57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* File: portdrv_bus.c
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* Purpose: PCI Express Port Bus Driver's Bus Overloading Functions
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/pcieport_if.h>
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#include "portdrv.h"
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static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
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struct bus_type pcie_port_bus_type = {
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.name = "pci_express",
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.match = pcie_port_bus_match,
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};
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EXPORT_SYMBOL_GPL(pcie_port_bus_type);
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static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct pcie_device *pciedev;
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struct pcie_port_service_driver *driver;
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if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
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return 0;
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pciedev = to_pcie_device(dev);
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driver = to_service_driver(drv);
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if (driver->service != pciedev->service)
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return 0;
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if ((driver->port_type != PCIE_ANY_PORT) &&
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(driver->port_type != pci_pcie_type(pciedev->port)))
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return 0;
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return 1;
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}
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int pcie_port_bus_register(void)
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{
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return bus_register(&pcie_port_bus_type);
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}
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void pcie_port_bus_unregister(void)
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{
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bus_unregister(&pcie_port_bus_type);
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}
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