1 /*
2  * zfcp device driver
3  *
4  * sysfs attributes.
5  *
6  * Copyright IBM Corporation 2008, 2010
7  */
8 
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11 
12 #include <linux/slab.h>
13 #include "zfcp_ext.h"
14 
15 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
16 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
17 							    _show, _store)
18 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)	       \
19 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,	       \
20 						   struct device_attribute *at,\
21 						   char *buf)		       \
22 {									       \
23 	struct _feat_def *_feat = container_of(dev, struct _feat_def, dev);    \
24 									       \
25 	return sprintf(buf, _format, _value);				       \
26 }									       \
27 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,				       \
28 		     zfcp_sysfs_##_feat##_##_name##_show, NULL);
29 
30 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)			     \
31 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,	     \
32 						 struct device_attribute *at,\
33 						 char *buf)		     \
34 {									     \
35 	struct ccw_device *cdev = to_ccwdev(dev);			     \
36 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);	     \
37 	int i;								     \
38 									     \
39 	if (!adapter)							     \
40 		return -ENODEV;						     \
41 									     \
42 	i = sprintf(buf, _format, _value);				     \
43 	zfcp_ccw_adapter_put(adapter);					     \
44 	return i;							     \
45 }									     \
46 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,				     \
47 		     zfcp_sysfs_adapter_##_name##_show, NULL);
48 
49 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
50 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
51 		   (unsigned long long) adapter->peer_wwnn);
52 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
53 		   (unsigned long long) adapter->peer_wwpn);
54 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
55 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
56 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
57 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
58 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
59 					 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
60 
61 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
62 		 atomic_read(&port->status));
63 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
64 		 (atomic_read(&port->status) &
65 		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
66 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
67 		 (atomic_read(&port->status) &
68 		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
69 
70 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
71 		 zfcp_unit_sdev_status(unit));
72 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
73 		 (zfcp_unit_sdev_status(unit) &
74 		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
75 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
76 		 (zfcp_unit_sdev_status(unit) &
77 		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
78 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
79 		 (zfcp_unit_sdev_status(unit) &
80 		  ZFCP_STATUS_LUN_SHARED) != 0);
81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
82 		 (zfcp_unit_sdev_status(unit) &
83 		  ZFCP_STATUS_LUN_READONLY) != 0);
84 
zfcp_sysfs_port_failed_show(struct device * dev,struct device_attribute * attr,char * buf)85 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
86 					   struct device_attribute *attr,
87 					   char *buf)
88 {
89 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
90 
91 	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
92 		return sprintf(buf, "1\n");
93 
94 	return sprintf(buf, "0\n");
95 }
96 
zfcp_sysfs_port_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)97 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
98 					    struct device_attribute *attr,
99 					    const char *buf, size_t count)
100 {
101 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
102 	unsigned long val;
103 
104 	if (strict_strtoul(buf, 0, &val) || val != 0)
105 		return -EINVAL;
106 
107 	zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
108 	zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
109 	zfcp_erp_wait(port->adapter);
110 
111 	return count;
112 }
113 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
114 		     zfcp_sysfs_port_failed_show,
115 		     zfcp_sysfs_port_failed_store);
116 
zfcp_sysfs_unit_failed_show(struct device * dev,struct device_attribute * attr,char * buf)117 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
118 					   struct device_attribute *attr,
119 					   char *buf)
120 {
121 	struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
122 	struct scsi_device *sdev;
123 	unsigned int status, failed = 1;
124 
125 	sdev = zfcp_unit_sdev(unit);
126 	if (sdev) {
127 		status = atomic_read(&sdev_to_zfcp(sdev)->status);
128 		failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
129 		scsi_device_put(sdev);
130 	}
131 
132 	return sprintf(buf, "%d\n", failed);
