smc_ism.c

  1// SPDX-License-Identifier: GPL-2.0
  2/* Shared Memory Communications Direct over ISM devices (SMC-D)
  3 *
  4 * Functions for ISM device.
  5 *
  6 * Copyright IBM Corp. 2018
  7 */
  8
  9#include <linux/if_vlan.h>
 10#include <linux/spinlock.h>
 11#include <linux/mutex.h>
 12#include <linux/slab.h>
 13#include <asm/page.h>
 14
 15#include "smc.h"
 16#include "smc_core.h"
 17#include "smc_ism.h"
 18#include "smc_pnet.h"
 19#include "smc_netlink.h"
 20#include "linux/dibs.h"
 21
 22struct smcd_dev_list smcd_dev_list = {
 23	.list = LIST_HEAD_INIT(smcd_dev_list.list),
 24	.mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
 25};
 26
 27static bool smc_ism_v2_capable;
 28static u8 smc_ism_v2_system_eid[SMC_MAX_EID_LEN];
 29
 30static void smcd_register_dev(struct dibs_dev *dibs);
 31static void smcd_unregister_dev(struct dibs_dev *dibs);
 32static void smcd_handle_event(struct dibs_dev *dibs,
 33			      const struct dibs_event *event);
 34static void smcd_handle_irq(struct dibs_dev *dibs, unsigned int dmbno,
 35			    u16 dmbemask);
 36
 37static struct dibs_client_ops smc_client_ops = {
 38	.add_dev = smcd_register_dev,
 39	.del_dev = smcd_unregister_dev,
 40	.handle_event = smcd_handle_event,
 41	.handle_irq = smcd_handle_irq,
 42};
 43
 44static struct dibs_client smc_dibs_client = {
 45	.name = "SMC-D",
 46	.ops = &smc_client_ops,
 47};
 48
 49static void smc_ism_create_system_eid(void)
 50{
 51	struct smc_ism_seid *seid =
 52		(struct smc_ism_seid *)smc_ism_v2_system_eid;
 53#if IS_ENABLED(CONFIG_S390)
 54	struct cpuid id;
 55	u16 ident_tail;
 56	char tmp[5];
 57
 58	memcpy(seid->seid_string, "IBM-SYSZ-ISMSEID00000000", 24);
 59	get_cpu_id(&id);
 60	ident_tail = (u16)(id.ident & SMC_ISM_IDENT_MASK);
 61	snprintf(tmp, 5, "%04X", ident_tail);
 62	memcpy(seid->serial_number, tmp, 4);
 63	snprintf(tmp, 5, "%04X", id.machine);
 64	memcpy(seid->type, tmp, 4);
 65#else
 66	memset(seid, 0, SMC_MAX_EID_LEN);
 67#endif
 68}
 69
 70/* Test if an ISM communication is possible - same CPC */
 71int smc_ism_cantalk(struct smcd_gid *peer_gid, unsigned short vlan_id,
 72		    struct smcd_dev *smcd)
 73{
 74	struct dibs_dev *dibs = smcd->dibs;
 75	uuid_t ism_rgid;
 76
 77	copy_to_dibsgid(&ism_rgid, peer_gid);
 78	return dibs->ops->query_remote_gid(dibs, &ism_rgid, vlan_id ? 1 : 0,
 79					  vlan_id);
 80}
 81
 82void smc_ism_get_system_eid(u8 **eid)
 83{
 84	if (!smc_ism_v2_capable)
 85		*eid = NULL;
 86	else
 87		*eid = smc_ism_v2_system_eid;
 88}
 89
 90u16 smc_ism_get_chid(struct smcd_dev *smcd)
 91{
 92	return smcd->dibs->ops->get_fabric_id(smcd->dibs);
 93}
 94
 95/* HW supports ISM V2 and thus System EID is defined */
 96bool smc_ism_is_v2_capable(void)
 97{
 98	return smc_ism_v2_capable;
 99}
100
101void smc_ism_set_v2_capable(void)
102{
103	smc_ism_v2_capable = true;
104}
105
106/* Set a connection using this DMBE. */
107void smc_ism_set_conn(struct smc_connection *conn)
108{
109	unsigned long flags;
110
111	spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
112	conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = conn;
113	spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
114}
115
116/* Unset a connection using this DMBE. */
117void smc_ism_unset_conn(struct smc_connection *conn)
118{
119	unsigned long flags;
120
121	if (!conn->rmb_desc)
122		return;
123
124	spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
125	conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = NULL;
126	spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
127}
128
129/* Register a VLAN identifier with the ISM device. Use a reference count
130 * and add a VLAN identifier only when the first DMB using this VLAN is
131 * registered.
