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 | ||
3bdbb62f AB |
87 | static ssize_t modalias_show(struct device *dev, |
88 | struct device_attribute *attr, char *buf) | |
89 | { | |
90 | struct rio_dev *rdev = to_rio_dev(dev); | |
91 | ||
92 | return sprintf(buf, "rapidio:v%04Xd%04Xav%04Xad%04X\n", | |
93 | rdev->vid, rdev->did, rdev->asm_vid, rdev->asm_did); | |
94 | } | |
95 | ||
394b701c MP |
96 | struct device_attribute rio_dev_attrs[] = { |
97 | __ATTR_RO(did), | |
98 | __ATTR_RO(vid), | |
99 | __ATTR_RO(device_rev), | |
100 | __ATTR_RO(asm_did), | |
101 | __ATTR_RO(asm_vid), | |
102 | __ATTR_RO(asm_rev), | |
cd8b974f AB |
103 | __ATTR_RO(lprev), |
104 | __ATTR_RO(destid), | |
3bdbb62f | 105 | __ATTR_RO(modalias), |
394b701c MP |
106 | __ATTR_NULL, |
107 | }; | |
108 | ||
ac38d723 | 109 | static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL); |
cd8b974f AB |
110 | static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL); |
111 | static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL); | |
ac38d723 | 112 | |
394b701c | 113 | static ssize_t |
2c3c8bea CW |
114 | rio_read_config(struct file *filp, struct kobject *kobj, |
115 | struct bin_attribute *bin_attr, | |
91a69029 | 116 | char *buf, loff_t off, size_t count) |
394b701c MP |
117 | { |
118 | struct rio_dev *dev = | |
119 | to_rio_dev(container_of(kobj, struct device, kobj)); | |
120 | unsigned int size = 0x100; | |
121 | loff_t init_off = off; | |
122 | u8 *data = (u8 *) buf; | |
123 | ||
124 | /* Several chips lock up trying to read undefined config space */ | |
125 | if (capable(CAP_SYS_ADMIN)) | |
fe41947e | 126 | size = RIO_MAINT_SPACE_SZ; |
394b701c | 127 | |
fe41947e | 128 | if (off >= size) |
394b701c MP |
129 | return 0; |
130 | if (off + count > size) { | |
131 | size -= off; | |
132 | count = size; | |
133 | } else { | |
134 | size = count; | |
135 | } | |
136 | ||
137 | if ((off & 1) && size) { | |
138 | u8 val; | |
139 | rio_read_config_8(dev, off, &val); | |
140 | data[off - init_off] = val; | |
141 | off++; | |
142 | size--; | |
143 | } | |
144 | ||
145 | if ((off & 3) && size > 2) { | |
146 | u16 val; | |
147 | rio_read_config_16(dev, off, &val); | |
148 | data[off - init_off] = (val >> 8) & 0xff; | |
149 | data[off - init_off + 1] = val & 0xff; | |
150 | off += 2; | |
151 | size -= 2; | |
152 | } | |
153 | ||
154 | while (size > 3) { | |
155 | u32 val; | |
156 | rio_read_config_32(dev, off, &val); | |
157 | data[off - init_off] = (val >> 24) & 0xff; | |
158 | data[off - init_off + 1] = (val >> 16) & 0xff; | |
159 | data[off - init_off + 2] = (val >> 8) & 0xff; | |
160 | data[off - init_off + 3] = val & 0xff; | |
161 | off += 4; | |
162 | size -= 4; | |
163 | } | |
164 | ||
165 | if (size >= 2) { | |
166 | u16 val; | |
167 | rio_read_config_16(dev, off, &val); | |
168 | data[off - init_off] = (val >> 8) & 0xff; | |
169 | data[off - init_off + 1] = val & 0xff; | |
170 | off += 2; | |
171 | size -= 2; | |
172 | } | |
173 | ||
174 | if (size > 0) { | |
175 | u8 val; | |
176 | rio_read_config_8(dev, off, &val); | |
177 | data[off - init_off] = val; | |
178 | off++; | |
179 | --size; | |
180 | } | |
181 | ||
182 | return count; | |
183 | } | |
184 | ||
185 | static ssize_t | |
2c3c8bea CW |
186 | rio_write_config(struct file *filp, struct kobject *kobj, |
187 | struct bin_attribute *bin_attr, | |
91a69029 | 188 | char *buf, loff_t off, size_t count) |
394b701c MP |
189 | { |
190 | struct rio_dev *dev = | |
191 | to_rio_dev(container_of(kobj, struct device, kobj)); | |
192 | unsigned int size = count; | |
193 | loff_t init_off = off; | |
194 | u8 *data = (u8 *) buf; | |
195 | ||
fe41947e | 196 | if (off >= RIO_MAINT_SPACE_SZ) |
394b701c | 197 | return 0; |
fe41947e AB |
198 | if (off + count > RIO_MAINT_SPACE_SZ) { |
199 | size = RIO_MAINT_SPACE_SZ - off; | |
394b701c MP |
200 | count = size; |
201 | } | |
202 | ||
