Commit | Line | Data |
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394b701c MP |
1 | /* |
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 | ||
394b701c MP |
13 | #include <linux/kernel.h> |
14 | #include <linux/rio.h> | |
15 | #include <linux/rio_drv.h> | |
16 | #include <linux/stat.h> | |
388b78ad | 17 | #include <linux/capability.h> |
394b701c MP |
18 | |
19 | #include "rio.h" | |
20 | ||
21 | /* Sysfs support */ | |
22 | #define rio_config_attr(field, format_string) \ | |
23 | static ssize_t \ | |
6978bbc0 | 24 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
394b701c MP |
25 | { \ |
26 | struct rio_dev *rdev = to_rio_dev(dev); \ | |
27 | \ | |
28 | return sprintf(buf, format_string, rdev->field); \ | |
29 | } \ | |
30 | ||
31 | rio_config_attr(did, "0x%04x\n"); | |
32 | rio_config_attr(vid, "0x%04x\n"); | |
33 | rio_config_attr(device_rev, "0x%08x\n"); | |
34 | rio_config_attr(asm_did, "0x%04x\n"); | |
35 | rio_config_attr(asm_vid, "0x%04x\n"); | |
36 | rio_config_attr(asm_rev, "0x%04x\n"); | |
cd8b974f AB |
37 | rio_config_attr(destid, "0x%04x\n"); |
38 | rio_config_attr(hopcount, "0x%02x\n"); | |
394b701c | 39 | |
6978bbc0 | 40 | static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) |
394b701c MP |
41 | { |
42 | struct rio_dev *rdev = to_rio_dev(dev); | |
43 | char *str = buf; | |
44 | int i; | |
45 | ||
e0423236 ZW |
46 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); |
47 | i++) { | |
394b701c MP |
48 | 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 | ||
394b701c MP |
55 | return (str - buf); |
56 | } | |
57 | ||
cd8b974f AB |
58 | static ssize_t lprev_show(struct device *dev, |
59 | struct device_attribute *attr, char *buf) | |
60 | { | |
61 | struct rio_dev *rdev = to_rio_dev(dev); | |
62 | ||
63 | return sprintf(buf, "%s\n", | |
64 | (rdev->prev) ? rio_name(rdev->prev) : "root"); | |
65 | } | |
66 | ||
67 | static ssize_t lnext_show(struct device *dev, | |
68 | struct device_attribute *attr, char *buf) | |
69 | { | |
70 | struct rio_dev *rdev = to_rio_dev(dev); | |
71 | char *str = buf; | |
72 | int i; | |
73 | ||
74 | if (rdev->pef & RIO_PEF_SWITCH) { | |
75 | for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) { | |
76 | if (rdev->rswitch->nextdev[i]) | |
77 | str += sprintf(str, "%s\n", | |
78 | rio_name(rdev->rswitch->nextdev[i])); | |
79 | else | |
80 | str += sprintf(str, "null\n"); | |
81 | } | |
82 | } | |
83 | ||
84 | return str - buf; | |
85 | } | |
86 | ||
394b701c MP |
87 | struct device_attribute rio_dev_attrs[] = { |
88 | __ATTR_RO(did), | |
89 | __ATTR_RO(vid), | |
90 | __ATTR_RO(device_rev), | |
91 | __ATTR_RO(asm_did), | |
92 | __ATTR_RO(asm_vid), | |
93 | __ATTR_RO(asm_rev), | |
cd8b974f AB |
94 | __ATTR_RO(lprev), |
95 | __ATTR_RO(destid), | |
394b701c MP |
96 | __ATTR_NULL, |
97 | }; | |
98 | ||
ac38d723 | 99 | static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL); |
cd8b974f AB |
100 | static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL); |
101 | static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL); | |
ac38d723 | 102 | |
