drivers/dma-buf/Kconfig

   1 menu "DMABUF options"
   2
   3 config SYNC_FILE
   4         bool "Explicit Synchronization Framework"
   5         default n
   6         select ANON_INODES
   7         select DMA_SHARED_BUFFER
   8         ---help---
   9           The Sync File Framework adds explicit syncronization via
  10           userspace. It enables send/receive 'struct dma_fence' objects to/from
  11           userspace via Sync File fds for synchronization between drivers via
  12           userspace components. It has been ported from Android.
  13
  14           The first and main user for this is graphics in which a fence is
  15           associated with a buffer. When a job is submitted to the GPU a fence
  16           is attached to the buffer and is transferred via userspace, using Sync
  17           Files fds, to the DRM driver for example. More details at
  18           Documentation/sync_file.txt.
  19
  20 config SW_SYNC
  21         bool "Sync File Validation Framework"
  22         default n
  23         depends on SYNC_FILE
  24         depends on DEBUG_FS
  25         ---help---
  26           A sync object driver that uses a 32bit counter to coordinate
  27           synchronization.  Useful when there is no hardware primitive backing
  28           the synchronization.
  29
  30           WARNING: improper use of this can result in deadlocking kernel
  31           drivers from userspace. Intended for test and debug only.
  32
  33 endmenu