132 */
133int smc_ism_get_vlan(struct smcd_dev *smcd, unsigned short vlanid)
134{
135	struct smc_ism_vlanid *new_vlan, *vlan;
136	unsigned long flags;
137	int rc = 0;
138
139	if (!vlanid)			/* No valid vlan id */
140		return -EINVAL;
141	if (!smcd->dibs->ops->add_vlan_id)
142		return -EOPNOTSUPP;
143
144	/* create new vlan entry, in case we need it */
145	new_vlan = kzalloc(sizeof(*new_vlan), GFP_KERNEL);
146	if (!new_vlan)
147		return -ENOMEM;
148	new_vlan->vlanid = vlanid;
149	refcount_set(&new_vlan->refcnt, 1);
150
151	/* if there is an existing entry, increase count and return */
152	spin_lock_irqsave(&smcd->lock, flags);
153	list_for_each_entry(vlan, &smcd->vlan, list) {
154		if (vlan->vlanid == vlanid) {
155			refcount_inc(&vlan->refcnt);
156			kfree(new_vlan);
157			goto out;
158		}
159	}
160
161	/* no existing entry found.
162	 * add new entry to device; might fail, e.g., if HW limit reached
163	 */
164	if (smcd->dibs->ops->add_vlan_id(smcd->dibs, vlanid)) {
165		kfree(new_vlan);
166		rc = -EIO;
167		goto out;
168	}
169	list_add_tail(&new_vlan->list, &smcd->vlan);
170out:
171	spin_unlock_irqrestore(&smcd->lock, flags);
172	return rc;
173}
174
175/* Unregister a VLAN identifier with the ISM device. Use a reference count
176 * and remove a VLAN identifier only when the last DMB using this VLAN is
177 * unregistered.
178 */
179int smc_ism_put_vlan(struct smcd_dev *smcd, unsigned short vlanid)
180{
181	struct smc_ism_vlanid *vlan;
182	unsigned long flags;
183	bool found = false;
184	int rc = 0;
185
186	if (!vlanid)			/* No valid vlan id */
187		return -EINVAL;
188	if (!smcd->dibs->ops->del_vlan_id)
189		return -EOPNOTSUPP;
190
191	spin_lock_irqsave(&smcd->lock, flags);
192	list_for_each_entry(vlan, &smcd->vlan, list) {
193		if (vlan->vlanid == vlanid) {
194			if (!refcount_dec_and_test(&vlan->refcnt))
195				goto out;
196			found = true;
197			break;
198		}
199	}
200	if (!found) {
201		rc = -ENOENT;
202		goto out;		/* VLAN id not in table */
203	}
204
205	/* Found and the last reference just gone */
206	if (smcd->dibs->ops->del_vlan_id(smcd->dibs, vlanid))
207		rc = -EIO;
208	list_del(&vlan->list);
209	kfree(vlan);
210out:
211	spin_unlock_irqrestore(&smcd->lock, flags);
212	return rc;
213}
214
215void smc_ism_unregister_dmb(struct smcd_dev *smcd,
216			    struct smc_buf_desc *dmb_desc)
217{
218	struct dibs_dmb dmb;
219
220	if (!dmb_desc->dma_addr)
221		return;
222
223	memset(&dmb, 0, sizeof(dmb));
224	dmb.dmb_tok = dmb_desc->token;
225	dmb.idx = dmb_desc->sba_idx;
226	dmb.cpu_addr = dmb_desc->cpu_addr;
227	dmb.dma_addr = dmb_desc->dma_addr;
228	dmb.dmb_len = dmb_desc->len;
229
230	smcd->dibs->ops->unregister_dmb(smcd->dibs, &dmb);
231
232	return;
233}
234
235int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
236			 struct smc_buf_desc *dmb_desc)
237{
238	struct dibs_dev *dibs;
239	struct dibs_dmb dmb;
