Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
394b701c MP |
2 | /* |
3 | * RapidIO sysfs attributes and support | |
4 | * | |
5 | * Copyright 2005 MontaVista Software, Inc. | |
6 | * Matt Porter <mporter@kernel.crashing.org> | |
394b701c MP |
7 | */ |
8 | ||
394b701c MP |
9 | #include <linux/kernel.h> |
10 | #include <linux/rio.h> | |
11 | #include <linux/rio_drv.h> | |
12 | #include <linux/stat.h> | |
388b78ad | 13 | #include <linux/capability.h> |
394b701c MP |
14 | |
15 | #include "rio.h" | |
16 | ||
17 | /* Sysfs support */ | |
18 | #define rio_config_attr(field, format_string) \ | |
19 | static ssize_t \ | |
6978bbc0 | 20 | field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ |
394b701c MP |
21 | { \ |
22 | struct rio_dev *rdev = to_rio_dev(dev); \ | |
23 | \ | |
24 | return sprintf(buf, format_string, rdev->field); \ | |
25 | } \ | |
6d39c80b | 26 | static DEVICE_ATTR_RO(field); |
394b701c MP |
27 | |
28 | rio_config_attr(did, "0x%04x\n"); | |
29 | rio_config_attr(vid, "0x%04x\n"); | |
30 | rio_config_attr(device_rev, "0x%08x\n"); | |
31 | rio_config_attr(asm_did, "0x%04x\n"); | |
32 | rio_config_attr(asm_vid, "0x%04x\n"); | |
33 | rio_config_attr(asm_rev, "0x%04x\n"); | |
cd8b974f AB |
34 | rio_config_attr(destid, "0x%04x\n"); |
35 | rio_config_attr(hopcount, "0x%02x\n"); | |
394b701c | 36 | |
6978bbc0 | 37 | static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) |
394b701c MP |
38 | { |
39 | struct rio_dev *rdev = to_rio_dev(dev); | |
40 | char *str = buf; | |
41 | int i; | |
42 | ||
e0423236 ZW |
43 | for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); |
44 | i++) { | |
394b701c MP |
45 | 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 | ||
394b701c MP |
52 | return (str - buf); |
53 | } | |
6d39c80b | 54 | static DEVICE_ATTR_RO(routes); |
394b701c | 55 | |
cd8b974f AB |
56 | static ssize_t lprev_show(struct device *dev, |
57 | struct device_attribute *attr, char *buf) | |
58 | { | |
59 | struct rio_dev *rdev = to_rio_dev(dev); | |
60 | ||
61 | return sprintf(buf, "%s\n", | |
62 | (rdev->prev) ? rio_name(rdev->prev) : "root"); | |
63 | } | |
6d39c80b | 64 | static DEVICE_ATTR_RO(lprev); |
cd8b974f AB |
65 | |
66 | static ssize_t lnext_show(struct device *dev, | |
67 | struct device_attribute *attr, char *buf) | |
68 | { | |
69 | struct rio_dev *rdev = to_rio_dev(dev); | |
70 | char *str = buf; | |
71 | int i; | |
72 | ||
73 | if (rdev->pef & RIO_PEF_SWITCH) { | |
74 | for (i = 0; i < RIO_GET_TOTAL_PORTS(rdev->swpinfo); i++) { | |
75 | if (rdev->rswitch->nextdev[i]) | |
76 | str += sprintf(str, "%s\n", | |
77 | rio_name(rdev->rswitch->nextdev[i])); | |
78 | else | |
79 | str += sprintf(str, "null\n"); | |
80 | } | |
81 | } | |
82 | ||
83 | return str - buf; | |
84 | } | |
6d39c80b | 85 | static DEVICE_ATTR_RO(lnext); |
cd8b974f | 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 | } | |
6d39c80b GKH |
95 | static DEVICE_ATTR_RO(modalias); |
96 | ||
97 | static struct attribute *rio_dev_attrs[] = { | |
98 | &dev_attr_did.attr, | |
99 | &dev_attr_vid.attr, | |
100 | &dev_attr_device_rev.attr, | |
101 | &dev_attr_asm_did.attr, | |
102 | &dev_attr_asm_vid.attr, | |
