forked from Minki/linux
8b245e45f3
Here is the updated patch to get pciehp driver to work for downstream port of a switch and handle the difference in the offset value of PCI Express capability list item of different ports. Signed-off-by: Dely Sy <dely.l.sy@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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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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static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
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static int pcie_port_bus_suspend(struct device *dev, pm_message_t state);
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static int pcie_port_bus_resume(struct device *dev);
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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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.suspend = pcie_port_bus_suspend,
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.resume = pcie_port_bus_resume,
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};
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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->id_table->vendor != PCI_ANY_ID &&
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driver->id_table->vendor != pciedev->id.vendor) ||
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(driver->id_table->device != PCI_ANY_ID &&
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driver->id_table->device != pciedev->id.device) ||
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(driver->id_table->port_type != PCIE_ANY_PORT &&
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driver->id_table->port_type != pciedev->id.port_type) ||
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driver->id_table->service_type != pciedev->id.service_type )
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return 0;
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return 1;
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}
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static int pcie_port_bus_suspend(struct device *dev, pm_message_t state)
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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 (!dev || !dev->driver)
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return 0;
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pciedev = to_pcie_device(dev);
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driver = to_service_driver(dev->driver);
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if (driver && driver->suspend)
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driver->suspend(pciedev, state);
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return 0;
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}
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static int pcie_port_bus_resume(struct device *dev)
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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 (!dev || !dev->driver)
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return 0;
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pciedev = to_pcie_device(dev);
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driver = to_service_driver(dev->driver);
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if (driver && driver->resume)
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driver->resume(pciedev);
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return 0;
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}
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