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 KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/slab.h>
14 #include "zfcp_diag.h"
15 #include "zfcp_ext.h"
16
17 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
18 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
19 _show, _store)
20 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
21 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
22 struct device_attribute *at,\
23 char *buf) \
24 { \
25 struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
26 \
27 return sprintf(buf, _format, _value); \
28 } \
29 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
30 zfcp_sysfs_##_feat##_##_name##_show, NULL);
31
32 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value) \
33 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
34 struct device_attribute *at,\
35 char *buf) \
36 { \
37 return sprintf(buf, _format, _value); \
38 } \
39 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
40 zfcp_sysfs_##_feat##_##_name##_show, NULL);
41
42 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
43 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
44 struct device_attribute *at,\
45 char *buf) \
46 { \
47 struct ccw_device *cdev = to_ccwdev(dev); \
48 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); \
49 int i; \
50 \
51 if (!adapter) \
52 return -ENODEV; \
53 \
54 i = sprintf(buf, _format, _value); \
55 zfcp_ccw_adapter_put(adapter); \
56 return i; \
57 } \
58 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
59 zfcp_sysfs_adapter_##_name##_show, NULL);
60
61 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
62 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
63 (unsigned long long) adapter->peer_wwnn);
64 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
65 (unsigned long long) adapter->peer_wwpn);
66 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
67 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
68 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
69 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
70 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
71 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
72
73 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
74 atomic_read(&port->status));
75 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
76 (atomic_read(&port->status) &
77 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
78 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
79
80 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
81 zfcp_unit_sdev_status(unit));
82 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
83 (zfcp_unit_sdev_status(unit) &
84 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
85 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
86 (zfcp_unit_sdev_status(unit) &
87 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
88 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
89 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
90
zfcp_sysfs_port_failed_show(struct device * dev,struct device_attribute * attr,char * buf)91 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
92 struct device_attribute *attr,
93 char *buf)
94 {
95 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
96
97 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
98 return sprintf(buf, "1\n");
99
100 return sprintf(buf, "0\n");
101 }
102
zfcp_sysfs_port_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)103 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
104 struct device_attribute *attr,
105 const char *buf, size_t count)
106 {
107 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
108 unsigned long val;
109
110 if (kstrtoul(buf, 0, &val) || val != 0)
111 return -EINVAL;
112
113 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
114 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
115 zfcp_erp_wait(port->adapter);
116
117 return count;
118 }
119 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
120 zfcp_sysfs_port_failed_show,
121 zfcp_sysfs_port_failed_store);
122
zfcp_sysfs_unit_failed_show(struct device * dev,struct device_attribute * attr,char * buf)123 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
124 struct device_attribute *attr,
125 char *buf)
126 {
127 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
128 struct scsi_device *sdev;
129 unsigned int status, failed = 1;
130
131 sdev = zfcp_unit_sdev(unit);
132 if (sdev) {
