mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 07:55:25 +07:00
baa293e954
There are lots of documents under Documentation/*.txt and a few other orphan documents elsehwere that belong to the driver-API book. Move them to their right place. Reviewed-by: Cornelia Huck <cohuck@redhat.com> # vfio-related parts Acked-by: Logan Gunthorpe <logang@deltatee.com> # switchtec Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
43 lines
1.4 KiB
Plaintext
43 lines
1.4 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.
|
|
|
|
endmenu
|