diff options
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 49 |
2 files changed, 21 insertions, 32 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index c91156c7bda1..31fd7ee62e69 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -386,8 +386,8 @@ struct amdgpu_fence_driver { uint64_t gpu_addr; volatile uint32_t *cpu_addr; /* sync_seq is protected by ring emission lock */ - uint64_t sync_seq; - atomic64_t last_seq; + uint32_t sync_seq; + atomic_t last_seq; bool initialized; struct amdgpu_irq_src *irq_src; unsigned irq_type; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index da9a155a622c..4303b447efe8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -52,7 +52,6 @@ struct amdgpu_fence { /* RB, DMA, etc. */ struct amdgpu_ring *ring; - uint64_t seq; }; static struct kmem_cache *amdgpu_fence_slab; @@ -104,7 +103,7 @@ static u32 amdgpu_fence_read(struct amdgpu_ring *ring) if (drv->cpu_addr) seq = le32_to_cpu(*drv->cpu_addr); else - seq = lower_32_bits(atomic64_read(&drv->last_seq)); + seq = atomic_read(&drv->last_seq); return seq; } @@ -123,23 +122,22 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, struct fence **f) struct amdgpu_device *adev = ring->adev; struct amdgpu_fence *fence; struct fence **ptr; - unsigned idx; + uint32_t seq; fence = kmem_cache_alloc(amdgpu_fence_slab, GFP_KERNEL); if (fence == NULL) return -ENOMEM; - fence->seq = ++ring->fence_drv.sync_seq; + seq = ++ring->fence_drv.sync_seq; fence->ring = ring; fence_init(&fence->base, &amdgpu_fence_ops, &ring->fence_drv.lock, adev->fence_context + ring->idx, - fence->seq); + seq); amdgpu_ring_emit_fence(ring, ring->fence_drv.gpu_addr, - fence->seq, AMDGPU_FENCE_FLAG_INT); + seq, AMDGPU_FENCE_FLAG_INT); - idx = fence->seq & ring->fence_drv.num_fences_mask; - ptr = &ring->fence_drv.fences[idx]; + ptr = &ring->fence_drv.fences[seq & ring->fence_drv.num_fences_mask]; /* This function can't be called concurrently anyway, otherwise * emitting the fence would mess up the hardware ring buffer. */ @@ -177,22 +175,16 @@ static void amdgpu_fence_schedule_fallback(struct amdgpu_ring *ring) void amdgpu_fence_process(struct amdgpu_ring *ring) { struct amdgpu_fence_driver *drv = &ring->fence_drv; - uint64_t seq, last_seq, last_emitted; + uint32_t seq, last_seq; int r; do { - last_seq = atomic64_read(&ring->fence_drv.last_seq); - last_emitted = ring->fence_drv.sync_seq; + last_seq = atomic_read(&ring->fence_drv.last_seq); seq = amdgpu_fence_read(ring); - seq |= last_seq & 0xffffffff00000000LL; - if (seq < last_seq) { - seq &= 0xffffffff; - seq |= last_emitted & 0xffffffff00000000LL; - } - } while (atomic64_cmpxchg(&drv->last_seq, last_seq, seq) != last_seq); + } while (atomic_cmpxchg(&drv->last_seq, last_seq, seq) != last_seq); - if (seq < last_emitted) + if (seq != ring->fence_drv.sync_seq) amdgpu_fence_schedule_fallback(ring); while (last_seq != seq) { @@ -279,13 +271,10 @@ unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring) * but it's ok to report slightly wrong fence count here. */ amdgpu_fence_process(ring); - emitted = ring->fence_drv.sync_seq - - atomic64_read(&ring->fence_drv.last_seq); - /* to avoid 32bits warp around */ - if (emitted > 0x10000000) - emitted = 0x10000000; - - return (unsigned)emitted; + emitted = 0x100000000ull; + emitted -= atomic_read(&ring->fence_drv.last_seq); + emitted += ACCESS_ONCE(ring->fence_drv.sync_seq); + return lower_32_bits(emitted); } /** @@ -317,7 +306,7 @@ int amdgpu_fence_driver_start_ring(struct amdgpu_ring *ring, ring->fence_drv.cpu_addr = adev->uvd.cpu_addr + index; ring->fence_drv.gpu_addr = adev->uvd.gpu_addr + index; } - amdgpu_fence_write(ring, atomic64_read(&ring->fence_drv.last_seq)); + amdgpu_fence_write(ring, atomic_read(&ring->fence_drv.last_seq)); amdgpu_irq_get(adev, irq_src, irq_type); ring->fence_drv.irq_src = irq_src; @@ -353,7 +342,7 @@ int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring, ring->fence_drv.cpu_addr = NULL; ring->fence_drv.gpu_addr = 0; ring->fence_drv.sync_seq = 0; - atomic64_set(&ring->fence_drv.last_seq, 0); + atomic_set(&ring->fence_drv.last_seq, 0); ring->fence_drv.initialized = false; setup_timer(&ring->fence_drv.fallback_timer, amdgpu_fence_fallback, @@ -621,9 +610,9 @@ static int amdgpu_debugfs_fence_info(struct seq_file *m, void *data) amdgpu_fence_process(ring); seq_printf(m, "--- ring %d (%s) ---\n", i, ring->name); - seq_printf(m, "Last signaled fence 0x%016llx\n", - (unsigned long long)atomic64_read(&ring->fence_drv.last_seq)); - seq_printf(m, "Last emitted 0x%016llx\n", + seq_printf(m, "Last signaled fence 0x%08x\n", + atomic_read(&ring->fence_drv.last_seq)); + seq_printf(m, "Last emitted 0x%08x\n", ring->fence_drv.sync_seq); } return 0; |