1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * zfcp device driver
4 *
5 * sysfs attributes.
6 *
7 * Copyright IBM Corp. 2008, 2020
8 */
9
10 #define pr_fmt(fmt) "zfcp: " fmt
11
12 #include <linux/slab.h>
13 #include "zfcp_diag.h"
14 #include "zfcp_ext.h"
15
16 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
17 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
18 _show, _store)
19 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
20 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
21 struct device_attribute *at,\
22 char *buf) \
23 { \
24 struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
25 \
26 return sysfs_emit(buf, _format, _value); \
27 } \
28 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
29 zfcp_sysfs_##_feat##_##_name##_show, NULL);
30
31 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value) \
32 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
33 struct device_attribute *at,\
34 char *buf) \
35 { \
36 return sysfs_emit(buf, _format, _value); \
37 } \
38 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
39 zfcp_sysfs_##_feat##_##_name##_show, NULL);
40
41 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
42 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
43 struct device_attribute *at,\
44 char *buf) \
45 { \
46 struct ccw_device *cdev = to_ccwdev(dev); \
47 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); \
48 int i; \
49 \
50 if (!adapter) \
51 return -ENODEV; \
52 \
53 i = sysfs_emit(buf, _format, _value); \
54 zfcp_ccw_adapter_put(adapter); \
55 return i; \
56 } \
57 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
58 zfcp_sysfs_adapter_##_name##_show, NULL);
59
60 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
61 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
62 (unsigned long long) adapter->peer_wwnn);
63 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
64 (unsigned long long) adapter->peer_wwpn);
65 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
66 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
67 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
68 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
69 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
70 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
71
72 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
73 atomic_read(&port->status));
74 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
75 (atomic_read(&port->status) &
76 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
77 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
78
79 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
80 zfcp_unit_sdev_status(unit));
81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
82 (zfcp_unit_sdev_status(unit) &
83 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
84 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
85 (zfcp_unit_sdev_status(unit) &
86 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
87 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
88 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
89
zfcp_sysfs_port_failed_show(struct device * dev,struct device_attribute * attr,char * buf)90 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
91 struct device_attribute *attr,
92 char *buf)
93 {
94 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
95
96 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
97 return sysfs_emit(buf, "1\n");
98
99 return sysfs_emit(buf, "0\n");
100 }
101
zfcp_sysfs_port_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)102 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
103 struct device_attribute *attr,
104 const char *buf, size_t count)
105 {
106 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
107 unsigned long val;
108
109 if (kstrtoul(buf, 0, &val) || val != 0)
110 return -EINVAL;
111
112 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
113 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
114 zfcp_erp_wait(port->adapter);
115
116 return count;
117 }
118 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
119 zfcp_sysfs_port_failed_show,
120 zfcp_sysfs_port_failed_store);
121
zfcp_sysfs_unit_failed_show(struct device * dev,struct device_attribute * attr,char * buf)122 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
123 struct device_attribute *attr,
124 char *buf)
125 {
126 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
127 struct scsi_device *sdev;
128 unsigned int status, failed = 1;
