1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Compaq Hot Plug Controller Driver 4 * 5 * Copyright (c) 1995,2001 Compaq Computer Corporation 6 * 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 24 static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf) 25 { 26 struct pci_dev *pdev; 27 char *out = buf; 28 int index, busnr; 29 struct resource *res; 30 struct pci_bus *bus; 31 32 pdev = to_pci_dev(dev); 33 bus = pdev->subordinate; 34 35 out += sprintf(buf, "Free resources: memory\n"); 36 pci_bus_for_each_resource(bus, res, index) { 37 if (res && (res->flags & IORESOURCE_MEM) && 38 !(res->flags & IORESOURCE_PREFETCH)) { 39 out += sprintf(out, "start = %8.8llx, length = %8.8llx\n", 40 (unsigned long long)res->start, 41 (unsigned long long)resource_size(res)); 42 } 43 } 44 out += sprintf(out, "Free resources: prefetchable memory\n"); 45 pci_bus_for_each_resource(bus, res, index) { 46 if (res && (res->flags & IORESOURCE_MEM) && 47 (res->flags & IORESOURCE_PREFETCH)) { 48 out += sprintf(out, "start = %8.8llx, length = %8.8llx\n", 49 (unsigned long long)res->start, 50 (unsigned long long)resource_size(res)); 51 } 52 } 53 out += sprintf(out, "Free resources: IO\n"); 54 pci_bus_for_each_resource(bus, res, index) { 55 if (res && (res->flags & IORESOURCE_IO)) { 56 out += sprintf(out, "start = %8.8llx, length = %8.8llx\n", 57 (unsigned long long)res->start, 58 (unsigned long long)resource_size(res)); 59 } 60 } 61 out += sprintf(out, "Free resources: bus numbers\n"); 62 for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) { 63 if (!pci_find_bus(pci_domain_nr(bus), busnr)) 64 break; 65 } 66 if (busnr < bus->busn_res.end) 67 out += sprintf(out, "start = %8.8x, length = %8.8x\n", 68 busnr, (int)(bus->busn_res.end - busnr)); 69 70 return out - buf; 71 } 72 static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL); 73 74 int shpchp_create_ctrl_files(struct controller *ctrl) 75 { 76 return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl); 77 } 78 79 void shpchp_remove_ctrl_files(struct controller *ctrl) 80 { 81 device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl); 82 } 83