Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 Accardi | 8cf4c19 | 2005-08-16 15:16:10 -0700 | [diff] [blame] | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * |
| 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/pci.h> |
| 34 | #include "../pci.h" |
| 35 | #include "pciehp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
Sam Ravnborg | 0ab2b57 | 2008-02-17 10:45:28 +0100 | [diff] [blame] | 37 | static int __ref pciehp_add_bridge(struct pci_dev *dev) |
Rajesh Shah | 0eb3bcf | 2005-12-08 12:12:25 -0800 | [diff] [blame] | 38 | { |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 63 | int pciehp_configure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 65 | struct pci_dev *dev; |
Kenji Kaneshige | 385e249 | 2009-09-15 17:30:14 +0900 | [diff] [blame] | 66 | struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate; |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 67 | int num, fn; |
Taku Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 68 | struct controller *ctrl = p_slot->ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 70 | dev = pci_get_slot(parent, PCI_DEVFN(0, 0)); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 71 | if (dev) { |
Taku Izumi | 18b341b | 2008-10-23 11:47:32 +0900 | [diff] [blame] | 72 | ctrl_err(ctrl, "Device %s already exists " |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 73 | "at %04x:%02x:00, cannot hot-add\n", pci_name(dev), |
| 74 | pci_domain_nr(parent), parent->number); |
Kenji Kaneshige | 56bfada | 2006-05-12 11:22:24 +0900 | [diff] [blame] | 75 | pci_dev_put(dev); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 76 | return -EINVAL; |
| 77 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 79 | num = pci_scan_slot(parent, PCI_DEVFN(0, 0)); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 80 | if (num == 0) { |
Taku Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 81 | ctrl_err(ctrl, "No new device found\n"); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 82 | return -ENODEV; |
| 83 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 85 | for (fn = 0; fn < 8; fn++) { |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 86 | dev = pci_get_slot(parent, PCI_DEVFN(0, fn)); |
Rajesh Shah | 0eb3bcf | 2005-12-08 12:12:25 -0800 | [diff] [blame] | 87 | if (!dev) |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 88 | continue; |
| 89 | if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
Taku Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 90 | ctrl_err(ctrl, "Cannot hot-add display device %s\n", |
| 91 | pci_name(dev)); |
Kenji Kaneshige | 6e33706 | 2006-05-12 11:23:39 +0900 | [diff] [blame] | 92 | pci_dev_put(dev); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 93 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 95 | if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || |
| 96 | (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) { |
Rajesh Shah | 0eb3bcf | 2005-12-08 12:12:25 -0800 | [diff] [blame] | 97 | pciehp_add_bridge(dev); |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 98 | } |
Bjorn Helgaas | d569c74 | 2009-09-14 16:35:25 -0600 | [diff] [blame] | 99 | pci_configure_slot(dev); |
Kenji Kaneshige | 6e33706 | 2006-05-12 11:23:39 +0900 | [diff] [blame] | 100 | pci_dev_put(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 103 | pci_bus_assign_resources(parent); |
| 104 | pci_bus_add_devices(parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame] | 108 | int pciehp_unconfigure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
Kristen Carlson Accardi | 1cf53d5 | 2007-08-09 16:09:31 -0700 | [diff] [blame] | 110 | int ret, rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | int j; |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame] | 112 | u8 bctl = 0; |
Kristen Carlson Accardi | 1cf53d5 | 2007-08-09 16:09:31 -0700 | [diff] [blame] | 113 | u8 presence = 0; |
Kenji Kaneshige | 385e249 | 2009-09-15 17:30:14 +0900 | [diff] [blame] | 114 | struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate; |
Kenji Kaneshige | 2326e2b | 2007-12-20 19:46:33 +0900 | [diff] [blame] | 115 | u16 command; |
Taku Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 116 | struct controller *ctrl = p_slot->ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 118 | ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n", |
| 119 | __func__, pci_domain_nr(parent), parent->number); |
Kenji Kaneshige | 82a9e79 | 2009-09-15 17:30:48 +0900 | [diff] [blame^] | 120 | ret = pciehp_get_adapter_status(p_slot, &presence); |
Kenji Kaneshige | 2326e2b | 2007-12-20 19:46:33 +0900 | [diff] [blame] | 121 | if (ret) |
| 122 | presence = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Rolf Eike Beer | f07234b | 2007-11-06 13:20:17 +0100 | [diff] [blame] | 124 | for (j = 0; j < 8; j++) { |
Kenji Kaneshige | d689f7e | 2009-09-15 17:26:56 +0900 | [diff] [blame] | 125 | struct pci_dev* temp = pci_get_slot(parent, PCI_DEVFN(0, j)); |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame] | 126 | if (!temp) |
| 127 | continue; |
| 128 | if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
Taku Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 129 | ctrl_err(ctrl, "Cannot remove display device %s\n", |
| 130 | pci_name(temp)); |
Kenji Kaneshige | 56bfada | 2006-05-12 11:22:24 +0900 | [diff] [blame] | 131 | pci_dev_put(temp); |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame] | 132 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
Kenji Kaneshige | 2326e2b | 2007-12-20 19:46:33 +0900 | [diff] [blame] | 134 | 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 Izumi | 7f2feec | 2008-09-05 12:11:26 +0900 | [diff] [blame] | 137 | ctrl_err(ctrl, |
| 138 | "Cannot remove display device %s\n", |
| 139 | pci_name(temp)); |
Kenji Kaneshige | 2326e2b | 2007-12-20 19:46:33 +0900 | [diff] [blame] | 140 | pci_dev_put(temp); |
| 141 | continue; |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame] | 142 | } |
| 143 | } |
| 144 | pci_remove_bus_device(temp); |
Kenji Kaneshige | 2326e2b | 2007-12-20 19:46:33 +0900 | [diff] [blame] | 145 | /* |
| 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 Kaneshige | 56bfada | 2006-05-12 11:22:24 +0900 | [diff] [blame] | 155 | pci_dev_put(temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
Kenji Kaneshige | 9fe8164 | 2007-08-09 16:09:37 -0700 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | return rc; |
| 159 | } |