129
130 sdev = zfcp_unit_sdev(unit);
131 if (sdev) {
132 status = atomic_read(&sdev_to_zfcp(sdev)->status);
133 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
134 scsi_device_put(sdev);
135 }
136
137 return sysfs_emit(buf, "%d\n", failed);
138 }
139
zfcp_sysfs_unit_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)140 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
141 struct device_attribute *attr,
142 const char *buf, size_t count)
143 {
144 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
145 unsigned long val;
146 struct scsi_device *sdev;
147
148 if (kstrtoul(buf, 0, &val) || val != 0)
149 return -EINVAL;
150
151 sdev = zfcp_unit_sdev(unit);
152 if (sdev) {
153 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
154 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
155 "syufai2");
156 zfcp_erp_wait(unit->port->adapter);
157 } else
158 zfcp_unit_scsi_scan(unit);
159
160 return count;
161 }
162 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
163 zfcp_sysfs_unit_failed_show,
164 zfcp_sysfs_unit_failed_store);
165
zfcp_sysfs_adapter_failed_show(struct device * dev,struct device_attribute * attr,char * buf)166 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
167 struct device_attribute *attr,
168 char *buf)
169 {
170 struct ccw_device *cdev = to_ccwdev(dev);
171 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
172 int i;
173
174 if (!adapter)
175 return -ENODEV;
176
177 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
178 i = sysfs_emit(buf, "1\n");
179 else
180 i = sysfs_emit(buf, "0\n");
181
182 zfcp_ccw_adapter_put(adapter);
183 return i;
184 }
185
zfcp_sysfs_adapter_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)186 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
187 struct device_attribute *attr,
188 const char *buf, size_t count)
189 {
190 struct ccw_device *cdev = to_ccwdev(dev);
191 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
192 unsigned long val;
193 int retval = 0;
194
195 if (!adapter)
196 return -ENODEV;
197
198 if (kstrtoul(buf, 0, &val) || val != 0) {
199 retval = -EINVAL;
200 goto out;
201 }
202
203 zfcp_erp_adapter_reset_sync(adapter, "syafai2");
204 out:
205 zfcp_ccw_adapter_put(adapter);
206 return retval ? retval : (ssize_t) count;
207 }
208 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
209 zfcp_sysfs_adapter_failed_show,
210 zfcp_sysfs_adapter_failed_store);
211
zfcp_sysfs_port_rescan_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)212 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
213 struct device_attribute *attr,
214 const char *buf, size_t count)
215 {
216 struct ccw_device *cdev = to_ccwdev(dev);
217 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
218 int retval = 0;
219
220 if (!adapter)
221 return -ENODEV;
222
223 /*
224 * If `scsi_host` is missing, we can't schedule `scan_work`, as it
225 * makes use of the corresponding fc_host object. But this state is
226 * only possible if xconfig/xport data has never completed yet,
227 * and we couldn't successfully scan for ports anyway.
228 */
229 if (adapter->scsi_host == NULL) {
230 retval = -ENODEV;
231 goto out;
232 }
233
234 /*
235 * Users wish is our command: immediately schedule and flush a
236 * worker to conduct a synchronous port scan, that is, neither
237 * a random delay nor a rate limit is applied here.
238 */
239 queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
240 flush_delayed_work(&adapter->scan_work);
241 out:
242 zfcp_ccw_adapter_put(adapter);
243 return retval ? retval : (ssize_t) count;
244 }
245 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
246 zfcp_sysfs_port_rescan_store);
247
248 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
249
zfcp_sysfs_port_set_removing(struct zfcp_port * const port)250 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
251 {
252 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
253 atomic_set(&port->units, -1);
254 }
255
zfcp_sysfs_port_is_removing(const struct zfcp_port * const port)256 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
257 {
258 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
259 return atomic_read(&port->units) == -1;
260 }
261
zfcp_sysfs_port_in_use(struct zfcp_port * const port)262 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
263 {
264 struct zfcp_adapter *const adapter = port->adapter;
265 unsigned long flags;
266 struct scsi_device *sdev;
267 bool in_use = true;
268
269 mutex_lock(&zfcp_sysfs_port_units_mutex);
