drm/amdgpu/gfx10: fix KGQ reset sequence

Need to reinit the ring before remapping it and all of
the KIQ handling needs to be within the kiq lock.

Fixes: 1741281 ("drm/amdgpu/gfx10: add ring reset callbacks")
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: alexdeucher

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -9544,7 +9544,7 @@ static int gfx_v10_0_reset_kgq(struct amdgpu_ring *ring,
 
 	spin_lock_irqsave(&kiq->ring_lock, flags);
 
-	if (amdgpu_ring_alloc(kiq_ring, 5 + 7 + 7 + kiq->pmf->map_queues_size)) {
+	if (amdgpu_ring_alloc(kiq_ring, 5 + 7 + 7)) {
 		spin_unlock_irqrestore(&kiq->ring_lock, flags);
 		return -ENOMEM;
 	}
@@ -9564,12 +9564,9 @@ static int gfx_v10_0_reset_kgq(struct amdgpu_ring *ring,
 			       0, 1, 0x20);
 	gfx_v10_0_ring_emit_reg_wait(kiq_ring,
 				     SOC15_REG_OFFSET(GC, 0, mmCP_VMID_RESET), 0, 0xffffffff);
-	kiq->pmf->kiq_map_queues(kiq_ring, ring);
 	amdgpu_ring_commit(kiq_ring);
-
-	spin_unlock_irqrestore(&kiq->ring_lock, flags);
-
 	r = amdgpu_ring_test_ring(kiq_ring);
+	spin_unlock_irqrestore(&kiq->ring_lock, flags);
 	if (r)
 		return r;
 
@@ -9579,6 +9576,19 @@ static int gfx_v10_0_reset_kgq(struct amdgpu_ring *ring,
 		return r;
 	}
 
+	spin_lock_irqsave(&kiq->ring_lock, flags);
+
+	if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size)) {
+		spin_unlock_irqrestore(&kiq->ring_lock, flags);
+		return -ENOMEM;
+	}
+	kiq->pmf->kiq_map_queues(kiq_ring, ring);
+	amdgpu_ring_commit(kiq_ring);
+	r = amdgpu_ring_test_ring(kiq_ring);
+	spin_unlock_irqrestore(&kiq->ring_lock, flags);
+	if (r)
+		return r;
+
 	r = amdgpu_ring_test_ring(ring);
 	if (r)
 		return r;