^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) # SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) menu "DMABUF options"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) config DMABUF_CACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) bool "DMABUF cache attachment"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) default ARCH_ROCKCHIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) depends on NO_GKI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) This option support to store attachments in a list and destroy them by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) set to a callback list in the dtor of dma-buf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) config DMABUF_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) bool "DMABUF debug option"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) depends on NO_GKI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) select RK_DMABUF_PROCFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) This option support to debug all the dmabuf on db_list, allows to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) a name for dmabuf. If not sure, say N
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) config DMABUF_DEBUG_ADVANCED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) bool "DMABUF debug advanced option"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) depends on DMABUF_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) This option support to debug all the dmabuf on db_list, allows to attach
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) and map a dmabuf who has no attachment. If not sure, say N
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) config SYNC_FILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) bool "Explicit Synchronization Framework"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) select DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) The Sync File Framework adds explicit synchronization via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) userspace. It enables send/receive 'struct dma_fence' objects to/from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) userspace via Sync File fds for synchronization between drivers via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) userspace components. It has been ported from Android.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) The first and main user for this is graphics in which a fence is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) associated with a buffer. When a job is submitted to the GPU a fence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) is attached to the buffer and is transferred via userspace, using Sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Files fds, to the DRM driver for example. More details at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) Documentation/driver-api/sync_file.rst.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) config SW_SYNC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) tristate "Sync File Validation Framework"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) depends on SYNC_FILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) A sync object driver that uses a 32bit counter to coordinate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) synchronization. Useful when there is no hardware primitive backing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) the synchronization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) WARNING: improper use of this can result in deadlocking kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) drivers from userspace. Intended for test and debug only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) config SW_SYNC_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) bool "SW Sync Debug"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) depends on DEBUG_FS && SW_SYNC && NO_GKI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) default SW_SYNC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) To get current fence point and timeline status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) config UDMABUF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) bool "userspace dmabuf misc driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) depends on DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) depends on MEMFD_CREATE || COMPILE_TEST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) A driver to let userspace turn memfd regions into dma-bufs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) Qemu can use this to create host dmabufs for guest framebuffers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) config DMABUF_MOVE_NOTIFY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bool "Move notify between drivers (EXPERIMENTAL)"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) depends on DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) Don't pin buffers if the dynamic DMA-buf interface is available on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) both the exporter as well as the importer. This fixes a security
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) problem where userspace is able to pin unrestricted amounts of memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) through DMA-buf.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) This is marked experimental because we don't yet have a consistent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) execution context and memory management between drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) config DMABUF_SELFTESTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) tristate "Selftests for the dma-buf interfaces"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) depends on DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) menuconfig DMABUF_HEAPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) bool "DMA-BUF Userland Memory Heaps"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) select DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) Choose this option to enable the DMA-BUF userland memory heaps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) This options creates per heap chardevs in /dev/dma_heap/ which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) allows userspace to allocate dma-bufs that can be shared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) between drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) menuconfig DMABUF_SYSFS_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) bool "DMA-BUF sysfs statistics"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) select DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) Choose this option to enable DMA-BUF sysfs statistics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) in location /sys/kernel/dmabuf/buffers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /sys/kernel/dmabuf/buffers/<inode_number> will contain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) statistics for the DMA-BUF with the unique inode number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) <inode_number>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) source "drivers/dma-buf/heaps/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) source "drivers/dma-buf/rk_heaps/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) endmenu
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags