[PATCH 1/1] drm/amdgpu: wrap kiq ring ops with kiq spinlock

[Nirmoy Das]

KIQ ring is being operated by kfd as well as amdgpu.
KFD is using kiq lock, we should the same from amdgpu side
as well.

Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 1915b9b95106..8fe370e5358d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -467,13 +467,17 @@ int amdgpu_gfx_disable_kcq(struct amdgpu_device *adev)
 	if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
 		return -EINVAL;
 
+	spin_lock(&adev->gfx.kiq.ring_lock);
 	if (amdgpu_ring_alloc(kiq_ring, kiq->pmf->unmap_queues_size *
-					adev->gfx.num_compute_rings))
+					adev->gfx.num_compute_rings)) {
+		spin_unlock(&adev->gfx.kiq.ring_lock);
 		return -ENOMEM;
+	}
 
 	for (i = 0; i < adev->gfx.num_compute_rings; i++)
 		kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.compute_ring[i],
 					   RESET_QUEUES, 0, 0);
+	spin_unlock(&adev->gfx.kiq.ring_lock);
 
 	return amdgpu_ring_test_helper(kiq_ring);
 }
@@ -518,18 +522,20 @@ int amdgpu_gfx_enable_kcq(struct amdgpu_device *adev)
 
 	DRM_INFO("kiq ring mec %d pipe %d q %d\n", kiq_ring->me, kiq_ring->pipe,
 							kiq_ring->queue);
-
+	spin_lock(&adev->gfx.kiq.ring_lock);
 	r = amdgpu_ring_alloc(kiq_ring, kiq->pmf->map_queues_size *
 					adev->gfx.num_compute_rings +
 					kiq->pmf->set_resources_size);
 	if (r) {
 		DRM_ERROR("Failed to lock KIQ (%d).\n", r);
+		spin_unlock(&adev->gfx.kiq.ring_lock);
 		return r;
 	}
 
 	kiq->pmf->kiq_set_resources(kiq_ring, queue_mask);
 	for (i = 0; i < adev->gfx.num_compute_rings; i++)
 		kiq->pmf->kiq_map_queues(kiq_ring, &adev->gfx.compute_ring[i]);
+	spin_unlock(&adev->gfx.kiq.ring_lock);
 
 	r = amdgpu_ring_test_helper(kiq_ring);
 	if (r)
-- 
2.30.1