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authorChristian König <christian.koenig@amd.com>2018-11-14 18:11:06 +0300
committerChristian König <christian.koenig@amd.com>2018-12-07 14:44:16 +0300
commitb312d8ca3a7cebe19941d969a51f2b7f899b81e2 (patch)
treeb38afe698b8f8c4cfb9a9e8e8ee1808fad4c33e5 /drivers/dma-buf
parentfcc4a00294a585dfee7588410d5cc9768abc7f00 (diff)
downloadlinux-b312d8ca3a7cebe19941d969a51f2b7f899b81e2.tar.xz
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 Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Chunming Zhou <david1.zhou@amd.com> Link: https://patchwork.freedesktop.org/patch/266927/
Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/dma-fence.c2
-rw-r--r--drivers/dma-buf/sw_sync.c2
-rw-r--r--drivers/dma-buf/sync_file.c4
3 files changed, 4 insertions, 4 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 136ec04d683f..3aa8733f832a 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -649,7 +649,7 @@ EXPORT_SYMBOL(dma_fence_wait_any_timeout);
*/
void
dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
- spinlock_t *lock, u64 context, unsigned seqno)
+ spinlock_t *lock, u64 context, u64 seqno)
{
BUG_ON(!lock);
BUG_ON(!ops || !ops->get_driver_name || !ops->get_timeline_name);
diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c
index 53c1d6d36a64..32dcf7b4c935 100644
--- a/drivers/dma-buf/sw_sync.c
+++ b/drivers/dma-buf/sw_sync.c
@@ -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,
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 35dd06479867..4f6305ca52c8 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -144,7 +144,7 @@ char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len)
} else {
struct dma_fence *fence = sync_file->fence;
- snprintf(buf, len, "%s-%s%llu-%d",
+ snprintf(buf, len, "%s-%s%llu-%lld",
fence->ops->get_driver_name(fence),
fence->ops->get_timeline_name(fence),
fence->context,
@@ -258,7 +258,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
i_b++;
} else {
- if (pt_a->seqno - pt_b->seqno <= INT_MAX)
+ if (__dma_fence_is_later(pt_a->seqno, pt_b->seqno))
add_fence(fences, &i, pt_a);
else
add_fence(fences, &i, pt_b);