IB/ipath: Prevent random program use of diags interface
[linux-2.6] / drivers / infiniband / hw / ipath / ipath_sysfs.c
1 /*
2  * Copyright (c) 2006 QLogic, Inc. All rights reserved.
3  * Copyright (c) 2006 PathScale, Inc. All rights reserved.
4  *
5  * This software is available to you under a choice of one of two
6  * licenses.  You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the
9  * OpenIB.org BSD license below:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
19  *      - Redistributions in binary form must reproduce the above
20  *        copyright notice, this list of conditions and the following
21  *        disclaimer in the documentation and/or other materials
22  *        provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33
34 #include <linux/ctype.h>
35 #include <linux/pci.h>
36
37 #include "ipath_kernel.h"
38 #include "ipath_common.h"
39
40 /**
41  * ipath_parse_ushort - parse an unsigned short value in an arbitrary base
42  * @str: the string containing the number
43  * @valp: where to put the result
44  *
45  * returns the number of bytes consumed, or negative value on error
46  */
47 int ipath_parse_ushort(const char *str, unsigned short *valp)
48 {
49         unsigned long val;
50         char *end;
51         int ret;
52
53         if (!isdigit(str[0])) {
54                 ret = -EINVAL;
55                 goto bail;
56         }
57
58         val = simple_strtoul(str, &end, 0);
59
60         if (val > 0xffff) {
61                 ret = -EINVAL;
62                 goto bail;
63         }
64
65         *valp = val;
66
67         ret = end + 1 - str;
68         if (ret == 0)
69                 ret = -EINVAL;
70
71 bail:
72         return ret;
73 }
74
75 static ssize_t show_version(struct device_driver *dev, char *buf)
76 {
77         /* The string printed here is already newline-terminated. */
78         return scnprintf(buf, PAGE_SIZE, "%s", ib_ipath_version);
79 }
80
81 static ssize_t show_num_units(struct device_driver *dev, char *buf)
82 {
83         return scnprintf(buf, PAGE_SIZE, "%d\n",
84                          ipath_count_units(NULL, NULL, NULL));
85 }
86
87 static ssize_t show_status(struct device *dev,
88                            struct device_attribute *attr,
89                            char *buf)
90 {
91         struct ipath_devdata *dd = dev_get_drvdata(dev);
92         ssize_t ret;
93
94         if (!dd->ipath_statusp) {
95                 ret = -EINVAL;
96                 goto bail;
97         }
98
99         ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
100                         (unsigned long long) *(dd->ipath_statusp));
101
102 bail:
103         return ret;
104 }
105
106 static const char *ipath_status_str[] = {
107         "Initted",
108         "Disabled",
109         "Admin_Disabled",
110         "", /* This used to be the old "OIB_SMA" status. */
111         "", /* This used to be the old "SMA" status. */
112         "Present",
113         "IB_link_up",
114         "IB_configured",
115         "NoIBcable",
116         "Fatal_Hardware_Error",
117         NULL,
118 };
119
120 static ssize_t show_status_str(struct device *dev,
121                                struct device_attribute *attr,
122                                char *buf)
123 {
124         struct ipath_devdata *dd = dev_get_drvdata(dev);
125         int i, any;
126         u64 s;
127         ssize_t ret;
128
129         if (!dd->ipath_statusp) {
130                 ret = -EINVAL;
131                 goto bail;
132         }
133
134         s = *(dd->ipath_statusp);
135         *buf = '\0';
136         for (any = i = 0; s && ipath_status_str[i]; i++) {
137                 if (s & 1) {
138                         if (any && strlcat(buf, " ", PAGE_SIZE) >=
139                             PAGE_SIZE)
140                                 /* overflow */
