1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Compaq Hot Plug Controller Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 1995,2001 Compaq Computer Corporation
6*4882a593Smuzhiyun * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
7*4882a593Smuzhiyun * Copyright (c) 2001 IBM Corp.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * All rights reserved.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * Send feedback to <greg@kroah.com>
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <linux/module.h>
16*4882a593Smuzhiyun #include <linux/kernel.h>
17*4882a593Smuzhiyun #include <linux/types.h>
18*4882a593Smuzhiyun #include <linux/pci.h>
19*4882a593Smuzhiyun #include "shpchp.h"
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /* A few routines that create sysfs entries for the hot plug controller */
23*4882a593Smuzhiyun
show_ctrl(struct device * dev,struct device_attribute * attr,char * buf)24*4882a593Smuzhiyun static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun struct pci_dev *pdev;
27*4882a593Smuzhiyun char *out = buf;
28*4882a593Smuzhiyun int index, busnr;
29*4882a593Smuzhiyun struct resource *res;
30*4882a593Smuzhiyun struct pci_bus *bus;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun pdev = to_pci_dev(dev);
33*4882a593Smuzhiyun bus = pdev->subordinate;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun out += sprintf(buf, "Free resources: memory\n");
36*4882a593Smuzhiyun pci_bus_for_each_resource(bus, res, index) {
37*4882a593Smuzhiyun if (res && (res->flags & IORESOURCE_MEM) &&
38*4882a593Smuzhiyun !(res->flags & IORESOURCE_PREFETCH)) {
39*4882a593Smuzhiyun out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
40*4882a593Smuzhiyun (unsigned long long)res->start,
41*4882a593Smuzhiyun (unsigned long long)resource_size(res));
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun out += sprintf(out, "Free resources: prefetchable memory\n");
45*4882a593Smuzhiyun pci_bus_for_each_resource(bus, res, index) {
46*4882a593Smuzhiyun if (res && (res->flags & IORESOURCE_MEM) &&
47*4882a593Smuzhiyun (res->flags & IORESOURCE_PREFETCH)) {
48*4882a593Smuzhiyun out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
49*4882a593Smuzhiyun (unsigned long long)res->start,
50*4882a593Smuzhiyun (unsigned long long)resource_size(res));
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun out += sprintf(out, "Free resources: IO\n");
54*4882a593Smuzhiyun pci_bus_for_each_resource(bus, res, index) {
55*4882a593Smuzhiyun if (res && (res->flags & IORESOURCE_IO)) {
56*4882a593Smuzhiyun out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
57*4882a593Smuzhiyun (unsigned long long)res->start,
58*4882a593Smuzhiyun (unsigned long long)resource_size(res));
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun out += sprintf(out, "Free resources: bus numbers\n");
62*4882a593Smuzhiyun for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
63*4882a593Smuzhiyun if (!pci_find_bus(pci_domain_nr(bus), busnr))
64*4882a593Smuzhiyun break;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun if (busnr < bus->busn_res.end)
67*4882a593Smuzhiyun out += sprintf(out, "start = %8.8x, length = %8.8x\n",
68*4882a593Smuzhiyun busnr, (int)(bus->busn_res.end - busnr));
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return out - buf;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);
73*4882a593Smuzhiyun
shpchp_create_ctrl_files(struct controller * ctrl)74*4882a593Smuzhiyun int shpchp_create_ctrl_files(struct controller *ctrl)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
shpchp_remove_ctrl_files(struct controller * ctrl)79*4882a593Smuzhiyun void shpchp_remove_ctrl_files(struct controller *ctrl)
80*4882a593Smuzhiyun {
81*4882a593Smuzhiyun device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
82*4882a593Smuzhiyun }
83