mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 22:14:20 +08:00
efa04fefeb
This patch adds system heap to the dma-buf heaps framework. This allows applications to get a page-allocator backed dma-buf for non-contiguous memory. This code is an evolution of the Android ION implementation, so thanks to its original authors and maintainters: Rebecca Schultz Zavin, Colin Cross, Laura Abbott, and others! Cc: Laura Abbott <labbott@redhat.com> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Liam Mark <lmark@codeaurora.org> Cc: Pratik Patel <pratikp@codeaurora.org> Cc: Brian Starkey <Brian.Starkey@arm.com> Cc: Vincent Donnefort <Vincent.Donnefort@arm.com> Cc: Sudipto Paul <Sudipto.Paul@arm.com> Cc: Andrew F. Davis <afd@ti.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Chenbo Feng <fengc@google.com> Cc: Alistair Strachan <astrachan@google.com> Cc: Hridya Valsaraju <hridya@google.com> Cc: Sandeep Patil <sspatil@google.com> Cc: Hillf Danton <hdanton@sina.com> Cc: Dave Airlie <airlied@gmail.com> Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Reviewed-by: Brian Starkey <brian.starkey@arm.com> Acked-by: Sandeep Patil <sspatil@android.com> Acked-by: Laura Abbott <labbott@redhat.com> Tested-by: Ayan Kumar Halder <ayan.halder@arm.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20191203172641.66642-4-john.stultz@linaro.org
59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
# 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
|
|
|
|
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.
|
|
|
|
source "drivers/dma-buf/heaps/Kconfig"
|
|
|
|
endmenu
|