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Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-block.git] / drivers / s390 / scsi / zfcp_sysfs.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
60221920
SS		 2/*
3 * zfcp device driver
4 *
5 * sysfs attributes.
6 *
a53c8fab 7 * Copyright IBM Corp. 2008, 2010
60221920
SS		 8 */
9
ecf39d42
CS		 10#define KMSG_COMPONENT "zfcp"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
5a0e3ad6 13#include <linux/slab.h>
6028f7c4 14#include "zfcp_diag.h"
60221920
SS		 15#include "zfcp_ext.h"
16
17#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
18struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
19 _show, _store)
20#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
21static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
22 struct device_attribute *at,\
23 char *buf) \
24{ \
615f59e0 25 struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
60221920
SS		 26 \
27 return sprintf(buf, _format, _value); \
28} \
29static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
30 zfcp_sysfs_##_feat##_##_name##_show, NULL);
31
b5dc3c48
MP		 32#define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value) \
33static 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} \
39static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
40 zfcp_sysfs_##_feat##_##_name##_show, NULL);
41
de3dc572
SS		 42#define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
43static 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} \
58static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
59 zfcp_sysfs_adapter_##_name##_show, NULL);
60
61ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
62ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
63 (unsigned long long) adapter->peer_wwnn);
64ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
65 (unsigned long long) adapter->peer_wwpn);
66ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
67ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
68ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
69ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
70ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
71 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
60221920
SS		 72
73ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
74 atomic_read(&port->status));
75ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
76 (atomic_read(&port->status) &
77 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
1b33ef23 78ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
60221920
SS		 79
80ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
b62a8d9b 81 zfcp_unit_sdev_status(unit));
60221920 82ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
b62a8d9b 83 (zfcp_unit_sdev_status(unit) &
60221920
SS		 84 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
85ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
b62a8d9b 86 (zfcp_unit_sdev_status(unit) &
60221920 87 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
b5dc3c48
MP		 88ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
89ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
60221920 90
e4b9857f
CS		 91static 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);
60221920 96
e4b9857f
CS		 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
103static 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
ee732ea8 110 if (kstrtoul(buf, 0, &val) || val != 0)
e4b9857f
CS		 111 return -EINVAL;
112
edaed859 113 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
ea4a3a6a 114 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
e4b9857f
CS		 115 zfcp_erp_wait(port->adapter);
116
117 return count;
118}
119static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
120 zfcp_sysfs_port_failed_show,
121 zfcp_sysfs_port_failed_store);
122
123static 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);
b62a8d9b
CS		 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 }
e4b9857f 137
b62a8d9b 138 return sprintf(buf, "%d\n", failed);
e4b9857f
CS		 139}
140
141static 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;
b62a8d9b 147 struct scsi_device *sdev;
e4b9857f 148
ee732ea8 149 if (kstrtoul(buf, 0, &val) || val != 0)
e4b9857f
CS		 150 return -EINVAL;
151
b62a8d9b
CS		 152 sdev = zfcp_unit_sdev(unit);
153 if (sdev) {
edaed859 154 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
b62a8d9b 155 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
ea4a3a6a 156 "syufai2");
b62a8d9b
CS		 157 zfcp_erp_wait(unit->port->adapter);
158 } else
159 zfcp_unit_scsi_scan(unit);
e4b9857f
CS		 160
161 return count;
162}
163static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
164 zfcp_sysfs_unit_failed_show,
165 zfcp_sysfs_unit_failed_store);
60221920 166
de3dc572
SS		 167static 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
187static 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
ee732ea8 199 if (kstrtoul(buf, 0, &val) || val != 0) {
de3dc572
SS		 200 retval = -EINVAL;
201 goto out;
202 }
203
35e9111a 204 zfcp_erp_adapter_reset_sync(adapter, "syafai2");
de3dc572
SS		 205out:
206 zfcp_ccw_adapter_put(adapter);
207 return retval ? retval : (ssize_t) count;
208}
209static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
210 zfcp_sysfs_adapter_failed_show,
211 zfcp_sysfs_adapter_failed_store);
212
60221920
SS		 213static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216{
de3dc572
SS		 217 struct ccw_device *cdev = to_ccwdev(dev);
218 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
60221920 219
de3dc572
SS		 220 if (!adapter)
221 return -ENODEV;
222
18f87a67
MP		 223 /*
224 * Users wish is our command: immediately schedule and flush a
225 * worker to conduct a synchronous port scan, that is, neither
226 * a random delay nor a rate limit is applied here.