133 status = atomic_read(&sdev_to_zfcp(sdev)->status);
134 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
135 scsi_device_put(sdev);
136 }
137
138 return sprintf(buf, "%d\n", failed);
139 }
140
zfcp_sysfs_unit_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)141 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
142 struct device_attribute *attr,
143 const char *buf, size_t count)
144 {
145 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
146 unsigned long val;
147 struct scsi_device *sdev;
148
149 if (kstrtoul(buf, 0, &val) || val != 0)
150 return -EINVAL;
151
152 sdev = zfcp_unit_sdev(unit);
153 if (sdev) {
154 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
155 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
156 "syufai2");
157 zfcp_erp_wait(unit->port->adapter);
158 } else
159 zfcp_unit_scsi_scan(unit);
160
161 return count;
162 }
163 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
164 zfcp_sysfs_unit_failed_show,
165 zfcp_sysfs_unit_failed_store);
166
zfcp_sysfs_adapter_failed_show(struct device * dev,struct device_attribute * attr,char * buf)167 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
168 struct device_attribute *attr,
169 char *buf)
170 {
171 struct ccw_device *cdev = to_ccwdev(dev);
172 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
173 int i;
174
175 if (!adapter)
176 return -ENODEV;
177
178 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
179 i = sprintf(buf, "1\n");
180 else
181 i = sprintf(buf, "0\n");
182
183 zfcp_ccw_adapter_put(adapter);
184 return i;
185 }
186
zfcp_sysfs_adapter_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)187 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190 {
191 struct ccw_device *cdev = to_ccwdev(dev);
192 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
193 unsigned long val;
194 int retval = 0;
195
196 if (!adapter)
197 return -ENODEV;
198
199 if (kstrtoul(buf, 0, &val) || val != 0) {
200 retval = -EINVAL;
201 goto out;
202 }
203
204 zfcp_erp_adapter_reset_sync(adapter, "syafai2");
205 out:
206 zfcp_ccw_adapter_put(adapter);
207 return retval ? retval : (ssize_t) count;
208 }
209 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
210 zfcp_sysfs_adapter_failed_show,
211 zfcp_sysfs_adapter_failed_store);
212
zfcp_sysfs_port_rescan_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)213 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216 {
217 struct ccw_device *cdev = to_ccwdev(dev);
218 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
219 int retval = 0;
220
221 if (!adapter)
222 return -ENODEV;
223
224 /*
225 * If `scsi_host` is missing, we can't schedule `scan_work`, as it
226 * makes use of the corresponding fc_host object. But this state is
227 * only possible if xconfig/xport data has never completed yet,
228 * and we couldn't successfully scan for ports anyway.
229 */
230 if (adapter->scsi_host == NULL) {
231 retval = -ENODEV;
232 goto out;
233 }
234
235 /*
236 * Users wish is our command: immediately schedule and flush a
237 * worker to conduct a synchronous port scan, that is, neither
238 * a random delay nor a rate limit is applied here.
239 */
240 queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
241 flush_delayed_work(&adapter->scan_work);
242 out:
243 zfcp_ccw_adapter_put(adapter);
244 return retval ? retval : (ssize_t) count;
245 }
246 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
247 zfcp_sysfs_port_rescan_store);
248
249 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
250
zfcp_sysfs_port_set_removing(struct zfcp_port * const port)251 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
252 {
253 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
254 atomic_set(&port->units, -1);
255 }
256
zfcp_sysfs_port_is_removing(const struct zfcp_port * const port)257 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
258 {
259 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
260 return atomic_read(&port->units) == -1;
261 }
262
zfcp_sysfs_port_in_use(struct zfcp_port * const port)263 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
264 {
265 struct zfcp_adapter *const adapter = port->adapter;
266 unsigned long flags;
267 struct scsi_device *sdev;
268 bool in_use = true;
269
270 mutex_lock(&zfcp_sysfs_port_units_mutex);
271 if (atomic_read(&port->units) > 0)
272 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
273
274 spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
