Flush via the ring works differently on CIK and requires a
special sequence.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/radeon/cik_sdma.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c
index 0300727..00984d8 100644
--- a/drivers/gpu/drm/radeon/cik_sdma.c
+++ b/drivers/gpu/drm/radeon/cik_sdma.c
@@ -87,6 +87,28 @@ void cik_sdma_ring_ib_execute(struct radeon_device *rdev,
}
+static void cik_sdma_hdp_flush(struct radeon_device *rdev,
+ int ridx)
+{
+ struct radeon_ring *ring = &rdev->ring[ridx];
+ u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(1) |
+ SDMA_POLL_REG_MEM_EXTRA_FUNC(3)); /* == */
+ u32 ref_and_mask;
+
+ if (ridx == R600_RING_TYPE_DMA_INDEX)
+ ref_and_mask = SDMA0;
+ else
+ ref_and_mask = SDMA1;
+
+ /* flush HDP */
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_POLL_REG_MEM, 0, extra_bits));
+ radeon_ring_write(ring, GPU_HDP_FLUSH_DONE);
+ radeon_ring_write(ring, GPU_HDP_FLUSH_REQ);
+ radeon_ring_write(ring, ref_and_mask); /* REFERENCE */
+ radeon_ring_write(ring, ref_and_mask); /* MASK */
+ radeon_ring_write(ring, (0xfff << 16) | 10); /* RETRY_COUNT, POLL_INTERVAL */
+}
+
/**
* cik_sdma_fence_ring_emit - emit a fence on the DMA ring
*
@@ -111,12 +133,7 @@ void cik_sdma_fence_ring_emit(struct radeon_device *rdev,
/* generate an interrupt */
radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_TRAP, 0, 0));
/* flush HDP */
- /* We should be using the new POLL_REG_MEM special op packet here
- * but it causes sDMA to hang sometimes
- */
- radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
- radeon_ring_write(ring, HDP_MEM_COHERENCY_FLUSH_CNTL >> 2);
- radeon_ring_write(ring, 0);
+ cik_sdma_hdp_flush(rdev, fence->ring);
}
/**
@@ -747,12 +764,7 @@ void cik_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm
radeon_ring_write(ring, VMID(0));
/* flush HDP */
- /* We should be using the new POLL_REG_MEM special op packet here
- * but it causes sDMA to hang sometimes
- */
- radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
- radeon_ring_write(ring, HDP_MEM_COHERENCY_FLUSH_CNTL >> 2);
- radeon_ring_write(ring, 0);
+ cik_sdma_hdp_flush(rdev, ridx);
/* flush TLB */
radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
--
1.8.3.1
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