kernel/drivers/gpu/drm/nouveau/include/nvif/unpack.h

   1 #ifndef __NVIF_UNPACK_H__
   2 #define __NVIF_UNPACK_H__
   3
   4 #define nvif_unvers(d) ({                                                      \
   5         ret = (size == sizeof(d)) ? 0 : -ENOSYS;                               \
   6         (ret == 0);                                                            \
   7 })
   8
   9 #define nvif_unpack(d,vl,vh,m) ({                                              \
  10         if ((vl) == 0 || ret == -ENOSYS) {                                     \
  11                 int _size = sizeof(d);                                         \
  12                 if (_size <= size && (d).version >= (vl) &&                    \
  13                                      (d).version <= (vh)) {                    \
  14                         data = (u8 *)data + _size;                             \
  15                         size = size - _size;                                   \
  16                         ret = ((m) || !size) ? 0 : -E2BIG;                     \
  17                 } else {                                                       \
  18                         ret = -ENOSYS;                                         \
  19                 }                                                              \
  20         }                                                                      \
  21         (ret == 0);                                                            \
  22 })
  23
  24 #endif