275 __shost_for_each_device(sdev, adapter->scsi_host) {
276 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
277
278 if (sdev->sdev_state == SDEV_DEL ||
279 sdev->sdev_state == SDEV_CANCEL)
280 continue;
281 if (zsdev->port != port)
282 continue;
283 /* alive scsi_device under port of interest */
284 goto unlock_host_lock;
285 }
286
287 /* port is about to be removed, so no more unit_add or slave_alloc */
288 zfcp_sysfs_port_set_removing(port);
289 in_use = false;
290
291 unlock_host_lock:
292 spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
293 unlock_port_units_mutex:
294 mutex_unlock(&zfcp_sysfs_port_units_mutex);
295 return in_use;
296 }
297
zfcp_sysfs_port_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)298 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
299 struct device_attribute *attr,
300 const char *buf, size_t count)
301 {
302 struct ccw_device *cdev = to_ccwdev(dev);
303 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
304 struct zfcp_port *port;
305 u64 wwpn;
306 int retval = -EINVAL;
307
308 if (!adapter)
309 return -ENODEV;
310
311 if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
312 goto out;
313
314 port = zfcp_get_port_by_wwpn(adapter, wwpn);
315 if (!port)
316 goto out;
317 else
318 retval = 0;
319
320 if (zfcp_sysfs_port_in_use(port)) {
321 retval = -EBUSY;
322 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
323 goto out;
324 }
325
326 write_lock_irq(&adapter->port_list_lock);
327 list_del(&port->list);
328 write_unlock_irq(&adapter->port_list_lock);
329
330 zfcp_erp_port_shutdown(port, 0, "syprs_1");
331 device_unregister(&port->dev);
332
333 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
334 out:
335 zfcp_ccw_adapter_put(adapter);
336 return retval ? retval : (ssize_t) count;
337 }
338 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
339 zfcp_sysfs_port_remove_store);
340
341 static ssize_t
zfcp_sysfs_adapter_diag_max_age_show(struct device * dev,struct device_attribute * attr,char * buf)342 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
343 struct device_attribute *attr, char *buf)
344 {
345 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
346 ssize_t rc;
347
348 if (!adapter)
349 return -ENODEV;
350
351 /* ceil(log(2^64 - 1) / log(10)) = 20 */
352 rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
353
354 zfcp_ccw_adapter_put(adapter);
355 return rc;
356 }
357
358 static ssize_t
zfcp_sysfs_adapter_diag_max_age_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)359 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
360 struct device_attribute *attr,
361 const char *buf, size_t count)
362 {
363 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
364 unsigned long max_age;
365 ssize_t rc;
366
367 if (!adapter)
368 return -ENODEV;
369
370 rc = kstrtoul(buf, 10, &max_age);
371 if (rc != 0)
372 goto out;
373
374 adapter->diagnostics->max_age = max_age;
375
376 rc = count;
377 out:
378 zfcp_ccw_adapter_put(adapter);
379 return rc;
380 }
381 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
382 zfcp_sysfs_adapter_diag_max_age_show,
383 zfcp_sysfs_adapter_diag_max_age_store);
384
zfcp_sysfs_adapter_fc_security_show(struct device * dev,struct device_attribute * attr,char * buf)385 static ssize_t zfcp_sysfs_adapter_fc_security_show(
386 struct device *dev, struct device_attribute *attr, char *buf)
387 {
388 struct ccw_device *cdev = to_ccwdev(dev);
389 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
390 unsigned int status;
391 int i;
392
393 if (!adapter)
394 return -ENODEV;
395
396 /*
397 * Adapter status COMMON_OPEN implies xconf data and xport data
398 * was done. Adapter FC Endpoint Security capability remains
399 * unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
400 * down).
401 */
402 status = atomic_read(&adapter->status);
403 if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
404 i = sprintf(buf, "unknown\n");
405 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
406 i = sprintf(buf, "unsupported\n");
407 else {
408 i = zfcp_fsf_scnprint_fc_security(
409 buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
410 ZFCP_FSF_PRINT_FMT_LIST);
411 i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
412 }
413
414 zfcp_ccw_adapter_put(adapter);
415 return i;
416 }
417 static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
418 zfcp_sysfs_adapter_fc_security_show,
419 NULL);
420
