drm/radeon: drop radeon_ring_force_activity

The reason for the false positives was fixed quite some time ago and since
most engines can still execute NOPs while being locked up it leads to false
negatives.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

13 files changed, 1 insertions, 60 deletions

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 835dcfb78916..92e38b54efb9 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -5118,8 +5118,6 @@ bool cik_gfx_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c
index e474760d714c..00150ac49cd2 100644
--- a/drivers/gpu/drm/radeon/cik_sdma.c
+++ b/drivers/gpu/drm/radeon/cik_sdma.c
@@ -714,8 +714,6 @@ bool cik_sdma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force ring activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index d9156be5b9a6..c78d8ece9504 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3953,8 +3953,6 @@ bool evergreen_gfx_is_lockup(struct radeon_device *rdev, struct radeon_ring *rin
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/evergreen_dma.c b/drivers/gpu/drm/radeon/evergreen_dma.c
index d448961e9ab2..287fe966d7de 100644
--- a/drivers/gpu/drm/radeon/evergreen_dma.c
+++ b/drivers/gpu/drm/radeon/evergreen_dma.c
@@ -177,8 +177,6 @@ bool evergreen_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *rin
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force ring activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 7601532b7372..85168ecd216b 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1920,8 +1920,6 @@ bool cayman_gfx_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/ni_dma.c b/drivers/gpu/drm/radeon/ni_dma.c
index 95e533c61f83..6378e0276691 100644
--- a/drivers/gpu/drm/radeon/ni_dma.c
+++ b/drivers/gpu/drm/radeon/ni_dma.c
@@ -303,8 +303,6 @@ bool cayman_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force ring activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 3a7438163d06..1690a2dc0721 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2525,8 +2525,6 @@ bool r100_gpu_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 085e02590dcf..0f4ab928a15a 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1751,8 +1751,6 @@ bool r600_gfx_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/r600_dma.c b/drivers/gpu/drm/radeon/r600_dma.c
index 6944e1988426..53fcb28f5578 100644
--- a/drivers/gpu/drm/radeon/r600_dma.c
+++ b/drivers/gpu/drm/radeon/r600_dma.c
@@ -222,8 +222,6 @@ bool r600_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force ring activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index e1c4f9c6772b..a415f8e9d972 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -956,7 +956,6 @@ void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *c
 void radeon_ring_undo(struct radeon_ring *ring);
 void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *cp);
 int radeon_ring_test(struct radeon_device *rdev, struct radeon_ring *cp);
-void radeon_ring_force_activity(struct radeon_device *rdev, struct radeon_ring *ring);
 void radeon_ring_lockup_update(struct radeon_device *rdev,
                                struct radeon_ring *ring);
 bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *ring);
diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 0f78789d085a..668097abb424 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -479,28 +479,6 @@ void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *rin
 }
 
 /**
- * radeon_ring_force_activity - add some nop packets to the ring
- *
- * @rdev: radeon_device pointer
- * @ring: radeon_ring structure holding ring information
- *
- * Add some nop packets to the ring to force activity (all asics).
- * Used for lockup detection to see if the rptr is advancing.
- */
-void radeon_ring_force_activity(struct radeon_device *rdev, struct radeon_ring *ring)
-{
-        int r;
-
-        if (radeon_ring_get_rptr(rdev, ring) == ring->wptr) {
-                r = radeon_ring_alloc(rdev, ring, 1);
-                if (!r) {
-                        radeon_ring_write(ring, ring->nop);
-                        radeon_ring_commit(rdev, ring);
-                }
-        }
-}
-
-/**
  * radeon_ring_lockup_update - update lockup variables
  *
  * @ring: radeon_ring structure holding ring information
@@ -519,21 +497,7 @@ void radeon_ring_lockup_update(struct radeon_device *rdev,
  * @rdev:       radeon device structure
  * @ring:       radeon_ring structure holding ring information
  *
- * We don't need to initialize the lockup tracking information as we will either
- * have CP rptr to a different value of jiffies wrap around which will force
- * initialization of the lockup tracking informations.
- *
- * A possible false positivie is if we get call after while and last_cp_rptr ==
- * the current CP rptr, even if it's unlikely it might happen. To avoid this
- * if the elapsed time since last call is bigger than 2 second than we return
- * false and update the tracking information. Due to this the caller must call
- * radeon_ring_test_lockup several time in less than 2sec for lockup to be reported
- * the fencing code should be cautious about that.
- *
- * Caller should write to the ring to force CP to do something so we don't get
- * false positive when CP is just gived nothing to do.
- *
- **/
+ */
 bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 {
         uint32_t rptr = radeon_ring_get_rptr(rdev, ring);
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index b406a48ef202..8008cb8d5324 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -3869,8 +3869,6 @@ bool si_gfx_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force CP activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }
 
diff --git a/drivers/gpu/drm/radeon/si_dma.c b/drivers/gpu/drm/radeon/si_dma.c
index c75f5337f462..cf0fdad8c278 100644
--- a/drivers/gpu/drm/radeon/si_dma.c
+++ b/drivers/gpu/drm/radeon/si_dma.c
@@ -52,8 +52,6 @@ bool si_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
                 radeon_ring_lockup_update(rdev, ring);
                 return false;
         }
-        /* force ring activities */
-        radeon_ring_force_activity(rdev, ring);
         return radeon_ring_test_lockup(rdev, ring);
 }