Christian König ad4af6dde9 UPSTREAM: dma-buf: make fence sequence numbers 64 bit v2 ...

For a lot of use cases we need 64bit sequence numbers. Currently drivers
overload the dma_fence structure to store the additional bits.

Stop doing that and make the sequence number in the dma_fence always
64bit.

For compatibility with hardware which can do only 32bit sequences the
comparisons in __dma_fence_is_later only takes the lower 32bits as significant
when the upper 32bits are all zero.

v2: change the logic in __dma_fence_is_later

Change-Id: I735ecc9f20b0fb7b6052c4a73cbe2ea94c0935eb
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Link: https://patchwork.freedesktop.org/patch/266927/

2026-05-31 11:15:34 +01:00

..

Makefile

…

vgem_drv.c

…

vgem_drv.h

…

vgem_fence.c

UPSTREAM: dma-buf: make fence sequence numbers 64 bit v2

2026-05-31 11:15:34 +01:00