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dma-buf: make fence sequence numbers 64 bit v2

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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

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Link: https://patchwork.freedesktop.org/patch/266927/
This commit is contained in:
Christian König
2018-11-14 16:11:06 +01:00
parent fcc4a00294
commit b312d8ca3a
8 changed files with 24 additions and 16 deletions
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2
drivers/dma-buf/sw_sync.c
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@@ -172,7 +172,7 @@ static bool timeline_fence_enable_signaling(struct dma_fence *fence)
static void timeline_fence_value_str(struct dma_fence *fence,
char *str, int size)
{
snprintf(str, size, "%d", fence->seqno);
snprintf(str, size, "%lld", fence->seqno);
}
static void timeline_fence_timeline_value_str(struct dma_fence *fence,