1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Standard Hot Plug Controller Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 1995,2001 Compaq Computer Corporation
6*4882a593Smuzhiyun * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
7*4882a593Smuzhiyun * Copyright (C) 2001 IBM Corp.
8*4882a593Smuzhiyun * Copyright (C) 2003-2004 Intel Corporation
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * All rights reserved.
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/kernel.h>
18*4882a593Smuzhiyun #include <linux/types.h>
19*4882a593Smuzhiyun #include <linux/pci.h>
20*4882a593Smuzhiyun #include "../pci.h"
21*4882a593Smuzhiyun #include "shpchp.h"
22*4882a593Smuzhiyun
shpchp_configure_device(struct slot * p_slot)23*4882a593Smuzhiyun int shpchp_configure_device(struct slot *p_slot)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun struct pci_dev *dev;
26*4882a593Smuzhiyun struct controller *ctrl = p_slot->ctrl;
27*4882a593Smuzhiyun struct pci_dev *bridge = ctrl->pci_dev;
28*4882a593Smuzhiyun struct pci_bus *parent = bridge->subordinate;
29*4882a593Smuzhiyun int num, ret = 0;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun pci_lock_rescan_remove();
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
34*4882a593Smuzhiyun if (dev) {
35*4882a593Smuzhiyun ctrl_err(ctrl, "Device %s already exists at %04x:%02x:%02x, cannot hot-add\n",
36*4882a593Smuzhiyun pci_name(dev), pci_domain_nr(parent),
37*4882a593Smuzhiyun p_slot->bus, p_slot->device);
38*4882a593Smuzhiyun pci_dev_put(dev);
39*4882a593Smuzhiyun ret = -EINVAL;
40*4882a593Smuzhiyun goto out;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
44*4882a593Smuzhiyun if (num == 0) {
45*4882a593Smuzhiyun ctrl_err(ctrl, "No new device found\n");
46*4882a593Smuzhiyun ret = -ENODEV;
47*4882a593Smuzhiyun goto out;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun for_each_pci_bridge(dev, parent) {
51*4882a593Smuzhiyun if (PCI_SLOT(dev->devfn) == p_slot->device)
52*4882a593Smuzhiyun pci_hp_add_bridge(dev);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun pci_assign_unassigned_bridge_resources(bridge);
56*4882a593Smuzhiyun pcie_bus_configure_settings(parent);
57*4882a593Smuzhiyun pci_bus_add_devices(parent);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun out:
60*4882a593Smuzhiyun pci_unlock_rescan_remove();
61*4882a593Smuzhiyun return ret;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
shpchp_unconfigure_device(struct slot * p_slot)64*4882a593Smuzhiyun void shpchp_unconfigure_device(struct slot *p_slot)
65*4882a593Smuzhiyun {
66*4882a593Smuzhiyun struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
67*4882a593Smuzhiyun struct pci_dev *dev, *temp;
68*4882a593Smuzhiyun struct controller *ctrl = p_slot->ctrl;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
71*4882a593Smuzhiyun __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun pci_lock_rescan_remove();
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
76*4882a593Smuzhiyun if (PCI_SLOT(dev->devfn) != p_slot->device)
77*4882a593Smuzhiyun continue;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun pci_dev_get(dev);
80*4882a593Smuzhiyun pci_stop_and_remove_bus_device(dev);
81*4882a593Smuzhiyun pci_dev_put(dev);
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun pci_unlock_rescan_remove();
85*4882a593Smuzhiyun }
86