394b701c | 103 | static ssize_t |
2c3c8bea CW |
104 | rio_read_config(struct file *filp, struct kobject *kobj, |
105 | struct bin_attribute *bin_attr, | |
91a69029 | 106 | char *buf, loff_t off, size_t count) |
394b701c MP |
107 | { |
108 | struct rio_dev *dev = | |
109 | to_rio_dev(container_of(kobj, struct device, kobj)); | |
110 | unsigned int size = 0x100; | |
111 | loff_t init_off = off; | |
112 | u8 *data = (u8 *) buf; | |
113 | ||
114 | /* Several chips lock up trying to read undefined config space */ | |
115 | if (capable(CAP_SYS_ADMIN)) | |
fe41947e | 116 | size = RIO_MAINT_SPACE_SZ; |
394b701c | 117 | |
fe41947e | 118 | if (off >= size) |
394b701c MP |
119 | return 0; |
120 | if (off + count > size) { | |
121 | size -= off; | |
122 | count = size; | |
123 | } else { | |
124 | size = count; | |
125 | } | |
126 | ||
127 | if ((off & 1) && size) { | |
128 | u8 val; | |
129 | rio_read_config_8(dev, off, &val); | |
130 | data[off - init_off] = val; | |
131 | off++; | |
132 | size--; | |
133 | } | |
134 | ||
135 | if ((off & 3) && size > 2) { | |
136 | u16 val; | |
137 | rio_read_config_16(dev, off, &val); | |
138 | data[off - init_off] = (val >> 8) & 0xff; | |
139 | data[off - init_off + 1] = val & 0xff; | |
140 | off += 2; | |
141 | size -= 2; | |
142 | } | |
143 | ||
144 | while (size > 3) { | |
145 | u32 val; | |
146 | rio_read_config_32(dev, off, &val); | |
147 | data[off - init_off] = (val >> 24) & 0xff; | |
148 | data[off - init_off + 1] = (val >> 16) & 0xff; | |
149 | data[off - init_off + 2] = (val >> 8) & 0xff; | |
150 | data[off - init_off + 3] = val & 0xff; | |
151 | off += 4; | |
152 | size -= 4; | |
153 | } | |
154 | ||
155 | if (size >= 2) { | |
156 | u16 val; | |
157 | rio_read_config_16(dev, off, &val); | |
158 | data[off - init_off] = (val >> 8) & 0xff; | |
159 | data[off - init_off + 1] = val & 0xff; | |
160 | off += 2; | |
161 | size -= 2; | |
162 | } | |
163 | ||
164 | if (size > 0) { | |
165 | u8 val; | |
166 | rio_read_config_8(dev, off, &val); | |
167 | data[off - init_off] = val; | |
168 | off++; | |
169 | --size; | |
170 | } | |
171 | ||
172 | return count; | |
173 | } | |
174 | ||
175 | static ssize_t | |
2c3c8bea CW |
176 | rio_write_config(struct file *filp, struct kobject *kobj, |
177 | struct bin_attribute *bin_attr, | |
91a69029 | 178 | char *buf, loff_t off, size_t count) |
394b701c MP |
179 | { |
180 | struct rio_dev *dev = | |
181 | to_rio_dev(container_of(kobj, struct device, kobj)); | |
182 | unsigned int size = count; | |
183 | loff_t init_off = off; | |
184 | u8 *data = (u8 *) buf; | |
185 | ||
fe41947e | 186 | if (off >= RIO_MAINT_SPACE_SZ) |
394b701c | 187 | return 0; |
fe41947e AB |
188 | if (off + count > RIO_MAINT_SPACE_SZ) { |
189 | size = RIO_MAINT_SPACE_SZ - off; | |
394b701c MP |
190 | count = size; |
191 | } | |
192 | ||
193 | if ((off & 1) && size) { | |
194 | rio_write_config_8(dev, off, data[off - init_off]); | |
195 | off++; | |
196 | size--; | |
197 | } | |
198 | ||
199 | if ((off & 3) && (size > 2)) { | |
200 | u16 val = data[off - init_off + 1]; | |
