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* In most cases, @pci_bus, @slot_nr will be sufficient to uniquely identify// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2006 Matthew Wilcox <matthew@wil.cx> * Copyright (C) 2006-2009 Hewlett-Packard Development Company, L.P. * Alex Chiang <achiang@hp.com> */struct kset *pci_slots_kset;EXPORT_SYMBOL_GPL(pci_slots_kset);static ssize_t pci_slot_attr_show(struct kobject *kobj, struct attribute *attr, char *buf){ struct pci_slot *slot = to_pci_slot(kobj); struct pci_slot_attribute *attribute = to_pci_slot_attr(attr); return attribute->show ? attribute->show(slot, buf) : -EIO;}static ssize_t pci_slot_attr_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t len){ struct pci_slot *slot = to_pci_slot(kobj); struct pci_slot_attribute *attribute = to_pci_slot_attr(attr); return attribute->store ? attribute->store(slot, buf, len) : -EIO;}static const struct sysfs_ops pci_slot_sysfs_ops = { .show = pci_slot_attr_show, .store = pci_slot_attr_store,};static ssize_t address_read_file(struct pci_slot *slot, char *buf){ if (slot->number == 0xff) return sprintf(buf, "%04x:%02x\n", pci_domain_nr(slot->bus), slot->bus->number); else return sprintf(buf, "%04x:%02x:%02x\n", pci_domain_nr(slot->bus), slot->bus->number, slot->number);}/* these strings match up with the values in pci_bus_speed */static const char *pci_bus_speed_strings[] = { "33 MHz PCI", /* 0x00 */ "66 MHz PCI", /* 0x01 */ "66 MHz PCI-X", /* 0x02 */ "100 MHz PCI-X", /* 0x03 */ "133 MHz PCI-X", /* 0x04 */ NULL, /* 0x05 */ NULL, /* 0x06 */ NULL, /* 0x07 */ NULL, /* 0x08 */ "66 MHz PCI-X 266", /* 0x09 */ "100 MHz PCI-X 266", /* 0x0a */ "133 MHz PCI-X 266", /* 0x0b */ "Unknown AGP", /* 0x0c */ "1x AGP", /* 0x0d */ "2x AGP", /* 0x0e */ "4x AGP", /* 0x0f */ "8x AGP", /* 0x10 */ "66 MHz PCI-X 533", /* 0x11 */ "100 MHz PCI-X 533", /* 0x12 */ "133 MHz PCI-X 533", /* 0x13 */ "2.5 GT/s PCIe", /* 0x14 */ "5.0 GT/s PCIe", /* 0x15 */ "8.0 GT/s PCIe", /* 0x16 */ "16.0 GT/s PCIe", /* 0x17 */};static ssize_t bus_speed_read(enum pci_bus_speed speed, char *buf){ const char *speed_string; if (speed < ARRAY_SIZE(pci_bus_speed_strings)) speed_string = pci_bus_speed_strings[speed]; else speed_string = "Unknown"; return sprintf(buf, "%s\n", speed_string);}static ssize_t max_speed_read_file(struct pci_slot *slot, char *buf)