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1da177e4 LT |
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 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
1da177e4 LT |
33 | #include <linux/pci.h> |
34 | #include "../pci.h" | |
35 | #include "shpchp.h" | |
1da177e4 | 36 | |
0ab2b57f | 37 | int __ref shpchp_configure_device(struct slot *p_slot) |
1da177e4 | 38 | { |
dbd7a788 | 39 | struct pci_dev *dev; |
40 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; | |
41 | int num, fn; | |
f98ca311 | 42 | struct controller *ctrl = p_slot->ctrl; |
dbd7a788 | 43 | |
e00e57ef | 44 | dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
dbd7a788 | 45 | if (dev) { |
be7bce25 TI |
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); | |
e00e57ef | 49 | pci_dev_put(dev); |
dbd7a788 | 50 | return -EINVAL; |
1da177e4 LT |
51 | } |
52 | ||
dbd7a788 | 53 | num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
54 | if (num == 0) { | |
f98ca311 | 55 | ctrl_err(ctrl, "No new device found\n"); |
dbd7a788 | 56 | return -ENODEV; |
57 | } | |
1da177e4 | 58 | |
dbd7a788 | 59 | for (fn = 0; fn < 8; fn++) { |
e00e57ef KK |
60 | dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); |
61 | if (!dev) | |
dbd7a788 | 62 | continue; |
dbd7a788 | 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 | } | |
35e1801e | 74 | if (busnr > end) { |
f98ca311 TI |
75 | ctrl_err(ctrl, |
76 | "No free bus for hot-added bridge\n"); | |
e00e57ef | 77 | pci_dev_put(dev); |
dbd7a788 | 78 | continue; |
79 | } | |
80 | child = pci_add_new_bus(parent, dev, busnr); | |
81 | if (!child) { | |
f98ca311 TI |
82 | ctrl_err(ctrl, "Cannot add new bus for %s\n", |
83 | pci_name(dev)); | |
e00e57ef | 84 | pci_dev_put(dev); |
dbd7a788 | 85 | continue; |
86 | } | |
87 | child->subordinate = pci_do_scan_bus(child); | |
88 | pci_bus_size_bridges(child); | |
89 | } | |
11876e52 | 90 | pci_configure_slot(dev); |
e00e57ef | 91 | pci_dev_put(dev); |
1da177e4 LT |
92 | } |
93 | ||
dbd7a788 | 94 | pci_bus_assign_resources(parent); |
95 | pci_bus_add_devices(parent); | |
96 | pci_enable_bridges(parent); | |
1da177e4 LT |
97 | return 0; |
98 | } | |
99 | ||
2178bfad | 100 | int shpchp_unconfigure_device(struct slot *p_slot) |
1da177e4 LT |
101 | { |
102 | int rc = 0; | |
103 | int j; | |
2178bfad | 104 | u8 bctl = 0; |
e00e57ef | 105 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; |
f98ca311 | 106 | struct controller *ctrl = p_slot->ctrl; |
e00e57ef | 107 | |
be7bce25 TI |
108 | ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n", |
109 | __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device); | |
1da177e4 | 110 | |
0ba10bc7 PK |
111 | for (j = 0; j < 8 ; j++) { |
112 | struct pci_dev *temp = pci_get_slot(parent, | |
2178bfad | 113 | (p_slot->device << 3) | j); |
114 | if (!temp) | |
115 | continue; | |
2178bfad | 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) { | |
f98ca311 TI |
119 | ctrl_err(ctrl, |
120 | "Cannot remove display device %s\n", | |
121 | pci_name(temp)); | |
e00e57ef | 122 | pci_dev_put(temp); |
0ba10bc7 PK |
123 | rc = -EINVAL; |
124 | break; | |
2178bfad | 125 | } |
1da177e4 | 126 | } |
2178bfad | 127 | pci_remove_bus_device(temp); |
e00e57ef | 128 | pci_dev_put(temp); |
1da177e4 LT |
129 | } |
130 | return rc; | |
131 | } | |
132 |