// SPDX-License-Identifier: GPL-2.0+
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/*
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* Standard Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include "../pci.h"
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#include "shpchp.h"
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int shpchp_configure_device(struct slot *p_slot)
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{
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struct pci_dev *dev;
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struct controller *ctrl = p_slot->ctrl;
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struct pci_dev *bridge = ctrl->pci_dev;
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struct pci_bus *parent = bridge->subordinate;
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int num, ret = 0;
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pci_lock_rescan_remove();
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dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
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if (dev) {
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ctrl_err(ctrl, "Device %s already exists at %04x:%02x:%02x, cannot hot-add\n",
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pci_name(dev), pci_domain_nr(parent),
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p_slot->bus, p_slot->device);
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pci_dev_put(dev);
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ret = -EINVAL;
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goto out;
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}
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num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
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if (num == 0) {
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ctrl_err(ctrl, "No new device found\n");
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ret = -ENODEV;
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goto out;
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}
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for_each_pci_bridge(dev, parent) {
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if (PCI_SLOT(dev->devfn) == p_slot->device)
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pci_hp_add_bridge(dev);
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}
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pci_assign_unassigned_bridge_resources(bridge);
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pcie_bus_configure_settings(parent);
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pci_bus_add_devices(parent);
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out:
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pci_unlock_rescan_remove();
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return ret;
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}
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void shpchp_unconfigure_device(struct slot *p_slot)
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{
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struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
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struct pci_dev *dev, *temp;
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struct controller *ctrl = p_slot->ctrl;
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ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
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__func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
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pci_lock_rescan_remove();
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list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
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if (PCI_SLOT(dev->devfn) != p_slot->device)
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continue;
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pci_dev_get(dev);
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pci_stop_and_remove_bus_device(dev);
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pci_dev_put(dev);
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}
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pci_unlock_rescan_remove();
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}
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