drm/amdgpu: use kiq to do invalidate tlb

To avoid the tlb flush not interrupted by world switch, use kiq and one
command to do tlb invalidate.

v2:
Refine the invalidate lock position.

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-and-Tested-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6265b88135fc..19ef7711d944 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -212,6 +212,10 @@ enum amdgpu_kiq_irq {
         AMDGPU_CP_KIQ_IRQ_LAST
 };
 
+#define MAX_KIQ_REG_WAIT       5000 /* in usecs, 5ms */
+#define MAX_KIQ_REG_BAILOUT_INTERVAL   5 /* in msecs, 5ms */
+#define MAX_KIQ_REG_TRY 20
+
 int amdgpu_device_ip_set_clockgating_state(void *dev,
                                            enum amd_ip_block_type block_type,
                                            enum amd_clockgating_state state);