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drm/amdgpu: switch the GDS only on demand v2

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Switching the GDS space to often seems to be problematic.

This patch together with the following can avoid VM faults on context switch.

v2: extend commit message a bit

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Reviewed-by: Chunming Zhou <david1.zhou@amd.com> (v1)
This commit is contained in:
Christian König
2016-03-01 15:09:25 +01:00
committed by Alex Deucher
parent cffadc83c7
commit 971fe9a941
3 changed files with 53 additions and 2 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+4
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@@ -165,6 +165,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
if (ib->ctx != ctx || ib->vm != vm) {
ring->current_ctx = old_ctx;
if (ib->vm_id)
amdgpu_vm_reset_id(adev, ib->vm_id);
amdgpu_ring_undo(ring);
return -EINVAL;
}
@@ -181,6 +183,8 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
if (r) {
dev_err(adev->dev, "failed to emit fence (%d)\n", r);
ring->current_ctx = old_ctx;
if (ib->vm_id)
amdgpu_vm_reset_id(adev, ib->vm_id);
amdgpu_ring_undo(ring);
return r;
}