drm/amdgpu: fix and cleanup gmc_v11_0_flush_gpu_tlb_pasid

The same PASID can be used by more than one VMID, reset each of them.

Use the common KIQ handling.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c

@@ -303,54 +303,27 @@ static int gmc_v11_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
 					uint16_t pasid, uint32_t flush_type,
 					bool all_hub, uint32_t inst)
 {
+	uint16_t queried;
 	int vmid, i;
-	signed long r;
-	uint32_t seq;
-	uint16_t queried_pasid;
-	bool ret;
-	struct amdgpu_ring *ring = &adev->gfx.kiq[0].ring;
-	struct amdgpu_kiq *kiq = &adev->gfx.kiq[0];
-
-	if (amdgpu_emu_mode == 0 && ring->sched.ready) {
-		spin_lock(&adev->gfx.kiq[0].ring_lock);
-		/* 2 dwords flush + 8 dwords fence */
-		amdgpu_ring_alloc(ring, kiq->pmf->invalidate_tlbs_size + 8);
-		kiq->pmf->kiq_invalidate_tlbs(ring,
-					pasid, flush_type, all_hub);
-		r = amdgpu_fence_emit_polling(ring, &seq, MAX_KIQ_REG_WAIT);
-		if (r) {
-			amdgpu_ring_undo(ring);
-			spin_unlock(&adev->gfx.kiq[0].ring_lock);
-			return -ETIME;
-		}
-
-		amdgpu_ring_commit(ring);
-		spin_unlock(&adev->gfx.kiq[0].ring_lock);
-		r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout);
-		if (r < 1) {
-			dev_err(adev->dev, "wait for kiq fence error: %ld.\n", r);
-			return -ETIME;
-		}
-
-		return 0;
-	}
 
 	for (vmid = 1; vmid < 16; vmid++) {
-
-		ret = gmc_v11_0_get_vmid_pasid_mapping_info(adev, vmid,
-				&queried_pasid);
-		if (ret	&& queried_pasid == pasid) {
-			if (all_hub) {
-				for_each_set_bit(i, adev->vmhubs_mask, AMDGPU_MAX_VMHUBS)
-					gmc_v11_0_flush_gpu_tlb(adev, vmid,
-							i, flush_type);
-			} else {
-				gmc_v11_0_flush_gpu_tlb(adev, vmid,
-						AMDGPU_GFXHUB(0), flush_type);
-			}
+		bool valid;
+
+		valid = gmc_v11_0_get_vmid_pasid_mapping_info(adev, vmid,
+							      &queried);
+		if (!valid || queried == pasid)
+			continue;
+
+		if (all_hub) {
+			for_each_set_bit(i, adev->vmhubs_mask,
+					 AMDGPU_MAX_VMHUBS)
+				gmc_v11_0_flush_gpu_tlb(adev, vmid, i,
+							flush_type);
+		} else {
+			gmc_v11_0_flush_gpu_tlb(adev, vmid, AMDGPU_GFXHUB(0),
+						flush_type);
 		}
 	}
-
 	return 0;
 }
 
@@ -920,8 +893,10 @@ static int gmc_v11_0_gart_enable(struct amdgpu_device *adev)
 
 static int gmc_v11_0_hw_init(void *handle)
 {
-	int r;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	int r;
+
+	adev->gmc.flush_pasid_uses_kiq = !amdgpu_emu_mode;
 
 	/* The sequence of these two function calls matters.*/
 	gmc_v11_0_init_golden_registers(adev);