240	int rc;
241
242	memset(&dmb, 0, sizeof(dmb));
243	dmb.dmb_len = dmb_len;
244	dmb.idx = dmb_desc->sba_idx;
245	dmb.vlan_id = lgr->vlan_id;
246	copy_to_dibsgid(&dmb.rgid, &lgr->peer_gid);
247
248	dibs = lgr->smcd->dibs;
249	rc = dibs->ops->register_dmb(dibs, &dmb, &smc_dibs_client);
250	if (!rc) {
251		dmb_desc->sba_idx = dmb.idx;
252		dmb_desc->token = dmb.dmb_tok;
253		dmb_desc->cpu_addr = dmb.cpu_addr;
254		dmb_desc->dma_addr = dmb.dma_addr;
255		dmb_desc->len = dmb.dmb_len;
256	}
257	return rc;
258}
259
260bool smc_ism_support_dmb_nocopy(struct smcd_dev *smcd)
261{
262	/* for now only loopback-ism supports
263	 * merging sndbuf with peer DMB to avoid
264	 * data copies between them.
265	 */
266	return (smcd->dibs->ops->support_mmapped_rdmb &&
267		smcd->dibs->ops->support_mmapped_rdmb(smcd->dibs));
268}
269
270int smc_ism_attach_dmb(struct smcd_dev *dev, u64 token,
271		       struct smc_buf_desc *dmb_desc)
272{
273	struct dibs_dmb dmb;
274	int rc = 0;
275
276	if (!dev->dibs->ops->attach_dmb)
277		return -EINVAL;
278
279	memset(&dmb, 0, sizeof(dmb));
280	dmb.dmb_tok = token;
281	rc = dev->dibs->ops->attach_dmb(dev->dibs, &dmb);
282	if (!rc) {
283		dmb_desc->sba_idx = dmb.idx;
284		dmb_desc->token = dmb.dmb_tok;
285		dmb_desc->cpu_addr = dmb.cpu_addr;
286		dmb_desc->dma_addr = dmb.dma_addr;
287		dmb_desc->len = dmb.dmb_len;
288		dmb_desc->is_attached = true;
289	}
290	return rc;
291}
292
293int smc_ism_detach_dmb(struct smcd_dev *dev, u64 token)
294{
295	if (!dev->dibs->ops->detach_dmb)
296		return -EINVAL;
297
298	return dev->dibs->ops->detach_dmb(dev->dibs, token);
299}
300
301static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
302				  struct sk_buff *skb,
303				  struct netlink_callback *cb)
304{
305	char smc_pnet[SMC_MAX_PNETID_LEN + 1];
306	struct smc_pci_dev smc_pci_dev;
307	struct nlattr *port_attrs;
308	struct dibs_dev *dibs;
309	struct nlattr *attrs;
310	int use_cnt = 0;
311	void *nlh;
312
313	dibs = smcd->dibs;
314	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
315			  &smc_gen_nl_family, NLM_F_MULTI,
316			  SMC_NETLINK_GET_DEV_SMCD);
317	if (!nlh)
318		goto errmsg;
319	attrs = nla_nest_start(skb, SMC_GEN_DEV_SMCD);
320	if (!attrs)
321		goto errout;
322	use_cnt = atomic_read(&smcd->lgr_cnt);
323	if (nla_put_u32(skb, SMC_NLA_DEV_USE_CNT, use_cnt))
324		goto errattr;
325	if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
326		goto errattr;
327	memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
328	smc_set_pci_values(to_pci_dev(dibs->dev.parent), &smc_pci_dev);
329	if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
330		goto errattr;
331	if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
332		goto errattr;
333	if (nla_put_u16(skb, SMC_NLA_DEV_PCI_VENDOR, smc_pci_dev.pci_vendor))
334		goto errattr;
335	if (nla_put_u16(skb, SMC_NLA_DEV_PCI_DEVICE, smc_pci_dev.pci_device))
