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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 | |
13 | #include <linux/kernel.h> |
14 | #include <linux/rio.h> |
15 | #include <linux/rio_drv.h> |
16 | #include <linux/stat.h> |
17 | #include <linux/capability.h> |
18 | |
19 | #include "rio.h" |
20 | |
21 | /* Sysfs support */ |
22 | #define rio_config_attr(field, format_string) \ |
23 | static ssize_t \ |
24 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
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"); |
37 | rio_config_attr(destid, "0x%04x\n"); |
38 | rio_config_attr(hopcount, "0x%02x\n"); |
39 | |
40 | static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) |
41 | { |
42 | struct rio_dev *rdev = to_rio_dev(dev); |
43 | char *str = buf; |
44 | int i; |
45 | |
46 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); |
47 | i++) { |
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 | |
55 | return (str - buf); |
56 | } |
57 | |
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 | |
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), |
94 | __ATTR_RO(lprev), |
95 | __ATTR_RO(destid), |
96 | __ATTR_NULL, |
97 | }; |
98 | |
99 | static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL); |
100 | static DEVICE_ATTR(lnext, S_IRUGO, lnext_show, NULL); |
101 | static DEVICE_ATTR(hopcount, S_IRUGO, hopcount_show, NULL); |
102 | |
103 | static ssize_t |
104 | rio_read_config(struct file *filp, struct kobject *kobj, |
105 | struct bin_attribute *bin_attr, |
106 | char *buf, loff_t off, size_t count) |
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)) |
116 | size = RIO_MAINT_SPACE_SZ; |
117 | |
118 | if (off >= size) |
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 |
176 | rio_write_config(struct file *filp, struct kobject *kobj, |
177 | struct bin_attribute *bin_attr, |
178 | char *buf, loff_t off, size_t count) |
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 | |
186 | if (off >= RIO_MAINT_SPACE_SZ) |
187 | return 0; |
188 | if (off + count > RIO_MAINT_SPACE_SZ) { |
189 | size = RIO_MAINT_SPACE_SZ - off; |
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, |
238 | }, |
239 | .size = RIO_MAINT_SPACE_SZ, |
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 | { |
252 | int err = 0; |
253 | |
254 | err = device_create_bin_file(&rdev->dev, &rio_config_attr); |
255 | |
256 | if (!err && (rdev->pef & RIO_PEF_SWITCH)) { |
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); |
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)); |
267 | |
268 | return err; |
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 | { |
279 | device_remove_bin_file(&rdev->dev, &rio_config_attr); |
280 | if (rdev->pef & RIO_PEF_SWITCH) { |
281 | device_remove_file(&rdev->dev, &dev_attr_routes); |
282 | device_remove_file(&rdev->dev, &dev_attr_lnext); |
283 | device_remove_file(&rdev->dev, &dev_attr_hopcount); |
284 | if (rdev->rswitch->sw_sysfs) |
285 | rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE); |
286 | } |
287 | } |
288 |
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