227 */
228 queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
229 flush_delayed_work(&adapter->scan_work);
de3dc572 230 zfcp_ccw_adapter_put(adapter);
6b183334 231
9eae07ef 232 return (ssize_t) count;
60221920
SS		 233}
234static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
235 zfcp_sysfs_port_rescan_store);
236
d99b601b
SM		 237DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
238
ef4021fe
SM		 239static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
240{
241 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
242 atomic_set(&port->units, -1);
243}
244
245bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
246{
247 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
248 return atomic_read(&port->units) == -1;
249}
250
251static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
252{
253 struct zfcp_adapter *const adapter = port->adapter;
254 unsigned long flags;
255 struct scsi_device *sdev;
256 bool in_use = true;
257
258 mutex_lock(&zfcp_sysfs_port_units_mutex);
259 if (atomic_read(&port->units) > 0)
260 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
261
262 spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
263 __shost_for_each_device(sdev, adapter->scsi_host) {
264 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
265
266 if (sdev->sdev_state == SDEV_DEL ||
267 sdev->sdev_state == SDEV_CANCEL)
268 continue;
269 if (zsdev->port != port)
270 continue;
271 /* alive scsi_device under port of interest */
272 goto unlock_host_lock;
273 }
274
275 /* port is about to be removed, so no more unit_add or slave_alloc */
276 zfcp_sysfs_port_set_removing(port);
277 in_use = false;
278
279unlock_host_lock:
280 spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
281unlock_port_units_mutex:
282 mutex_unlock(&zfcp_sysfs_port_units_mutex);
283 return in_use;
284}
285
60221920
SS		 286static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
287 struct device_attribute *attr,
288 const char *buf, size_t count)
289{
de3dc572
SS		 290 struct ccw_device *cdev = to_ccwdev(dev);
291 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
60221920 292 struct zfcp_port *port;
7ba58c9c 293 u64 wwpn;
6b183334 294 int retval = -EINVAL;
60221920 295
de3dc572
SS		 296 if (!adapter)
297 return -ENODEV;
298
ee732ea8 299 if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
60221920 300 goto out;
60221920 301
60221920 302 port = zfcp_get_port_by_wwpn(adapter, wwpn);
6b183334 303 if (!port)
60221920 304 goto out;
6b183334
SS		 305 else
306 retval = 0;
f3450c7b 307
ef4021fe 308 if (zfcp_sysfs_port_in_use(port)) {
d99b601b 309 retval = -EBUSY;
d27e5e07 310 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
d99b601b
SM		 311 goto out;
312 }
d99b601b 313
f3450c7b
SS		 314 write_lock_irq(&adapter->port_list_lock);
315 list_del(&port->list);
316 write_unlock_irq(&adapter->port_list_lock);
317
615f59e0 318 put_device(&port->dev);
f3450c7b 319
ea4a3a6a 320 zfcp_erp_port_shutdown(port, 0, "syprs_1");
83d4e1c3 321 device_unregister(&port->dev);
60221920 322 out:
de3dc572 323 zfcp_ccw_adapter_put(adapter);
60221920
SS		 324 return retval ? retval : (ssize_t) count;
325}
326static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
327 zfcp_sysfs_port_remove_store);
328
48910f8c
BB		 329static ssize_t
330zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
331 struct device_attribute *attr, char *buf)
332{
333 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
334 ssize_t rc;
335
336 if (!adapter)
337 return -ENODEV;
338
339 /* ceil(log(2^64 - 1) / log(10)) = 20 */
340 rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
341
342 zfcp_ccw_adapter_put(adapter);
343 return rc;
344}
345
346static ssize_t
347zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
348 struct device_attribute *attr,
349 const char *buf, size_t count)
350{
351 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
352 unsigned long max_age;
353 ssize_t rc;
354
355 if (!adapter)
356 return -ENODEV;
357
358 rc = kstrtoul(buf, 10, &max_age);
359 if (rc != 0)
360 goto out;
361
362 adapter->diagnostics->max_age = max_age;
