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/ism.h"
21
22 struct 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
27 static bool smc_ism_v2_capable;
28 static u8 smc_ism_v2_system_eid[SMC_MAX_EID_LEN];
29
30 #if IS_ENABLED(CONFIG_ISM)
31 static void smcd_register_dev(struct ism_dev *ism);
32 static void smcd_unregister_dev(struct ism_dev *ism);
33 static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event);
34 static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
35 u16 dmbemask);
36
37 static struct ism_client smc_ism_client = {
38 .name = "SMC-D",
39 .add = smcd_register_dev,
40 .remove = smcd_unregister_dev,
41 .handle_event = smcd_handle_event,
42 .handle_irq = smcd_handle_irq,
43 };
44 #endif
45
46 /* Test if an ISM communication is possible - same CPC */
smc_ism_cantalk(struct smcd_gid * peer_gid,unsigned short vlan_id,struct smcd_dev * smcd)47 int smc_ism_cantalk(struct smcd_gid *peer_gid, unsigned short vlan_id,
48 struct smcd_dev *smcd)
49 {
50 return smcd->ops->query_remote_gid(smcd, peer_gid, vlan_id ? 1 : 0,
51 vlan_id);
52 }
53
smc_ism_get_system_eid(u8 ** eid)54 void smc_ism_get_system_eid(u8 **eid)
55 {
56 if (!smc_ism_v2_capable)
57 *eid = NULL;
58 else
59 *eid = smc_ism_v2_system_eid;
60 }
61
smc_ism_get_chid(struct smcd_dev * smcd)62 u16 smc_ism_get_chid(struct smcd_dev *smcd)
63 {
64 return smcd->ops->get_chid(smcd);
65 }
66
67 /* HW supports ISM V2 and thus System EID is defined */
smc_ism_is_v2_capable(void)68 bool smc_ism_is_v2_capable(void)
69 {
70 return smc_ism_v2_capable;
71 }
72
73 /* Set a connection using this DMBE. */
smc_ism_set_conn(struct smc_connection * conn)74 void smc_ism_set_conn(struct smc_connection *conn)
75 {
76 unsigned long flags;
77
78 spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
79 conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = conn;
80 spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
81 }
82
83 /* Unset a connection using this DMBE. */
smc_ism_unset_conn(struct smc_connection * conn)84 void smc_ism_unset_conn(struct smc_connection *conn)
85 {
86 unsigned long flags;
87
88 if (!conn->rmb_desc)
89 return;
90
91 spin_lock_irqsave(&conn->lgr->smcd->lock, flags);
92 conn->lgr->smcd->conn[conn->rmb_desc->sba_idx] = NULL;
93 spin_unlock_irqrestore(&conn->lgr->smcd->lock, flags);
94 }
95
96 /* Register a VLAN identifier with the ISM device. Use a reference count
97 * and add a VLAN identifier only when the first DMB using this VLAN is
98 * registered.
99 */
smc_ism_get_vlan(struct smcd_dev * smcd,unsigned short vlanid)100 int smc_ism_get_vlan(struct smcd_dev *smcd, unsigned short vlanid)
101 {
102 struct smc_ism_vlanid *new_vlan, *vlan;
103 unsigned long flags;
104 int rc = 0;
105
106 if (!vlanid) /* No valid vlan id */
107 return -EINVAL;
108 if (!smcd->ops->add_vlan_id)
109 return -EOPNOTSUPP;
110
111 /* create new vlan entry, in case we need it */
112 new_vlan = kzalloc(sizeof(*new_vlan), GFP_KERNEL);
113 if (!new_vlan)
114 return -ENOMEM;
115 new_vlan->vlanid = vlanid;
116 refcount_set(&new_vlan->refcnt, 1);
117
118 /* if there is an existing entry, increase count and return */
119 spin_lock_irqsave(&smcd->lock, flags);
120 list_for_each_entry(vlan, &smcd->vlan, list) {
121 if (vlan->vlanid == vlanid) {
122 refcount_inc(&vlan->refcnt);
123 kfree(new_vlan);
124 goto out;
125 }
126 }
127
128 /* no existing entry found.