141                                 break;
142                         if (strlcat(buf, ipath_status_str[i],
143                                     PAGE_SIZE) >= PAGE_SIZE)
144                                 break;
145                         any = 1;
146                 }
147                 s >>= 1;
148         }
149         if (any)
150                 strlcat(buf, "\n", PAGE_SIZE);
151
152         ret = strlen(buf);
153
154 bail:
155         return ret;
156 }
157
158 static ssize_t show_boardversion(struct device *dev,
159                                struct device_attribute *attr,
160                                char *buf)
161 {
162         struct ipath_devdata *dd = dev_get_drvdata(dev);
163         /* The string printed here is already newline-terminated. */
164         return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
165 }
166
167 static ssize_t show_lid(struct device *dev,
168                         struct device_attribute *attr,
169                         char *buf)
170 {
171         struct ipath_devdata *dd = dev_get_drvdata(dev);
172
173         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_lid);
174 }
175
176 static ssize_t store_lid(struct device *dev,
177                          struct device_attribute *attr,
178                           const char *buf,
179                           size_t count)
180 {
181         struct ipath_devdata *dd = dev_get_drvdata(dev);
182         u16 lid = 0;
183         int ret;
184
185         ret = ipath_parse_ushort(buf, &lid);
186         if (ret < 0)
187                 goto invalid;
188
189         if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE) {
190                 ret = -EINVAL;
191                 goto invalid;
192         }
193
194         ipath_set_lid(dd, lid, 0);
195
196         goto bail;
197 invalid:
198         ipath_dev_err(dd, "attempt to set invalid LID 0x%x\n", lid);
199 bail:
200         return ret;
201 }
202
203 static ssize_t show_mlid(struct device *dev,
204                          struct device_attribute *attr,
205                          char *buf)
206 {
207         struct ipath_devdata *dd = dev_get_drvdata(dev);
208
209         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_mlid);
210 }
211
212 static ssize_t store_mlid(struct device *dev,
213                          struct device_attribute *attr,
214                           const char *buf,
215                           size_t count)
216 {
217         struct ipath_devdata *dd = dev_get_drvdata(dev);
218         u16 mlid;
219         int ret;
220
221         ret = ipath_parse_ushort(buf, &mlid);
222         if (ret < 0 || mlid < IPATH_MULTICAST_LID_BASE)
223                 goto invalid;
224
225         dd->ipath_mlid = mlid;
226
227         goto bail;
228 invalid:
229         ipath_dev_err(dd, "attempt to set invalid MLID\n");
230 bail:
231         return ret;
232 }
233
234 static ssize_t show_guid(struct device *dev,
235                          struct device_attribute *attr,
236                          char *buf)
237 {
238         struct ipath_devdata *dd = dev_get_drvdata(dev);
239         u8 *guid;
240
241         guid = (u8 *) & (dd->ipath_guid);
242
243         return scnprintf(buf, PAGE_SIZE,
244                          "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
245                          guid[0], guid[1], guid[2], guid[3],
246                          guid[4], guid[5], guid[6], guid[7]);
247 }
248
249 static ssize_t store_guid(struct device *dev,
250                          struct device_attribute *attr,
251                           const char *buf,
252                           size_t count)
253 {
254         struct ipath_devdata *dd = dev_get_drvdata(dev);
255         ssize_t ret;
256         unsigned short guid[8];
257         __be64 new_guid;
258         u8 *ng;
259         int i;
260