270 if (atomic_read(&port->units) > 0)
271 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
272
273 spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
274 __shost_for_each_device(sdev, adapter->scsi_host) {
275 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
276
277 if (sdev->sdev_state == SDEV_DEL ||
278 sdev->sdev_state == SDEV_CANCEL)
279 continue;
280 if (zsdev->port != port)
281 continue;
282 /* alive scsi_device under port of interest */
283 goto unlock_host_lock;
284 }
285
286 /* port is about to be removed, so no more unit_add or sdev_init */
287 zfcp_sysfs_port_set_removing(port);
288 in_use = false;
289
290 unlock_host_lock:
291 spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
292 unlock_port_units_mutex:
293 mutex_unlock(&zfcp_sysfs_port_units_mutex);
294 return in_use;
295 }
296
zfcp_sysfs_port_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)297 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
298 struct device_attribute *attr,
299 const char *buf, size_t count)
300 {
301 struct ccw_device *cdev = to_ccwdev(dev);
302 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
303 struct zfcp_port *port;
304 u64 wwpn;
305 int retval = -EINVAL;
306
307 if (!adapter)
308 return -ENODEV;
309
310 if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
311 goto out;
312
313 port = zfcp_get_port_by_wwpn(adapter, wwpn);
314 if (!port)
315 goto out;
316 else
317 retval = 0;
318
319 if (zfcp_sysfs_port_in_use(port)) {
320 retval = -EBUSY;
321 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
322 goto out;
323 }
324
325 write_lock_irq(&adapter->port_list_lock);
326 list_del(&port->list);
327 write_unlock_irq(&adapter->port_list_lock);
328
329 zfcp_erp_port_shutdown(port, 0, "syprs_1");
330 device_unregister(&port->dev);
331
332 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
333 out:
334 zfcp_ccw_adapter_put(adapter);
335 return retval ? retval : (ssize_t) count;
336 }
337 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
338 zfcp_sysfs_port_remove_store);
339
340 static ssize_t
zfcp_sysfs_adapter_diag_max_age_show(struct device * dev,struct device_attribute * attr,char * buf)341 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
342 struct device_attribute *attr, char *buf)
343 {
344 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
345 ssize_t rc;
346
347 if (!adapter)
348 return -ENODEV;
349
350 rc = sysfs_emit(buf, "%lu\n", adapter->diagnostics->max_age);
351
352 zfcp_ccw_adapter_put(adapter);
353 return rc;
354 }
355
356 static ssize_t
zfcp_sysfs_adapter_diag_max_age_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)357 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
358 struct device_attribute *attr,
359 const char *buf, size_t count)
360 {
361 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
362 unsigned long max_age;
363 ssize_t rc;
364
365 if (!adapter)
366 return -ENODEV;
367
368 rc = kstrtoul(buf, 10, &max_age);
369 if (rc != 0)
370 goto out;
371
372 adapter->diagnostics->max_age = max_age;
373
374 rc = count;
375 out:
376 zfcp_ccw_adapter_put(adapter);
377 return rc;
378 }
379 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
380 zfcp_sysfs_adapter_diag_max_age_show,
381 zfcp_sysfs_adapter_diag_max_age_store);
382
zfcp_sysfs_adapter_fc_security_show(struct device * dev,struct device_attribute * attr,char * buf)383 static ssize_t zfcp_sysfs_adapter_fc_security_show(
384 struct device *dev, struct device_attribute *attr, char *buf)
385 {
386 struct ccw_device *cdev = to_ccwdev(dev);
387 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
388 unsigned int status;
389 int i;
390
391 if (!adapter)
392 return -ENODEV;
393
394 /*
395 * Adapter status COMMON_OPEN implies xconf data and xport data
396 * was done. Adapter FC Endpoint Security capability remains
397 * unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
398 * down).
399 */
400 status = atomic_read(&adapter->status);
401 if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
402 i = sysfs_emit(buf, "unknown\n");
403 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
404 i = sysfs_emit(buf, "unsupported\n");
405 else {
406 i = zfcp_fsf_scnprint_fc_security(
407 buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
408 ZFCP_FSF_PRINT_FMT_LIST);
409 i += sysfs_emit_at(buf, i, "\n");
410 }
411
412 zfcp_ccw_adapter_put(adapter);
413 return i;
414 }
415 static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