203 | if ((off & 1) && size) { | |
204 | rio_write_config_8(dev, off, data[off - init_off]); | |
205 | off++; | |
206 | size--; | |
207 | } | |
208 | ||
209 | if ((off & 3) && (size > 2)) { | |
210 | u16 val = data[off - init_off + 1]; | |
211 | val |= (u16) data[off - init_off] << 8; | |
212 | rio_write_config_16(dev, off, val); | |
213 | off += 2; | |
214 | size -= 2; | |
215 | } | |
216 | ||
217 | while (size > 3) { | |
218 | u32 val = data[off - init_off + 3]; | |
219 | val |= (u32) data[off - init_off + 2] << 8; | |
220 | val |= (u32) data[off - init_off + 1] << 16; | |
221 | val |= (u32) data[off - init_off] << 24; | |
222 | rio_write_config_32(dev, off, val); | |
223 | off += 4; | |
224 | size -= 4; | |
225 | } | |
226 | ||
227 | if (size >= 2) { | |
228 | u16 val = data[off - init_off + 1]; | |
229 | val |= (u16) data[off - init_off] << 8; | |
230 | rio_write_config_16(dev, off, val); | |
231 | off += 2; | |
232 | size -= 2; | |
233 | } | |
234 | ||
235 | if (size) { | |
236 | rio_write_config_8(dev, off, data[off - init_off]); | |
237 | off++; | |
238 | --size; | |
239 | } | |
240 | ||
241 | return count; | |
242 | } | |
243 | ||
244 | static struct bin_attribute rio_config_attr = { | |
245 | .attr = { | |
246 | .name = "config", | |
247 | .mode = S_IRUGO | S_IWUSR, | |
394b701c | 248 | }, |
fe41947e | 249 | .size = RIO_MAINT_SPACE_SZ, |
394b701c MP |
250 | .read = rio_read_config, |
251 | .write = rio_write_config, | |
252 | }; | |
253 | ||
254 | /** | |
255 | * rio_create_sysfs_dev_files - create RIO specific sysfs files | |
256 | * @rdev: device whose entries should be created | |
257 | * | |
258 | * Create files when @rdev is added to sysfs. | |
259 | */ | |
260 | int rio_create_sysfs_dev_files(struct rio_dev *rdev) | |
261 | { | |
5f28c520 | 262 | int err = 0; |
394b701c | 263 | |
ac38d723 AB |
264 | err = device_create_bin_file(&rdev->dev, &rio_config_attr); |
265 | ||
ded05782 | 266 | if (!err && (rdev->pef & RIO_PEF_SWITCH)) { |
cd8b974f AB |
267 | err |= device_create_file(&rdev->dev, &dev_attr_routes); |
268 | err |= device_create_file(&rdev->dev, &dev_attr_lnext); | |
269 | err |= device_create_file(&rdev->dev, &dev_attr_hopcount); | |
ac38d723 AB |
270 | } |
271 | ||
272 | if (err) | |
273 | pr_warning("RIO: Failed to create attribute file(s) for %s\n", | |
274 | rio_name(rdev)); | |
5f28c520 YL |
275 | |
276 | return err; | |
394b701c MP |
277 | } |
278 | ||
279 | /** | |
280 | * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files | |
281 | * @rdev: device whose entries we should free | |
282 | * | |
283 | * Cleanup when @rdev is removed from sysfs. | |
284 | */ | |
285 | void rio_remove_sysfs_dev_files(struct rio_dev *rdev) | |
286 | { | |
ac38d723 | 287 | device_remove_bin_file(&rdev->dev, &rio_config_attr); |
ded05782 | 288 | if (rdev->pef & RIO_PEF_SWITCH) { |
ac38d723 | 289 | device_remove_file(&rdev->dev, &dev_attr_routes); |
cd8b974f AB |
290 | device_remove_file(&rdev->dev, &dev_attr_lnext); |
291 | device_remove_file(&rdev->dev, &dev_attr_hopcount); | |
ac38d723 | 292 | } |
394b701c | 293 | } |
bc8fcfea AB |
294 | |
295 | static ssize_t bus_scan_store(struct bus_type *bus, const char *buf, | |
296 | size_t count) | |
297 | { | |
298 | long val; | |
bc8fcfea AB |
299 | int rc; |
300 | ||
301 | if (kstrtol(buf, 0, &val) < 0) | |
302 | return -EINVAL; | |
303 | ||
304 | if (val == RIO_MPORT_ANY) { | |
305 | rc = rio_init_mports(); | |
306 | goto exit; | |
307 | } | |
308 | ||
309 | if (val < 0 || val >= RIO_MAX_MPORTS) | |
310 | return -EINVAL; | |
311 | ||
9edbc30b | 312 | rc = rio_mport_scan((int)val); |
bc8fcfea AB |
313 | exit: |
314 | if (!rc) | |
315 | rc = count; | |
316 | ||
317 | return rc; | |
318 | } | |
319 | ||
320 | struct bus_attribute rio_bus_attrs[] = { | |
321 | __ATTR(scan, (S_IWUSR|S_IWGRP), NULL, bus_scan_store), | |
322 | __ATTR_NULL | |
323 | }; |