261         if (sscanf(buf, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
262                    &guid[0], &guid[1], &guid[2], &guid[3],
263                    &guid[4], &guid[5], &guid[6], &guid[7]) != 8)
264                 goto invalid;
265
266         ng = (u8 *) &new_guid;
267
268         for (i = 0; i < 8; i++) {
269                 if (guid[i] > 0xff)
270                         goto invalid;
271                 ng[i] = guid[i];
272         }
273
274         if (new_guid == 0)
275                 goto invalid;
276
277         dd->ipath_guid = new_guid;
278         dd->ipath_nguid = 1;
279
280         ret = strlen(buf);
281         goto bail;
282
283 invalid:
284         ipath_dev_err(dd, "attempt to set invalid GUID\n");
285         ret = -EINVAL;
286
287 bail:
288         return ret;
289 }
290
291 static ssize_t show_nguid(struct device *dev,
292                           struct device_attribute *attr,
293                           char *buf)
294 {
295         struct ipath_devdata *dd = dev_get_drvdata(dev);
296
297         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_nguid);
298 }
299
300 static ssize_t show_nports(struct device *dev,
301                            struct device_attribute *attr,
302                            char *buf)
303 {
304         struct ipath_devdata *dd = dev_get_drvdata(dev);
305
306         /* Return the number of user ports available. */
307         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_cfgports - 1);
308 }
309
310 static ssize_t show_serial(struct device *dev,
311                            struct device_attribute *attr,
312                            char *buf)
313 {
314         struct ipath_devdata *dd = dev_get_drvdata(dev);
315
316         buf[sizeof dd->ipath_serial] = '\0';
317         memcpy(buf, dd->ipath_serial, sizeof dd->ipath_serial);
318         strcat(buf, "\n");
319         return strlen(buf);
320 }
321
322 static ssize_t show_unit(struct device *dev,
323                          struct device_attribute *attr,
324                          char *buf)
325 {
326         struct ipath_devdata *dd = dev_get_drvdata(dev);
327
328         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_unit);
329 }
330
331 #define DEVICE_COUNTER(name, attr) \
332         static ssize_t show_counter_##name(struct device *dev, \
333                                            struct device_attribute *attr, \
334                                            char *buf) \
335         { \
336                 struct ipath_devdata *dd = dev_get_drvdata(dev); \
337                 return scnprintf(\
338                         buf, PAGE_SIZE, "%llu\n", (unsigned long long) \
339                         ipath_snap_cntr( \
340                                 dd, offsetof(struct infinipath_counters, \
341                                              attr) / sizeof(u64)));     \
342         } \
343         static DEVICE_ATTR(name, S_IRUGO, show_counter_##name, NULL);
344
345 DEVICE_COUNTER(ib_link_downeds, IBLinkDownedCnt);
346 DEVICE_COUNTER(ib_link_err_recoveries, IBLinkErrRecoveryCnt);
347 DEVICE_COUNTER(ib_status_changes, IBStatusChangeCnt);
348 DEVICE_COUNTER(ib_symbol_errs, IBSymbolErrCnt);
349 DEVICE_COUNTER(lb_flow_stalls, LBFlowStallCnt);
350 DEVICE_COUNTER(lb_ints, LBIntCnt);
351 DEVICE_COUNTER(rx_bad_formats, RxBadFormatCnt);
352 DEVICE_COUNTER(rx_buf_ovfls, RxBufOvflCnt);
353 DEVICE_COUNTER(rx_data_pkts, RxDataPktCnt);
354 DEVICE_COUNTER(rx_dropped_pkts, RxDroppedPktCnt);
355 DEVICE_COUNTER(rx_dwords, RxDwordCnt);
356 DEVICE_COUNTER(rx_ebps, RxEBPCnt);
357 DEVICE_COUNTER(rx_flow_ctrl_errs, RxFlowCtrlErrCnt);
358 DEVICE_COUNTER(rx_flow_pkts, RxFlowPktCnt);
359 DEVICE_COUNTER(rx_icrc_errs, RxICRCErrCnt);
360 DEVICE_COUNTER(rx_len_errs, RxLenErrCnt);
361 DEVICE_COUNTER(rx_link_problems, RxLinkProblemCnt);
362 DEVICE_COUNTER(rx_lpcrc_errs, RxLPCRCErrCnt);