421 static struct attribute *zfcp_adapter_attrs[] = {
422 &dev_attr_adapter_failed.attr,
423 &dev_attr_adapter_in_recovery.attr,
424 &dev_attr_adapter_port_remove.attr,
425 &dev_attr_adapter_port_rescan.attr,
426 &dev_attr_adapter_peer_wwnn.attr,
427 &dev_attr_adapter_peer_wwpn.attr,
428 &dev_attr_adapter_peer_d_id.attr,
429 &dev_attr_adapter_card_version.attr,
430 &dev_attr_adapter_lic_version.attr,
431 &dev_attr_adapter_status.attr,
432 &dev_attr_adapter_hardware_version.attr,
433 &dev_attr_adapter_diag_max_age.attr,
434 &dev_attr_adapter_fc_security.attr,
435 NULL
436 };
437
438 static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
439 .attrs = zfcp_adapter_attrs,
440 };
441
zfcp_sysfs_unit_add_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)442 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
443 struct device_attribute *attr,
444 const char *buf, size_t count)
445 {
446 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
447 u64 fcp_lun;
448 int retval;
449
450 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
451 return -EINVAL;
452
453 flush_work(&port->rport_work);
454
455 retval = zfcp_unit_add(port, fcp_lun);
456 if (retval)
457 return retval;
458
459 return count;
460 }
461 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
462
zfcp_sysfs_unit_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)463 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466 {
467 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
468 u64 fcp_lun;
469
470 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
471 return -EINVAL;
472
473 if (zfcp_unit_remove(port, fcp_lun))
474 return -EINVAL;
475
476 return count;
477 }
478 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
479
zfcp_sysfs_port_fc_security_show(struct device * dev,struct device_attribute * attr,char * buf)480 static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
481 struct device_attribute *attr,
482 char *buf)
483 {
484 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
485 struct zfcp_adapter *adapter = port->adapter;
486 unsigned int status = atomic_read(&port->status);
487 int i;
488
489 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
490 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
491 0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
492 0 != (status & ZFCP_STATUS_PORT_LINK_TEST) ||
493 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
494 0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
495 i = sprintf(buf, "unknown\n");
496 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
497 i = sprintf(buf, "unsupported\n");
498 else {
499 i = zfcp_fsf_scnprint_fc_security(
500 buf, PAGE_SIZE - 1, port->connection_info,
501 ZFCP_FSF_PRINT_FMT_SINGLEITEM);
502 i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
503 }
504
505 return i;
506 }
507 static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
508 zfcp_sysfs_port_fc_security_show,
509 NULL);
510
511 static struct attribute *zfcp_port_attrs[] = {
512 &dev_attr_unit_add.attr,
513 &dev_attr_unit_remove.attr,
514 &dev_attr_port_failed.attr,
515 &dev_attr_port_in_recovery.attr,
516 &dev_attr_port_status.attr,
517 &dev_attr_port_access_denied.attr,
518 &dev_attr_port_fc_security.attr,
519 NULL
520 };
521 static struct attribute_group zfcp_port_attr_group = {
522 .attrs = zfcp_port_attrs,
523 };
524 const struct attribute_group *zfcp_port_attr_groups[] = {
525 &zfcp_port_attr_group,
526 NULL,
527 };
528
529 static struct attribute *zfcp_unit_attrs[] = {
530 &dev_attr_unit_failed.attr,
531 &dev_attr_unit_in_recovery.attr,
532 &dev_attr_unit_status.attr,
533 &dev_attr_unit_access_denied.attr,
534 &dev_attr_unit_access_shared.attr,
535 &dev_attr_unit_access_readonly.attr,
536 NULL
537 };
538 static struct attribute_group zfcp_unit_attr_group = {
539 .attrs = zfcp_unit_attrs,
540 };
541 const struct attribute_group *zfcp_unit_attr_groups[] = {
542 &zfcp_unit_attr_group,
543 NULL,
544 };
545
546 #define ZFCP_DEFINE_LATENCY_ATTR(_name) \
547 static ssize_t \
548 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
549 struct device_attribute *attr, \
550 char *buf) { \
551 struct scsi_device *sdev = to_scsi_device(dev); \
552 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
553 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
554 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; \
555 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
556 \
