From: Alex Deucher <alexander.deucher@xxxxxxx>
Update the page table base address and flush the
VM TLB using the sDMA.
V2: update for 2 level PTs
V3: update vm flush
V4: update SH_MEM* regs
V5: switch back to old style VM TLB invalidate
V6: fix packet formatting
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/radeon/cik.c | 70 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 931169e..3c18a63 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -3407,6 +3407,76 @@ void cik_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
radeon_ring_write(ring, 0x0);
}
+/**
+ * cik_dma_vm_flush - cik vm flush using sDMA
+ *
+ * @rdev: radeon_device pointer
+ *
+ * Update the page table base and flush the VM TLB
+ * using sDMA (CIK).
+ */
+void cik_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
+{
+ 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 (vm == NULL)
+ return;
+
+ if (ridx == R600_RING_TYPE_DMA_INDEX)
+ ref_and_mask = SDMA0;
+ else
+ ref_and_mask = SDMA1;
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ if (vm->id < 8) {
+ radeon_ring_write(ring, (VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2);
+ } else {
+ radeon_ring_write(ring, (VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm->id - 8) << 2)) >> 2);
+ }
+ radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
+
+ /* update SH_MEM_* regs */
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
+ radeon_ring_write(ring, VMID(vm->id));
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SH_MEM_BASES >> 2);
+ radeon_ring_write(ring, 0);
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SH_MEM_CONFIG >> 2);
+ radeon_ring_write(ring, 0);
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SH_MEM_APE1_BASE >> 2);
+ radeon_ring_write(ring, 1);
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SH_MEM_APE1_LIMIT >> 2);
+ radeon_ring_write(ring, 0);
+
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
+ radeon_ring_write(ring, VMID(0));
+
+ /* 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, (4 << 16) | 10); /* RETRY_COUNT, POLL_INTERVAL */
+
+ /* flush TLB */
+ radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
+ radeon_ring_write(ring, VM_INVALIDATE_REQUEST >> 2);
+ radeon_ring_write(ring, 1 << vm->id);
+}
+
/*
* RLC
* The RLC is a multi-purpose microengine that handles a
--
1.7.7.5
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