PCI: drivers/pci/slot.c should depend on CONFIG_SYSFS
[linux-2.6.git] / drivers / pci / hotplug / shpchp_sysfs.c
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
38 static 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         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
51                 res = bus->resource[index];
52                 if (res && (res->flags & IORESOURCE_MEM) &&
53                                 !(res->flags & IORESOURCE_PREFETCH)) {
54                         out += sprintf(out, "start = %8.8llx, "
55                                         "length = %8.8llx\n",
56                                         (unsigned long long)res->start,
57                                         (unsigned long long)(res->end - res->start));
58                 }
59         }
60         out += sprintf(out, "Free resources: prefetchable memory\n");
61         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
62                 res = bus->resource[index];
63                 if (res && (res->flags & IORESOURCE_MEM) &&
64                                (res->flags & IORESOURCE_PREFETCH)) {
65                         out += sprintf(out, "start = %8.8llx, "
66                                         "length = %8.8llx\n",
67                                         (unsigned long long)res->start,
68                                         (unsigned long long)(res->end - res->start));
69                 }
70         }
71         out += sprintf(out, "Free resources: IO\n");
72         for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
73                 res = bus->resource[index];
74                 if (res && (res->flags & IORESOURCE_IO)) {
75                         out += sprintf(out, "start = %8.8llx, "
76                                         "length = %8.8llx\n",
77                                         (unsigned long long)res->start,
78                                         (unsigned long long)(res->end - res->start));
79                 }
80         }
81         out += sprintf(out, "Free resources: bus numbers\n");
82         for (busnr = bus->secondary; busnr <= bus->subordinate; busnr++) {
83                 if (!pci_find_bus(pci_domain_nr(bus), busnr))
84                         break;
85         }
86         if (busnr < bus->subordinate)
87                 out += sprintf(out, "start = %8.8x, length = %8.8x\n",
88                                 busnr, (bus->subordinate - busnr));
89
90         return out - buf;
91 }
92 static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
93
94 int __must_check shpchp_create_ctrl_files (struct controller *ctrl)
95 {
96         return device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
97 }
98
99 void shpchp_remove_ctrl_files(struct controller *ctrl)
100 {
101         device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
102 }