xref: /openbmc/linux/drivers/dma-buf/Kconfig (revision ba61bb17)
1menu "DMABUF options"
2
3config 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
20config 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
33endmenu
34