1 // Copyright 2017 The Fuchsia Authors 2 // 3 // Use of this source code is governed by a MIT-style 4 // license that can be found in the LICENSE file or at 5 // https://opensource.org/licenses/MIT 6 7 #pragma once 8 9 #include <dev/iommu.h> 10 #include <zircon/compiler.h> 11 #include <zircon/syscalls/iommu.h> 12 #include <ktl/unique_ptr.h> 13 14 class DummyIommu final : public Iommu { 15 public: 16 static zx_status_t Create(ktl::unique_ptr<const uint8_t[]> desc, size_t desc_len, 17 fbl::RefPtr<Iommu>* out); 18 19 bool IsValidBusTxnId(uint64_t bus_txn_id) const final; 20 21 zx_status_t Map(uint64_t bus_txn_id, const fbl::RefPtr<VmObject>& vmo, 22 uint64_t offset, size_t size, uint32_t perms, 23 dev_vaddr_t* vaddr, size_t* mapped_len) final; 24 zx_status_t MapContiguous(uint64_t bus_txn_id, const fbl::RefPtr<VmObject>& vmo, 25 uint64_t offset, size_t size, uint32_t perms, 26 dev_vaddr_t* vaddr, size_t* mapped_len) final; 27 zx_status_t Unmap(uint64_t bus_txn_id, dev_vaddr_t vaddr, size_t size) final; 28 29 zx_status_t ClearMappingsForBusTxnId(uint64_t bus_txn_id) final; 30 31 uint64_t minimum_contiguity(uint64_t bus_txn_id) final; 32 uint64_t aspace_size(uint64_t bus_txn_id) final; 33 34 ~DummyIommu() final; 35 36 DISALLOW_COPY_ASSIGN_AND_MOVE(DummyIommu); 37 private: 38 DummyIommu(); 39 }; 40