363
364 rc = count;
365out:
366 zfcp_ccw_adapter_put(adapter);
367 return rc;
368}
369static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
370 zfcp_sysfs_adapter_diag_max_age_show,
371 zfcp_sysfs_adapter_diag_max_age_store);
372
60221920
SS		 373static struct attribute *zfcp_adapter_attrs[] = {
374 &dev_attr_adapter_failed.attr,
375 &dev_attr_adapter_in_recovery.attr,
376 &dev_attr_adapter_port_remove.attr,
377 &dev_attr_adapter_port_rescan.attr,
378 &dev_attr_adapter_peer_wwnn.attr,
379 &dev_attr_adapter_peer_wwpn.attr,
380 &dev_attr_adapter_peer_d_id.attr,
381 &dev_attr_adapter_card_version.attr,
382 &dev_attr_adapter_lic_version.attr,
383 &dev_attr_adapter_status.attr,
384 &dev_attr_adapter_hardware_version.attr,
48910f8c 385 &dev_attr_adapter_diag_max_age.attr,
60221920
SS		 386 NULL
387};
388
389struct attribute_group zfcp_sysfs_adapter_attrs = {
390 .attrs = zfcp_adapter_attrs,
391};
392
393static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
394 struct device_attribute *attr,
395 const char *buf, size_t count)
396{
615f59e0 397 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
7ba58c9c 398 u64 fcp_lun;
d99b601b 399 int retval;
60221920 400
ee732ea8 401 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
1daa4eb5 402 return -EINVAL;
60221920 403
d99b601b
SM		 404 retval = zfcp_unit_add(port, fcp_lun);
405 if (retval)
406 return retval;
60221920 407
1daa4eb5 408 return count;
60221920
SS		 409}
410static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
411
412static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
413 struct device_attribute *attr,
414 const char *buf, size_t count)
415{
615f59e0 416 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
7ba58c9c 417 u64 fcp_lun;
60221920 418
ee732ea8 419 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
1daa4eb5 420 return -EINVAL;
60221920 421
1daa4eb5
CS		 422 if (zfcp_unit_remove(port, fcp_lun))
423 return -EINVAL;
ecf0c772 424
1daa4eb5 425 return count;
60221920
SS		 426}
427static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
428
5ab944f9 429static struct attribute *zfcp_port_attrs[] = {
60221920
SS		 430 &dev_attr_unit_add.attr,
431 &dev_attr_unit_remove.attr,
432 &dev_attr_port_failed.attr,
433 &dev_attr_port_in_recovery.attr,
434 &dev_attr_port_status.attr,
435 &dev_attr_port_access_denied.attr,
436 NULL
437};
83d4e1c3 438static struct attribute_group zfcp_port_attr_group = {
5ab944f9 439 .attrs = zfcp_port_attrs,
60221920 440};
83d4e1c3
SO		 441const struct attribute_group *zfcp_port_attr_groups[] = {
442 &zfcp_port_attr_group,
443 NULL,
444};
60221920
SS		 445
446static struct attribute *zfcp_unit_attrs[] = {
447 &dev_attr_unit_failed.attr,
448 &dev_attr_unit_in_recovery.attr,
449 &dev_attr_unit_status.attr,
450 &dev_attr_unit_access_denied.attr,
b5dc3c48
MP		 451 &dev_attr_unit_access_shared.attr,
452 &dev_attr_unit_access_readonly.attr,
60221920
SS		 453 NULL
454};
86bdf218 455static struct attribute_group zfcp_unit_attr_group = {
60221920
SS		 456 .attrs = zfcp_unit_attrs,
457};
86bdf218
SO		 458const struct attribute_group *zfcp_unit_attr_groups[] = {
459 &zfcp_unit_attr_group,
460 NULL,
461};
60221920
SS		 462
463#define ZFCP_DEFINE_LATENCY_ATTR(_name) \
464static ssize_t \
465zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
466 struct device_attribute *attr, \
467 char *buf) { \
468 struct scsi_device *sdev = to_scsi_device(dev); \
b62a8d9b
CS		 469 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
470 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
471 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; \
60221920
SS		 472 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
473 \
49f0f01c 474 spin_lock_bh(&lat->lock); \
60221920
SS		 475 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
476 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
477 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
478 csum = lat->_name.channel.sum * adapter->timer_ticks; \
479 cmin = lat->_name.channel.min * adapter->timer_ticks; \
