tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Compaq Hot Plug Controller Driver
3 *
4 * Copyright (c) 1995,2001 Compaq Computer Corporation
5 * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (c) 2001 IBM Corp.
7 *
8 * All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18 * NON INFRINGEMENT. See the GNU General Public License for more
19 * details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * Send feedback to <greg@kroah.com>
26 *
27 */
28
29#include <linux/module.h>
30#include <linux/kernel.h>
31#include <linux/types.h>
32#include <linux/pci.h>
33#include "shpchp.h"
34
35
36/* A few routines that create sysfs entries for the hot plug controller */
37
38static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf)
39{
40 struct pci_dev *pdev;
41 char * out = buf;
42 int index, busnr;
43 struct resource *res;
44 struct pci_bus *bus;
45
46 pdev = container_of (dev, struct pci_dev, dev);
47 bus = pdev->subordinate;
48
49 out += sprintf(buf, "Free resources: memory\n");
50 pci_bus_for_each_resource(bus, res, index) {
51 if (res && (res->flags & IORESOURCE_MEM) &&
52 !(res->flags & IORESOURCE_PREFETCH)) {
53 out += sprintf(out, "start = %8.8llx, "
54 "length = %8.8llx\n",
55 (unsigned long long)res->start,
56 (unsigned long long)(res->end - res->start));
57 }
58 }
59 out += sprintf(out, "Free resources: prefetchable memory\n");
60 pci_bus_for_each_resource(bus, res, index) {
61 if (res && (res->flags & IORESOURCE_MEM) &&
62 (res->flags & IORESOURCE_PREFETCH)) {
63 out += sprintf(out, "start = %8.8llx, "
64 "length = %8.8llx\n",
65 (unsigned long long)res->start,
66 (unsigned long long)(res->end - res->start));
67 }
68 }
69 out += sprintf(out, "Free resources: IO\n");
70 pci_bus_for_each_resource(bus, res, index) {
71 if (res && (res->flags & IORESOURCE_IO)) {
72 out += sprintf(out, "start = %8.8llx, "
73 "length = %8.8llx\n",
74 (unsigned long long)res->start,
75 (unsigned long long)(res->end - res->start));
76 }
77 }
78 out += sprintf(out, "Free resources: bus numbers\n");
79 for (busnr = bus->secondary; busnr <= bus->subordinate; busnr++) {
80 if (!pci_find_bus(pci_domain_nr(bus), busnr))
81 break;
82 }
83 if (busnr < bus->subordinate)
84 out += sprintf(out, "start = %8.8x, length = %8.8x\n",
85 busnr, (bus->subordinate - busnr));
86
87 return out - buf;
88}
89static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
90
91int __must_check shpchp_create_ctrl_files (struct controller *ctrl)
92{
93 return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
94}
95
96void shpchp_remove_ctrl_files(struct controller *ctrl)
97{
98 device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
99}