336		goto errattr;
337	if (nla_put_string(skb, SMC_NLA_DEV_PCI_ID, smc_pci_dev.pci_id))
338		goto errattr;
339
340	port_attrs = nla_nest_start(skb, SMC_NLA_DEV_PORT);
341	if (!port_attrs)
342		goto errattr;
343	if (nla_put_u8(skb, SMC_NLA_DEV_PORT_PNET_USR, smcd->pnetid_by_user))
344		goto errportattr;
345	memcpy(smc_pnet, smcd->pnetid, SMC_MAX_PNETID_LEN);
346	smc_pnet[SMC_MAX_PNETID_LEN] = 0;
347	if (nla_put_string(skb, SMC_NLA_DEV_PORT_PNETID, smc_pnet))
348		goto errportattr;
349
350	nla_nest_end(skb, port_attrs);
351	nla_nest_end(skb, attrs);
352	genlmsg_end(skb, nlh);
353	return 0;
354
355errportattr:
356	nla_nest_cancel(skb, port_attrs);
357errattr:
358	nla_nest_cancel(skb, attrs);
359errout:
360	nlmsg_cancel(skb, nlh);
361errmsg:
362	return -EMSGSIZE;
363}
364
365static void smc_nl_prep_smcd_dev(struct smcd_dev_list *dev_list,
366				 struct sk_buff *skb,
367				 struct netlink_callback *cb)
368{
369	struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
370	int snum = cb_ctx->pos[0];
371	struct smcd_dev *smcd;
372	int num = 0;
373
374	mutex_lock(&dev_list->mutex);
375	list_for_each_entry(smcd, &dev_list->list, list) {
376		if (num < snum)
377			goto next;
378		if (smc_ism_is_loopback(smcd->dibs))
379			goto next;
380		if (smc_nl_handle_smcd_dev(smcd, skb, cb))
381			goto errout;
382next:
383		num++;
384	}
385errout:
386	mutex_unlock(&dev_list->mutex);
387	cb_ctx->pos[0] = num;
388}
389
390int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb)
391{
392	smc_nl_prep_smcd_dev(&smcd_dev_list, skb, cb);
393	return skb->len;
394}
395
396struct smc_ism_event_work {
397	struct work_struct work;
398	struct smcd_dev *smcd;
399	struct dibs_event event;
400};
401
402#define ISM_EVENT_REQUEST		0x0001
403#define ISM_EVENT_RESPONSE		0x0002
404#define ISM_EVENT_REQUEST_IR		0x00000001
405#define ISM_EVENT_CODE_SHUTDOWN		0x80
406#define ISM_EVENT_CODE_TESTLINK		0x83
407
408union smcd_sw_event_info {
409	u64	info;
410	struct {
411		u8		uid[SMC_LGR_ID_SIZE];
412		unsigned short	vlan_id;
413		u16		code;
414	};
415};
416
417static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
418{
419	struct dibs_dev *dibs = wrk->smcd->dibs;
420	union smcd_sw_event_info ev_info;
421	struct smcd_gid peer_gid;
422	uuid_t ism_rgid;
423
424	copy_to_smcdgid(&peer_gid, &wrk->event.gid);
425	ev_info.info = wrk->event.data;
426	switch (wrk->event.subtype) {
427	case ISM_EVENT_CODE_SHUTDOWN:	/* Peer shut down DMBs */
428		smc_smcd_terminate(wrk->smcd, &peer_gid, ev_info.vlan_id);
429		break;
430	case ISM_EVENT_CODE_TESTLINK:	/* Activity timer */
431		if (ev_info.code == ISM_EVENT_REQUEST &&
432		    dibs->ops->signal_event) {
433			ev_info.code = ISM_EVENT_RESPONSE;
434			copy_to_dibsgid(&ism_rgid, &peer_gid);
435			dibs->ops->signal_event(dibs, &ism_rgid,
436					       ISM_EVENT_REQUEST_IR,
