cpqphp_sysfs.c (a8b3e6f10f08f66ae1072efd087b30966a3654f6) cpqphp_sysfs.c (9f3f4681291fc88864bb27f8f3832b95bb53aae5)
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.

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28
29#include <linux/config.h>
30#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
33#include <linux/proc_fs.h>
34#include <linux/workqueue.h>
35#include <linux/pci.h>
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.

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28
29#include <linux/config.h>
30#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/types.h>
33#include <linux/proc_fs.h>
34#include <linux/workqueue.h>
35#include <linux/pci.h>
36#include <linux/debugfs.h>
36#include "cpqphp.h"
37
37#include "cpqphp.h"
38
38
39/* A few routines that create sysfs entries for the hot plug controller */
40
41static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, char *buf)
39static int show_ctrl (struct controller *ctrl, char *buf)
42{
40{
43 struct pci_dev *pci_dev;
44 struct controller *ctrl;
45 char * out = buf;
41 char *out = buf;
46 int index;
47 struct pci_resource *res;
48
42 int index;
43 struct pci_resource *res;
44
49 pci_dev = container_of (dev, struct pci_dev, dev);
50 ctrl = pci_get_drvdata(pci_dev);
51
52 out += sprintf(buf, "Free resources: memory\n");
53 index = 11;
54 res = ctrl->mem_head;
55 while (res && index--) {
56 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
57 res = res->next;
58 }
59 out += sprintf(out, "Free resources: prefetchable memory\n");

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75 res = ctrl->bus_head;
76 while (res && index--) {
77 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
78 res = res->next;
79 }
80
81 return out - buf;
82}
45 out += sprintf(buf, "Free resources: memory\n");
46 index = 11;
47 res = ctrl->mem_head;
48 while (res && index--) {
49 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
50 res = res->next;
51 }
52 out += sprintf(out, "Free resources: prefetchable memory\n");

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68 res = ctrl->bus_head;
69 while (res && index--) {
70 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
71 res = res->next;
72 }
73
74 return out - buf;
75}
83static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
84
76
85static ssize_t show_dev (struct device *dev, struct device_attribute *attr, char *buf)
77static int show_dev (struct controller *ctrl, char *buf)
86{
78{
87 struct pci_dev *pci_dev;
88 struct controller *ctrl;
89 char * out = buf;
90 int index;
91 struct pci_resource *res;
92 struct pci_func *new_slot;
93 struct slot *slot;
94
79 char * out = buf;
80 int index;
81 struct pci_resource *res;
82 struct pci_func *new_slot;
83 struct slot *slot;
84
95 pci_dev = container_of (dev, struct pci_dev, dev);
96 ctrl = pci_get_drvdata(pci_dev);
85 slot = ctrl->slot;
97
86
98 slot=ctrl->slot;
99
100 while (slot) {
101 new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
102 if (!new_slot)
103 break;
104 out += sprintf(out, "assigned resources: memory\n");
105 index = 11;
106 res = new_slot->mem_head;
107 while (res && index--) {

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129 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
130 res = res->next;
131 }
132 slot=slot->next;
133 }
134
135 return out - buf;
136}
87 while (slot) {
88 new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
89 if (!new_slot)
90 break;
91 out += sprintf(out, "assigned resources: memory\n");
92 index = 11;
93 res = new_slot->mem_head;
94 while (res && index--) {

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116 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
117 res = res->next;
118 }
119 slot=slot->next;
120 }
121
122 return out - buf;
123}
137static DEVICE_ATTR (dev, S_IRUGO, show_dev, NULL);
138
124
139void cpqhp_create_ctrl_files (struct controller *ctrl)
125static int spew_debug_info(struct controller *ctrl, char *data, int size)
140{
126{
141 device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
142 device_create_file (&ctrl->pci_dev->dev, &dev_attr_dev);
127 int used;
128
129 used = size - show_ctrl(ctrl, data);
130 used = (size - used) - show_dev(ctrl, &data[used]);
131 return used;
143}
132}
133
134struct ctrl_dbg {
135 int size;
136 char *data;
137 struct controller *ctrl;
138};
139
140#define MAX_OUTPUT (4*PAGE_SIZE)
141
142static int open(struct inode *inode, struct file *file)
143{
144 struct controller *ctrl = inode->u.generic_ip;
145 struct ctrl_dbg *dbg;
146 int retval = -ENOMEM;
147
148 lock_kernel();
149 dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
150 if (!dbg)
151 goto exit;
152 dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
153 if (!dbg->data) {
154 kfree(dbg);
155 goto exit;
156 }
157 dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
158 file->private_data = dbg;
159 retval = 0;
160exit:
161 unlock_kernel();
162 return retval;
163}
164
165static loff_t lseek(struct file *file, loff_t off, int whence)
166{
167 struct ctrl_dbg *dbg;
168 loff_t new = -1;
169
170 lock_kernel();
171 dbg = file->private_data;
172
173 switch (whence) {
174 case 0:
175 new = off;
176 break;
177 case 1:
178 new = file->f_pos + off;
179 break;
180 }
181 if (new < 0 || new > dbg->size) {
182 unlock_kernel();
183 return -EINVAL;
184 }
185 unlock_kernel();
186 return (file->f_pos = new);
187}
188
189static ssize_t read(struct file *file, char __user *buf,
190 size_t nbytes, loff_t *ppos)
191{
192 struct ctrl_dbg *dbg = file->private_data;
193 return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
194}
195
196static int release(struct inode *inode, struct file *file)
197{
198 struct ctrl_dbg *dbg = file->private_data;
199
200 kfree(dbg->data);
201 kfree(dbg);
202 return 0;
203}
204
205static struct file_operations debug_ops = {
206 .owner = THIS_MODULE,
207 .open = open,
208 .llseek = lseek,
209 .read = read,
210 .release = release,
211};
212
213static struct dentry *root;
214
215void cpqhp_initialize_debugfs(void)
216{
217 if (!root)
218 root = debugfs_create_dir("cpqhp", NULL);
219}
220
221void cpqhp_shutdown_debugfs(void)
222{
223 debugfs_remove(root);
224}
225
226void cpqhp_create_debugfs_files(struct controller *ctrl)
227{
228 ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
229}
230
231void cpqhp_remove_debugfs_files(struct controller *ctrl)
232{
233 if (ctrl->dentry)
234 debugfs_remove(ctrl->dentry);
235 ctrl->dentry = NULL;
236}
237