480 cmax = lat->_name.channel.max * adapter->timer_ticks; \
481 cc = lat->_name.counter; \
49f0f01c 482 spin_unlock_bh(&lat->lock); \
60221920
SS		 483 \
484 do_div(fsum, 1000); \
485 do_div(fmin, 1000); \
486 do_div(fmax, 1000); \
487 do_div(csum, 1000); \
488 do_div(cmin, 1000); \
489 do_div(cmax, 1000); \
490 \
491 return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
492 fmin, fmax, fsum, cmin, cmax, csum, cc); \
493} \
494static ssize_t \
495zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
496 struct device_attribute *attr, \
497 const char *buf, size_t count) \
498{ \
499 struct scsi_device *sdev = to_scsi_device(dev); \
b62a8d9b
CS		 500 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
501 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
60221920
SS		 502 unsigned long flags; \
503 \
504 spin_lock_irqsave(&lat->lock, flags); \
505 lat->_name.fabric.sum = 0; \
506 lat->_name.fabric.min = 0xFFFFFFFF; \
507 lat->_name.fabric.max = 0; \
508 lat->_name.channel.sum = 0; \
509 lat->_name.channel.min = 0xFFFFFFFF; \
510 lat->_name.channel.max = 0; \
511 lat->_name.counter = 0; \
512 spin_unlock_irqrestore(&lat->lock, flags); \
513 \
514 return (ssize_t) count; \
515} \
516static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
517 zfcp_sysfs_unit_##_name##_latency_show, \
518 zfcp_sysfs_unit_##_name##_latency_store);
519
520ZFCP_DEFINE_LATENCY_ATTR(read);
521ZFCP_DEFINE_LATENCY_ATTR(write);
522ZFCP_DEFINE_LATENCY_ATTR(cmd);
523
524#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
525static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
526 struct device_attribute *attr,\
527 char *buf) \
528{ \
b62a8d9b
CS		 529 struct scsi_device *sdev = to_scsi_device(dev); \
530 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
60221920
SS		 531 \
532 return sprintf(buf, _format, _value); \
533} \
534static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
535
536ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
c8bba144 537 dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
7ba58c9c 538ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
c8bba144 539 (unsigned long long) zfcp_sdev->port->wwpn);
e4b9857f
CS		 540
541static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
542 struct device_attribute *attr,
543 char *buf)
544{
545 struct scsi_device *sdev = to_scsi_device(dev);
e4b9857f 546
b62a8d9b 547 return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
e4b9857f
CS		 548}
549static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
60221920 550
c8bba144
SM		 551ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
552 (atomic_read(&zfcp_sdev->status) &
553 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
554
555static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
556 struct device_attribute *attr,
557 char *buf)
558{
559 struct scsi_device *sdev = to_scsi_device(dev);
560 unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
561 unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
562
563 return sprintf(buf, "%d\n", failed);
564}
565
566static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
567 struct device_attribute *attr,
568 const char *buf, size_t count)
569{
570 struct scsi_device *sdev = to_scsi_device(dev);
571 unsigned long val;
572
573 if (kstrtoul(buf, 0, &val) || val != 0)
574 return -EINVAL;
575
576 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
577 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
578 "syufai3");
579 zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
580
581 return count;
582}
583static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
584 zfcp_sysfs_scsi_zfcp_failed_show,
585 zfcp_sysfs_scsi_zfcp_failed_store);
586
587ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
588 (atomic_read(&zfcp_sdev->status) &
589 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
590
591ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
592 atomic_read(&zfcp_sdev->status));
593
60221920
SS		 594struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
595 &dev_attr_fcp_lun,
596 &dev_attr_wwpn,
