drm/amdgpu/gfx10: remove unnecessary waiting on gfx inactive

The following KIQ ring test could guarantee the previous unmap
has been done.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 80b100c..b7b761f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3541,9 +3541,8 @@ static int gfx_v10_0_hw_init(void *handle)
 static int gfx_v10_0_kiq_disable_kgq(struct amdgpu_device *adev)
 {
        struct amdgpu_kiq *kiq = &adev->gfx.kiq;
-       struct amdgpu_ring *ring, *kiq_ring = &kiq->ring;
-       struct v10_gfx_mqd *mqd;
-       int r, i, j;
+       struct amdgpu_ring *kiq_ring = &kiq->ring;
+       int i;
 
        if (!kiq->pmf || !kiq->pmf->kiq_unmap_queues)
                return -EINVAL;
@@ -3552,33 +3551,9 @@ static int gfx_v10_0_kiq_disable_kgq(struct amdgpu_device *adev)
                                        adev->gfx.num_gfx_rings))
                return -ENOMEM;
 
-       for (i = 0; i < adev->gfx.num_gfx_rings; i++) {
-               ring = &adev->gfx.gfx_ring[i];
-
-               r = amdgpu_bo_reserve(ring->mqd_obj, false);
-               if (unlikely(r != 0))
-                       return r;
-
-               r = amdgpu_bo_kmap(ring->mqd_obj, (void **)&ring->mqd_ptr);
-               if (!r) {
-                       kiq->pmf->kiq_unmap_queues(kiq_ring, ring,
-                                                  PREEMPT_QUEUES, 0, 0);
-                       mqd = ring->mqd_ptr;
-
-                       for (j = 0; j < adev->usec_timeout; j++) {
-                               if (!mqd->cp_gfx_hqd_active)
-                                       break;
-                               udelay(1);
-                       }
-
-                       if (j == adev->usec_timeout)
-                               DRM_ERROR("failed to wait for gfx inactive\n");
-
-                       amdgpu_bo_kunmap(ring->mqd_obj);
-                       ring->mqd_ptr = NULL;
-               }
-               amdgpu_bo_unreserve(ring->mqd_obj);
-       }
+       for (i = 0; i < adev->gfx.num_gfx_rings; i++)
+               kiq->pmf->kiq_unmap_queues(kiq_ring, &adev->gfx.gfx_ring[i],
+                                          PREEMPT_QUEUES, 0, 0);
 
        return amdgpu_ring_test_ring(kiq_ring);
 }