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86b5df0d2d
Add zpci_is_vf() helper based on the /sys/bus/pci/devices/<dev>/vfn attribute which is non-zero for VFs unlike the common code VF number which starts at 0. Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/**
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* @defgroup pci_list_h libzpci: zPCI device handling
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* @{
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* @brief Work with zPCI devices
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*
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* Copyright IBM Corp. 2024
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef LIB_ZPCI_PCI_LIST_H
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#define LIB_ZPCI_PCI_LIST_H
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#include <stdint.h>
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#include <stdbool.h>
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#include "util_list.h"
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enum zpci_pft {
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ZPCI_PFT_UNCLASSIFIED = 0x00,
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ZPCI_PFT_ROCE_EXPRESS = 0x02,
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ZPCI_PFT_ROCE_EXPRESS2 = 0x0a,
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ZPCI_PFT_CNW = 0x0d,
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ZPCI_PFT_NETH = 0x0c,
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ZPCI_PFT_NETD = 0x0f,
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ZPCI_PFT_NVME = 0x0b,
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ZPCI_PFT_ISM = 0x05
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};
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/*
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* Follows RFC 2863 operational states with the
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* numeric values from IF_OPER_* in linux/if.h:
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*/
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typedef uint8_t operstate_t;
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struct zpci_netdev {
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char *name;
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operstate_t operstate;
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};
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struct zpci_dev {
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struct util_list_node entry;
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/* PCI Domain */
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uint32_t domain_nr;
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/* PCI Bus (8 bits), Device (5 bits), Function (3 bits) */
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union {
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uint16_t val;
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struct {
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uint16_t bus : 8;
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uint16_t dev : 5;
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uint16_t fn : 3;
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};
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} bdf;
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/* Function attributes (see linux/Documentation/arch/s390/pci.rst) */
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uint32_t fid;
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uint32_t uid;
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uint16_t pchid;
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uint16_t vfn;
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uint8_t port;
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enum zpci_pft pft;
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bool uid_is_unique;
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/* Configuration state 0 - Standby, 1 Configured */
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bool conf;
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/* Associated netdevs if any */
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int num_netdevs;
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struct zpci_netdev *netdevs;
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};
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/**
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* Get if a PCI device is a PCI Virtual Function
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*
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* @param[in] zdev The device in question
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*
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* @return true if the device is a VF false otherwise
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*/
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static inline bool zpci_is_vf(struct zpci_dev *zdev)
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{
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return !!zdev->vfn;
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}
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struct util_list *zpci_dev_list(void);
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void zpci_free_dev_list(struct util_list *zpci_list);
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void zpci_free_dev(struct zpci_dev *zdev);
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char *zpci_pci_addr(struct zpci_dev *zdev);
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const char *zpci_pft_str(struct zpci_dev *zdev);
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const char *zpci_operstate_str(operstate_t state);
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operstate_t zpci_operstate_from_str(const char *oper_str);
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#endif /* LIB_ZPCI_PCI_LIST_H */
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