129 * add new entry to device; might fail, e.g., if HW limit reached
130 */
131 if (smcd->ops->add_vlan_id(smcd, vlanid)) {
132 kfree(new_vlan);
133 rc = -EIO;
134 goto out;
135 }
136 list_add_tail(&new_vlan->list, &smcd->vlan);
137 out:
138 spin_unlock_irqrestore(&smcd->lock, flags);
139 return rc;
140 }
141
142 /* Unregister a VLAN identifier with the ISM device. Use a reference count
143 * and remove a VLAN identifier only when the last DMB using this VLAN is
144 * unregistered.
145 */
smc_ism_put_vlan(struct smcd_dev * smcd,unsigned short vlanid)146 int smc_ism_put_vlan(struct smcd_dev *smcd, unsigned short vlanid)
147 {
148 struct smc_ism_vlanid *vlan;
149 unsigned long flags;
150 bool found = false;
151 int rc = 0;
152
153 if (!vlanid) /* No valid vlan id */
154 return -EINVAL;
155 if (!smcd->ops->del_vlan_id)
156 return -EOPNOTSUPP;
157
158 spin_lock_irqsave(&smcd->lock, flags);
159 list_for_each_entry(vlan, &smcd->vlan, list) {
160 if (vlan->vlanid == vlanid) {
161 if (!refcount_dec_and_test(&vlan->refcnt))
162 goto out;
163 found = true;
164 break;
165 }
166 }
167 if (!found) {
168 rc = -ENOENT;
169 goto out; /* VLAN id not in table */
170 }
171
172 /* Found and the last reference just gone */
173 if (smcd->ops->del_vlan_id(smcd, vlanid))
174 rc = -EIO;
175 list_del(&vlan->list);
176 kfree(vlan);
177 out:
178 spin_unlock_irqrestore(&smcd->lock, flags);
179 return rc;
180 }
181
smc_ism_unregister_dmb(struct smcd_dev * smcd,struct smc_buf_desc * dmb_desc)182 int smc_ism_unregister_dmb(struct smcd_dev *smcd, struct smc_buf_desc *dmb_desc)
183 {
184 struct smcd_dmb dmb;
185 int rc = 0;
186
187 if (!dmb_desc->dma_addr)
188 return rc;
189
190 memset(&dmb, 0, sizeof(dmb));
191 dmb.dmb_tok = dmb_desc->token;
192 dmb.sba_idx = dmb_desc->sba_idx;
193 dmb.cpu_addr = dmb_desc->cpu_addr;
194 dmb.dma_addr = dmb_desc->dma_addr;
195 dmb.dmb_len = dmb_desc->len;
196 rc = smcd->ops->unregister_dmb(smcd, &dmb);
197 if (!rc || rc == ISM_ERROR) {
198 dmb_desc->cpu_addr = NULL;
199 dmb_desc->dma_addr = 0;
200 }
201
202 return rc;
203 }
204
smc_ism_register_dmb(struct smc_link_group * lgr,int dmb_len,struct smc_buf_desc * dmb_desc)205 int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
206 struct smc_buf_desc *dmb_desc)
207 {
208 #if IS_ENABLED(CONFIG_ISM)
209 struct smcd_dmb dmb;
210 int rc;
211
212 memset(&dmb, 0, sizeof(dmb));
213 dmb.dmb_len = dmb_len;
214 dmb.sba_idx = dmb_desc->sba_idx;
215 dmb.vlan_id = lgr->vlan_id;
216 dmb.rgid = lgr->peer_gid.gid;
217 rc = lgr->smcd->ops->register_dmb(lgr->smcd, &dmb, &smc_ism_client);
218 if (!rc) {
219 dmb_desc->sba_idx = dmb.sba_idx;
220 dmb_desc->token = dmb.dmb_tok;
221 dmb_desc->cpu_addr = dmb.cpu_addr;
222 dmb_desc->dma_addr = dmb.dma_addr;
223 dmb_desc->len = dmb.dmb_len;
224 }
225 return rc;
226 #else
227 return 0;
228 #endif
229 }
230
smc_ism_support_dmb_nocopy(struct smcd_dev * smcd)231 bool smc_ism_support_dmb_nocopy(struct smcd_dev *smcd)
232 {
233 /* for now only loopback-ism supports
234 * merging sndbuf with peer DMB to avoid
235 * data copies between them.