597 &dev_attr_hba_id,
598 &dev_attr_read_latency,
599 &dev_attr_write_latency,
600 &dev_attr_cmd_latency,
c8bba144
SM		 601 &dev_attr_zfcp_access_denied,
602 &dev_attr_zfcp_failed,
603 &dev_attr_zfcp_in_recovery,
604 &dev_attr_zfcp_status,
60221920
SS		 605 NULL
606};
607
608static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
609 struct device_attribute *attr,
610 char *buf)
611{
612 struct Scsi_Host *scsi_host = dev_to_shost(dev);
613 struct fsf_qtcb_bottom_port *qtcb_port;
614 struct zfcp_adapter *adapter;
615 int retval;
616
617 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
618 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
619 return -EOPNOTSUPP;
620
621 qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
622 if (!qtcb_port)
623 return -ENOMEM;
624
564e1c86 625 retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
92953c6e 626 if (retval == 0 || retval == -EAGAIN)
60221920
SS		 627 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
628 qtcb_port->cb_util, qtcb_port->a_util);
629 kfree(qtcb_port);
630 return retval;
631}
632static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
633
634static int zfcp_sysfs_adapter_ex_config(struct device *dev,
635 struct fsf_statistics_info *stat_inf)
636{
637 struct Scsi_Host *scsi_host = dev_to_shost(dev);
638 struct fsf_qtcb_bottom_config *qtcb_config;
639 struct zfcp_adapter *adapter;
640 int retval;
641
642 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
643 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
644 return -EOPNOTSUPP;
645
646 qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
647 GFP_KERNEL);
648 if (!qtcb_config)
649 return -ENOMEM;
650
564e1c86 651 retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
92953c6e 652 if (retval == 0 || retval == -EAGAIN)
60221920
SS		 653 *stat_inf = qtcb_config->stat_info;
654
655 kfree(qtcb_config);
656 return retval;
657}
658
659#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
660static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
661 struct device_attribute *attr,\
662 char *buf) \
663{ \
664 struct fsf_statistics_info stat_info; \
665 int retval; \
666 \
667 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
668 if (retval) \
669 return retval; \
670 \
671 return sprintf(buf, _format, ## _arg); \
672} \
673static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
674
675ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
676 (unsigned long long) stat_info.input_req,
677 (unsigned long long) stat_info.output_req,
678 (unsigned long long) stat_info.control_req);
679
680ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
681 (unsigned long long) stat_info.input_mb,
682 (unsigned long long) stat_info.output_mb);
683
684ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
685 (unsigned long long) stat_info.seconds_act);
686
2450d3e7
SR		 687static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
688 struct device_attribute *attr,
689 char *buf)
690{
691 struct Scsi_Host *scsi_host = class_to_shost(dev);
564e1c86
SS		 692 struct zfcp_qdio *qdio =
693 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
acf7b861
CS		 694 u64 util;
695
564e1c86
SS		 696 spin_lock_bh(&qdio->stat_lock);
697 util = qdio->req_q_util;
698 spin_unlock_bh(&qdio->stat_lock);
2450d3e7 699
564e1c86 700 return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
acf7b861 701 (unsigned long long)util);
2450d3e7
SR		 702}
703static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
704
60221920
SS		 705struct device_attribute *zfcp_sysfs_shost_attrs[] = {
706 &dev_attr_utilization,
707 &dev_attr_requests,
708 &dev_attr_megabytes,
709 &dev_attr_seconds_active,
2450d3e7 710 &dev_attr_queue_full,
60221920
SS		 711 NULL
712};
6028f7c4 713
5a2876f0
BB		 714static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
715 struct device *dev, struct device_attribute *attr, char *buf)
716{
717 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
718 struct zfcp_diag_header *diag_hdr;
719 struct fc_els_flogi *nsp;
720 ssize_t rc = -ENOLINK;
721 unsigned long flags;
