/* * Standard Hot Plug Controller Driver * * Copyright (C) 1995,2001 Compaq Computer Corporation * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) * Copyright (C) 2001 IBM Corp. * Copyright (C) 2003-2004 Intel Corporation * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> * */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/pci.h> #include "../pci.h" #include "shpchp.h" int __ref shpchp_configure_device(struct slot *p_slot) { struct pci_dev *dev; struct controller *ctrl = p_slot->ctrl; struct pci_dev *bridge = ctrl->pci_dev; struct pci_bus *parent = bridge->subordinate; int num, fn; dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0)); if (dev) { ctrl_err(ctrl, "Device %s already exists " "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev), pci_domain_nr(parent), p_slot->bus, p_slot->device); pci_dev_put(dev); return -EINVAL; } num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0)); if (num == 0) { ctrl_err(ctrl, "No new device found\n"); return -ENODEV; } for (fn = 0; fn < 8; fn++) { dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); if (!dev) continue; if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) || (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) pci_hp_add_bridge(dev); pci_dev_put(dev); } pci_assign_unassigned_bridge_resources(bridge); for (fn = 0; fn < 8; fn++) { dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn)); if (!dev) continue; pci_configure_slot(dev); pci_dev_put(dev); } pci_bus_add_devices(parent); return 0; } int shpchp_unconfigure_device(struct slot *p_slot) { int rc = 0; int j; u8 bctl = 0; struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate; struct controller *ctrl = p_slot->ctrl; ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n", __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device); for (j = 0; j < 8 ; j++) { struct pci_dev *temp = pci_get_slot(parent, (p_slot->device << 3) | j); if (!temp) continue; if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) { pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl); if (bctl & PCI_BRIDGE_CTL_VGA) { ctrl_err(ctrl, "Cannot remove display device %s\n", pci_name(temp)); pci_dev_put(temp); rc = -EINVAL; break; } } pci_stop_and_remove_bus_device(temp); pci_dev_put(temp); } return rc; }