1/*
2 * Standard Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT.  See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
27 *
28 */
29
30#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
33#include <linux/pci.h>
34#include "../pci.h"
35#include "shpchp.h"
36
37int shpchp_configure_device(struct slot *p_slot)
38{
39	struct pci_dev *dev;
40	struct controller *ctrl = p_slot->ctrl;
41	struct pci_dev *bridge = ctrl->pci_dev;
42	struct pci_bus *parent = bridge->subordinate;
43	int num, ret = 0;
44
45	pci_lock_rescan_remove();
46
47	dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
48	if (dev) {
49		ctrl_err(ctrl, "Device %s already exists at %04x:%02x:%02x, cannot hot-add\n",
50			 pci_name(dev), pci_domain_nr(parent),
51			 p_slot->bus, p_slot->device);
52		pci_dev_put(dev);
53		ret = -EINVAL;
54		goto out;
55	}
56
57	num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
58	if (num == 0) {
59		ctrl_err(ctrl, "No new device found\n");
60		ret = -ENODEV;
61		goto out;
62	}
63
64	list_for_each_entry(dev, &parent->devices, bus_list) {
65		if (PCI_SLOT(dev->devfn) != p_slot->device)
66			continue;
67		if (pci_is_bridge(dev))
68			pci_hp_add_bridge(dev);
69	}
70
71	pci_assign_unassigned_bridge_resources(bridge);
72	pcie_bus_configure_settings(parent);
73	pci_bus_add_devices(parent);
74
75 out:
76	pci_unlock_rescan_remove();
77	return ret;
78}
79
80int shpchp_unconfigure_device(struct slot *p_slot)
81{
82	int rc = 0;
83	u8 bctl = 0;
84	struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
85	struct pci_dev *dev, *temp;
86	struct controller *ctrl = p_slot->ctrl;
87
88	ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
89		 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
90
91	pci_lock_rescan_remove();
92
93	list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
94		if (PCI_SLOT(dev->devfn) != p_slot->device)
95			continue;
96
97		pci_dev_get(dev);
98		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
99			pci_read_config_byte(dev, PCI_BRIDGE_CONTROL, &bctl);
100			if (bctl & PCI_BRIDGE_CTL_VGA) {
101				ctrl_err(ctrl,
102					 "Cannot remove display device %s\n",
103					 pci_name(dev));
104				pci_dev_put(dev);
105				rc = -EINVAL;
106				break;
107			}
108		}
109		pci_stop_and_remove_bus_device(dev);
110		pci_dev_put(dev);
111	}
112
113	pci_unlock_rescan_remove();
114	return rc;
115}
116
117