103 | &dev_attr_asm_rev.attr, | |
104 | &dev_attr_lprev.attr, | |
105 | &dev_attr_destid.attr, | |
106 | &dev_attr_modalias.attr, | |
3bdbb62f | 107 | |
70359c4a DT |
108 | /* Switch-only attributes */ |
109 | &dev_attr_routes.attr, | |
110 | &dev_attr_lnext.attr, | |
111 | &dev_attr_hopcount.attr, | |
6d39c80b GKH |
112 | NULL, |
113 | }; | |
ac38d723 | 114 | |
394b701c | 115 | static ssize_t |
2c3c8bea CW |
116 | rio_read_config(struct file *filp, struct kobject *kobj, |
117 | struct bin_attribute *bin_attr, | |
91a69029 | 118 | char *buf, loff_t off, size_t count) |
394b701c | 119 | { |
a253f1ee | 120 | struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj)); |
394b701c MP |
121 | unsigned int size = 0x100; |
122 | loff_t init_off = off; | |
123 | u8 *data = (u8 *) buf; | |
124 | ||
125 | /* Several chips lock up trying to read undefined config space */ | |
126 | if (capable(CAP_SYS_ADMIN)) | |
fe41947e | 127 | size = RIO_MAINT_SPACE_SZ; |
394b701c | 128 | |
fe41947e | 129 | if (off >= size) |
394b701c MP |
130 | return 0; |
131 | if (off + count > size) { | |
132 | size -= off; | |
133 | count = size; | |
134 | } else { | |
135 | size = count; | |
136 | } | |
137 | ||
138 | if ((off & 1) && size) { | |
139 | u8 val; | |
140 | rio_read_config_8(dev, off, &val); | |
141 | data[off - init_off] = val; | |
142 | off++; | |
143 | size--; | |
144 | } | |
145 | ||
146 | if ((off & 3) && size > 2) { | |
147 | u16 val; | |
148 | rio_read_config_16(dev, off, &val); | |
149 | data[off - init_off] = (val >> 8) & 0xff; | |
150 | data[off - init_off + 1] = val & 0xff; | |
151 | off += 2; | |
152 | size -= 2; | |
153 | } | |
154 | ||
155 | while (size > 3) { | |
156 | u32 val; | |
157 | rio_read_config_32(dev, off, &val); | |
158 | data[off - init_off] = (val >> 24) & 0xff; | |
159 | data[off - init_off + 1] = (val >> 16) & 0xff; | |
160 | data[off - init_off + 2] = (val >> 8) & 0xff; | |
161 | data[off - init_off + 3] = val & 0xff; | |
162 | off += 4; | |
163 | size -= 4; | |
164 | } | |
165 | ||
166 | if (size >= 2) { | |
167 | u16 val; | |
168 | rio_read_config_16(dev, off, &val); | |
169 | data[off - init_off] = (val >> 8) & 0xff; | |
170 | data[off - init_off + 1] = val & 0xff; | |
171 | off += 2; | |
172 | size -= 2; | |
173 | } | |
174 | ||
175 | if (size > 0) { | |
176 | u8 val; | |
177 | rio_read_config_8(dev, off, &val); | |
178 | data[off - init_off] = val; | |
179 | off++; | |
180 | --size; | |
181 | } | |
182 | ||
183 | return count; | |
184 | } | |
185 | ||
186 | static ssize_t | |
2c3c8bea CW |
187 | rio_write_config(struct file *filp, struct kobject *kobj, |
188 | struct bin_attribute *bin_attr, | |
91a69029 | 189 | char *buf, loff_t off, size_t count) |
394b701c | 190 | { |
a253f1ee | 191 | struct rio_dev *dev = to_rio_dev(kobj_to_dev(kobj)); |
394b701c MP |
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 | ||
70359c4a DT |
254 | static struct bin_attribute *rio_dev_bin_attrs[] = { |
255 | &rio_config_attr, | |
256 | NULL, | |
257 | }; | |
ac38d723 | 258 | |
70359c4a DT |
259 | static umode_t rio_dev_is_attr_visible(struct kobject *kobj, |
