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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 __ref shpchp_configure_device(struct slot *p_slot)
38{
39 struct pci_dev *dev;
40 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
41 int num, fn;
42 struct controller *ctrl = p_slot->ctrl;
43
44 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
45 if (dev) {
46 ctrl_err(ctrl, "Device %s already exists "
47 "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev),
48 pci_domain_nr(parent), p_slot->bus, p_slot->device);
49 pci_dev_put(dev);
50 return -EINVAL;
51 }
52
53 num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
54 if (num == 0) {
55 ctrl_err(ctrl, "No new device found\n");
56 return -ENODEV;
57 }
58
59 for (fn = 0; fn < 8; fn++) {
60 dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn));
61 if (!dev)
62 continue;
63 if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
64 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
65 /* Find an unused bus number for the new bridge */
66 struct pci_bus *child;
67 unsigned char busnr, start = parent->secondary;
68 unsigned char end = parent->subordinate;
69 for (busnr = start; busnr <= end; busnr++) {
70 if (!pci_find_bus(pci_domain_nr(parent),
71 busnr))
72 break;
73 }
74 if (busnr > end) {
75 ctrl_err(ctrl,
76 "No free bus for hot-added bridge\n");
77 pci_dev_put(dev);
78 continue;
79 }
80 child = pci_add_new_bus(parent, dev, busnr);
81 if (!child) {
82 ctrl_err(ctrl, "Cannot add new bus for %s\n",
83 pci_name(dev));
84 pci_dev_put(dev);
85 continue;
86 }
87 child->subordinate = pci_do_scan_bus(child);
88 pci_bus_size_bridges(child);
89 }
90 pci_configure_slot(dev);
91 pci_dev_put(dev);
92 }
93
94 pci_bus_assign_resources(parent);
95 pci_bus_add_devices(parent);
96 pci_enable_bridges(parent);
97 return 0;
98}
99
100int shpchp_unconfigure_device(struct slot *p_slot)
101{
102 int rc = 0;
103 int j;
104 u8 bctl = 0;
105 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
106 struct controller *ctrl = p_slot->ctrl;
107
108 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
109 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
110
111 for (j = 0; j < 8 ; j++) {
112 struct pci_dev *temp = pci_get_slot(parent,
113 (p_slot->device << 3) | j);
114 if (!temp)
115 continue;
116 if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
117 pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
118 if (bctl & PCI_BRIDGE_CTL_VGA) {
119 ctrl_err(ctrl,
120 "Cannot remove display device %s\n",
121 pci_name(temp));
122 pci_dev_put(temp);
123 rc = -EINVAL;
124 break;
125 }
126 }
127 pci_stop_and_remove_bus_device(temp);
128 pci_dev_put(temp);
129 }
130 return rc;
131}
132
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 __ref 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 "
50 "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev),
51 pci_domain_nr(parent), 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 ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
68 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
69 pci_hp_add_bridge(dev);
70 }
71
72 pci_assign_unassigned_bridge_resources(bridge);
73
74 list_for_each_entry(dev, &parent->devices, bus_list) {
75 if (PCI_SLOT(dev->devfn) != p_slot->device)
76 continue;
77 pci_configure_slot(dev);
78 }
79
80 pci_bus_add_devices(parent);
81
82 out:
83 pci_unlock_rescan_remove();
84 return ret;
85}
86
87int shpchp_unconfigure_device(struct slot *p_slot)
88{
89 int rc = 0;
90 u8 bctl = 0;
91 struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
92 struct pci_dev *dev, *temp;
93 struct controller *ctrl = p_slot->ctrl;
94
95 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
96 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
97
98 pci_lock_rescan_remove();
99
100 list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
101 if (PCI_SLOT(dev->devfn) != p_slot->device)
102 continue;
103
104 pci_dev_get(dev);
105 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
106 pci_read_config_byte(dev, PCI_BRIDGE_CONTROL, &bctl);
107 if (bctl & PCI_BRIDGE_CTL_VGA) {
108 ctrl_err(ctrl,
109 "Cannot remove display device %s\n",
110 pci_name(dev));
111 pci_dev_put(dev);
112 rc = -EINVAL;
113 break;
114 }
115 }
116 pci_stop_and_remove_bus_device(dev);
117 pci_dev_put(dev);
118 }
119
120 pci_unlock_rescan_remove();
121 return rc;
122}
123