557 spin_lock_bh(&lat->lock); \
558 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
559 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
560 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
561 csum = lat->_name.channel.sum * adapter->timer_ticks; \
562 cmin = lat->_name.channel.min * adapter->timer_ticks; \
563 cmax = lat->_name.channel.max * adapter->timer_ticks; \
564 cc = lat->_name.counter; \
565 spin_unlock_bh(&lat->lock); \
566 \
567 do_div(fsum, 1000); \
568 do_div(fmin, 1000); \
569 do_div(fmax, 1000); \
570 do_div(csum, 1000); \
571 do_div(cmin, 1000); \
572 do_div(cmax, 1000); \
573 \
574 return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
575 fmin, fmax, fsum, cmin, cmax, csum, cc); \
576 } \
577 static ssize_t \
578 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
579 struct device_attribute *attr, \
580 const char *buf, size_t count) \
581 { \
582 struct scsi_device *sdev = to_scsi_device(dev); \
583 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
584 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
585 unsigned long flags; \
586 \
587 spin_lock_irqsave(&lat->lock, flags); \
588 lat->_name.fabric.sum = 0; \
589 lat->_name.fabric.min = 0xFFFFFFFF; \
590 lat->_name.fabric.max = 0; \
591 lat->_name.channel.sum = 0; \
592 lat->_name.channel.min = 0xFFFFFFFF; \
593 lat->_name.channel.max = 0; \
594 lat->_name.counter = 0; \
595 spin_unlock_irqrestore(&lat->lock, flags); \
596 \
597 return (ssize_t) count; \
598 } \
599 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
600 zfcp_sysfs_unit_##_name##_latency_show, \
601 zfcp_sysfs_unit_##_name##_latency_store);
602
603 ZFCP_DEFINE_LATENCY_ATTR(read);
604 ZFCP_DEFINE_LATENCY_ATTR(write);
605 ZFCP_DEFINE_LATENCY_ATTR(cmd);
606
607 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
608 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
609 struct device_attribute *attr,\
610 char *buf) \
611 { \
612 struct scsi_device *sdev = to_scsi_device(dev); \
613 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
614 \
615 return sprintf(buf, _format, _value); \
616 } \
617 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
618
619 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
620 dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
621 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
622 (unsigned long long) zfcp_sdev->port->wwpn);
623
zfcp_sysfs_scsi_fcp_lun_show(struct device * dev,struct device_attribute * attr,char * buf)624 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
625 struct device_attribute *attr,
626 char *buf)
627 {
628 struct scsi_device *sdev = to_scsi_device(dev);
629
630 return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
631 }
632 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
633
634 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
635 (atomic_read(&zfcp_sdev->status) &
636 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
637
zfcp_sysfs_scsi_zfcp_failed_show(struct device * dev,struct device_attribute * attr,char * buf)638 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
639 struct device_attribute *attr,
640 char *buf)
641 {
642 struct scsi_device *sdev = to_scsi_device(dev);
643 unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
644 unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
645
646 return sprintf(buf, "%d\n", failed);
647 }
648
zfcp_sysfs_scsi_zfcp_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)649 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
650 struct device_attribute *attr,
651 const char *buf, size_t count)
652 {
653 struct scsi_device *sdev = to_scsi_device(dev);
654 unsigned long val;
655
656 if (kstrtoul(buf, 0, &val) || val != 0)
657 return -EINVAL;
658
659 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
660 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
661 "syufai3");
662 zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
663
664 return count;
665 }
666 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
667 zfcp_sysfs_scsi_zfcp_failed_show,
668 zfcp_sysfs_scsi_zfcp_failed_store);
669
670 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
671 (atomic_read(&zfcp_sdev->status) &
672 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
673
674 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
675 atomic_read(&zfcp_sdev->status));
676
677 static struct attribute *zfcp_sdev_attrs[] = {
678 &dev_attr_fcp_lun.attr,