363 DEVICE_COUNTER(rx_max_min_len_errs, RxMaxMinLenErrCnt);
364 DEVICE_COUNTER(rx_p0_hdr_egr_ovfls, RxP0HdrEgrOvflCnt);
365 DEVICE_COUNTER(rx_p1_hdr_egr_ovfls, RxP1HdrEgrOvflCnt);
366 DEVICE_COUNTER(rx_p2_hdr_egr_ovfls, RxP2HdrEgrOvflCnt);
367 DEVICE_COUNTER(rx_p3_hdr_egr_ovfls, RxP3HdrEgrOvflCnt);
368 DEVICE_COUNTER(rx_p4_hdr_egr_ovfls, RxP4HdrEgrOvflCnt);
369 DEVICE_COUNTER(rx_p5_hdr_egr_ovfls, RxP5HdrEgrOvflCnt);
370 DEVICE_COUNTER(rx_p6_hdr_egr_ovfls, RxP6HdrEgrOvflCnt);
371 DEVICE_COUNTER(rx_p7_hdr_egr_ovfls, RxP7HdrEgrOvflCnt);
372 DEVICE_COUNTER(rx_p8_hdr_egr_ovfls, RxP8HdrEgrOvflCnt);
373 DEVICE_COUNTER(rx_pkey_mismatches, RxPKeyMismatchCnt);
374 DEVICE_COUNTER(rx_tid_full_errs, RxTIDFullErrCnt);
375 DEVICE_COUNTER(rx_tid_valid_errs, RxTIDValidErrCnt);
376 DEVICE_COUNTER(rx_vcrc_errs, RxVCRCErrCnt);
377 DEVICE_COUNTER(tx_data_pkts, TxDataPktCnt);
378 DEVICE_COUNTER(tx_dropped_pkts, TxDroppedPktCnt);
379 DEVICE_COUNTER(tx_dwords, TxDwordCnt);
380 DEVICE_COUNTER(tx_flow_pkts, TxFlowPktCnt);
381 DEVICE_COUNTER(tx_flow_stalls, TxFlowStallCnt);
382 DEVICE_COUNTER(tx_len_errs, TxLenErrCnt);
383 DEVICE_COUNTER(tx_max_min_len_errs, TxMaxMinLenErrCnt);
384 DEVICE_COUNTER(tx_underruns, TxUnderrunCnt);
385 DEVICE_COUNTER(tx_unsup_vl_errs, TxUnsupVLErrCnt);
386
387 static struct attribute *dev_counter_attributes[] = {
388         &dev_attr_ib_link_downeds.attr,
389         &dev_attr_ib_link_err_recoveries.attr,
390         &dev_attr_ib_status_changes.attr,
391         &dev_attr_ib_symbol_errs.attr,
392         &dev_attr_lb_flow_stalls.attr,
393         &dev_attr_lb_ints.attr,
394         &dev_attr_rx_bad_formats.attr,
395         &dev_attr_rx_buf_ovfls.attr,
396         &dev_attr_rx_data_pkts.attr,
397         &dev_attr_rx_dropped_pkts.attr,
398         &dev_attr_rx_dwords.attr,
399         &dev_attr_rx_ebps.attr,
400         &dev_attr_rx_flow_ctrl_errs.attr,
401         &dev_attr_rx_flow_pkts.attr,
402         &dev_attr_rx_icrc_errs.attr,
403         &dev_attr_rx_len_errs.attr,
404         &dev_attr_rx_link_problems.attr,
405         &dev_attr_rx_lpcrc_errs.attr,
406         &dev_attr_rx_max_min_len_errs.attr,
407         &dev_attr_rx_p0_hdr_egr_ovfls.attr,
408         &dev_attr_rx_p1_hdr_egr_ovfls.attr,
409         &dev_attr_rx_p2_hdr_egr_ovfls.attr,
410         &dev_attr_rx_p3_hdr_egr_ovfls.attr,
411         &dev_attr_rx_p4_hdr_egr_ovfls.attr,
412         &dev_attr_rx_p5_hdr_egr_ovfls.attr,
413         &dev_attr_rx_p6_hdr_egr_ovfls.attr,
414         &dev_attr_rx_p7_hdr_egr_ovfls.attr,
415         &dev_attr_rx_p8_hdr_egr_ovfls.attr,
416         &dev_attr_rx_pkey_mismatches.attr,
417         &dev_attr_rx_tid_full_errs.attr,
418         &dev_attr_rx_tid_valid_errs.attr,
419         &dev_attr_rx_vcrc_errs.attr,
420         &dev_attr_tx_data_pkts.attr,
421         &dev_attr_tx_dropped_pkts.attr,
422         &dev_attr_tx_dwords.attr,
423         &dev_attr_tx_flow_pkts.attr,
424         &dev_attr_tx_flow_stalls.attr,
425         &dev_attr_tx_len_errs.attr,
426         &dev_attr_tx_max_min_len_errs.attr,
427         &dev_attr_tx_underruns.attr,
428         &dev_attr_tx_unsup_vl_errs.attr,
429         NULL
430 };
431
432 static struct attribute_group dev_counter_attr_group = {
433         .name = "counters",
434         .attrs = dev_counter_attributes
435 };
436
437 static ssize_t store_reset(struct device *dev,
438                          struct device_attribute *attr,
439                           const char *buf,
440                           size_t count)
441 {
442         struct ipath_devdata *dd = dev_get_drvdata(dev);
443         int ret;
444
445         if (count < 5 || memcmp(buf, "reset", 5)) {
446                 ret = -EINVAL;
447                 goto bail;
448         }
449
450         if (dd->ipath_flags & IPATH_DISABLED) {
451                 /*
452                  * post-reset init would re-enable interrupts, etc.
