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dma-buf/sw_sync: de-stage SW_SYNC

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SW_SYNC allows to run tests on the sync_file framework via debugfs on

<debugfs>/sync/sw_sync

Opening and closing the file triggers creation and release of a sync
timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE
ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC.

Also it exports Sync information on

<debugfs>/sync/info

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo Padovan 2016-08-11 12:26:44 -03:00 committed by Greg Kroah-Hartman
parent fc0c9a03b5
commit 35538d7822
8 changed files with 15 additions and 15 deletions
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13
drivers/dma-buf/Kconfig
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@ -17,4 +17,17 @@ config SYNC_FILE
Files fds, to the DRM driver for example. More details at
Documentation/sync_file.txt.
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.
endmenu

1
drivers/dma-buf/Makefile
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@ -1,2 +1,3 @@
obj-y := dma-buf.o fence.o reservation.o seqno-fence.o fence-array.o
obj-$(CONFIG_SYNC_FILE) += sync_file.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o

0
drivers/staging/android/sw_sync.c → drivers/dma-buf/sw_sync.c
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0
drivers/staging/android/sync_debug.c → drivers/dma-buf/sync_debug.c
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0
drivers/staging/android/sync_debug.h → drivers/dma-buf/sync_debug.h
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2
drivers/staging/android/sync_trace.h → drivers/dma-buf/sync_trace.h
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@ -1,5 +1,5 @@
#undef TRACE_SYSTEM
#define TRACE_INCLUDE_PATH ../../drivers/staging/android
#define TRACE_INCLUDE_PATH ../../drivers/dma-buf
#define TRACE_SYSTEM sync_trace
#if !defined(_TRACE_SYNC_H) || defined(TRACE_HEADER_MULTI_READ)

13
drivers/staging/android/Kconfig
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@ -24,19 +24,6 @@ config ANDROID_LOW_MEMORY_KILLER
scripts (/init.rc), and it defines priority values with minimum free memory size
for each priority.
config SW_SYNC
bool "Software synchronization 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.
source "drivers/staging/android/ion/Kconfig"
endif # if ANDROID

1
drivers/staging/android/Makefile
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@ -4,4 +4,3 @@ obj-y += ion/
obj-$(CONFIG_ASHMEM) += ashmem.o
obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o