diff options
| -rw-r--r-- | include/uapi/drm/xe_drm.h | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h index cac607a30f6d..e2160330ad01 100644 --- a/include/uapi/drm/xe_drm.h +++ b/include/uapi/drm/xe_drm.h @@ -814,29 +814,29 @@ struct drm_xe_gem_create { * * The @flags can be: * - %DRM_XE_MMAP_OFFSET_FLAG_PCI_BARRIER - For user to query special offset - * for use in mmap ioctl. Writing to the returned mmap address will generate a - * PCI memory barrier with low overhead (avoiding IOCTL call as well as writing - * to VRAM which would also add overhead), acting like an MI_MEM_FENCE - * instruction. + * for use in mmap ioctl. Writing to the returned mmap address will generate a + * PCI memory barrier with low overhead (avoiding IOCTL call as well as writing + * to VRAM which would also add overhead), acting like an MI_MEM_FENCE + * instruction. * - * Note: The mmap size can be at most 4K, due to HW limitations. As a result - * this interface is only supported on CPU architectures that support 4K page - * size. The mmap_offset ioctl will detect this and gracefully return an - * error, where userspace is expected to have a different fallback method for - * triggering a barrier. + * Note: The mmap size can be at most 4K, due to HW limitations. As a result + * this interface is only supported on CPU architectures that support 4K page + * size. The mmap_offset ioctl will detect this and gracefully return an + * error, where userspace is expected to have a different fallback method for + * triggering a barrier. * - * Roughly the usage would be as follows: + * Roughly the usage would be as follows: * - * .. code-block:: C + * .. code-block:: C * - * struct drm_xe_gem_mmap_offset mmo = { - * .handle = 0, // must be set to 0 - * .flags = DRM_XE_MMAP_OFFSET_FLAG_PCI_BARRIER, - * }; + * struct drm_xe_gem_mmap_offset mmo = { + * .handle = 0, // must be set to 0 + * .flags = DRM_XE_MMAP_OFFSET_FLAG_PCI_BARRIER, + * }; * - * err = ioctl(fd, DRM_IOCTL_XE_GEM_MMAP_OFFSET, &mmo); - * map = mmap(NULL, size, PROT_WRITE, MAP_SHARED, fd, mmo.offset); - * map[i] = 0xdeadbeaf; // issue barrier + * err = ioctl(fd, DRM_IOCTL_XE_GEM_MMAP_OFFSET, &mmo); + * map = mmap(NULL, size, PROT_WRITE, MAP_SHARED, fd, mmo.offset); + * map[i] = 0xdeadbeaf; // issue barrier */ struct drm_xe_gem_mmap_offset { /** @extensions: Pointer to the first extension struct, if any */ |