437					       ISM_EVENT_CODE_TESTLINK,
438					       ev_info.info);
439		}
440		break;
441	}
442}
443
444/* worker for SMC-D events */
445static void smc_ism_event_work(struct work_struct *work)
446{
447	struct smc_ism_event_work *wrk =
448		container_of(work, struct smc_ism_event_work, work);
449	struct smcd_gid smcd_gid;
450
451	copy_to_smcdgid(&smcd_gid, &wrk->event.gid);
452
453	switch (wrk->event.type) {
454	case DIBS_DEV_EVENT: /* GID event, token is peer GID */
455		smc_smcd_terminate(wrk->smcd, &smcd_gid, VLAN_VID_MASK);
456		break;
457	case DIBS_BUF_EVENT:
458		break;
459	case DIBS_SW_EVENT: /* Software defined event */
460		smcd_handle_sw_event(wrk);
461		break;
462	}
463	kfree(wrk);
464}
465
466static struct smcd_dev *smcd_alloc_dev(const char *name, int max_dmbs)
467{
468	struct smcd_dev *smcd;
469
470	smcd = kzalloc(sizeof(*smcd), GFP_KERNEL);
471	if (!smcd)
472		return NULL;
473	smcd->conn = kcalloc(max_dmbs, sizeof(struct smc_connection *),
474			     GFP_KERNEL);
475	if (!smcd->conn)
476		goto free_smcd;
477
478	smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
479						 WQ_MEM_RECLAIM, name);
480	if (!smcd->event_wq)
481		goto free_conn;
482
483	spin_lock_init(&smcd->lock);
484	spin_lock_init(&smcd->lgr_lock);
485	INIT_LIST_HEAD(&smcd->vlan);
486	INIT_LIST_HEAD(&smcd->lgr_list);
487	init_waitqueue_head(&smcd->lgrs_deleted);
488	return smcd;
489
490free_conn:
491	kfree(smcd->conn);
492free_smcd:
493	kfree(smcd);
494	return NULL;
495}
496
497static void smcd_register_dev(struct dibs_dev *dibs)
498{
499	struct smcd_dev *smcd, *fentry;
500	int max_dmbs;
501
502	max_dmbs = dibs->ops->max_dmbs();
503
504	smcd = smcd_alloc_dev(dev_name(&dibs->dev), max_dmbs);
505	if (!smcd)
506		return;
507
508	smcd->dibs = dibs;
509	dibs_set_priv(dibs, &smc_dibs_client, smcd);
510
511	if (smc_pnetid_by_dev_port(dibs->dev.parent, 0, smcd->pnetid))
512		smc_pnetid_by_table_smcd(smcd);
513
514	if (smc_ism_is_loopback(dibs) ||
515	    (dibs->ops->add_vlan_id &&
516	     !dibs->ops->add_vlan_id(dibs, ISM_RESERVED_VLANID))) {
517		smc_ism_set_v2_capable();
518	}
519
520	mutex_lock(&smcd_dev_list.mutex);
521	/* sort list:
522	 * - devices without pnetid before devices with pnetid;
523	 * - loopback-ism always at the very beginning;
524	 */
525	if (!smcd->pnetid[0]) {
526		fentry = list_first_entry_or_null(&smcd_dev_list.list,
527						  struct smcd_dev, list);
528		if (fentry && smc_ism_is_loopback(fentry->dibs))
529			list_add(&smcd->list, &fentry->list);
530		else
531			list_add(&smcd->list, &smcd_dev_list.list);
532	} else {
533		list_add_tail(&smcd->list, &smcd_dev_list.list);
534	}
535	mutex_unlock(&smcd_dev_list.mutex);
536
537	if (smc_pnet_is_pnetid_set(smcd->pnetid))
538		pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n",
539				    dev_name(&dibs->dev), smcd->pnetid,
540				    smcd->pnetid_by_user ?