133 }
134 
zfcp_sysfs_unit_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)135 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
136 					    struct device_attribute *attr,
137 					    const char *buf, size_t count)
138 {
139 	struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
140 	unsigned long val;
141 	struct scsi_device *sdev;
142 
143 	if (strict_strtoul(buf, 0, &val) || val != 0)
144 		return -EINVAL;
145 
146 	sdev = zfcp_unit_sdev(unit);
147 	if (sdev) {
148 		zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
149 		zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
150 				    "syufai2");
151 		zfcp_erp_wait(unit->port->adapter);
152 	} else
153 		zfcp_unit_scsi_scan(unit);
154 
155 	return count;
156 }
157 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
158 		     zfcp_sysfs_unit_failed_show,
159 		     zfcp_sysfs_unit_failed_store);
160 
zfcp_sysfs_adapter_failed_show(struct device * dev,struct device_attribute * attr,char * buf)161 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
162 					      struct device_attribute *attr,
163 					      char *buf)
164 {
165 	struct ccw_device *cdev = to_ccwdev(dev);
166 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
167 	int i;
168 
169 	if (!adapter)
170 		return -ENODEV;
171 
172 	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
173 		i = sprintf(buf, "1\n");
174 	else
175 		i = sprintf(buf, "0\n");
176 
177 	zfcp_ccw_adapter_put(adapter);
178 	return i;
179 }
180 
zfcp_sysfs_adapter_failed_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)181 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
182 					       struct device_attribute *attr,
183 					       const char *buf, size_t count)
184 {
185 	struct ccw_device *cdev = to_ccwdev(dev);
186 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
187 	unsigned long val;
188 	int retval = 0;
189 
190 	if (!adapter)
191 		return -ENODEV;
192 
193 	if (strict_strtoul(buf, 0, &val) || val != 0) {
194 		retval = -EINVAL;
195 		goto out;
196 	}
197 
198 	zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
199 	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
200 				"syafai2");
201 	zfcp_erp_wait(adapter);
202 out:
203 	zfcp_ccw_adapter_put(adapter);
204 	return retval ? retval : (ssize_t) count;
205 }
206 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
207 		     zfcp_sysfs_adapter_failed_show,
208 		     zfcp_sysfs_adapter_failed_store);
209 
zfcp_sysfs_port_rescan_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)210 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
211 					    struct device_attribute *attr,
212 					    const char *buf, size_t count)
213 {
214 	struct ccw_device *cdev = to_ccwdev(dev);
215 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
216 
217 	if (!adapter)
218 		return -ENODEV;
219 
220 	/* sync the user-space- with the kernel-invocation of scan_work */
221 	queue_work(adapter->work_queue, &adapter->scan_work);
222 	flush_work(&adapter->scan_work);
223 	zfcp_ccw_adapter_put(adapter);
224 
225 	return (ssize_t) count;
226 }
227 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
228 		     zfcp_sysfs_port_rescan_store);
229 
230 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
231 
zfcp_sysfs_port_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)232 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
233 					    struct device_attribute *attr,
234 					    const char *buf, size_t count)
235 {
236 	struct ccw_device *cdev = to_ccwdev(dev);
237 	struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
238 	struct zfcp_port *port;
239 	u64 wwpn;
240 	int retval = -EINVAL;
241 
242 	if (!adapter)
243 		return -ENODEV;
244 
245 	if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
246 		goto out;
247 
248 	port = zfcp_get_port_by_wwpn(adapter, wwpn);
249 	if (!port)
250 		goto out;
251 	else
252 		retval = 0;
253 
254 	mutex_lock(&zfcp_sysfs_port_units_mutex);
255 	if (atomic_read(&port->units) > 0) {
256 		retval = -EBUSY;
257 		mutex_unlock(&zfcp_sysfs_port_units_mutex);
258 		goto out;
259 	}
260 	/* port is about to be removed, so no more unit_add */
261 	atomic_set(&port->units, -1);
262 	mutex_unlock(&zfcp_sysfs_port_units_mutex);
263 
264 	write_lock_irq(&adapter->port_list_lock);
265 	list_del(&port->list);
266 	write_unlock_irq(&adapter->port_list_lock);
267 
268 	put_device(&port->dev);
269 
270 	zfcp_erp_port_shutdown(port, 0, "syprs_1");
271 	zfcp_device_unregister(&port->dev, &zfcp_sysfs_port_attrs);
272  out:
273 	zfcp_ccw_adapter_put(adapter);
274 	return retval ? retval : (ssize_t) count;
275 }
276 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
277 		     zfcp_sysfs_port_remove_store);
278 
279 static struct attribute *zfcp_adapter_attrs[] = {
280 	&dev_attr_adapter_failed.attr,
281 	&dev_attr_adapter_in_recovery.attr,
282 	&dev_attr_adapter_port_remove.attr,
283 	&dev_attr_adapter_port_rescan.attr,
284 	&dev_attr_adapter_peer_wwnn.attr,
285 	&dev_attr_adapter_peer_wwpn.attr,
286 	&dev_attr_adapter_peer_d_id.attr,
