48b1914873
This patch contains the following cleanups: - access.c should #include "pci.h" for getting the prototypes of it's global functions - hotplug/shpchp_pci.c: make the needlessly global function program_fw_provided_values() static Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
178 lines
4.9 KiB
C
178 lines
4.9 KiB
C
/*
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* Standard Hot Plug Controller Driver
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*
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* Copyright (C) 1995,2001 Compaq Computer Corporation
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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* Copyright (C) 2003-2004 Intel Corporation
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include "../pci.h"
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#include "shpchp.h"
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static void program_fw_provided_values(struct pci_dev *dev)
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{
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u16 pci_cmd, pci_bctl;
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struct pci_dev *cdev;
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struct hotplug_params hpp = {0x8, 0x40, 0, 0}; /* defaults */
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/* Program hpp values for this device */
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if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL ||
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(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
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(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)))
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return;
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get_hp_params_from_firmware(dev, &hpp);
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pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, hpp.cache_line_size);
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, hpp.latency_timer);
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pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
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if (hpp.enable_serr)
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pci_cmd |= PCI_COMMAND_SERR;
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else
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pci_cmd &= ~PCI_COMMAND_SERR;
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if (hpp.enable_perr)
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pci_cmd |= PCI_COMMAND_PARITY;
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else
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pci_cmd &= ~PCI_COMMAND_PARITY;
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pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
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/* Program bridge control value and child devices */
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if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
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pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER,
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hpp.latency_timer);
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pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl);
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if (hpp.enable_serr)
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pci_bctl |= PCI_BRIDGE_CTL_SERR;
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else
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pci_bctl &= ~PCI_BRIDGE_CTL_SERR;
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if (hpp.enable_perr)
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pci_bctl |= PCI_BRIDGE_CTL_PARITY;
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else
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pci_bctl &= ~PCI_BRIDGE_CTL_PARITY;
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pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl);
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if (dev->subordinate) {
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list_for_each_entry(cdev, &dev->subordinate->devices,
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bus_list)
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program_fw_provided_values(cdev);
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}
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}
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}
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int shpchp_configure_device(struct slot *p_slot)
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{
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struct pci_dev *dev;
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struct pci_bus *parent = p_slot->ctrl->pci_dev->subordinate;
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int num, fn;
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dev = pci_find_slot(p_slot->bus, PCI_DEVFN(p_slot->device, 0));
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if (dev) {
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err("Device %s already exists at %x:%x, cannot hot-add\n",
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pci_name(dev), p_slot->bus, p_slot->device);
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return -EINVAL;
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}
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num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
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if (num == 0) {
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err("No new device found\n");
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return -ENODEV;
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}
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for (fn = 0; fn < 8; fn++) {
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if (!(dev = pci_find_slot(p_slot->bus,
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PCI_DEVFN(p_slot->device, fn))))
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continue;
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if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
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err("Cannot hot-add display device %s\n",
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pci_name(dev));
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continue;
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}
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if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
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(dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
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/* Find an unused bus number for the new bridge */
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struct pci_bus *child;
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unsigned char busnr, start = parent->secondary;
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unsigned char end = parent->subordinate;
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for (busnr = start; busnr <= end; busnr++) {
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if (!pci_find_bus(pci_domain_nr(parent),
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busnr))
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break;
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}
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if (busnr >= end) {
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err("No free bus for hot-added bridge\n");
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continue;
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}
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child = pci_add_new_bus(parent, dev, busnr);
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if (!child) {
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err("Cannot add new bus for %s\n",
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pci_name(dev));
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continue;
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}
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child->subordinate = pci_do_scan_bus(child);
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pci_bus_size_bridges(child);
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}
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program_fw_provided_values(dev);
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}
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pci_bus_assign_resources(parent);
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pci_bus_add_devices(parent);
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pci_enable_bridges(parent);
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return 0;
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}
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int shpchp_unconfigure_device(struct slot *p_slot)
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{
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int rc = 0;
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int j;
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u8 bctl = 0;
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dbg("%s: bus/dev = %x/%x\n", __FUNCTION__, p_slot->bus, p_slot->device);
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for (j=0; j<8 ; j++) {
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struct pci_dev* temp = pci_find_slot(p_slot->bus,
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(p_slot->device << 3) | j);
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if (!temp)
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continue;
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if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
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err("Cannot remove display device %s\n",
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pci_name(temp));
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continue;
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}
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if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
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pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
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if (bctl & PCI_BRIDGE_CTL_VGA) {
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err("Cannot remove display device %s\n",
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pci_name(temp));
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continue;
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}
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}
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pci_remove_bus_device(temp);
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}
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return rc;
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}
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