236 */
237 return (smcd->ops->support_dmb_nocopy &&
238 smcd->ops->support_dmb_nocopy(smcd));
239 }
240
smc_ism_attach_dmb(struct smcd_dev * dev,u64 token,struct smc_buf_desc * dmb_desc)241 int smc_ism_attach_dmb(struct smcd_dev *dev, u64 token,
242 struct smc_buf_desc *dmb_desc)
243 {
244 struct smcd_dmb dmb;
245 int rc = 0;
246
247 if (!dev->ops->attach_dmb)
248 return -EINVAL;
249
250 memset(&dmb, 0, sizeof(dmb));
251 dmb.dmb_tok = token;
252 rc = dev->ops->attach_dmb(dev, &dmb);
253 if (!rc) {
254 dmb_desc->sba_idx = dmb.sba_idx;
255 dmb_desc->token = dmb.dmb_tok;
256 dmb_desc->cpu_addr = dmb.cpu_addr;
257 dmb_desc->dma_addr = dmb.dma_addr;
258 dmb_desc->len = dmb.dmb_len;
259 }
260 return rc;
261 }
262
smc_ism_detach_dmb(struct smcd_dev * dev,u64 token)263 int smc_ism_detach_dmb(struct smcd_dev *dev, u64 token)
264 {
265 if (!dev->ops->detach_dmb)
266 return -EINVAL;
267
268 return dev->ops->detach_dmb(dev, token);
269 }
270
smc_nl_handle_smcd_dev(struct smcd_dev * smcd,struct sk_buff * skb,struct netlink_callback * cb)271 static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
272 struct sk_buff *skb,
273 struct netlink_callback *cb)
274 {
275 char smc_pnet[SMC_MAX_PNETID_LEN + 1];
276 struct smc_pci_dev smc_pci_dev;
277 struct nlattr *port_attrs;
278 struct nlattr *attrs;
279 struct ism_dev *ism;
280 int use_cnt = 0;
281 void *nlh;
282
283 ism = smcd->priv;
284 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
285 &smc_gen_nl_family, NLM_F_MULTI,
286 SMC_NETLINK_GET_DEV_SMCD);
287 if (!nlh)
288 goto errmsg;
289 attrs = nla_nest_start(skb, SMC_GEN_DEV_SMCD);
290 if (!attrs)
291 goto errout;
292 use_cnt = atomic_read(&smcd->lgr_cnt);
293 if (nla_put_u32(skb, SMC_NLA_DEV_USE_CNT, use_cnt))
294 goto errattr;
295 if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
296 goto errattr;
297 memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
298 smc_set_pci_values(to_pci_dev(ism->dev.parent), &smc_pci_dev);
299 if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
300 goto errattr;
301 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
302 goto errattr;
303 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_VENDOR, smc_pci_dev.pci_vendor))
304 goto errattr;
305 if (nla_put_u16(skb, SMC_NLA_DEV_PCI_DEVICE, smc_pci_dev.pci_device))
306 goto errattr;
307 if (nla_put_string(skb, SMC_NLA_DEV_PCI_ID, smc_pci_dev.pci_id))
308 goto errattr;
309
310 port_attrs = nla_nest_start(skb, SMC_NLA_DEV_PORT);
311 if (!port_attrs)
312 goto errattr;
313 if (nla_put_u8(skb, SMC_NLA_DEV_PORT_PNET_USR, smcd->pnetid_by_user))
314 goto errportattr;
315 memcpy(smc_pnet, smcd->pnetid, SMC_MAX_PNETID_LEN);
316 smc_pnet[SMC_MAX_PNETID_LEN] = 0;
317 if (nla_put_string(skb, SMC_NLA_DEV_PORT_PNETID, smc_pnet))
318 goto errportattr;
319
320 nla_nest_end(skb, port_attrs);
321 nla_nest_end(skb, attrs);