679 &dev_attr_wwpn.attr,
680 &dev_attr_hba_id.attr,
681 &dev_attr_read_latency.attr,
682 &dev_attr_write_latency.attr,
683 &dev_attr_cmd_latency.attr,
684 &dev_attr_zfcp_access_denied.attr,
685 &dev_attr_zfcp_failed.attr,
686 &dev_attr_zfcp_in_recovery.attr,
687 &dev_attr_zfcp_status.attr,
688 NULL
689 };
690
691 static const struct attribute_group zfcp_sysfs_sdev_attr_group = {
692 .attrs = zfcp_sdev_attrs
693 };
694
695 const struct attribute_group *zfcp_sysfs_sdev_attr_groups[] = {
696 &zfcp_sysfs_sdev_attr_group,
697 NULL
698 };
699
zfcp_sysfs_adapter_util_show(struct device * dev,struct device_attribute * attr,char * buf)700 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
701 struct device_attribute *attr,
702 char *buf)
703 {
704 struct Scsi_Host *scsi_host = dev_to_shost(dev);
705 struct fsf_qtcb_bottom_port *qtcb_port;
706 struct zfcp_adapter *adapter;
707 int retval;
708
709 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
710 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
711 return -EOPNOTSUPP;
712
713 qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
714 if (!qtcb_port)
715 return -ENOMEM;
716
717 retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
718 if (retval == 0 || retval == -EAGAIN)
719 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
720 qtcb_port->cb_util, qtcb_port->a_util);
721 kfree(qtcb_port);
722 return retval;
723 }
724 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
725
zfcp_sysfs_adapter_ex_config(struct device * dev,struct fsf_statistics_info * stat_inf)726 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
727 struct fsf_statistics_info *stat_inf)
728 {
729 struct Scsi_Host *scsi_host = dev_to_shost(dev);
730 struct fsf_qtcb_bottom_config *qtcb_config;
731 struct zfcp_adapter *adapter;
732 int retval;
733
734 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
735 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
736 return -EOPNOTSUPP;
737
738 qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
739 GFP_KERNEL);
740 if (!qtcb_config)
741 return -ENOMEM;
742
743 retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
744 if (retval == 0 || retval == -EAGAIN)
745 *stat_inf = qtcb_config->stat_info;
746
747 kfree(qtcb_config);
748 return retval;
749 }
750
751 #define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
752 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
753 struct device_attribute *attr,\
754 char *buf) \
755 { \
756 struct fsf_statistics_info stat_info; \
757 int retval; \
758 \
759 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
760 if (retval) \
761 return retval; \
762 \
763 return sprintf(buf, _format, ## _arg); \
764 } \
765 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
766
767 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
768 (unsigned long long) stat_info.input_req,
769 (unsigned long long) stat_info.output_req,
770 (unsigned long long) stat_info.control_req);
771
772 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
773 (unsigned long long) stat_info.input_mb,
774 (unsigned long long) stat_info.output_mb);
775
776 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
777 (unsigned long long) stat_info.seconds_act);
778
zfcp_sysfs_adapter_q_full_show(struct device * dev,struct device_attribute * attr,char * buf)779 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
780 struct device_attribute *attr,
781 char *buf)
782 {
783 struct Scsi_Host *scsi_host = class_to_shost(dev);
784 struct zfcp_qdio *qdio =
785 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
786 u64 util;
787
788 spin_lock_bh(&qdio->stat_lock);
789 util = qdio->req_q_util;
790 spin_unlock_bh(&qdio->stat_lock);
791
792 return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
793 (unsigned long long)util);
794 }
795 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
796
797 static struct attribute *zfcp_sysfs_shost_attrs[] = {
798 &dev_attr_utilization.attr,
799 &dev_attr_requests.attr,
800 &dev_attr_megabytes.attr,
801 &dev_attr_seconds_active.attr,
802 &dev_attr_queue_full.attr,
803 NULL
804 };
805
806 static const struct attribute_group zfcp_sysfs_shost_attr_group = {
807 .attrs = zfcp_sysfs_shost_attrs
808 };
809
810 const struct attribute_group *zfcp_sysfs_shost_attr_groups[] = {
811 &zfcp_sysfs_shost_attr_group,
812 NULL
813 };
814
zfcp_sysfs_adapter_diag_b2b_credit_show(struct device * dev,struct device_attribute * attr,char * buf)815 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
