# SPDX-License-Identifier: GPL-2.0-only
menu "DMABUF options"

config SYNC_FILE
	bool "Explicit Synchronization Framework"
	default n
	select DMA_SHARED_BUFFER
	---help---
	  The Sync File Framework adds explicit syncronization via
	  userspace. It enables send/receive 'struct dma_fence' objects to/from
	  userspace via Sync File fds for synchronization between drivers via
	  userspace components. It has been ported from Android.

	  The first and main user for this is graphics in which a fence is
	  associated with a buffer. When a job is submitted to the GPU a fence
	  is attached to the buffer and is transferred via userspace, using Sync
	  Files fds, to the DRM driver for example. More details at
	  Documentation/driver-api/sync_file.rst.

config SW_SYNC
	bool "Sync File Validation Framework"
	default n
	depends on SYNC_FILE
	depends on DEBUG_FS
	---help---
	  A sync object driver that uses a 32bit counter to coordinate
	  synchronization.  Useful when there is no hardware primitive backing
	  the synchronization.

	  WARNING: improper use of this can result in deadlocking kernel
	  drivers from userspace. Intended for test and debug only.

config UDMABUF
	bool "userspace dmabuf misc driver"
	default n
	depends on DMA_SHARED_BUFFER
	depends on MEMFD_CREATE || COMPILE_TEST
	help
	  A driver to let userspace turn memfd regions into dma-bufs.
	  Qemu can use this to create host dmabufs for guest framebuffers.

config DMABUF_SELFTESTS
	tristate "Selftests for the dma-buf interfaces"
	default n
	depends on DMA_SHARED_BUFFER

config MTK_ION_DMABUF_DEBUG
	bool "Add MTK ION and DMABUF debug prints"
	default n
	help
	  Add debug prints in dmabuf driver to have more specific info
	  about kernel panic while doing dmabuf actions.
	  Add debug prints in ion driver to show more detail footprints
	  for debugging.

menuconfig DMABUF_HEAPS
	bool "DMA-BUF Userland Memory Heaps"
	select DMA_SHARED_BUFFER
	help
	  Choose this option to enable the DMA-BUF userland memory heaps.
	  This options creates per heap chardevs in /dev/dma_heap/ which
	  allows userspace to allocate dma-bufs that can be shared
	  between drivers.

menuconfig DMABUF_SYSFS_STATS
	bool "DMA-BUF sysfs statistics"
	depends on DMA_SHARED_BUFFER
	help
	   Choose this option to enable DMA-BUF sysfs statistics
	   in location /sys/kernel/dmabuf/buffers.

	   /sys/kernel/dmabuf/buffers/<inode_number> will contain
	   statistics for the DMA-BUF with the unique inode number
	   <inode_number>.

source "drivers/dma-buf/heaps/Kconfig"

endmenu
