struct fence *drm_sw_fence_new(unsigned int context, unsigned seqno)
{
struct fence *fence;
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (!fence)
return ERR_PTR(-ENOMEM);
fence_init(fence,
&sw_fence_ops,
&sw_fence_lock,
context, seqno);
return fence;
}
/**
* radeon_fence_emit - emit a fence on the requested ring
*
* @rdev: radeon_device pointer
* @fence: radeon fence object
* @ring: ring index the fence is associated with
*
* Emits a fence command on the requested ring (all asics).
* Returns 0 on success, -ENOMEM on failure.
*/
int radeon_fence_emit(struct radeon_device *rdev,
struct radeon_fence **fence,
int ring)
{
u64 seq = ++rdev->fence_drv[ring].sync_seq[ring];
/* we are protected by the ring emission mutex */
*fence = kmalloc(sizeof(struct radeon_fence), GFP_KERNEL);
if ((*fence) == NULL) {
return -ENOMEM;
}
(*fence)->rdev = rdev;
(*fence)->seq = seq;
(*fence)->ring = ring;
(*fence)->is_vm_update = false;
fence_init(&(*fence)->base, &radeon_fence_ops,
&rdev->fence_queue.lock, rdev->fence_context + ring, seq);
radeon_fence_ring_emit(rdev, ring, *fence);
trace_radeon_fence_emit(rdev->ddev, ring, (*fence)->seq);
return 0;
}
/**
* amdgpu_fence_emit - emit a fence on the requested ring
*
* @ring: ring the fence is associated with
* @f: resulting fence object
*
* Emits a fence command on the requested ring (all asics).
* Returns 0 on success, -ENOMEM on failure.
*/
int amdgpu_fence_emit(struct amdgpu_ring *ring, struct fence **f)
{
struct amdgpu_device *adev = ring->adev;
struct amdgpu_fence *fence;
struct fence *old, **ptr;
uint32_t seq;
fence = kmem_cache_alloc(amdgpu_fence_slab, GFP_KERNEL);
if (fence == NULL)
return -ENOMEM;
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,
seq);
amdgpu_ring_emit_fence(ring, ring->fence_drv.gpu_addr,
seq, AMDGPU_FENCE_FLAG_INT);
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.
*/
old = rcu_dereference_protected(*ptr, 1);
if (old && !fence_is_signaled(old)) {
DRM_INFO("rcu slot is busy\n");
fence_wait(old, false);
}
rcu_assign_pointer(*ptr, fence_get(&fence->base));
*f = &fence->base;
return 0;
}