816 struct device *dev, struct device_attribute *attr, char *buf)
817 {
818 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
819 struct zfcp_diag_header *diag_hdr;
820 struct fc_els_flogi *nsp;
821 ssize_t rc = -ENOLINK;
822 unsigned long flags;
823 unsigned int status;
824
825 if (!adapter)
826 return -ENODEV;
827
828 status = atomic_read(&adapter->status);
829 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
830 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
831 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
832 goto out;
833
834 diag_hdr = &adapter->diagnostics->config_data.header;
835
836 rc = zfcp_diag_update_buffer_limited(
837 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
838 if (rc != 0)
839 goto out;
840
841 spin_lock_irqsave(&diag_hdr->access_lock, flags);
842 /* nport_serv_param doesn't contain the ELS_Command code */
843 nsp = (struct fc_els_flogi *)((unsigned long)
844 adapter->diagnostics->config_data
845 .data.nport_serv_param -
846 sizeof(u32));
847
848 rc = scnprintf(buf, 5 + 2, "%hu\n",
849 be16_to_cpu(nsp->fl_csp.sp_bb_cred));
850 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
851
852 out:
853 zfcp_ccw_adapter_put(adapter);
854 return rc;
855 }
856 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
857 zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
858
859 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt) \
860 static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show( \
861 struct device *dev, struct device_attribute *attr, char *buf) \
862 { \
863 struct zfcp_adapter *const adapter = \
864 zfcp_ccw_adapter_by_cdev(to_ccwdev(dev)); \
865 struct zfcp_diag_header *diag_hdr; \
866 ssize_t rc = -ENOLINK; \
867 unsigned long flags; \
868 unsigned int status; \
869 \
870 if (!adapter) \
871 return -ENODEV; \
872 \
873 status = atomic_read(&adapter->status); \
874 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) || \
875 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) || \
876 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED)) \
877 goto out; \
878 \
879 if (!zfcp_diag_support_sfp(adapter)) { \
880 rc = -EOPNOTSUPP; \
881 goto out; \
882 } \
883 \
884 diag_hdr = &adapter->diagnostics->port_data.header; \
885 \
886 rc = zfcp_diag_update_buffer_limited( \
887 adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
888 if (rc != 0) \
889 goto out; \
890 \
891 spin_lock_irqsave(&diag_hdr->access_lock, flags); \
892 rc = scnprintf( \
893 buf, (_prtsize) + 2, _prtfmt "\n", \
894 adapter->diagnostics->port_data.data._qtcb_member); \
895 spin_unlock_irqrestore(&diag_hdr->access_lock, flags); \
896 \
897 out: \
898 zfcp_ccw_adapter_put(adapter); \
899 return rc; \
900 } \
901 static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400, \
902 zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
903
904 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 6, "%hd");
905 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
906 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
907 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
908 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
909 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
910 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
911 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
912 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
913 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
914
915 static struct attribute *zfcp_sysfs_diag_attrs[] = {
916 &dev_attr_adapter_diag_sfp_temperature.attr,
917 &dev_attr_adapter_diag_sfp_vcc.attr,
918 &dev_attr_adapter_diag_sfp_tx_bias.attr,
919 &dev_attr_adapter_diag_sfp_tx_power.attr,
920 &dev_attr_adapter_diag_sfp_rx_power.attr,
921 &dev_attr_adapter_diag_sfp_port_tx_type.attr,
922 &dev_attr_adapter_diag_sfp_optical_port.attr,
923 &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
924 &dev_attr_adapter_diag_sfp_connector_type.attr,
925 &dev_attr_adapter_diag_sfp_fec_active.attr,
926 &dev_attr_adapter_diag_b2b_credit.attr,
927 NULL,
928 };
929
930 static const struct attribute_group zfcp_sysfs_diag_attr_group = {
931 .name = "diagnostics",
932 .attrs = zfcp_sysfs_diag_attrs,
933 };
934
935 const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
936 &zfcp_sysfs_adapter_attr_group,
937 &zfcp_sysfs_diag_attr_group,
938 NULL,
939 };
940