drm/amdgpu: add PASID mapping for GMC v7

This way we can see the PASID in VM faults.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/cik.h

@@ -24,7 +24,7 @@
 #ifndef __CIK_H__
 #define __CIK_H__
 
-#define CIK_FLUSH_GPU_TLB_NUM_WREG	2
+#define CIK_FLUSH_GPU_TLB_NUM_WREG	3
 
 void cik_srbm_select(struct amdgpu_device *adev,
 		     u32 me, u32 pipe, u32 queue, u32 vmid);

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -447,6 +447,8 @@ static uint64_t gmc_v7_0_emit_flush_gpu_tlb(struct amdgpu_ring *ring,
 		reg = mmVM_CONTEXT8_PAGE_TABLE_BASE_ADDR + vmid - 8;
 	amdgpu_ring_emit_wreg(ring, reg, pd_addr >> 12);
 
+	amdgpu_ring_emit_wreg(ring, mmIH_VMID_0_LUT + vmid, pasid);
+
 	/* bits 0-15 are the VM contexts0-15 */
 	amdgpu_ring_emit_wreg(ring, mmVM_INVALIDATE_REQUEST, 1 << vmid);