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https://git.rwth-aachen.de/acs/public/villas/node/
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101 lines
2.5 KiB
C++
101 lines
2.5 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 <string>
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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/devices/pci_device.hpp>
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#include <villas/log.hpp>
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namespace villas {
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namespace kernel {
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namespace vfio {
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class Device {
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public:
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Device(const std::string &name, int groupFileDescriptor,
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const kernel::devices::PciDevice *pci_device = nullptr);
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~Device();
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// No copying allowed because we manage the vfio state in constructor and destructors
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Device(Device const &) = delete;
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void operator=(Device const &) = delete;
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bool reset();
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std::string getName() { return name; };
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// Map a device memory region to the application address space (e.g. PCI BARs)
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void *regionMap(size_t index);
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// munmap() a region which has been mapped by vfio_map_region()
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bool regionUnmap(size_t index);
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// Get the size of a device memory region
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size_t regionGetSize(size_t index);
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// Enable memory accesses and bus mastering for PCI device
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bool pciEnable();
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int pciMsiInit(int efds[32]);
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int pciMsiDeinit(int efds[32]);
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bool pciMsiFind(int nos[32]);
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bool isVfioPciDevice() const;
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bool pciHotReset();
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int getFileDescriptor() const { return fd; }
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std::vector<int> &getEventfdList() { return eventfdList; }
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void dump();
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bool isAttachedToGroup() const { return attachedToGroup; }
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void setAttachedToGroup() { this->attachedToGroup = true; }
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int getNumberIrqs() const { return this->info.num_irqs; }
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private:
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// Name of the device as listed under
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// /sys/kernel/iommu_groups/[vfio_group::index]/devices/
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std::string name;
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// VFIO device file descriptor
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int fd;
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bool attachedToGroup;
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int groupFd;
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// Interrupt eventfds
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std::vector<int> eventfdList;
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struct vfio_device_info info;
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std::vector<struct vfio_irq_info> irqs;
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std::vector<struct vfio_region_info> regions;
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std::vector<void *> mappings;
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// libpci handle of the device
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const kernel::devices::PciDevice *pci_device;
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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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