453                  * so don't allow reset on disabled devices.  Not
454                  * perfect error, but about the best choice.
455                  */
456                 dev_info(dev,"Unit %d is disabled, can't reset\n",
457                          dd->ipath_unit);
458                 ret = -EINVAL;
459         }
460         ret = ipath_reset_device(dd->ipath_unit);
461 bail:
462         return ret<0 ? ret : count;
463 }
464
465 static ssize_t store_link_state(struct device *dev,
466                          struct device_attribute *attr,
467                           const char *buf,
468                           size_t count)
469 {
470         struct ipath_devdata *dd = dev_get_drvdata(dev);
471         int ret, r;
472         u16 state;
473
474         ret = ipath_parse_ushort(buf, &state);
475         if (ret < 0)
476                 goto invalid;
477
478         r = ipath_set_linkstate(dd, state);
479         if (r < 0) {
480                 ret = r;
481                 goto bail;
482         }
483
484         goto bail;
485 invalid:
486         ipath_dev_err(dd, "attempt to set invalid link state\n");
487 bail:
488         return ret;
489 }
490
491 static ssize_t show_mtu(struct device *dev,
492                          struct device_attribute *attr,
493                          char *buf)
494 {
495         struct ipath_devdata *dd = dev_get_drvdata(dev);
496         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_ibmtu);
497 }
498
499 static ssize_t store_mtu(struct device *dev,
500                          struct device_attribute *attr,
501                           const char *buf,
502                           size_t count)
503 {
504         struct ipath_devdata *dd = dev_get_drvdata(dev);
505         ssize_t ret;
506         u16 mtu = 0;
507         int r;
508
509         ret = ipath_parse_ushort(buf, &mtu);
510         if (ret < 0)
511                 goto invalid;
512
513         r = ipath_set_mtu(dd, mtu);
514         if (r < 0)
515                 ret = r;
516
517         goto bail;
518 invalid:
519         ipath_dev_err(dd, "attempt to set invalid MTU\n");
520 bail:
521         return ret;
522 }
523
524 static ssize_t show_enabled(struct device *dev,
525                          struct device_attribute *attr,
526                          char *buf)
527 {
528         struct ipath_devdata *dd = dev_get_drvdata(dev);
529         return scnprintf(buf, PAGE_SIZE, "%u\n",
530                          (dd->ipath_flags & IPATH_DISABLED) ? 0 : 1);
531 }
532
533 static ssize_t store_enabled(struct device *dev,
534                          struct device_attribute *attr,
535                           const char *buf,
536                           size_t count)
537 {
538         struct ipath_devdata *dd = dev_get_drvdata(dev);
539         ssize_t ret;
540         u16 enable = 0;
541
542         ret = ipath_parse_ushort(buf, &enable);
543         if (ret < 0) {
544                 ipath_dev_err(dd, "attempt to use non-numeric on enable\n");
545                 goto bail;
546         }
547
548         if (enable) {
549                 if (!(dd->ipath_flags & IPATH_DISABLED))
550                         goto bail;
551
552                 dev_info(dev, "Enabling unit %d\n", dd->ipath_unit);
553                 /* same as post-reset */
554                 ret = ipath_init_chip(dd, 1);
555                 if (ret)
556                         ipath_dev_err(dd, "Failed to enable unit %d\n",
557                                       dd->ipath_unit);
558                 else {
559                         dd->ipath_flags &= ~IPATH_DISABLED;
560                         *dd->ipath_statusp &= ~IPATH_STATUS_ADMIN_DISABLED;
561                 }
562         }
563         else if (!(dd->ipath_flags & IPATH_DISABLED)) {
564                 dev_info(dev, "Disabling unit %d\n", dd->ipath_unit);
565                 ipath_shutdown_device(dd);
566                 dd->ipath_flags |= IPATH_DISABLED;
567                 *dd->ipath_statusp |= IPATH_STATUS_ADMIN_DISABLED;
568         }
569
570 bail:
571         return ret;
572 }
573
574 static ssize_t store_rx_pol_inv(struct device *dev,
575                           struct device_attribute *attr,
576                           const char *buf,
577                           size_t count)
578 {
579         struct ipath_devdata *dd = dev_get_drvdata(dev);
580         int ret, r;
581         u16 val;
582
583         ret = ipath_parse_ushort(buf, &val);
584         if (ret < 0)
585                 goto invalid;
586
587         r = ipath_set_rx_pol_inv(dd, val);