722 unsigned int status;
723
724 if (!adapter)
725 return -ENODEV;
726
727 status = atomic_read(&adapter->status);
728 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
729 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
730 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
731 goto out;
732
733 diag_hdr = &adapter->diagnostics->config_data.header;
734
8a72db70
BB		 735 rc = zfcp_diag_update_buffer_limited(
736 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
737 if (rc != 0)
738 goto out;
739
5a2876f0
BB		 740 spin_lock_irqsave(&diag_hdr->access_lock, flags);
741 /* nport_serv_param doesn't contain the ELS_Command code */
742 nsp = (struct fc_els_flogi *)((unsigned long)
743 adapter->diagnostics->config_data
744 .data.nport_serv_param -
745 sizeof(u32));
746
747 rc = scnprintf(buf, 5 + 2, "%hu\n",
748 be16_to_cpu(nsp->fl_csp.sp_bb_cred));
749 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
750
751out:
752 zfcp_ccw_adapter_put(adapter);
753 return rc;
754}
755static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
756 zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
757
6028f7c4
BB		 758#define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt) \
759 static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show( \
760 struct device *dev, struct device_attribute *attr, char *buf) \
761 { \
762 struct zfcp_adapter *const adapter = \
763 zfcp_ccw_adapter_by_cdev(to_ccwdev(dev)); \
764 struct zfcp_diag_header *diag_hdr; \
765 ssize_t rc = -ENOLINK; \
766 unsigned long flags; \
767 unsigned int status; \
768 \
769 if (!adapter) \
770 return -ENODEV; \
771 \
772 status = atomic_read(&adapter->status); \
773 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) || \
774 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) || \
775 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED)) \
776 goto out; \
777 \
778 if (!zfcp_diag_support_sfp(adapter)) { \
779 rc = -EOPNOTSUPP; \
780 goto out; \
781 } \
782 \
783 diag_hdr = &adapter->diagnostics->port_data.header; \
784 \
8155eb07
BB		 785 rc = zfcp_diag_update_buffer_limited( \
786 adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
787 if (rc != 0) \
788 goto out; \
789 \
6028f7c4
BB		 790 spin_lock_irqsave(&diag_hdr->access_lock, flags); \
791 rc = scnprintf( \
792 buf, (_prtsize) + 2, _prtfmt "\n", \
793 adapter->diagnostics->port_data.data._qtcb_member); \
794 spin_unlock_irqrestore(&diag_hdr->access_lock, flags); \
795 \
796 out: \
797 zfcp_ccw_adapter_put(adapter); \
798 return rc; \
799 } \
800 static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400, \
801 zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
802
a3fd4bfe 803ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 6, "%hd");
6028f7c4
BB		 804ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
805ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
806ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
807ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
808ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
809ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
810ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
811ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
812ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
813
814static struct attribute *zfcp_sysfs_diag_attrs[] = {
815 &dev_attr_adapter_diag_sfp_temperature.attr,
816 &dev_attr_adapter_diag_sfp_vcc.attr,
817 &dev_attr_adapter_diag_sfp_tx_bias.attr,
818 &dev_attr_adapter_diag_sfp_tx_power.attr,
819 &dev_attr_adapter_diag_sfp_rx_power.attr,
820 &dev_attr_adapter_diag_sfp_port_tx_type.attr,
821 &dev_attr_adapter_diag_sfp_optical_port.attr,
822 &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
823 &dev_attr_adapter_diag_sfp_connector_type.attr,
824 &dev_attr_adapter_diag_sfp_fec_active.attr,
5a2876f0 825 &dev_attr_adapter_diag_b2b_credit.attr,
6028f7c4
BB		 826 NULL,
827};
828
829const struct attribute_group zfcp_sysfs_diag_attr_group = {
830 .name = "diagnostics",
831 .attrs = zfcp_sysfs_diag_attrs,
832};
Linux 6.x block layer and io_uring tree(s)