blob: 137ed93ee33fefc50b1063036dfc8e9e5e2e9b12 [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
Zhang Weie0423232008-04-18 13:33:42 -070043 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
44 i++) {
Matt Porter394b7012005-11-07 01:00:15 -080045 if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
46 continue;
47 str +=
48 sprintf(str, "%04x %02x\n", i,
49 rdev->rswitch->route_table[i]);
50 }
51
Matt Porter394b7012005-11-07 01:00:15 -080052 return (str - buf);
53}
54
55struct device_attribute rio_dev_attrs[] = {
56 __ATTR_RO(did),
57 __ATTR_RO(vid),
58 __ATTR_RO(device_rev),
59 __ATTR_RO(asm_did),
60 __ATTR_RO(asm_vid),
61 __ATTR_RO(asm_rev),
Matt Porter394b7012005-11-07 01:00:15 -080062 __ATTR_NULL,
63};
64
Alexandre Bounineac38d722010-10-27 15:34:31 -070065static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
66
Matt Porter394b7012005-11-07 01:00:15 -080067static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -070068rio_read_config(struct file *filp, struct kobject *kobj,
69 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +080070 char *buf, loff_t off, size_t count)
Matt Porter394b7012005-11-07 01:00:15 -080071{
72 struct rio_dev *dev =
73 to_rio_dev(container_of(kobj, struct device, kobj));
74 unsigned int size = 0x100;
75 loff_t init_off = off;
76 u8 *data = (u8 *) buf;
77
78 /* Several chips lock up trying to read undefined config space */
79 if (capable(CAP_SYS_ADMIN))
80 size = 0x200000;
81
82 if (off > size)
83 return 0;
84 if (off + count > size) {
85 size -= off;
86 count = size;
87 } else {
88 size = count;
89 }
90
91 if ((off & 1) && size) {
92 u8 val;
93 rio_read_config_8(dev, off, &val);
94 data[off - init_off] = val;
95 off++;
96 size--;
97 }
98
99 if ((off & 3) && size > 2) {
100 u16 val;
101 rio_read_config_16(dev, off, &val);
102 data[off - init_off] = (val >> 8) & 0xff;
103 data[off - init_off + 1] = val & 0xff;
104 off += 2;
105 size -= 2;
106 }
107
108 while (size > 3) {
109 u32 val;
110 rio_read_config_32(dev, off, &val);
111 data[off - init_off] = (val >> 24) & 0xff;
112 data[off - init_off + 1] = (val >> 16) & 0xff;
113 data[off - init_off + 2] = (val >> 8) & 0xff;
114 data[off - init_off + 3] = val & 0xff;
115 off += 4;
116 size -= 4;
117 }
118
119 if (size >= 2) {
120 u16 val;
121 rio_read_config_16(dev, off, &val);
122 data[off - init_off] = (val >> 8) & 0xff;
123 data[off - init_off + 1] = val & 0xff;
124 off += 2;
125 size -= 2;
126 }
127
128 if (size > 0) {
129 u8 val;
130 rio_read_config_8(dev, off, &val);
131 data[off - init_off] = val;
132 off++;
133 --size;
134 }
135
136 return count;
137}
138
139static ssize_t
Chris Wright2c3c8be2010-05-12 18:28:57 -0700140rio_write_config(struct file *filp, struct kobject *kobj,
141 struct bin_attribute *bin_attr,
Zhang Rui91a69022007-06-09 13:57:22 +0800142 char *buf, loff_t off, size_t count)
Matt Porter394b7012005-11-07 01:00:15 -0800143{
144 struct rio_dev *dev =
145 to_rio_dev(container_of(kobj, struct device, kobj));
146 unsigned int size = count;
147 loff_t init_off = off;
148 u8 *data = (u8 *) buf;
149
150 if (off > 0x200000)
151 return 0;
152 if (off + count > 0x200000) {
153 size = 0x200000 - off;
154 count = size;
155 }
156
157 if ((off & 1) && size) {
158 rio_write_config_8(dev, off, data[off - init_off]);
159 off++;
160 size--;
161 }
162
163 if ((off & 3) && (size > 2)) {
164 u16 val = data[off - init_off + 1];
165 val |= (u16) data[off - init_off] << 8;
166 rio_write_config_16(dev, off, val);
167 off += 2;
168 size -= 2;
169 }
170
171 while (size > 3) {
172 u32 val = data[off - init_off + 3];
173 val |= (u32) data[off - init_off + 2] << 8;
174 val |= (u32) data[off - init_off + 1] << 16;
175 val |= (u32) data[off - init_off] << 24;
176 rio_write_config_32(dev, off, val);
177 off += 4;
178 size -= 4;
179 }
180
181 if (size >= 2) {
182 u16 val = data[off - init_off + 1];
183 val |= (u16) data[off - init_off] << 8;
184 rio_write_config_16(dev, off, val);
185 off += 2;
186 size -= 2;
187 }
188
189 if (size) {
190 rio_write_config_8(dev, off, data[off - init_off]);
191 off++;
192 --size;
193 }
194
195 return count;
196}
197
198static struct bin_attribute rio_config_attr = {
199 .attr = {
200 .name = "config",
201 .mode = S_IRUGO | S_IWUSR,
Matt Porter394b7012005-11-07 01:00:15 -0800202 },
203 .size = 0x200000,
204 .read = rio_read_config,
205 .write = rio_write_config,
206};
207
208/**
209 * rio_create_sysfs_dev_files - create RIO specific sysfs files
210 * @rdev: device whose entries should be created
211 *
212 * Create files when @rdev is added to sysfs.
213 */
214int rio_create_sysfs_dev_files(struct rio_dev *rdev)
215{
Yang Li5f28c522009-05-11 22:36:02 +0000216 int err = 0;
Matt Porter394b7012005-11-07 01:00:15 -0800217
Alexandre Bounineac38d722010-10-27 15:34:31 -0700218 err = device_create_bin_file(&rdev->dev, &rio_config_attr);
219
220 if (!err && rdev->rswitch) {
221 err = device_create_file(&rdev->dev, &dev_attr_routes);
222 if (!err && rdev->rswitch->sw_sysfs)
223 err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
224 }
225
226 if (err)
227 pr_warning("RIO: Failed to create attribute file(s) for %s\n",
228 rio_name(rdev));
Yang Li5f28c522009-05-11 22:36:02 +0000229
230 return err;
Matt Porter394b7012005-11-07 01:00:15 -0800231}
232
233/**
234 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
235 * @rdev: device whose entries we should free
236 *
237 * Cleanup when @rdev is removed from sysfs.
238 */
239void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
240{
Alexandre Bounineac38d722010-10-27 15:34:31 -0700241 device_remove_bin_file(&rdev->dev, &rio_config_attr);
242 if (rdev->rswitch) {
243 device_remove_file(&rdev->dev, &dev_attr_routes);
244 if (rdev->rswitch->sw_sysfs)
245 rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
246 }
Matt Porter394b7012005-11-07 01:00:15 -0800247}