541					" (user defined)" :
542					"");
543	else
544		pr_warn_ratelimited("smc: adding smcd device %s without pnetid\n",
545				    dev_name(&dibs->dev));
546	return;
547}
548
549static void smcd_unregister_dev(struct dibs_dev *dibs)
550{
551	struct smcd_dev *smcd = dibs_get_priv(dibs, &smc_dibs_client);
552
553	pr_warn_ratelimited("smc: removing smcd device %s\n",
554			    dev_name(&dibs->dev));
555	smcd->going_away = 1;
556	smc_smcd_terminate_all(smcd);
557	mutex_lock(&smcd_dev_list.mutex);
558	list_del_init(&smcd->list);
559	mutex_unlock(&smcd_dev_list.mutex);
560	destroy_workqueue(smcd->event_wq);
561	kfree(smcd->conn);
562	kfree(smcd);
563}
564
565/* SMCD Device event handler. Called from ISM device interrupt handler.
566 * Parameters are ism device pointer,
567 * - event->type (0 --> DMB, 1 --> GID),
568 * - event->code (event code),
569 * - event->tok (either DMB token when event type 0, or GID when event type 1)
570 * - event->time (time of day)
571 * - event->info (debug info).
572 *
573 * Context:
574 * - Function called in IRQ context from ISM device driver event handler.
575 */
576static void smcd_handle_event(struct dibs_dev *dibs,
577			      const struct dibs_event *event)
578{
579	struct smcd_dev *smcd = dibs_get_priv(dibs, &smc_dibs_client);
580	struct smc_ism_event_work *wrk;
581
582	if (smcd->going_away)
583		return;
584	/* copy event to event work queue, and let it be handled there */
585	wrk = kmalloc(sizeof(*wrk), GFP_ATOMIC);
586	if (!wrk)
587		return;
588	INIT_WORK(&wrk->work, smc_ism_event_work);
589	wrk->smcd = smcd;
590	wrk->event = *event;
591	queue_work(smcd->event_wq, &wrk->work);
592}
593
594/* SMCD Device interrupt handler. Called from ISM device interrupt handler.
595 * Parameters are the ism device pointer, DMB number, and the DMBE bitmask.
596 * Find the connection and schedule the tasklet for this connection.
597 *
598 * Context:
599 * - Function called in IRQ context from ISM device driver IRQ handler.
600 */
601static void smcd_handle_irq(struct dibs_dev *dibs, unsigned int dmbno,
602			    u16 dmbemask)
603{
604	struct smcd_dev *smcd = dibs_get_priv(dibs, &smc_dibs_client);
605	struct smc_connection *conn = NULL;
606	unsigned long flags;
607
608	spin_lock_irqsave(&smcd->lock, flags);
609	conn = smcd->conn[dmbno];
610	if (conn && !conn->killed)
611		tasklet_schedule(&conn->rx_tsklet);
612	spin_unlock_irqrestore(&smcd->lock, flags);
613}
614
615int smc_ism_signal_shutdown(struct smc_link_group *lgr)
616{
617	int rc = 0;
618	union smcd_sw_event_info ev_info;
619	uuid_t ism_rgid;
620
621	if (lgr->peer_shutdown)
622		return 0;
623	if (!lgr->smcd->dibs->ops->signal_event)
624		return 0;
625
626	memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
627	ev_info.vlan_id = lgr->vlan_id;
628	ev_info.code = ISM_EVENT_REQUEST;
629	copy_to_dibsgid(&ism_rgid, &lgr->peer_gid);
630	rc = lgr->smcd->dibs->ops->signal_event(lgr->smcd->dibs, &ism_rgid,
631					  ISM_EVENT_REQUEST_IR,
632					  ISM_EVENT_CODE_SHUTDOWN,
633					  ev_info.info);
634	return rc;
635}
636
637int smc_ism_init(void)
638{
639	int rc = 0;
640
641	smc_ism_v2_capable = false;
642	smc_ism_create_system_eid();
643
644	rc = dibs_register_client(&smc_dibs_client);
645	return rc;
646}
647
648void smc_ism_exit(void)
649{
650	dibs_unregister_client(&smc_dibs_client);
651}