287 	&dev_attr_adapter_card_version.attr,
288 	&dev_attr_adapter_lic_version.attr,
289 	&dev_attr_adapter_status.attr,
290 	&dev_attr_adapter_hardware_version.attr,
291 	NULL
292 };
293 
294 struct attribute_group zfcp_sysfs_adapter_attrs = {
295 	.attrs = zfcp_adapter_attrs,
296 };
297 
zfcp_sysfs_unit_add_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)298 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
299 					 struct device_attribute *attr,
300 					 const char *buf, size_t count)
301 {
302 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
303 	u64 fcp_lun;
304 	int retval;
305 
306 	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
307 		return -EINVAL;
308 
309 	retval = zfcp_unit_add(port, fcp_lun);
310 	if (retval)
311 		return retval;
312 
313 	return count;
314 }
315 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
316 
zfcp_sysfs_unit_remove_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)317 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
318 					    struct device_attribute *attr,
319 					    const char *buf, size_t count)
320 {
321 	struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
322 	u64 fcp_lun;
323 
324 	if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
325 		return -EINVAL;
326 
327 	if (zfcp_unit_remove(port, fcp_lun))
328 		return -EINVAL;
329 
330 	return count;
331 }
332 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
333 
334 static struct attribute *zfcp_port_attrs[] = {
335 	&dev_attr_unit_add.attr,
336 	&dev_attr_unit_remove.attr,
337 	&dev_attr_port_failed.attr,
338 	&dev_attr_port_in_recovery.attr,
339 	&dev_attr_port_status.attr,
340 	&dev_attr_port_access_denied.attr,
341 	NULL
342 };
343 
344 /**
345  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
346  */
347 struct attribute_group zfcp_sysfs_port_attrs = {
348 	.attrs = zfcp_port_attrs,
349 };
350 
351 static struct attribute *zfcp_unit_attrs[] = {
352 	&dev_attr_unit_failed.attr,
353 	&dev_attr_unit_in_recovery.attr,
354 	&dev_attr_unit_status.attr,
355 	&dev_attr_unit_access_denied.attr,
356 	&dev_attr_unit_access_shared.attr,
357 	&dev_attr_unit_access_readonly.attr,
358 	NULL
359 };
360 
361 struct attribute_group zfcp_sysfs_unit_attrs = {
362 	.attrs = zfcp_unit_attrs,
363 };
364 
365 #define ZFCP_DEFINE_LATENCY_ATTR(_name) 				\
366 static ssize_t								\
367 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,		\
368 				       struct device_attribute *attr,	\
369 				       char *buf) {			\
370 	struct scsi_device *sdev = to_scsi_device(dev);			\
371 	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		\
372 	struct zfcp_latencies *lat = &zfcp_sdev->latencies;		\
373 	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;	\
374 	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;	\
375 									\
376 	spin_lock_bh(&lat->lock);					\
377 	fsum = lat->_name.fabric.sum * adapter->timer_ticks;		\
378 	fmin = lat->_name.fabric.min * adapter->timer_ticks;		\
379 	fmax = lat->_name.fabric.max * adapter->timer_ticks;		\
380 	csum = lat->_name.channel.sum * adapter->timer_ticks;		\
381 	cmin = lat->_name.channel.min * adapter->timer_ticks;		\
382 	cmax = lat->_name.channel.max * adapter->timer_ticks;		\
383 	cc  = lat->_name.counter;					\
384 	spin_unlock_bh(&lat->lock);					\
385 									\
386 	do_div(fsum, 1000);						\
387 	do_div(fmin, 1000);						\
388 	do_div(fmax, 1000);						\
389 	do_div(csum, 1000);						\
390 	do_div(cmin, 1000);						\
391 	do_div(cmax, 1000);						\
392 									\
393 	return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",	\
394 		       fmin, fmax, fsum, cmin, cmax, csum, cc); 	\
395 }									\
396 static ssize_t								\
397 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,		\
398 					struct device_attribute *attr,	\
399 					const char *buf, size_t count)	\
400 {									\
401 	struct scsi_device *sdev = to_scsi_device(dev);			\
402 	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		\
403 	struct zfcp_latencies *lat = &zfcp_sdev->latencies;		\
404 	unsigned long flags;						\
405 									\
406 	spin_lock_irqsave(&lat->lock, flags);				\
407 	lat->_name.fabric.sum = 0;					\
408 	lat->_name.fabric.min = 0xFFFFFFFF;				\
409 	lat->_name.fabric.max = 0;					\
410 	lat->_name.channel.sum = 0;					\
411 	lat->_name.channel.min = 0xFFFFFFFF;				\
412 	lat->_name.channel.max = 0;					\
413 	lat->_name.counter = 0;						\
414 	spin_unlock_irqrestore(&lat->lock, flags);			\
415 									\
416 	return (ssize_t) count;						\
417 }									\
418 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,			\
419 		   zfcp_sysfs_unit_##_name##_latency_show,		\
420 		   zfcp_sysfs_unit_##_name##_latency_store);
421 
422 ZFCP_DEFINE_LATENCY_ATTR(read);
423 ZFCP_DEFINE_LATENCY_ATTR(write);
424 ZFCP_DEFINE_LATENCY_ATTR(cmd);
425 
426 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)			\
427 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,	\
428 					      struct device_attribute *attr,\
429 					      char *buf)                 \
