On 5/9/25 17:33, Tvrtko Ursulin wrote:

With the goal of reducing the need for drivers to touch (and dereference) fence->ops, we change the prototype of __dma_fence_is_later() to take fence instead of fence->ops.

Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@igalia.com

Reviewed-by: Christian König christian.koenig@amd.com

---

drivers/dma-buf/dma-fence-chain.c | 2 +- drivers/dma-buf/sw_sync.c | 2 +- drivers/gpu/drm/xe/xe_hw_fence.c | 2 +- drivers/gpu/drm/xe/xe_sched_job.c | 14 ++++++++------ include/linux/dma-fence.h | 9 ++++----- 5 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/dma-buf/dma-fence-chain.c b/drivers/dma-buf/dma-fence-chain.c index 9663ba1bb6ac..90424f23fd73 100644 --- a/drivers/dma-buf/dma-fence-chain.c +++ b/drivers/dma-buf/dma-fence-chain.c @@ -252,7 +252,7 @@ void dma_fence_chain_init(struct dma_fence_chain *chain, chain->prev_seqno = 0; /* Try to reuse the context of the previous chain node. */

• if (prev_chain && __dma_fence_is_later(seqno, prev->seqno, prev->ops)) {

• if (prev_chain && __dma_fence_is_later(prev, seqno, prev->seqno)) { context = prev->context; chain->prev_seqno = prev->seqno; } else {

diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c index 4f27ee93a00c..3c20f1d31cf5 100644 --- a/drivers/dma-buf/sw_sync.c +++ b/drivers/dma-buf/sw_sync.c @@ -170,7 +170,7 @@ static bool timeline_fence_signaled(struct dma_fence *fence) { struct sync_timeline *parent = dma_fence_parent(fence);

• return !__dma_fence_is_later(fence->seqno, parent->value, fence->ops);

• return !__dma_fence_is_later(fence, fence->seqno, parent->value);

} static void timeline_fence_set_deadline(struct dma_fence *fence, ktime_t deadline) diff --git a/drivers/gpu/drm/xe/xe_hw_fence.c b/drivers/gpu/drm/xe/xe_hw_fence.c index 0b4f12be3692..03eb8c6d1616 100644 --- a/drivers/gpu/drm/xe/xe_hw_fence.c +++ b/drivers/gpu/drm/xe/xe_hw_fence.c @@ -165,7 +165,7 @@ static bool xe_hw_fence_signaled(struct dma_fence *dma_fence) u32 seqno = xe_map_rd(xe, &fence->seqno_map, 0, u32); return dma_fence->error ||

• !__dma_fence_is_later(dma_fence->seqno, seqno, dma_fence->ops);
  

• !__dma_fence_is_later(dma_fence, dma_fence->seqno, seqno);
  

} static bool xe_hw_fence_enable_signaling(struct dma_fence *dma_fence) diff --git a/drivers/gpu/drm/xe/xe_sched_job.c b/drivers/gpu/drm/xe/xe_sched_job.c index 1905ca590965..f0a6ce610948 100644 --- a/drivers/gpu/drm/xe/xe_sched_job.c +++ b/drivers/gpu/drm/xe/xe_sched_job.c @@ -216,15 +216,17 @@ void xe_sched_job_set_error(struct xe_sched_job *job, int error) bool xe_sched_job_started(struct xe_sched_job *job) {

• struct dma_fence *fence = dma_fence_chain_contained(job->fence); struct xe_lrc *lrc = job->q->lrc[0];

• return !__dma_fence_is_later(xe_sched_job_lrc_seqno(job),

• 		     xe_lrc_start_seqno(lrc),
  

• 		     dma_fence_chain_contained(job->fence)->ops);
  

• return !__dma_fence_is_later(fence,

• 		     xe_sched_job_lrc_seqno(job),
  

• 		     xe_lrc_start_seqno(lrc));
  

} bool xe_sched_job_completed(struct xe_sched_job *job) {

• struct dma_fence *fence = dma_fence_chain_contained(job->fence); struct xe_lrc *lrc = job->q->lrc[0];

/* @@ -232,9 +234,9 @@ bool xe_sched_job_completed(struct xe_sched_job *job) * parallel handshake is done. */

• return !__dma_fence_is_later(xe_sched_job_lrc_seqno(job),

• 		     xe_lrc_seqno(lrc),
  

• 		     dma_fence_chain_contained(job->fence)->ops);
  

• return !__dma_fence_is_later(fence,

• 		     xe_sched_job_lrc_seqno(job),
  

• 		     xe_lrc_seqno(lrc));
  

} void xe_sched_job_arm(struct xe_sched_job *job) diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h index b12776883d14..48b5202c531d 100644 --- a/include/linux/dma-fence.h +++ b/include/linux/dma-fence.h @@ -441,21 +441,20 @@ dma_fence_is_signaled(struct dma_fence *fence) /**

• __dma_fence_is_later - return if f1 is chronologically later than f2

• • @fence: fence in whose context to do the comparison
  • @f1: the first fence's seqno
  • @f2: the second fence's seqno from the same context

• • @ops: dma_fence_ops associated with the seqno
  • Returns true if f1 is chronologically later than f2. Both fences must be
  • from the same context, since a seqno is not common across contexts.
  */

-static inline bool __dma_fence_is_later(u64 f1, u64 f2,

• 			const struct dma_fence_ops *ops)
  

+static inline bool __dma_fence_is_later(struct dma_fence *fence, u64 f1, u64 f2) { /* This is for backward compatibility with drivers which can only handle * 32bit sequence numbers. Use a 64bit compare when the driver says to * do so. */

• if (ops->use_64bit_seqno)

• if (fence->ops->use_64bit_seqno) return f1 > f2;

return (int)(lower_32_bits(f1) - lower_32_bits(f2)) > 0; @@ -475,7 +474,7 @@ static inline bool dma_fence_is_later(struct dma_fence *f1, if (WARN_ON(f1->context != f2->context)) return false;

• return __dma_fence_is_later(f1->seqno, f2->seqno, f1->ops);

• return __dma_fence_is_later(f1, f1->seqno, f2->seqno);

} /**