322 genlmsg_end(skb, nlh);
323 return 0;
324
325 errportattr:
326 nla_nest_cancel(skb, port_attrs);
327 errattr:
328 nla_nest_cancel(skb, attrs);
329 errout:
330 nlmsg_cancel(skb, nlh);
331 errmsg:
332 return -EMSGSIZE;
333 }
334
smc_nl_prep_smcd_dev(struct smcd_dev_list * dev_list,struct sk_buff * skb,struct netlink_callback * cb)335 static void smc_nl_prep_smcd_dev(struct smcd_dev_list *dev_list,
336 struct sk_buff *skb,
337 struct netlink_callback *cb)
338 {
339 struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
340 int snum = cb_ctx->pos[0];
341 struct smcd_dev *smcd;
342 int num = 0;
343
344 mutex_lock(&dev_list->mutex);
345 list_for_each_entry(smcd, &dev_list->list, list) {
346 if (num < snum)
347 goto next;
348 if (smc_nl_handle_smcd_dev(smcd, skb, cb))
349 goto errout;
350 next:
351 num++;
352 }
353 errout:
354 mutex_unlock(&dev_list->mutex);
355 cb_ctx->pos[0] = num;
356 }
357
smcd_nl_get_device(struct sk_buff * skb,struct netlink_callback * cb)358 int smcd_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb)
359 {
360 smc_nl_prep_smcd_dev(&smcd_dev_list, skb, cb);
361 return skb->len;
362 }
363
364 #if IS_ENABLED(CONFIG_ISM)
365 struct smc_ism_event_work {
366 struct work_struct work;
367 struct smcd_dev *smcd;
368 struct ism_event event;
369 };
370
371 #define ISM_EVENT_REQUEST 0x0001
372 #define ISM_EVENT_RESPONSE 0x0002
373 #define ISM_EVENT_REQUEST_IR 0x00000001
374 #define ISM_EVENT_CODE_SHUTDOWN 0x80
375 #define ISM_EVENT_CODE_TESTLINK 0x83
376
377 union smcd_sw_event_info {
378 u64 info;
379 struct {
380 u8 uid[SMC_LGR_ID_SIZE];
381 unsigned short vlan_id;
382 u16 code;
383 };
384 };
385
smcd_handle_sw_event(struct smc_ism_event_work * wrk)386 static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
387 {
388 struct smcd_gid peer_gid = { .gid = wrk->event.tok,
389 .gid_ext = 0 };
390 union smcd_sw_event_info ev_info;
391
392 ev_info.info = wrk->event.info;
393 switch (wrk->event.code) {
394 case ISM_EVENT_CODE_SHUTDOWN: /* Peer shut down DMBs */
395 smc_smcd_terminate(wrk->smcd, &peer_gid, ev_info.vlan_id);
396 break;
397 case ISM_EVENT_CODE_TESTLINK: /* Activity timer */
398 if (ev_info.code == ISM_EVENT_REQUEST &&
399 wrk->smcd->ops->signal_event) {
400 ev_info.code = ISM_EVENT_RESPONSE;
401 wrk->smcd->ops->signal_event(wrk->smcd,
402 &peer_gid,
403 ISM_EVENT_REQUEST_IR,
404 ISM_EVENT_CODE_TESTLINK,
405 ev_info.info);
406 }
407 break;
408 }
409 }
410
411 /* worker for SMC-D events */
smc_ism_event_work(struct work_struct * work)412 static void smc_ism_event_work(struct work_struct *work)
413 {
414 struct smc_ism_event_work *wrk =
415 container_of(work, struct smc_ism_event_work, work);
416 struct smcd_gid smcd_gid = { .gid = wrk->event.tok,
417 .gid_ext = 0 };
418
419 switch (wrk->event.type) {
420 case ISM_EVENT_GID: /* GID event, token is peer GID */
421 smc_smcd_terminate(wrk->smcd, &smcd_gid, VLAN_VID_MASK);
