drm/xe/vm: Add debug prints for SVM range prefetch

Introduce debug logs for the prefetch operation of SVM ranges.

Signed-off-by: Himal Prasad Ghimiray <[email protected]>
Reviewed-by: Matthew Brost <[email protected]>

Author: hghimira

drivers/gpu/drm/xe/xe_vm.c

@@ -2399,8 +2399,10 @@ vm_bind_ioctl_ops_create(struct xe_vm *vm, struct xe_vma_ops *vops,
 				goto unwind_prefetch_ops;
 			}
 
-			if (xe_svm_range_validate(vm, svm_range, tile_mask, !!prefetch_region))
+			if (xe_svm_range_validate(vm, svm_range, tile_mask, !!prefetch_region)) {
+				xe_svm_range_debug(svm_range, "PREFETCH - RANGE IS VALID");
 				goto check_next_range;
+			}
 
 			err = xa_alloc(&op->prefetch_range.range,
 				       &i, svm_range, xa_limit_32b,
@@ -2411,6 +2413,7 @@ vm_bind_ioctl_ops_create(struct xe_vm *vm, struct xe_vma_ops *vops,
 
 			op->prefetch_range.ranges_count++;
 			vops->flags |= XE_VMA_OPS_FLAG_HAS_SVM_PREFETCH;
+			xe_svm_range_debug(svm_range, "PREFETCH - RANGE CREATED");
 check_next_range:
 			if (range_end > xe_svm_range_end(svm_range) &&
 			    xe_svm_range_end(svm_range) < xe_vma_end(vma)) {
@@ -2911,6 +2914,7 @@ static int prefetch_ranges(struct xe_vm *vm, struct xe_vma_op *op)
 					vm->usm.asid, &vm->svm.gpusvm, ERR_PTR(err));
 				return -ENODATA;
 			}
+			xe_svm_range_debug(svm_range, "PREFETCH - RANGE MIGRATED TO VRAM");
 		}
 
 		err = xe_svm_range_get_pages(vm, svm_range, &ctx);
@@ -2921,6 +2925,7 @@ static int prefetch_ranges(struct xe_vm *vm, struct xe_vma_op *op)
 				vm->usm.asid, &vm->svm.gpusvm, ERR_PTR(err));
 			return err;
 		}
+		xe_svm_range_debug(svm_range, "PREFETCH - RANGE GET PAGES DONE");
 	}
 	return err;
 }