blob: 21733108addefe3aefc208dd646ae91340903883 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * PCI Express 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 *
Kristen Accardi8cf4c192005-08-16 15:16:10 -070026 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 *
28 */
29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/pci.h>
34#include "../pci.h"
35#include "pciehp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Sam Ravnborg0ab2b572008-02-17 10:45:28 +010037static int __ref pciehp_add_bridge(struct pci_dev *dev)
Rajesh Shah0eb3bcf2005-12-08 12:12:25 -080038{
39 struct pci_bus *parent = dev->bus;
40 int pass, busnr, start = parent->secondary;
41 int end = parent->subordinate;
42
43 for (busnr = start; busnr <= end; busnr++) {
44 if (!pci_find_bus(pci_domain_nr(parent), busnr))
45 break;
46 }
47 if (busnr-- > end) {
48 err("No bus number available for hot-added bridge %s\n",
49 pci_name(dev));
50 return -1;
51 }
52 for (pass = 0; pass < 2; pass++)
53 busnr = pci_scan_bridge(parent, dev, busnr, pass);
54 if (!dev->subordinate)
55 return -1;
56 pci_bus_size_bridges(dev->subordinate);
57 pci_bus_assign_resources(parent);
58 pci_enable_bridges(parent);
59 pci_bus_add_devices(parent);
60 return 0;
61}
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080063int pciehp_configure_device(struct slot *p_slot)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064{
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080065 struct pci_dev *dev;
Kenji Kaneshige385e2492009-09-15 17:30:14 +090066 struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080067 int num, fn;
Taku Izumi7f2feec2008-09-05 12:11:26 +090068 struct controller *ctrl = p_slot->ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +090070 dev = pci_get_slot(parent, PCI_DEVFN(0, 0));
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080071 if (dev) {
Taku Izumi18b341b2008-10-23 11:47:32 +090072 ctrl_err(ctrl, "Device %s already exists "
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +090073 "at %04x:%02x:00, cannot hot-add\n", pci_name(dev),
74 pci_domain_nr(parent), parent->number);
Kenji Kaneshige56bfada2006-05-12 11:22:24 +090075 pci_dev_put(dev);
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080076 return -EINVAL;
77 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +090079 num = pci_scan_slot(parent, PCI_DEVFN(0, 0));
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080080 if (num == 0) {
Taku Izumi7f2feec2008-09-05 12:11:26 +090081 ctrl_err(ctrl, "No new device found\n");
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080082 return -ENODEV;
83 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080085 for (fn = 0; fn < 8; fn++) {
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +090086 dev = pci_get_slot(parent, PCI_DEVFN(0, fn));
Rajesh Shah0eb3bcf2005-12-08 12:12:25 -080087 if (!dev)
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080088 continue;
89 if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
Taku Izumi7f2feec2008-09-05 12:11:26 +090090 ctrl_err(ctrl, "Cannot hot-add display device %s\n",
91 pci_name(dev));
Kenji Kaneshige6e337062006-05-12 11:23:39 +090092 pci_dev_put(dev);
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080093 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 }
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080095 if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
96 (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
Rajesh Shah0eb3bcf2005-12-08 12:12:25 -080097 pciehp_add_bridge(dev);
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -080098 }
Bjorn Helgaasd569c742009-09-14 16:35:25 -060099 pci_configure_slot(dev);
Kenji Kaneshige6e337062006-05-12 11:23:39 +0900100 pci_dev_put(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 }
102
rajesh.shah@intel.com71b720c2005-10-31 16:20:06 -0800103 pci_bus_assign_resources(parent);
104 pci_bus_add_devices(parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 return 0;
106}
107
rajesh.shah@intel.comca22a5e2005-10-31 16:20:08 -0800108int pciehp_unconfigure_device(struct slot *p_slot)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
Kristen Carlson Accardi1cf53d52007-08-09 16:09:31 -0700110 int ret, rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 int j;
rajesh.shah@intel.comca22a5e2005-10-31 16:20:08 -0800112 u8 bctl = 0;
Kristen Carlson Accardi1cf53d52007-08-09 16:09:31 -0700113 u8 presence = 0;
Kenji Kaneshige385e2492009-09-15 17:30:14 +0900114 struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate;
Kenji Kaneshige2326e2b2007-12-20 19:46:33 +0900115 u16 command;
Taku Izumi7f2feec2008-09-05 12:11:26 +0900116 struct controller *ctrl = p_slot->ctrl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +0900118 ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n",
119 __func__, pci_domain_nr(parent), parent->number);
Kenji Kaneshige82a9e792009-09-15 17:30:48 +0900120 ret = pciehp_get_adapter_status(p_slot, &presence);
Kenji Kaneshige2326e2b2007-12-20 19:46:33 +0900121 if (ret)
122 presence = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Rolf Eike Beerf07234b2007-11-06 13:20:17 +0100124 for (j = 0; j < 8; j++) {
Kenji Kaneshiged689f7e2009-09-15 17:26:56 +0900125 struct pci_dev* temp = pci_get_slot(parent, PCI_DEVFN(0, j));
rajesh.shah@intel.comca22a5e2005-10-31 16:20:08 -0800126 if (!temp)
127 continue;
128 if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
Taku Izumi7f2feec2008-09-05 12:11:26 +0900129 ctrl_err(ctrl, "Cannot remove display device %s\n",
130 pci_name(temp));
Kenji Kaneshige56bfada2006-05-12 11:22:24 +0900131 pci_dev_put(temp);
rajesh.shah@intel.comca22a5e2005-10-31 16:20:08 -0800132 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 }
Kenji Kaneshige2326e2b2007-12-20 19:46:33 +0900134 if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE && presence) {
135 pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
136 if (bctl & PCI_BRIDGE_CTL_VGA) {
Taku Izumi7f2feec2008-09-05 12:11:26 +0900137 ctrl_err(ctrl,
138 "Cannot remove display device %s\n",
139 pci_name(temp));
Kenji Kaneshige2326e2b2007-12-20 19:46:33 +0900140 pci_dev_put(temp);
141 continue;
rajesh.shah@intel.comca22a5e2005-10-31 16:20:08 -0800142 }
143 }
144 pci_remove_bus_device(temp);
Kenji Kaneshige2326e2b2007-12-20 19:46:33 +0900145 /*
146 * Ensure that no new Requests will be generated from
147 * the device.
148 */
149 if (presence) {
150 pci_read_config_word(temp, PCI_COMMAND, &command);
151 command &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
152 command |= PCI_COMMAND_INTX_DISABLE;
153 pci_write_config_word(temp, PCI_COMMAND, command);
154 }
Kenji Kaneshige56bfada2006-05-12 11:22:24 +0900155 pci_dev_put(temp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 }
Kenji Kaneshige9fe81642007-08-09 16:09:37 -0700157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 return rc;
159}