mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/* Virtual Function IO wrapper around kernel API.
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*
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* Author: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
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* Author: Steffen Vogel <post@steffenvogel.de>
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* Author: Daniel Krebs <github@daniel-krebs.net>
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* SPDX-FileCopyrightText: 2022-2023 Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
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* SPDX-FileCopyrightText: 2014-2023 Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2018 Daniel Krebs <github@daniel-krebs.net>
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <list>
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#include <memory>
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#include <vector>
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#include <linux/vfio.h>
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#include <sys/mman.h>
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#include <villas/kernel/vfio_group.hpp>
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namespace villas {
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namespace kernel {
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namespace vfio {
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// Backwards compatability with older kernels
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#ifdef VFIO_UPDATE_VADDR
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static constexpr size_t EXTENSION_SIZE = VFIO_UPDATE_VADDR + 1;
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#elif defined(VFIO_UNMAP_ALL)
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static constexpr size_t EXTENSION_SIZE = VFIO_UNMAP_ALL + 1;
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#else
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static constexpr size_t EXTENSION_SIZE = VFIO_NOIOMMU_IOMMU + 1;
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#endif
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class Container {
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public:
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Container(std::vector<std::string> required_modules = {"vfio"});
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// No copying allowed because we manage the vfio state in constructor and destructors
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Container(Container const &) = delete;
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void operator=(Container const &) = delete;
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~Container();
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void dump();
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void attachGroup(std::shared_ptr<Group> group);
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std::shared_ptr<Group> getOrAttachGroup(int index);
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std::shared_ptr<Device> attachDevice(const std::string &name, int groupIndex);
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std::shared_ptr<Device> attachDevice(pci::Device &pdev);
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// Map VM to an IOVA, which is accessible by devices in the container
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//
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// @param virt virtual address of memory
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// @param phys IOVA where to map @p virt, -1 to use VFIO internal allocator
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// @param length size of memory region in bytes
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// @return IOVA address, UINTPTR_MAX on failure
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uintptr_t memoryMap(uintptr_t virt, uintptr_t phys, size_t length);
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// munmap() a region which has been mapped by vfio_map_region()
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bool memoryUnmap(uintptr_t phys, size_t length);
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bool isIommuEnabled() const { return this->hasIommu; }
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private:
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int fd;
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int version;
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std::array<bool, EXTENSION_SIZE> extensions;
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uint64_t iova_next; // Next free IOVA address
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bool hasIommu;
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// All groups bound to this container
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std::list<std::shared_ptr<Group>> groups;
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Logger log;
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};
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} // namespace vfio
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} // namespace kernel
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} // namespace villas
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