tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
24static 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}
72static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);
73
74int shpchp_create_ctrl_files(struct controller *ctrl)
75{
76 return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
77}
78
79void shpchp_remove_ctrl_files(struct controller *ctrl)
80{
81 device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
82}