588         if (r < 0) {
589                 ret = r;
590                 goto bail;
591         }
592
593         goto bail;
594 invalid:
595         ipath_dev_err(dd, "attempt to set invalid Rx Polarity invert\n");
596 bail:
597         return ret;
598 }
599
600
601 static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
602 static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);
603
604 static struct attribute *driver_attributes[] = {
605         &driver_attr_num_units.attr,
606         &driver_attr_version.attr,
607         NULL
608 };
609
610 static struct attribute_group driver_attr_group = {
611         .attrs = driver_attributes
612 };
613
614 static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
615 static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
616 static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
617 static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
618 static DEVICE_ATTR(mtu, S_IWUSR | S_IRUGO, show_mtu, store_mtu);
619 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO, show_enabled, store_enabled);
620 static DEVICE_ATTR(nguid, S_IRUGO, show_nguid, NULL);
621 static DEVICE_ATTR(nports, S_IRUGO, show_nports, NULL);
622 static DEVICE_ATTR(reset, S_IWUSR, NULL, store_reset);
623 static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
624 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
625 static DEVICE_ATTR(status_str, S_IRUGO, show_status_str, NULL);
626 static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
627 static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
628 static DEVICE_ATTR(rx_pol_inv, S_IWUSR, NULL, store_rx_pol_inv);
629
630 static struct attribute *dev_attributes[] = {
631         &dev_attr_guid.attr,
632         &dev_attr_lid.attr,
633         &dev_attr_link_state.attr,
634         &dev_attr_mlid.attr,
635         &dev_attr_mtu.attr,
636         &dev_attr_nguid.attr,
637         &dev_attr_nports.attr,
638         &dev_attr_serial.attr,
639         &dev_attr_status.attr,
640         &dev_attr_status_str.attr,
641         &dev_attr_boardversion.attr,
642         &dev_attr_unit.attr,
643         &dev_attr_enabled.attr,
644         &dev_attr_rx_pol_inv.attr,
645         NULL
646 };
647
648 static struct attribute_group dev_attr_group = {
649         .attrs = dev_attributes
650 };
651
652 /**
653  * ipath_expose_reset - create a device reset file
654  * @dev: the device structure
655  *
656  * Only expose a file that lets us reset the device after someone
657  * enters diag mode.  A device reset is quite likely to crash the
658  * machine entirely, so we don't want to normally make it
659  * available.
660  *
661  * Called with ipath_mutex held.
662  */
663 int ipath_expose_reset(struct device *dev)
664 {
665         static int exposed;
666         int ret;
667
668         if (!exposed) {
669                 ret = device_create_file(dev, &dev_attr_reset);
670                 exposed = 1;
671         }
672         else
673                 ret = 0;
674
675         return ret;
676 }
677
678 int ipath_driver_create_group(struct device_driver *drv)
679 {
680         int ret;
681
682         ret = sysfs_create_group(&drv->kobj, &driver_attr_group);
683
684         return ret;
685 }
686
687 void ipath_driver_remove_group(struct device_driver *drv)
688 {
689         sysfs_remove_group(&drv->kobj, &driver_attr_group);
690 }
691
692 int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
693 {
694         int ret;
695         char unit[5];
696
697         ret = sysfs_create_group(&dev->kobj, &dev_attr_group);
698         if (ret)
699                 goto bail;
700
701         ret = sysfs_create_group(&dev->kobj, &dev_counter_attr_group);
702         if (ret)
703                 goto bail_attrs;
704
705         snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
706         ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj, unit);
707         if (ret == 0)
708                 goto bail;
709
710         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
711 bail_attrs:
712         sysfs_remove_group(&dev->kobj, &dev_attr_group);
713 bail:
714         return ret;
715 }
716
717 void ipath_device_remove_group(struct device *dev, struct ipath_devdata *dd)
718 {
719         char unit[5];
720
721         snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
722         sysfs_remove_link(&dev->driver->kobj, unit);
723
724         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
725         sysfs_remove_group(&dev->kobj, &dev_attr_group);
726
727         device_remove_file(dev, &dev_attr_reset);
728 }