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OMAP3: PM: Prevented DVFS state switches when enabling off-mode
[linux-ginger.git] / drivers / s390 / scsi / zfcp_sysfs.c
blob079a8cf518a3864e72a5d8d57031cbd4c2ba224f
1 /*
2 * zfcp device driver
3 *
4 * sysfs attributes.
5 *
6 * Copyright IBM Corporation 2008
7 */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include "zfcp_ext.h"
13
14 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
15 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
16 _show, _store)
17 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
18 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
19 struct device_attribute *at,\
20 char *buf) \
21 { \
22 struct _feat_def *_feat = dev_get_drvdata(dev); \
23 \
24 return sprintf(buf, _format, _value); \
25 } \
26 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
27 zfcp_sysfs_##_feat##_##_name##_show, NULL);
28
29 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n",
30 atomic_read(&adapter->status));
31 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n",
32 (unsigned long long) adapter->peer_wwnn);
33 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
34 (unsigned long long) adapter->peer_wwpn);
35 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n",
36 adapter->peer_d_id);
37 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n",
38 adapter->hydra_version);
39 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n",
40 adapter->fsf_lic_version);
41 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n",
42 adapter->hardware_version);
43 ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n",
44 (atomic_read(&adapter->status) &
45 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
46
47 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
48 atomic_read(&port->status));
49 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
50 (atomic_read(&port->status) &
51 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
52 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
53 (atomic_read(&port->status) &
54 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
55
56 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
57 atomic_read(&unit->status));
58 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
59 (atomic_read(&unit->status) &
60 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
61 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
62 (atomic_read(&unit->status) &
63 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
64 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
65 (atomic_read(&unit->status) &
66 ZFCP_STATUS_UNIT_SHARED) != 0);
67 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
68 (atomic_read(&unit->status) &
69 ZFCP_STATUS_UNIT_READONLY) != 0);
70
71 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id) \
72 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \
73 struct device_attribute *attr, \
74 char *buf) \
75 { \
76 struct _feat_def *_feat = dev_get_drvdata(dev); \
77 \
78 if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \
79 return sprintf(buf, "1\n"); \
80 else \
81 return sprintf(buf, "0\n"); \
82 } \
83 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \
84 struct device_attribute *attr,\
85 const char *buf, size_t count)\
86 { \
87 struct _feat_def *_feat = dev_get_drvdata(dev); \
88 unsigned long val; \
89 int retval = 0; \
90 \
91 mutex_lock(&zfcp_data.config_mutex); \
92 if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \
93 retval = -EBUSY; \
94 goto out; \
95 } \
96 \
97 if (strict_strtoul(buf, 0, &val) || val != 0) { \
98 retval = -EINVAL; \
99 goto out; \
100 } \
101 \
102 zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL, \
103 ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
104 zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED, \
105 _reopen_id, NULL); \
106 zfcp_erp_wait(_adapter); \
107 out: \
108 mutex_unlock(&zfcp_data.config_mutex); \
109 return retval ? retval : (ssize_t) count; \
110 } \
111 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \
112 zfcp_sysfs_##_feat##_failed_show, \
113 zfcp_sysfs_##_feat##_failed_store);
114
115 ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, "syafai1", "syafai2");
116 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
117 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
118
119 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
120 struct device_attribute *attr,
121 const char *buf, size_t count)
122 {
123 struct zfcp_adapter *adapter = dev_get_drvdata(dev);
124 int ret;
125
126 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE)
127 return -EBUSY;
128
129 ret = zfcp_fc_scan_ports(adapter);
130 return ret ? ret : (ssize_t) count;
131 }
132 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
133 zfcp_sysfs_port_rescan_store);
134
135 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
136 struct device_attribute *attr,
137 const char *buf, size_t count)
138 {
139 struct zfcp_adapter *adapter = dev_get_drvdata(dev);
140 struct zfcp_port *port;
141 u64 wwpn;
142 int retval = 0;
143 LIST_HEAD(port_remove_lh);
144
145 mutex_lock(&zfcp_data.config_mutex);
146 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
147 retval = -EBUSY;
148 goto out;
149 }
150
151 if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
152 retval = -EINVAL;
153 goto out;
154 }
155
156 write_lock_irq(&zfcp_data.config_lock);
157 port = zfcp_get_port_by_wwpn(adapter, wwpn);