416 zfcp_sysfs_adapter_fc_security_show,
417 NULL);
418
419 static struct attribute *zfcp_adapter_attrs[] = {
420 &dev_attr_adapter_failed.attr,
421 &dev_attr_adapter_in_recovery.attr,
422 &dev_attr_adapter_port_remove.attr,
423 &dev_attr_adapter_port_rescan.attr,
424 &dev_attr_adapter_peer_wwnn.attr,
425 &dev_attr_adapter_peer_wwpn.attr,
426 &dev_attr_adapter_peer_d_id.attr,
427 &dev_attr_adapter_card_version.attr,
428 &dev_attr_adapter_lic_version.attr,
429 &dev_attr_adapter_status.attr,
430 &dev_attr_adapter_hardware_version.attr,
431 &dev_attr_adapter_diag_max_age.attr,
432 &dev_attr_adapter_fc_security.attr,
433 NULL
434 };
435
436 static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
437 .attrs = zfcp_adapter_attrs,
438 };
439
zfcp_sysfs_unit_add_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)440 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
441 struct device_attribute *attr,
442 const char *buf, size_t count)
443 {
444 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
445 u64 fcp_lun;
446 int retval;
447
448 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
449 return -EINVAL;
450
451 flush_work(&port->rport_work);
452
453 retval = zfcp_unit_add(port, fcp_lun);
454 if (retval)
455 return retval;
456
457 return count;
458 }
459 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
460
zfcp_sysfs_unit_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)461 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
462 struct device_attribute *attr,
463 const char *buf, size_t count)
464 {
465 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
466 u64 fcp_lun;
467
468 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
469 return -EINVAL;
470
471 if (zfcp_unit_remove(port, fcp_lun))
472 return -EINVAL;
473
474 return count;
475 }
476 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
477
zfcp_sysfs_port_fc_security_show(struct device * dev,struct device_attribute * attr,char * buf)478 static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
479 struct device_attribute *attr,
480 char *buf)
481 {
482 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
483 struct zfcp_adapter *adapter = port->adapter;
484 unsigned int status = atomic_read(&port->status);
485 int i;
486
487 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
488 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
489 0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
490 0 != (status & ZFCP_STATUS_PORT_LINK_TEST) ||
491 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
492 0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
493 i = sysfs_emit(buf, "unknown\n");
494 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
495 i = sysfs_emit(buf, "unsupported\n");
496 else {
497 i = zfcp_fsf_scnprint_fc_security(
498 buf, PAGE_SIZE - 1, port->connection_info,
499 ZFCP_FSF_PRINT_FMT_SINGLEITEM);
500 i += sysfs_emit_at(buf, i, "\n");
501 }
502
503 return i;
504 }
505 static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
506 zfcp_sysfs_port_fc_security_show,
507 NULL);
508
509 static struct attribute *zfcp_port_attrs[] = {
510 &dev_attr_unit_add.attr,
511 &dev_attr_unit_remove.attr,
512 &dev_attr_port_failed.attr,
513 &dev_attr_port_in_recovery.attr,
514 &dev_attr_port_status.attr,
515 &dev_attr_port_access_denied.attr,
516 &dev_attr_port_fc_security.attr,
517 NULL
518 };
519 static struct attribute_group zfcp_port_attr_group = {
520 .attrs = zfcp_port_attrs,
521 };
522 const struct attribute_group *zfcp_port_attr_groups[] = {
523 &zfcp_port_attr_group,
524 NULL,
525 };
526
527 static struct attribute *zfcp_unit_attrs[] = {
528 &dev_attr_unit_failed.attr,
529 &dev_attr_unit_in_recovery.attr,
530 &dev_attr_unit_status.attr,
531 &dev_attr_unit_access_denied.attr,
532 &dev_attr_unit_access_shared.attr,
533 &dev_attr_unit_access_readonly.attr,
534 NULL
535 };
536 static struct attribute_group zfcp_unit_attr_group = {
537 .attrs = zfcp_unit_attrs,
538 };
539 const struct attribute_group *zfcp_unit_attr_groups[] = {
540 &zfcp_unit_attr_group,
541 NULL,
542 };
543
544 #define ZFCP_DEFINE_LATENCY_ATTR(_name) \
545 static ssize_t \
546 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
547 struct device_attribute *attr, \
548 char *buf) { \
549 struct scsi_device *sdev = to_scsi_device(dev); \
550 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
551 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
552 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; \
