
 364                                                                          __DRI_YUV_COLOR_SPACE_UNDEFINED,
 365                                                                          __DRI_YUV_RANGE_UNDEFINED,
 366                                                                          __DRI_YUV_CHROMA_SITING_UNDEFINED,
 367                                                                          __DRI_YUV_CHROMA_SITING_UNDEFINED,
 368                                                                          &error, NULL);
 369                 // clang-format on
 370
 371                 /* Could translate the DRI error, but the Mesa GBM also returns ENOSYS. */
 372                 if (!bo->priv)
 373                         return -ENOSYS;
 374         } else {
 375                 // clang-format off
 376                 bo->priv = dri->image_extension->createImageFromFds(dri->device, data->width, data->height,
 377                                                                     data->format, data->fds,
 378                                                                     bo->meta.num_planes,
 379                                                                     (int *)data->strides,
 380                                                                     (int *)data->offsets, NULL);
 381                 // clang-format on
 382                 if (!bo->priv)
 383                         return -errno;
 384         }
 385
 386         ret = import_into_minigbm(dri, bo);
 387         if (ret) {
 388                 dri->image_extension->destroyImage(bo->priv);
 389                 return ret;
 390         }
 391
 392         return 0;
 393 }
 394
 395 int dri_bo_destroy(struct bo *bo)
 396 {
 397         struct dri_driver *dri = bo->drv->priv;
 398
 399         assert(bo->priv);
 400         close_gem_handle(bo->handles[0].u32, bo->drv->fd);
 401         dri->image_extension->destroyImage(bo->priv);
 402         bo->priv = NULL;
 403         return 0;
 404 }
 405
 406 /*
 407  * Map an image plane.
 408  *
 409  * This relies on the underlying driver to do a decompressing and/or de-tiling
 410  * blit if necessary,
 411  *
 412  * This function itself is not thread-safe; we rely on the fact that the caller
 413  * locks a per-driver mutex.
 414  */
 415 void *dri_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags)
 416 {
 417         struct dri_driver *dri = bo->drv->priv;
 418
 419         /* GBM flags and DRI flags are the same. */
 420         vma->addr = dri->image_extension->mapImage(dri->context, bo->priv, 0, 0, bo->meta.width,
 421                                                    bo->meta.height, map_flags,
 422                                                    (int *)&vma->map_strides[plane], &vma->priv);
 423         if (!vma->addr)
 424                 return MAP_FAILED;
 425
 426         return vma->addr;
 427 }
 428
 429 int dri_bo_unmap(struct bo *bo, struct vma *vma)
 430 {
 431         struct dri_driver *dri = bo->drv->priv;
 432
 433         assert(vma->priv);
 434         dri->image_extension->unmapImage(dri->context, bo->priv, vma->priv);
 435
 436         /*
 437          * From gbm_dri.c in Mesa:
 438          *
 439          * "Not all DRI drivers use direct maps. They may queue up DMA operations
 440          *  on the mapping context. Since there is no explicit gbm flush mechanism,
 441          *  we need to flush here."
 442          */
 443
 444         dri->flush_extension->flush_with_flags(dri->context, NULL, __DRI2_FLUSH_CONTEXT, 0);
 445         return 0;
 446 }
 447
 448 size_t dri_num_planes_from_modifier(struct driver *drv, uint32_t format, uint64_t modifier)
 449 {
 450         struct dri_driver *dri = drv->priv;
 451         if (!dri->image_extension->queryDmaBufFormatModifierAttribs) {
 452                 /* We do not do any modifier checks here. The create will fail
 453                  * later if the modifier is not supported. */
 454                 return drv_num_planes_from_format(format);
 455         }
 456
 457         uint64_t planes;
 458         GLboolean ret = dri->image_extension->queryDmaBufFormatModifierAttribs(
 459             dri->device, format, modifier, __DRI_IMAGE_ATTRIB_NUM_PLANES, &planes);
 460         if (!ret)
 461                 return 0;
 462
 463         return planes;
 464 }
 465
 466 #endif