158 if (port && (atomic_read(&port->refcount) == 0)) {
159 zfcp_port_get(port);
160 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
161 list_move(&port->list, &port_remove_lh);
162 } else
163 port = NULL;
164 write_unlock_irq(&zfcp_data.config_lock);
165
166 if (!port) {
167 retval = -ENXIO;
168 goto out;
169 }
170
171 zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
172 zfcp_erp_wait(adapter);
173 zfcp_port_put(port);
174 zfcp_port_dequeue(port);
175 out:
176 mutex_unlock(&zfcp_data.config_mutex);
177 return retval ? retval : (ssize_t) count;
178 }
179 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
180 zfcp_sysfs_port_remove_store);
181
182 static struct attribute *zfcp_adapter_attrs[] = {
183 &dev_attr_adapter_failed.attr,
184 &dev_attr_adapter_in_recovery.attr,
185 &dev_attr_adapter_port_remove.attr,
186 &dev_attr_adapter_port_rescan.attr,
187 &dev_attr_adapter_peer_wwnn.attr,
188 &dev_attr_adapter_peer_wwpn.attr,
189 &dev_attr_adapter_peer_d_id.attr,
190 &dev_attr_adapter_card_version.attr,
191 &dev_attr_adapter_lic_version.attr,
192 &dev_attr_adapter_status.attr,
193 &dev_attr_adapter_hardware_version.attr,
194 NULL
195 };
196
197 struct attribute_group zfcp_sysfs_adapter_attrs = {
198 .attrs = zfcp_adapter_attrs,
199 };
200
201 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
202 struct device_attribute *attr,
203 const char *buf, size_t count)
204 {
205 struct zfcp_port *port = dev_get_drvdata(dev);
206 struct zfcp_unit *unit;
207 u64 fcp_lun;
208 int retval = -EINVAL;
209
210 mutex_lock(&zfcp_data.config_mutex);
211 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
212 retval = -EBUSY;
213 goto out;
214 }
215
216 if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
217 goto out;
218
219 unit = zfcp_unit_enqueue(port, fcp_lun);
220 if (IS_ERR(unit))
221 goto out;
222
223 retval = 0;
224
225 zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
226 zfcp_erp_wait(unit->port->adapter);
227 zfcp_unit_put(unit);
228 out:
229 mutex_unlock(&zfcp_data.config_mutex);
230 return retval ? retval : (ssize_t) count;
231 }
232 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
233
234 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
235 struct device_attribute *attr,
236 const char *buf, size_t count)
237 {
238 struct zfcp_port *port = dev_get_drvdata(dev);
239 struct zfcp_unit *unit;
240 u64 fcp_lun;
241 int retval = 0;
242 LIST_HEAD(unit_remove_lh);
243
244 mutex_lock(&zfcp_data.config_mutex);
245 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
246 retval = -EBUSY;
247 goto out;
248 }
249
250 if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
251 retval = -EINVAL;
252 goto out;
253 }
254
255 write_lock_irq(&zfcp_data.config_lock);
256 unit = zfcp_get_unit_by_lun(port, fcp_lun);
257 if (unit) {
258 write_unlock_irq(&zfcp_data.config_lock);
259 /* wait for possible timeout during SCSI probe */
260 flush_work(&unit->scsi_work);
261 write_lock_irq(&zfcp_data.config_lock);
262
263 if (atomic_read(&unit->refcount) == 0) {
264 zfcp_unit_get(unit);
265 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
266 &unit->status);
267 list_move(&unit->list, &unit_remove_lh);
268 } else {
269 unit = NULL;
270 }
271 }
272
273 write_unlock_irq(&zfcp_data.config_lock);
274
275 if (!unit) {
276 retval = -ENXIO;
277 goto out;
278 }
279
280 zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
281 zfcp_erp_wait(unit->port->adapter);
282 zfcp_unit_put(unit);
283 zfcp_unit_dequeue(unit);
284 out:
285 mutex_unlock(&zfcp_data.config_mutex);
286 return retval ? retval : (ssize_t) count;
287 }
288 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
289
290 static struct attribute *zfcp_port_attrs[] = {
291 &dev_attr_unit_add.attr,
292 &dev_attr_unit_remove.attr,
293 &dev_attr_port_failed.attr,
294 &dev_attr_port_in_recovery.attr,
295 &dev_attr_port_status.attr,
296 &dev_attr_port_access_denied.attr,
297 NULL
298 };
299
300 /**
301 * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
302 */
303 struct attribute_group zfcp_sysfs_port_attrs = {
304 .attrs = zfcp_port_attrs,
305 };
306
307 static struct attribute *zfcp_unit_attrs[] = {
308 &dev_attr_unit_failed.attr,
309 &dev_attr_unit_in_recovery.attr,
310 &dev_attr_unit_status.attr,
311 &dev_attr_unit_access_denied.attr,
312 &dev_attr_unit_access_shared.attr,
313 &dev_attr_unit_access_readonly.attr,
314 NULL
315 };
316
317 struct attribute_group zfcp_sysfs_unit_attrs = {
318 .attrs = zfcp_unit_attrs,
319 };
320
321 #define ZFCP_DEFINE_LATENCY_ATTR(_name) \
322 static ssize_t \
323 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
324 struct device_attribute *attr, \
325 char *buf) { \
326 struct scsi_device *sdev = to_scsi_device(dev); \
327 struct zfcp_unit *unit = sdev->hostdata; \
328 struct zfcp_latencies *lat = &unit->latencies; \
329 struct zfcp_adapter *adapter = unit->port->adapter; \
330 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
331 \
332 spin_lock_bh(&lat->lock); \
333 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
334 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
335 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
336 csum = lat->_name.channel.sum * adapter->timer_ticks; \
337 cmin = lat->_name.channel.min * adapter->timer_ticks; \
338 cmax = lat->_name.channel.max * adapter->timer_ticks; \
339 cc = lat->_name.counter; \
340 spin_unlock_bh(&lat->lock); \
341 \
342 do_div(fsum, 1000); \
343 do_div(fmin, 1000); \
