drm/amdgpu: support cond exec
This adds the groundwork for conditional execution on
SDMA which is necessary for preemption.
Signed-off-by: Monk Liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 8443cea..a15d690 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -160,6 +160,9 @@
amdgpu_ring_emit_hdp_flush(ring);
}
+ /* always set cond_exec_polling to CONTINUE */
+ *ring->cond_exe_cpu_addr = 1;
+
old_ctx = ring->current_ctx;
for (i = 0; i < num_ibs; ++i) {
ib = &ibs[i];