blob: 00b475658356f7b66bebeba2d735bc6de848de09 [file] [log] [blame]
Matt Porter394b7012005-11-07 01:00:15 -08001/*
2 * RapidIO sysfs attributes and support
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
Matt Porter394b7012005-11-07 01:00:15 -080013#include <linux/kernel.h>
14#include <linux/rio.h>
15#include <linux/rio_drv.h>
16#include <linux/stat.h>
17
18#include "rio.h"
19
20/* Sysfs support */
21#define rio_config_attr(field, format_string) \
22static ssize_t \
Matt Porter6978bbc2005-11-07 01:00:20 -080023field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
Matt Porter394b7012005-11-07 01:00:15 -080024{ \
25 struct rio_dev *rdev = to_rio_dev(dev); \
26 \
27 return sprintf(buf, format_string, rdev->field); \
28} \
29
30rio_config_attr(did, "0x%04x\n");
31rio_config_attr(vid, "0x%04x\n");
32rio_config_attr(device_rev, "0x%08x\n");
33rio_config_attr(asm_did, "0x%04x\n");
34rio_config_attr(asm_vid, "0x%04x\n");
35rio_config_attr(asm_rev, "0x%04x\n");
36
Matt Porter6978bbc2005-11-07 01:00:20 -080037static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf)
Matt Porter394b7012005-11-07 01:00:15 -080038{
39 struct rio_dev *rdev = to_rio_dev(dev);
40 char *str = buf;
41 int i;
42
43 if (!rdev->rswitch)
44 goto out;
45
Zhang Weie0423232008-04-18 13:33:42 -070046 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
47 i++) {
Matt Porter394b7012005-11-07 01:00:15 -080048 if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
49 continue;
50 str +=
51 sprintf(str, "%04x %02x\n", i,
52 rdev->rswitch->route_table[i]);
53 }
54
55 out:
56 return (str - buf);
57}
58
59struct device_attribute rio_dev_attrs[] = {
60 __ATTR_RO(did),
61 __ATTR_RO(vid),
62 __ATTR_RO(device_rev),
63 __ATTR_RO(asm_did),
64 __ATTR_RO(asm_vid),
65 __ATTR_RO(asm_rev),
66 __ATTR_RO(routes),
67 __ATTR_NULL,
68};
69
70static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -070071rio_read_config(struct file *filp, struct kobject *kobj,
72 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +080073 char *buf, loff_t off, size_t count)
Matt Porter394b7012005-11-07 01:00:15 -080074{
75 struct rio_dev *dev =
76 to_rio_dev(container_of(kobj, struct device, kobj));
77 unsigned int size = 0x100;
78 loff_t init_off = off;
79 u8 *data = (u8 *) buf;
80
81 /* Several chips lock up trying to read undefined config space */
82 if (capable(CAP_SYS_ADMIN))
83 size = 0x200000;
84
85 if (off > size)
86 return 0;
87 if (off + count > size) {
88 size -= off;
89 count = size;
90 } else {
91 size = count;
92 }
93
94 if ((off & 1) && size) {
95 u8 val;
96 rio_read_config_8(dev, off, &val);
97 data[off - init_off] = val;
98 off++;
99 size--;
100 }
101
102 if ((off & 3) && size > 2) {
103 u16 val;
104 rio_read_config_16(dev, off, &val);
105 data[off - init_off] = (val >> 8) & 0xff;
106 data[off - init_off + 1] = val & 0xff;
107 off += 2;
108 size -= 2;
109 }
110
111 while (size > 3) {
112 u32 val;
113 rio_read_config_32(dev, off, &val);
114 data[off - init_off] = (val >> 24) & 0xff;
115 data[off - init_off + 1] = (val >> 16) & 0xff;
116 data[off - init_off + 2] = (val >> 8) & 0xff;
117 data[off - init_off + 3] = val & 0xff;
118 off += 4;
119 size -= 4;
120 }
121
122 if (size >= 2) {
123 u16 val;
124 rio_read_config_16(dev, off, &val);
125 data[off - init_off] = (val >> 8) & 0xff;
126 data[off - init_off + 1] = val & 0xff;
127 off += 2;
128 size -= 2;
129 }
130
131 if (size > 0) {
132 u8 val;
133 rio_read_config_8(dev, off, &val);
134 data[off - init_off] = val;
135 off++;
136 --size;
137 }
138
139 return count;
140}
141
142static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700143rio_write_config(struct file *filp, struct kobject *kobj,
144 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800145 char *buf, loff_t off, size_t count)
Matt Porter394b7012005-11-07 01:00:15 -0800146{
147 struct rio_dev *dev =
148 to_rio_dev(container_of(kobj, struct device, kobj));
149 unsigned int size = count;
150 loff_t init_off = off;
151 u8 *data = (u8 *) buf;
152
153 if (off > 0x200000)
154 return 0;
155 if (off + count > 0x200000) {
156 size = 0x200000 - off;
157 count = size;
158 }
159
160 if ((off & 1) && size) {
161 rio_write_config_8(dev, off, data[off - init_off]);
162 off++;
163 size--;
164 }
165
166 if ((off & 3) && (size > 2)) {
167 u16 val = data[off - init_off + 1];
168 val |= (u16) data[off - init_off] << 8;
169 rio_write_config_16(dev, off, val);
170 off += 2;
171 size -= 2;
172 }
173
174 while (size > 3) {
175 u32 val = data[off - init_off + 3];
176 val |= (u32) data[off - init_off + 2] << 8;
177 val |= (u32) data[off - init_off + 1] << 16;
178 val |= (u32) data[off - init_off] << 24;
179 rio_write_config_32(dev, off, val);
180 off += 4;
181 size -= 4;
182 }
183
184 if (size >= 2) {
185 u16 val = data[off - init_off + 1];
186 val |= (u16) data[off - init_off] << 8;
187 rio_write_config_16(dev, off, val);
188 off += 2;
189 size -= 2;
190 }
191
192 if (size) {
193 rio_write_config_8(dev, off, data[off - init_off]);
194 off++;
195 --size;
196 }
197
198 return count;
199}
200
201static struct bin_attribute rio_config_attr = {
202 .attr = {
203 .name = "config",
204 .mode = S_IRUGO | S_IWUSR,
Matt Porter394b7012005-11-07 01:00:15 -0800205 },
206 .size = 0x200000,
207 .read = rio_read_config,
208 .write = rio_write_config,
209};
210
211/**
212 * rio_create_sysfs_dev_files - create RIO specific sysfs files
213 * @rdev: device whose entries should be created
214 *
215 * Create files when @rdev is added to sysfs.
216 */
217int rio_create_sysfs_dev_files(struct rio_dev *rdev)
218{
Yang Li5f28c522009-05-11 22:36:02 +0000219 int err = 0;
Matt Porter394b7012005-11-07 01:00:15 -0800220
Yang Li5f28c522009-05-11 22:36:02 +0000221 err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
222
223 return err;
Matt Porter394b7012005-11-07 01:00:15 -0800224}
225
226/**
227 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
228 * @rdev: device whose entries we should free
229 *
230 * Cleanup when @rdev is removed from sysfs.
231 */
232void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
233{
234 sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
235}