201 | val |= (u16) data[off - init_off] << 8; | |
202 | rio_write_config_16(dev, off, val); | |
203 | off += 2; | |
204 | size -= 2; | |
205 | } | |
206 | ||
207 | while (size > 3) { | |
208 | u32 val = data[off - init_off + 3]; | |
209 | val |= (u32) data[off - init_off + 2] << 8; | |
210 | val |= (u32) data[off - init_off + 1] << 16; | |
211 | val |= (u32) data[off - init_off] << 24; | |
212 | rio_write_config_32(dev, off, val); | |
213 | off += 4; | |
214 | size -= 4; | |
215 | } | |
216 | ||
217 | if (size >= 2) { | |
218 | u16 val = data[off - init_off + 1]; | |
219 | val |= (u16) data[off - init_off] << 8; | |
220 | rio_write_config_16(dev, off, val); | |
221 | off += 2; | |
222 | size -= 2; | |
223 | } | |
224 | ||
225 | if (size) { | |
226 | rio_write_config_8(dev, off, data[off - init_off]); | |
227 | off++; | |
228 | --size; | |
229 | } | |
230 | ||
231 | return count; | |
232 | } | |
233 | ||
234 | static struct bin_attribute rio_config_attr = { | |
235 | .attr = { | |
236 | .name = "config", | |
237 | .mode = S_IRUGO | S_IWUSR, | |
394b701c | 238 | }, |
fe41947e | 239 | .size = RIO_MAINT_SPACE_SZ, |
394b701c MP |
240 | .read = rio_read_config, |
241 | .write = rio_write_config, | |
242 | }; | |
243 | ||
244 | /** | |
245 | * rio_create_sysfs_dev_files - create RIO specific sysfs files | |
246 | * @rdev: device whose entries should be created | |
247 | * | |
248 | * Create files when @rdev is added to sysfs. | |
249 | */ | |
250 | int rio_create_sysfs_dev_files(struct rio_dev *rdev) | |
251 | { | |
5f28c520 | 252 | int err = 0; |
394b701c | 253 | |
ac38d723 AB |
254 | err = device_create_bin_file(&rdev->dev, &rio_config_attr); |
255 | ||
ded05782 | 256 | if (!err && (rdev->pef & RIO_PEF_SWITCH)) { |
cd8b974f AB |
257 | err |= device_create_file(&rdev->dev, &dev_attr_routes); |
258 | err |= device_create_file(&rdev->dev, &dev_attr_lnext); | |
259 | err |= device_create_file(&rdev->dev, &dev_attr_hopcount); | |
ac38d723 AB |
260 | if (!err && rdev->rswitch->sw_sysfs) |
261 | err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE); | |
262 | } | |
263 | ||
264 | if (err) | |
265 | pr_warning("RIO: Failed to create attribute file(s) for %s\n", | |
266 | rio_name(rdev)); | |
5f28c520 YL |
267 | |
268 | return err; | |
394b701c MP |
269 | } |
270 | ||
271 | /** | |
272 | * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files | |
273 | * @rdev: device whose entries we should free | |
274 | * | |
275 | * Cleanup when @rdev is removed from sysfs. | |
276 | */ | |
277 | void rio_remove_sysfs_dev_files(struct rio_dev *rdev) | |
278 | { | |
ac38d723 | 279 | device_remove_bin_file(&rdev->dev, &rio_config_attr); |
ded05782 | 280 | if (rdev->pef & RIO_PEF_SWITCH) { |
ac38d723 | 281 | device_remove_file(&rdev->dev, &dev_attr_routes); |
cd8b974f AB |
282 | device_remove_file(&rdev->dev, &dev_attr_lnext); |
283 | device_remove_file(&rdev->dev, &dev_attr_hopcount); | |
ac38d723 AB |
284 | if (rdev->rswitch->sw_sysfs) |
285 | rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE); | |
286 | } | |
394b701c | 287 | } |