From: Alex Deucher <alexander.deucher@xxxxxxx>
Update the page table base address and flush the
VM TLB using the CP.
v2: update for 2 level PTs
v3: use new packet for invalidate
v4: update SH_MEM* regs when flushing the VM
v5: add pfp sync, go back to old style vm TLB invalidate
v6: fix hdp flush packet count
v7: use old style HDP flush
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/radeon/cik.c | 79 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 79 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 0cf04f3..ba242eb 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -2698,3 +2698,82 @@ void cik_vm_fini(struct radeon_device *rdev)
{
}
+/**
+ * cik_vm_flush - cik vm flush using the CP
+ *
+ * @rdev: radeon_device pointer
+ *
+ * Update the page table base and flush the VM TLB
+ * using the CP (CIK).
+ */
+void cik_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
+{
+ struct radeon_ring *ring = &rdev->ring[ridx];
+
+ if (vm == NULL)
+ return;
+
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ 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, 0);
+ radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
+
+ /* update SH_MEM_* regs */
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
+ radeon_ring_write(ring, 0);
+ radeon_ring_write(ring, VMID(vm->id));
+
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 6));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ radeon_ring_write(ring, SH_MEM_BASES >> 2);
+ radeon_ring_write(ring, 0);
+
+ radeon_ring_write(ring, 0); /* SH_MEM_BASES */
+ radeon_ring_write(ring, 0); /* SH_MEM_CONFIG */
+ radeon_ring_write(ring, 1); /* SH_MEM_APE1_BASE */
+ radeon_ring_write(ring, 0); /* SH_MEM_APE1_LIMIT */
+
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
+ radeon_ring_write(ring, 0);
+ radeon_ring_write(ring, VMID(0));
+
+ /* HDP flush */
+ /* We should be using the WAIT_REG_MEM packet here like in
+ * cik_fence_ring_emit(), but it causes the CP to hang in this
+ * context...
+ */
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ radeon_ring_write(ring, HDP_MEM_COHERENCY_FLUSH_CNTL >> 2);
+ radeon_ring_write(ring, 0);
+ radeon_ring_write(ring, 0);
+
+ /* bits 0-15 are the VM contexts0-15 */
+ radeon_ring_write(ring, PACKET3(PACKET3_WRITE_DATA, 3));
+ radeon_ring_write(ring, (WRITE_DATA_ENGINE_SEL(0) |
+ WRITE_DATA_DST_SEL(0)));
+ radeon_ring_write(ring, VM_INVALIDATE_REQUEST >> 2);
+ radeon_ring_write(ring, 0);
+ radeon_ring_write(ring, 1 << vm->id);
+
+ /* sync PFP to ME, otherwise we might get invalid PFP reads */
+ radeon_ring_write(ring, PACKET3(PACKET3_PFP_SYNC_ME, 0));
+ radeon_ring_write(ring, 0x0);
+}
+
--
1.7.7.5
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