422 break;
423 case ISM_EVENT_DMB:
424 break;
425 case ISM_EVENT_SWR: /* Software defined event */
426 smcd_handle_sw_event(wrk);
427 break;
428 }
429 kfree(wrk);
430 }
431
smcd_alloc_dev(struct device * parent,const char * name,const struct smcd_ops * ops,int max_dmbs)432 static struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
433 const struct smcd_ops *ops, int max_dmbs)
434 {
435 struct smcd_dev *smcd;
436
437 smcd = devm_kzalloc(parent, sizeof(*smcd), GFP_KERNEL);
438 if (!smcd)
439 return NULL;
440 smcd->conn = devm_kcalloc(parent, max_dmbs,
441 sizeof(struct smc_connection *), GFP_KERNEL);
442 if (!smcd->conn)
443 return NULL;
444
445 smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
446 WQ_MEM_RECLAIM, name);
447 if (!smcd->event_wq)
448 return NULL;
449
450 smcd->ops = ops;
451
452 spin_lock_init(&smcd->lock);
453 spin_lock_init(&smcd->lgr_lock);
454 INIT_LIST_HEAD(&smcd->vlan);
455 INIT_LIST_HEAD(&smcd->lgr_list);
456 init_waitqueue_head(&smcd->lgrs_deleted);
457 return smcd;
458 }
459
smcd_register_dev(struct ism_dev * ism)460 static void smcd_register_dev(struct ism_dev *ism)
461 {
462 const struct smcd_ops *ops = ism_get_smcd_ops();
463 struct smcd_dev *smcd;
464
465 if (!ops)
466 return;
467
468 smcd = smcd_alloc_dev(&ism->pdev->dev, dev_name(&ism->pdev->dev), ops,
469 ISM_NR_DMBS);
470 if (!smcd)
471 return;
472 smcd->priv = ism;
473 ism_set_priv(ism, &smc_ism_client, smcd);
474 if (smc_pnetid_by_dev_port(&ism->pdev->dev, 0, smcd->pnetid))
475 smc_pnetid_by_table_smcd(smcd);
476
477 mutex_lock(&smcd_dev_list.mutex);
478 if (list_empty(&smcd_dev_list.list)) {
479 u8 *system_eid = NULL;
480
481 system_eid = smcd->ops->get_system_eid();
482 if (smcd->ops->supports_v2()) {
483 smc_ism_v2_capable = true;
484 memcpy(smc_ism_v2_system_eid, system_eid,
485 SMC_MAX_EID_LEN);
486 }
487 }
488 /* sort list: devices without pnetid before devices with pnetid */
489 if (smcd->pnetid[0])
490 list_add_tail(&smcd->list, &smcd_dev_list.list);
491 else
492 list_add(&smcd->list, &smcd_dev_list.list);
493 mutex_unlock(&smcd_dev_list.mutex);
494
495 pr_warn_ratelimited("smc: adding smcd device %s with pnetid %.16s%s\n",
496 dev_name(&ism->dev), smcd->pnetid,
497 smcd->pnetid_by_user ? " (user defined)" : "");
498
499 return;
500 }
501
smcd_unregister_dev(struct ism_dev * ism)502 static void smcd_unregister_dev(struct ism_dev *ism)
503 {
504 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
505
506 pr_warn_ratelimited("smc: removing smcd device %s\n",
507 dev_name(&ism->dev));
508 smcd->going_away = 1;
509 smc_smcd_terminate_all(smcd);
510 mutex_lock(&smcd_dev_list.mutex);
511 list_del_init(&smcd->list);
512 mutex_unlock(&smcd_dev_list.mutex);
513 destroy_workqueue(smcd->event_wq);
514 }
515
516 /* SMCD Device event handler. Called from ISM device interrupt handler.