260 | struct attribute *attr, int n) | |
261 | { | |
262 | struct rio_dev *rdev = to_rio_dev(kobj_to_dev(kobj)); | |
263 | umode_t mode = attr->mode; | |
264 | ||
265 | if (!(rdev->pef & RIO_PEF_SWITCH) && | |
266 | (attr == &dev_attr_routes.attr || | |
267 | attr == &dev_attr_lnext.attr || | |
268 | attr == &dev_attr_hopcount.attr)) { | |
269 | /* | |
270 | * Hide switch-specific attributes for a non-switch device. | |
271 | */ | |
272 | mode = 0; | |
ac38d723 AB |
273 | } |
274 | ||
70359c4a | 275 | return mode; |
394b701c MP |
276 | } |
277 | ||
70359c4a DT |
278 | static const struct attribute_group rio_dev_group = { |
279 | .attrs = rio_dev_attrs, | |
280 | .is_visible = rio_dev_is_attr_visible, | |
281 | .bin_attrs = rio_dev_bin_attrs, | |
282 | }; | |
283 | ||
284 | const struct attribute_group *rio_dev_groups[] = { | |
285 | &rio_dev_group, | |
286 | NULL, | |
287 | }; | |
bc8fcfea | 288 | |
c9fbe769 | 289 | static ssize_t scan_store(struct bus_type *bus, const char *buf, size_t count) |
bc8fcfea AB |
290 | { |
291 | long val; | |
bc8fcfea AB |
292 | int rc; |
293 | ||
294 | if (kstrtol(buf, 0, &val) < 0) | |
295 | return -EINVAL; | |
296 | ||
297 | if (val == RIO_MPORT_ANY) { | |
298 | rc = rio_init_mports(); | |
299 | goto exit; | |
300 | } | |
301 | ||
302 | if (val < 0 || val >= RIO_MAX_MPORTS) | |
303 | return -EINVAL; | |
304 | ||
9edbc30b | 305 | rc = rio_mport_scan((int)val); |
bc8fcfea AB |
306 | exit: |
307 | if (!rc) | |
308 | rc = count; | |
309 | ||
310 | return rc; | |
311 | } | |
c9fbe769 | 312 | static BUS_ATTR_WO(scan); |
bc8fcfea | 313 | |
ed1d2da2 GKH |
314 | static struct attribute *rio_bus_attrs[] = { |
315 | &bus_attr_scan.attr, | |
316 | NULL, | |
317 | }; | |
318 | ||
319 | static const struct attribute_group rio_bus_group = { | |
320 | .attrs = rio_bus_attrs, | |
321 | }; | |
322 | ||
323 | const struct attribute_group *rio_bus_groups[] = { | |
324 | &rio_bus_group, | |
325 | NULL, | |
bc8fcfea | 326 | }; |
2aaf308b AB |
327 | |
328 | static ssize_t | |
329 | port_destid_show(struct device *dev, struct device_attribute *attr, | |
330 | char *buf) | |
331 | { | |
332 | struct rio_mport *mport = to_rio_mport(dev); | |
333 | ||
334 | if (mport) | |
335 | return sprintf(buf, "0x%04x\n", mport->host_deviceid); | |
336 | else | |
337 | return -ENODEV; | |
338 | } | |
339 | static DEVICE_ATTR_RO(port_destid); | |
340 | ||
341 | static ssize_t sys_size_show(struct device *dev, struct device_attribute *attr, | |
342 | char *buf) | |
343 | { | |
344 | struct rio_mport *mport = to_rio_mport(dev); | |
345 | ||
346 | if (mport) | |
347 | return sprintf(buf, "%u\n", mport->sys_size); | |
348 | else | |
349 | return -ENODEV; | |
350 | } | |
351 | static DEVICE_ATTR_RO(sys_size); | |
352 | ||
353 | static struct attribute *rio_mport_attrs[] = { | |
354 | &dev_attr_port_destid.attr, | |
355 | &dev_attr_sys_size.attr, | |
356 | NULL, | |
357 | }; | |
358 | ||
359 | static const struct attribute_group rio_mport_group = { | |
360 | .attrs = rio_mport_attrs, | |
361 | }; | |
362 | ||
363 | const struct attribute_group *rio_mport_groups[] = { | |
364 | &rio_mport_group, | |
365 | NULL, | |
366 | }; |