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 | |
| 30 | #include <linux/config.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/types.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/workqueue.h> |
| 36 | #include <linux/proc_fs.h> |
| 37 | #include <linux/pci.h> |
| 38 | #include "../pci.h" |
| 39 | #include "pciehp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 42 | int pciehp_configure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | { |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 44 | struct pci_dev *dev; |
| 45 | struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; |
| 46 | int num, fn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 48 | dev = pci_find_slot(p_slot->bus, PCI_DEVFN(p_slot->device, 0)); |
| 49 | if (dev) { |
| 50 | err("Device %s already exists at %x:%x, cannot hot-add\n", |
| 51 | pci_name(dev), p_slot->bus, p_slot->device); |
| 52 | return -EINVAL; |
| 53 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 55 | num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); |
| 56 | if (num == 0) { |
| 57 | err("No new device found\n"); |
| 58 | return -ENODEV; |
| 59 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 61 | for (fn = 0; fn < 8; fn++) { |
| 62 | if (!(dev = pci_find_slot(p_slot->bus, |
| 63 | PCI_DEVFN(p_slot->device, fn)))) |
| 64 | continue; |
| 65 | if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
| 66 | err("Cannot hot-add display device %s\n", |
| 67 | pci_name(dev)); |
| 68 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 70 | if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || |
| 71 | (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) { |
| 72 | /* Find an unused bus number for the new bridge */ |
| 73 | struct pci_bus *child; |
| 74 | unsigned char busnr, start = parent->secondary; |
| 75 | unsigned char end = parent->subordinate; |
| 76 | for (busnr = start; busnr <= end; busnr++) { |
| 77 | if (!pci_find_bus(pci_domain_nr(parent), |
| 78 | busnr)) |
| 79 | break; |
| 80 | } |
| 81 | if (busnr >= end) { |
| 82 | err("No free bus for hot-added bridge\n"); |
| 83 | continue; |
| 84 | } |
| 85 | child = pci_add_new_bus(parent, dev, busnr); |
| 86 | if (!child) { |
| 87 | err("Cannot add new bus for %s\n", |
| 88 | pci_name(dev)); |
| 89 | continue; |
| 90 | } |
| 91 | child->subordinate = pci_do_scan_bus(child); |
| 92 | pci_bus_size_bridges(child); |
| 93 | } |
| 94 | /* TBD: program firmware provided _HPP values */ |
| 95 | /* program_fw_provided_values(dev); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
rajesh.shah@intel.com | 71b720c | 2005-10-31 16:20:06 -0800 | [diff] [blame] | 98 | pci_bus_assign_resources(parent); |
| 99 | pci_bus_add_devices(parent); |
| 100 | pci_enable_bridges(parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | return 0; |
| 102 | } |
| 103 | |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 104 | int pciehp_unconfigure_device(struct slot *p_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
| 106 | int rc = 0; |
| 107 | int j; |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 108 | u8 bctl = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 110 | dbg("%s: bus/dev = %x/%x\n", __FUNCTION__, p_slot->bus, |
| 111 | p_slot->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | for (j=0; j<8 ; j++) { |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 114 | struct pci_dev* temp = pci_find_slot(p_slot->bus, |
| 115 | (p_slot->device << 3) | j); |
| 116 | if (!temp) |
| 117 | continue; |
| 118 | if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) { |
| 119 | err("Cannot remove display device %s\n", |
| 120 | pci_name(temp)); |
| 121 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 123 | if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) { |
| 124 | pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl); |
| 125 | if (bctl & PCI_BRIDGE_CTL_VGA) { |
| 126 | err("Cannot remove display device %s\n", |
| 127 | pci_name(temp)); |
| 128 | continue; |
| 129 | } |
| 130 | } |
| 131 | pci_remove_bus_device(temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | /* |
| 134 | * Some PCI Express root ports require fixup after hot-plug operation. |
| 135 | */ |
| 136 | if (pcie_mch_quirk) |
rajesh.shah@intel.com | ca22a5e | 2005-10-31 16:20:08 -0800 | [diff] [blame^] | 137 | pci_fixup_device(pci_fixup_final, p_slot->ctrl->pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | return rc; |
| 140 | } |
| 141 | |