553 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
554 \
555 spin_lock_bh(&lat->lock); \
556 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
557 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
558 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
559 csum = lat->_name.channel.sum * adapter->timer_ticks; \
560 cmin = lat->_name.channel.min * adapter->timer_ticks; \
561 cmax = lat->_name.channel.max * adapter->timer_ticks; \
562 cc = lat->_name.counter; \
563 spin_unlock_bh(&lat->lock); \
564 \
565 do_div(fsum, 1000); \
566 do_div(fmin, 1000); \
567 do_div(fmax, 1000); \
568 do_div(csum, 1000); \
569 do_div(cmin, 1000); \
570 do_div(cmax, 1000); \
571 \
572 return sysfs_emit(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
573 fmin, fmax, fsum, cmin, cmax, csum, cc); \
574 } \
575 static ssize_t \
576 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
577 struct device_attribute *attr, \
578 const char *buf, size_t count) \
579 { \
580 struct scsi_device *sdev = to_scsi_device(dev); \
581 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
582 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
583 unsigned long flags; \
584 \
585 spin_lock_irqsave(&lat->lock, flags); \
586 lat->_name.fabric.sum = 0; \
587 lat->_name.fabric.min = 0xFFFFFFFF; \
588 lat->_name.fabric.max = 0; \
589 lat->_name.channel.sum = 0; \
590 lat->_name.channel.min = 0xFFFFFFFF; \
591 lat->_name.channel.max = 0; \
592 lat->_name.counter = 0; \
593 spin_unlock_irqrestore(&lat->lock, flags); \
594 \
595 return (ssize_t) count; \
596 } \
597 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
598 zfcp_sysfs_unit_##_name##_latency_show, \
599 zfcp_sysfs_unit_##_name##_latency_store);
600
601 ZFCP_DEFINE_LATENCY_ATTR(read);
602 ZFCP_DEFINE_LATENCY_ATTR(write);
603 ZFCP_DEFINE_LATENCY_ATTR(cmd);
604
605 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
606 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
607 struct device_attribute *attr,\
608 char *buf) \
609 { \
610 struct scsi_device *sdev = to_scsi_device(dev); \
611 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
612 \
613 return sysfs_emit(buf, _format, _value); \
614 } \
615 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
616
617 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
618 dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
619 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
620 (unsigned long long) zfcp_sdev->port->wwpn);
621
zfcp_sysfs_scsi_fcp_lun_show(struct device * dev,struct device_attribute * attr,char * buf)622 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
623 struct device_attribute *attr,
624 char *buf)
625 {
626 struct scsi_device *sdev = to_scsi_device(dev);
627
628 return sysfs_emit(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
629 }
630 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
631
632 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
633 (atomic_read(&zfcp_sdev->status) &
634 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
635
zfcp_sysfs_scsi_zfcp_failed_show(struct device * dev,struct device_attribute * attr,char * buf)636 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
637 struct device_attribute *attr,
638 char *buf)
639 {
640 struct scsi_device *sdev = to_scsi_device(dev);
641 unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
642 unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
643
644 return sysfs_emit(buf, "%d\n", failed);
645 }
646
zfcp_sysfs_scsi_zfcp_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)647 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
648 struct device_attribute *attr,
649 const char *buf, size_t count)
650 {
651 struct scsi_device *sdev = to_scsi_device(dev);
652 unsigned long val;
653
654 if (kstrtoul(buf, 0, &val) || val != 0)
655 return -EINVAL;
656
657 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
658 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
659 "syufai3");
660 zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
661
662 return count;
663 }
664 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
665 zfcp_sysfs_scsi_zfcp_failed_show,
666 zfcp_sysfs_scsi_zfcp_failed_store);
667
668 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
669 (atomic_read(&zfcp_sdev->status) &
670 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
671
672 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
673 atomic_read(&zfcp_sdev->status));
674
675 static struct attribute *zfcp_sdev_attrs[] = {