430 {                                                                        \
431 	struct scsi_device *sdev = to_scsi_device(dev);			 \
432 	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);		 \
433 	struct zfcp_port *port = zfcp_sdev->port;			 \
434 									 \
435 	return sprintf(buf, _format, _value);                            \
436 }                                                                        \
437 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
438 
439 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
440 		      dev_name(&port->adapter->ccw_device->dev));
441 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
442 		      (unsigned long long) port->wwpn);
443 
zfcp_sysfs_scsi_fcp_lun_show(struct device * dev,struct device_attribute * attr,char * buf)444 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
445 					    struct device_attribute *attr,
446 					    char *buf)
447 {
448 	struct scsi_device *sdev = to_scsi_device(dev);
449 
450 	return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
451 }
452 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
453 
454 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
455 	&dev_attr_fcp_lun,
456 	&dev_attr_wwpn,
457 	&dev_attr_hba_id,
458 	&dev_attr_read_latency,
459 	&dev_attr_write_latency,
460 	&dev_attr_cmd_latency,
461 	NULL
462 };
463 
zfcp_sysfs_adapter_util_show(struct device * dev,struct device_attribute * attr,char * buf)464 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
465 					    struct device_attribute *attr,
466 					    char *buf)
467 {
468 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
469 	struct fsf_qtcb_bottom_port *qtcb_port;
470 	struct zfcp_adapter *adapter;
471 	int retval;
472 
473 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
474 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
475 		return -EOPNOTSUPP;
476 
477 	qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
478 	if (!qtcb_port)
479 		return -ENOMEM;
480 
481 	retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
482 	if (!retval)
483 		retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
484 				 qtcb_port->cb_util, qtcb_port->a_util);
485 	kfree(qtcb_port);
486 	return retval;
487 }
488 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
489 
zfcp_sysfs_adapter_ex_config(struct device * dev,struct fsf_statistics_info * stat_inf)490 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
491 					struct fsf_statistics_info *stat_inf)
492 {
493 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
494 	struct fsf_qtcb_bottom_config *qtcb_config;
495 	struct zfcp_adapter *adapter;
496 	int retval;
497 
498 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
499 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
500 		return -EOPNOTSUPP;
501 
502 	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
503 			      GFP_KERNEL);
504 	if (!qtcb_config)
505 		return -ENOMEM;
506 
507 	retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
508 	if (!retval)
509 		*stat_inf = qtcb_config->stat_info;
510 
511 	kfree(qtcb_config);
512 	return retval;
513 }
514 
515 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)			\
516 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,	\
517 						 struct device_attribute *attr,\
518 						 char *buf)		\
519 {									\
520 	struct fsf_statistics_info stat_info;				\
521 	int retval;							\
522 									\
523 	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);		\
524 	if (retval)							\
525 		return retval;						\
526 									\
527 	return sprintf(buf, _format, ## _arg);				\
528 }									\
529 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
530 
531 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
532 		(unsigned long long) stat_info.input_req,
533 		(unsigned long long) stat_info.output_req,
534 		(unsigned long long) stat_info.control_req);
535 
536 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
537 		(unsigned long long) stat_info.input_mb,
538 		(unsigned long long) stat_info.output_mb);
539 
540 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
541 		(unsigned long long) stat_info.seconds_act);
542 
zfcp_sysfs_adapter_q_full_show(struct device * dev,struct device_attribute * attr,char * buf)543 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
544 					      struct device_attribute *attr,
545 					      char *buf)
546 {
547 	struct Scsi_Host *scsi_host = class_to_shost(dev);
548 	struct zfcp_qdio *qdio =
549 		((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
550 	u64 util;
551 
552 	spin_lock_bh(&qdio->stat_lock);
553 	util = qdio->req_q_util;
554 	spin_unlock_bh(&qdio->stat_lock);
555 
556 	return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
557 		       (unsigned long long)util);
558 }
559 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
560 
561 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
562 	&dev_attr_utilization,
563 	&dev_attr_requests,
564 	&dev_attr_megabytes,
565 	&dev_attr_seconds_active,
566 	&dev_attr_queue_full,
567 	NULL
568 };
569