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VILLASnode/common/include/villas/kernel/vfio_device.hpp
Pascal Bauer 23af32d25e add get method getNumberIrqs()
Signed-off-by: Pascal Bauer <pascal.bauer@rwth-aachen.de>
2024-09-25 15:15:24 +02:00

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2.5 KiB
C++

/* Virtual Function IO wrapper around kernel API.
*
* Author: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
* Author: Steffen Vogel <post@steffenvogel.de>
* Author: Daniel Krebs <github@daniel-krebs.net>
* SPDX-FileCopyrightText: 2022-2023 Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
* SPDX-FileCopyrightText: 2014-2023 Steffen Vogel <post@steffenvogel.de>
* SPDX-FileCopyrightText: 2018 Daniel Krebs <github@daniel-krebs.net>
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <list>
#include <memory>
#include <string>
#include <vector>
#include <linux/vfio.h>
#include <sys/mman.h>
#include <villas/kernel/devices/pci_device.hpp>
#include <villas/log.hpp>
namespace villas {
namespace kernel {
namespace vfio {
class Device {
public:
Device(const std::string &name, int groupFileDescriptor,
const kernel::devices::PciDevice *pci_device = nullptr);
~Device();
// No copying allowed because we manage the vfio state in constructor and destructors
Device(Device const &) = delete;
void operator=(Device const &) = delete;
bool reset();
std::string getName() { return name; };
// Map a device memory region to the application address space (e.g. PCI BARs)
void *regionMap(size_t index);
// munmap() a region which has been mapped by vfio_map_region()
bool regionUnmap(size_t index);
// Get the size of a device memory region
size_t regionGetSize(size_t index);
// Enable memory accesses and bus mastering for PCI device
bool pciEnable();
int pciMsiInit(int efds[32]);
int pciMsiDeinit(int efds[32]);
bool pciMsiFind(int nos[32]);
bool isVfioPciDevice() const;
bool pciHotReset();
int getFileDescriptor() const { return fd; }
std::vector<int> &getEventfdList() { return eventfdList; }
void dump();
bool isAttachedToGroup() const { return attachedToGroup; }
void setAttachedToGroup() { this->attachedToGroup = true; }
int getNumberIrqs() const { return this->info.num_irqs; }
private:
// Name of the device as listed under
// /sys/kernel/iommu_groups/[vfio_group::index]/devices/
std::string name;
// VFIO device file descriptor
int fd;
bool attachedToGroup;
int groupFd;
// Interrupt eventfds
std::vector<int> eventfdList;
struct vfio_device_info info;
std::vector<struct vfio_irq_info> irqs;
std::vector<struct vfio_region_info> regions;
std::vector<void *> mappings;
// libpci handle of the device
const kernel::devices::PciDevice *pci_device;
Logger log;
};
} // namespace vfio
} // namespace kernel
} // namespace villas