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, at: len, fmt: "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, at: len, |
40 | fmt: "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, at: len, fmt: "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, at: len, |
50 | fmt: "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, at: len, fmt: "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, at: len, |
59 | fmt: "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, at: len, fmt: "Free resources: bus numbers\n" ); |
65 | for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) { |
66 | if (!pci_find_bus(domain: pci_domain_nr(bus), busnr)) |
67 | break; |
68 | } |
69 | if (busnr < bus->busn_res.end) |
70 | len += sysfs_emit_at(buf, at: len, |
71 | fmt: "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(device: &ctrl->pci_dev->dev, entry: &dev_attr_ctrl); |
81 | } |
82 | |
83 | void shpchp_remove_ctrl_files(struct controller *ctrl) |
84 | { |
85 | device_remove_file(dev: &ctrl->pci_dev->dev, attr: &dev_attr_ctrl); |
86 | } |
87 | |