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https://git.rwth-aachen.de/acs/public/villas/node/
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92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/** Linux PCI helpers
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/** @addtogroup fpga Kernel @{ */
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <villas/list.h>
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#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
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#define PCI_FUNC(devfn) ((devfn) & 0x07)
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struct pci_device {
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struct {
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int vendor;
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int device;
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int class_code;
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} id;
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struct {
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int domain;
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int bus;
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int device;
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int function;
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} slot; /**< Bus, Device, Function (BDF) */
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};
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struct pci_region {
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int num;
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uintptr_t start;
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uintptr_t end;
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unsigned long long flags;
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};
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struct pci {
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struct vlist devices; /**< List of available PCI devices in the system (struct pci_device) */
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};
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/** Initialize Linux PCI handle.
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*
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* This search for all available PCI devices under /sys/bus/pci
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*
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int pci_init(struct pci *p);
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/** Destroy handle. */
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int pci_destroy(struct pci *p);
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int pci_device_parse_slot(struct pci_device *f, const char *str, const char **error);
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int pci_device_parse_id(struct pci_device *f, const char *str, const char **error);
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int pci_device_compare(const struct pci_device *d, const struct pci_device *f);
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struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *filter);
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/** Get currently loaded driver for device */
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int pci_get_driver(const struct pci_device *d, char *buf, size_t buflen);
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/** Bind a new LKM to the PCI device */
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int pci_attach_driver(const struct pci_device *d, const char *driver);
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/** Return the IOMMU group of this PCI device or -1 if the device is not in a group. */
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int pci_get_iommu_group(const struct pci_device *d);
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size_t pci_get_regions(const struct pci_device *d, struct pci_region** regions);
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/** @} */
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