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 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 } 76 static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL); 77 78 int shpchp_create_ctrl_files(struct controller *ctrl) 79 { 80 return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl); 81 } 82 83 void shpchp_remove_ctrl_files(struct controller *ctrl) 84 { 85 device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl); 86 } 87