344 do_div(fmax, 1000); \
345 do_div(csum, 1000); \
346 do_div(cmin, 1000); \
347 do_div(cmax, 1000); \
348 \
349 return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
350 fmin, fmax, fsum, cmin, cmax, csum, cc); \
351 } \
352 static ssize_t \
353 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
354 struct device_attribute *attr, \
355 const char *buf, size_t count) \
356 { \
357 struct scsi_device *sdev = to_scsi_device(dev); \
358 struct zfcp_unit *unit = sdev->hostdata; \
359 struct zfcp_latencies *lat = &unit->latencies; \
360 unsigned long flags; \
361 \
362 spin_lock_irqsave(&lat->lock, flags); \
363 lat->_name.fabric.sum = 0; \
364 lat->_name.fabric.min = 0xFFFFFFFF; \
365 lat->_name.fabric.max = 0; \
366 lat->_name.channel.sum = 0; \
367 lat->_name.channel.min = 0xFFFFFFFF; \
368 lat->_name.channel.max = 0; \
369 lat->_name.counter = 0; \
370 spin_unlock_irqrestore(&lat->lock, flags); \
371 \
372 return (ssize_t) count; \
373 } \
374 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
375 zfcp_sysfs_unit_##_name##_latency_show, \
376 zfcp_sysfs_unit_##_name##_latency_store);
377
378 ZFCP_DEFINE_LATENCY_ATTR(read);
379 ZFCP_DEFINE_LATENCY_ATTR(write);
380 ZFCP_DEFINE_LATENCY_ATTR(cmd);
381
382 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
383 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
384 struct device_attribute *attr,\
385 char *buf) \
386 { \
387 struct scsi_device *sdev = to_scsi_device(dev); \
388 struct zfcp_unit *unit = sdev->hostdata; \
389 \
390 return sprintf(buf, _format, _value); \
391 } \
392 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
393
394 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
395 dev_name(&unit->port->adapter->ccw_device->dev));
396 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
397 (unsigned long long) unit->port->wwpn);
398 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
399 (unsigned long long) unit->fcp_lun);
400
401 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
402 &dev_attr_fcp_lun,
403 &dev_attr_wwpn,
404 &dev_attr_hba_id,
405 &dev_attr_read_latency,
406 &dev_attr_write_latency,
407 &dev_attr_cmd_latency,
408 NULL
409 };
410
411 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
412 struct device_attribute *attr,
413 char *buf)
414 {
415 struct Scsi_Host *scsi_host = dev_to_shost(dev);
416 struct fsf_qtcb_bottom_port *qtcb_port;
417 struct zfcp_adapter *adapter;
418 int retval;
419
420 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
421 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
422 return -EOPNOTSUPP;
423
424 qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
425 if (!qtcb_port)
426 return -ENOMEM;
427
428 retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
429 if (!retval)
430 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
431 qtcb_port->cb_util, qtcb_port->a_util);
432 kfree(qtcb_port);
433 return retval;
434 }
435 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
436
437 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
438 struct fsf_statistics_info *stat_inf)
439 {
440 struct Scsi_Host *scsi_host = dev_to_shost(dev);
441 struct fsf_qtcb_bottom_config *qtcb_config;
442 struct zfcp_adapter *adapter;
443 int retval;
444
445 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
446 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
447 return -EOPNOTSUPP;
448
449 qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
450 GFP_KERNEL);
451 if (!qtcb_config)
452 return -ENOMEM;
453
454 retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
455 if (!retval)
456 *stat_inf = qtcb_config->stat_info;
457
458 kfree(qtcb_config);
459 return retval;
460 }
461
462 #define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
463 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
464 struct device_attribute *attr,\
465 char *buf) \
466 { \
467 struct fsf_statistics_info stat_info; \
468 int retval; \
469 \
470 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
471 if (retval) \
472 return retval; \
473 \
474 return sprintf(buf, _format, ## _arg); \
475 } \
476 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
477
478 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
479 (unsigned long long) stat_info.input_req,
480 (unsigned long long) stat_info.output_req,
481 (unsigned long long) stat_info.control_req);
482
483 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
484 (unsigned long long) stat_info.input_mb,
485 (unsigned long long) stat_info.output_mb);
486
487 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
488 (unsigned long long) stat_info.seconds_act);
489
490 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
491 struct device_attribute *attr,
492 char *buf)
493 {
494 struct Scsi_Host *scsi_host = class_to_shost(dev);
495 struct zfcp_qdio *qdio =
496 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
497 u64 util;
498
499 spin_lock_bh(&qdio->stat_lock);
500 util = qdio->req_q_util;
501 spin_unlock_bh(&qdio->stat_lock);
502
503 return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
504 (unsigned long long)util);
505 }
506 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
507
508 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
509 &dev_attr_utilization,
510 &dev_attr_requests,
511 &dev_attr_megabytes,
512 &dev_attr_seconds_active,
513 &dev_attr_queue_full,
514 NULL
515 };
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