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drm/amdgpu: handle wrap around in reemit handling

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Fixes: 77cc0da39c ("drm/amdgpu: track ring state associated with a fence")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2025-09-15 12:37:32 -04:00
parent 357d90be2c
commit 1f22fcb88b
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
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@ -790,14 +790,19 @@ void amdgpu_ring_backup_unprocessed_commands(struct amdgpu_ring *ring,
struct dma_fence *unprocessed;
struct dma_fence __rcu **ptr;
struct amdgpu_fence *fence;
u64 wptr, i, seqno;
u64 wptr;
u32 seq, last_seq;
seqno = amdgpu_fence_read(ring);
last_seq = amdgpu_fence_read(ring) & ring->fence_drv.num_fences_mask;
seq = ring->fence_drv.sync_seq & ring->fence_drv.num_fences_mask;
wptr = ring->fence_drv.signalled_wptr;
ring->ring_backup_entries_to_copy = 0;
for (i = seqno + 1; i <= ring->fence_drv.sync_seq; ++i) {
ptr = &ring->fence_drv.fences[i & ring->fence_drv.num_fences_mask];
do {
last_seq++;
last_seq &= ring->fence_drv.num_fences_mask;
ptr = &ring->fence_drv.fences[last_seq];
rcu_read_lock();
unprocessed = rcu_dereference(*ptr);
@ -813,7 +818,7 @@ void amdgpu_ring_backup_unprocessed_commands(struct amdgpu_ring *ring,
wptr = fence->wptr;
}
rcu_read_unlock();
}
} while (last_seq != seq);
}
/*