517 * Parameters are ism device pointer,
518 * - event->type (0 --> DMB, 1 --> GID),
519 * - event->code (event code),
520 * - event->tok (either DMB token when event type 0, or GID when event type 1)
521 * - event->time (time of day)
522 * - event->info (debug info).
523 *
524 * Context:
525 * - Function called in IRQ context from ISM device driver event handler.
526 */
smcd_handle_event(struct ism_dev * ism,struct ism_event * event)527 static void smcd_handle_event(struct ism_dev *ism, struct ism_event *event)
528 {
529 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
530 struct smc_ism_event_work *wrk;
531
532 if (smcd->going_away)
533 return;
534 /* copy event to event work queue, and let it be handled there */
535 wrk = kmalloc(sizeof(*wrk), GFP_ATOMIC);
536 if (!wrk)
537 return;
538 INIT_WORK(&wrk->work, smc_ism_event_work);
539 wrk->smcd = smcd;
540 wrk->event = *event;
541 queue_work(smcd->event_wq, &wrk->work);
542 }
543
544 /* SMCD Device interrupt handler. Called from ISM device interrupt handler.
545 * Parameters are the ism device pointer, DMB number, and the DMBE bitmask.
546 * Find the connection and schedule the tasklet for this connection.
547 *
548 * Context:
549 * - Function called in IRQ context from ISM device driver IRQ handler.
550 */
smcd_handle_irq(struct ism_dev * ism,unsigned int dmbno,u16 dmbemask)551 static void smcd_handle_irq(struct ism_dev *ism, unsigned int dmbno,
552 u16 dmbemask)
553 {
554 struct smcd_dev *smcd = ism_get_priv(ism, &smc_ism_client);
555 struct smc_connection *conn = NULL;
556 unsigned long flags;
557
558 spin_lock_irqsave(&smcd->lock, flags);
559 conn = smcd->conn[dmbno];
560 if (conn && !conn->killed)
561 tasklet_schedule(&conn->rx_tsklet);
562 spin_unlock_irqrestore(&smcd->lock, flags);
563 }
564 #endif
565
smc_ism_signal_shutdown(struct smc_link_group * lgr)566 int smc_ism_signal_shutdown(struct smc_link_group *lgr)
567 {
568 int rc = 0;
569 #if IS_ENABLED(CONFIG_ISM)
570 union smcd_sw_event_info ev_info;
571
572 if (lgr->peer_shutdown)
573 return 0;
574 if (!lgr->smcd->ops->signal_event)
575 return 0;
576
577 memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
578 ev_info.vlan_id = lgr->vlan_id;
579 ev_info.code = ISM_EVENT_REQUEST;
580 rc = lgr->smcd->ops->signal_event(lgr->smcd, &lgr->peer_gid,
581 ISM_EVENT_REQUEST_IR,
582 ISM_EVENT_CODE_SHUTDOWN,
583 ev_info.info);
584 #endif
585 return rc;
586 }
587
smc_ism_init(void)588 int smc_ism_init(void)
589 {
590 int rc = 0;
591
592 #if IS_ENABLED(CONFIG_ISM)
593 smc_ism_v2_capable = false;
594 memset(smc_ism_v2_system_eid, 0, SMC_MAX_EID_LEN);
595
596 rc = ism_register_client(&smc_ism_client);
597 #endif
598 return rc;
599 }
600
smc_ism_exit(void)601 void smc_ism_exit(void)
602 {
603 #if IS_ENABLED(CONFIG_ISM)
604 ism_unregister_client(&smc_ism_client);
605 #endif
606 }
607