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VILLASnode/include/villas/kernel/pci.h

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1.5 KiB
C

/** Linux PCI helpers
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Steffen Vogel
**********************************************************************************/
/** @addtogroup fpga Kernel @{ */
#pragma once
#include "list.h"
#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn) ((devfn) & 0x07)
struct pci_device {
struct {
int vendor;
int device;
int class;
} id;
struct {
int domain;
int bus;
int device;
int function;
} slot; /**< Bus, Device, Function (BDF) */
};
struct pci {
struct list devices; /**< List of available PCI devices in the system (struct pci_device) */
};
/** Initialize Linux PCI handle.
*
* This search for all available PCI devices under /sys/bus/pci
*
* @retval 0 Success. Everything went well.
* @retval <0 Error. Something went wrong.
*/
int pci_init(struct pci *p);
/** Destroy handle. */
int pci_destroy(struct pci *p);
int pci_device_parse_slot(struct pci_device *f, const char *str, const char **error);
int pci_device_parse_id(struct pci_device *f, const char *str, const char **error);
int pci_device_compare(const struct pci_device *d, const struct pci_device *f);
struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *filter);
/** Bind a new LKM to the PCI device */
int pci_attach_driver(struct pci_device *d, const char *driver);
/** Return the IOMMU group of this PCI device or -1 if the device is not in a group. */
int pci_get_iommu_group(struct pci_device *d);
/** @} */