676 &dev_attr_fcp_lun.attr,
677 &dev_attr_wwpn.attr,
678 &dev_attr_hba_id.attr,
679 &dev_attr_read_latency.attr,
680 &dev_attr_write_latency.attr,
681 &dev_attr_cmd_latency.attr,
682 &dev_attr_zfcp_access_denied.attr,
683 &dev_attr_zfcp_failed.attr,
684 &dev_attr_zfcp_in_recovery.attr,
685 &dev_attr_zfcp_status.attr,
686 NULL
687 };
688
689 static const struct attribute_group zfcp_sysfs_sdev_attr_group = {
690 .attrs = zfcp_sdev_attrs
691 };
692
693 const struct attribute_group *zfcp_sysfs_sdev_attr_groups[] = {
694 &zfcp_sysfs_sdev_attr_group,
695 NULL
696 };
697
zfcp_sysfs_adapter_util_show(struct device * dev,struct device_attribute * attr,char * buf)698 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
699 struct device_attribute *attr,
700 char *buf)
701 {
702 struct Scsi_Host *scsi_host = dev_to_shost(dev);
703 struct fsf_qtcb_bottom_port *qtcb_port;
704 struct zfcp_adapter *adapter;
705 int retval;
706
707 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
708 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
709 return -EOPNOTSUPP;
710
711 qtcb_port = kzalloc_obj(struct fsf_qtcb_bottom_port);
712 if (!qtcb_port)
713 return -ENOMEM;
714
715 retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
716 if (retval == 0 || retval == -EAGAIN)
717 retval = sysfs_emit(buf, "%u %u %u\n", qtcb_port->cp_util,
718 qtcb_port->cb_util, qtcb_port->a_util);
719 kfree(qtcb_port);
720 return retval;
721 }
722 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
723
zfcp_sysfs_adapter_ex_config(struct device * dev,struct fsf_statistics_info * stat_inf)724 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
725 struct fsf_statistics_info *stat_inf)
726 {
727 struct Scsi_Host *scsi_host = dev_to_shost(dev);
728 struct fsf_qtcb_bottom_config *qtcb_config;
729 struct zfcp_adapter *adapter;
730 int retval;
731
732 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
733 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
734 return -EOPNOTSUPP;
735
736 qtcb_config = kzalloc_obj(struct fsf_qtcb_bottom_config);
737 if (!qtcb_config)
738 return -ENOMEM;
739
740 retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
741 if (retval == 0 || retval == -EAGAIN)
742 *stat_inf = qtcb_config->stat_info;
743
744 kfree(qtcb_config);
745 return retval;
746 }
747
748 #define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
749 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
750 struct device_attribute *attr,\
751 char *buf) \
752 { \
753 struct fsf_statistics_info stat_info; \
754 int retval; \
755 \
756 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
757 if (retval) \
758 return retval; \
759 \
760 return sysfs_emit(buf, _format, ## _arg); \
761 } \
762 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
763
764 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
765 (unsigned long long) stat_info.input_req,
766 (unsigned long long) stat_info.output_req,
767 (unsigned long long) stat_info.control_req);
768
769 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
770 (unsigned long long) stat_info.input_mb,
771 (unsigned long long) stat_info.output_mb);
772
773 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
774 (unsigned long long) stat_info.seconds_act);
775
zfcp_sysfs_adapter_q_full_show(struct device * dev,struct device_attribute * attr,char * buf)776 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
777 struct device_attribute *attr,
778 char *buf)
779 {
780 struct Scsi_Host *scsi_host = class_to_shost(dev);
781 struct zfcp_qdio *qdio =
782 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
783 u64 util;
784
785 spin_lock_bh(&qdio->stat_lock);
786 util = qdio->req_q_util;
787 spin_unlock_bh(&qdio->stat_lock);
788
789 return sysfs_emit(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
790 (unsigned long long)util);
791 }
792 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
793
794 static struct attribute *zfcp_sysfs_shost_attrs[] = {
795 &dev_attr_utilization.attr,
796 &dev_attr_requests.attr,
797 &dev_attr_megabytes.attr,
798 &dev_attr_seconds_active.attr,
799 &dev_attr_queue_full.attr,
800 NULL
801 };
802
803 static const struct attribute_group zfcp_sysfs_shost_attr_group = {
804 .attrs = zfcp_sysfs_shost_attrs
805 };
806
807 const struct attribute_group *zfcp_sysfs_shost_attr_groups[] = {
808 &zfcp_sysfs_shost_attr_group,
809 NULL
810 };
811
zfcp_sysfs_adapter_diag_b2b_credit_show(struct device * dev,struct device_attribute * attr,char * buf)812 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
