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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Compaq Hot Plug Controller Driver4 *5 * Copyright (c) 1995,2001 Compaq Computer Corporation6 * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)7 * Copyright (c) 2001 IBM Corp.8 *9 * All rights reserved.10 *11 * Send feedback to <greg@kroah.com>12 *13 */14 15#include <linux/module.h>16#include <linux/kernel.h>17#include <linux/types.h>18#include <linux/pci.h>19#include "shpchp.h"20 21 22/* A few routines that create sysfs entries for the hot plug controller */23 24static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)25{26 struct pci_dev *pdev;27 struct resource *res;28 struct pci_bus *bus;29 size_t len = 0;30 int busnr;31 32 pdev = to_pci_dev(dev);33 bus = pdev->subordinate;34 35 len += sysfs_emit_at(buf, len, "Free resources: memory\n");36 pci_bus_for_each_resource(bus, res) {37 if (res && (res->flags & IORESOURCE_MEM) &&38 !(res->flags & IORESOURCE_PREFETCH)) {39 len += sysfs_emit_at(buf, len,40 "start = %8.8llx, length = %8.8llx\n",41 (unsigned long long)res->start,42 (unsigned long long)resource_size(res));43 }44 }45 len += sysfs_emit_at(buf, len, "Free resources: prefetchable memory\n");46 pci_bus_for_each_resource(bus, res) {47 if (res && (res->flags & IORESOURCE_MEM) &&48 (res->flags & IORESOURCE_PREFETCH)) {49 len += sysfs_emit_at(buf, len,50 "start = %8.8llx, length = %8.8llx\n",51 (unsigned long long)res->start,52 (unsigned long long)resource_size(res));53 }54 }55 len += sysfs_emit_at(buf, len, "Free resources: IO\n");56 pci_bus_for_each_resource(bus, res) {57 if (res && (res->flags & IORESOURCE_IO)) {58 len += sysfs_emit_at(buf, len,59 "start = %8.8llx, length = %8.8llx\n",60 (unsigned long long)res->start,61 (unsigned long long)resource_size(res));62 }63 }64 len += sysfs_emit_at(buf, len, "Free resources: bus numbers\n");65 for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {66 if (!pci_find_bus(pci_domain_nr(bus), busnr))67 break;68 }69 if (busnr < bus->busn_res.end)70 len += sysfs_emit_at(buf, len,71 "start = %8.8x, length = %8.8x\n",72 busnr, (int)(bus->busn_res.end - busnr));73 74 return len;75}76static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);77 78int shpchp_create_ctrl_files(struct controller *ctrl)79{80 return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);81}82 83void shpchp_remove_ctrl_files(struct controller *ctrl)84{85 device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);86}87