813 struct device *dev, struct device_attribute *attr, char *buf)
814 {
815 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
816 struct zfcp_diag_header *diag_hdr;
817 struct fc_els_flogi *nsp;
818 ssize_t rc = -ENOLINK;
819 unsigned long flags;
820 unsigned int status;
821
822 if (!adapter)
823 return -ENODEV;
824
825 status = atomic_read(&adapter->status);
826 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
827 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
828 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
829 goto out;
830
831 diag_hdr = &adapter->diagnostics->config_data.header;
832
833 rc = zfcp_diag_update_buffer_limited(
834 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
835 if (rc != 0)
836 goto out;
837
838 spin_lock_irqsave(&diag_hdr->access_lock, flags);
839 /* nport_serv_param doesn't contain the ELS_Command code */
840 nsp = (struct fc_els_flogi *)((unsigned long)
841 adapter->diagnostics->config_data
842 .data.nport_serv_param -
843 sizeof(u32));
844
845 rc = sysfs_emit(buf, "%hu\n", be16_to_cpu(nsp->fl_csp.sp_bb_cred));
846 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
847
848 out:
849 zfcp_ccw_adapter_put(adapter);
850 return rc;
851 }
852 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
853 zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
854
855 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtfmt) \
856 static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show( \
857 struct device *dev, struct device_attribute *attr, char *buf) \
858 { \
859 struct zfcp_adapter *const adapter = \
860 zfcp_ccw_adapter_by_cdev(to_ccwdev(dev)); \
861 struct zfcp_diag_header *diag_hdr; \
862 ssize_t rc = -ENOLINK; \
863 unsigned long flags; \
864 unsigned int status; \
865 \
866 if (!adapter) \
867 return -ENODEV; \
868 \
869 status = atomic_read(&adapter->status); \
870 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) || \
871 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) || \
872 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED)) \
873 goto out; \
874 \
875 if (!zfcp_diag_support_sfp(adapter)) { \
876 rc = -EOPNOTSUPP; \
877 goto out; \
878 } \
879 \
880 diag_hdr = &adapter->diagnostics->port_data.header; \
881 \
882 rc = zfcp_diag_update_buffer_limited( \
883 adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
884 if (rc != 0) \
885 goto out; \
886 \
887 spin_lock_irqsave(&diag_hdr->access_lock, flags); \
888 rc = sysfs_emit( \
889 buf, _prtfmt "\n", \
890 adapter->diagnostics->port_data.data._qtcb_member); \
891 spin_unlock_irqrestore(&diag_hdr->access_lock, flags); \
892 \
893 out: \
894 zfcp_ccw_adapter_put(adapter); \
895 return rc; \
896 } \
897 static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400, \
898 zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
899
900 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, "%hd");
901 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, "%hu");
902 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, "%hu");
903 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, "%hu");
904 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, "%hu");
905 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, "%hu");
906 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, "%hu");
907 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, "%hu");
908 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, "%hu");
909 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, "%hu");
910
911 static struct attribute *zfcp_sysfs_diag_attrs[] = {
912 &dev_attr_adapter_diag_sfp_temperature.attr,
913 &dev_attr_adapter_diag_sfp_vcc.attr,
914 &dev_attr_adapter_diag_sfp_tx_bias.attr,
915 &dev_attr_adapter_diag_sfp_tx_power.attr,
916 &dev_attr_adapter_diag_sfp_rx_power.attr,
917 &dev_attr_adapter_diag_sfp_port_tx_type.attr,
918 &dev_attr_adapter_diag_sfp_optical_port.attr,
919 &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
920 &dev_attr_adapter_diag_sfp_connector_type.attr,
921 &dev_attr_adapter_diag_sfp_fec_active.attr,
922 &dev_attr_adapter_diag_b2b_credit.attr,
923 NULL,
924 };
925
926 static const struct attribute_group zfcp_sysfs_diag_attr_group = {
927 .name = "diagnostics",
928 .attrs = zfcp_sysfs_diag_attrs,
929 };
930
931 const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
932 &zfcp_sysfs_adapter_attr_group,
933 &zfcp_sysfs_diag_attr_group,
934 NULL,
935 };
936