1 // SPDX-License-Identifier: GPL-2.0
3  *  Shared Memory Communications over RDMA (SMC-R) and RoCE
17 #include <linux/reboot.h>
20 #include <linux/smc.h>
26 #include "smc.h"
62 	if (lgr->is_smcd) {  in smc_lgr_list_head()
63 		*lgr_lock = &lgr->smcd->lgr_lock;  in smc_lgr_list_head()
64 		return &lgr->smcd->lgr_list;  in smc_lgr_list_head()
73 	atomic_inc(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]);  in smc_ibdev_cnt_inc()
78 	atomic_dec(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]);  in smc_ibdev_cnt_dec()
85 	 * otherwise there is a risk of out-of-sync link groups.  in smc_lgr_schedule_free_work()
87 	if (!lgr->freeing) {  in smc_lgr_schedule_free_work()
88 		mod_delayed_work(system_wq, &lgr->free_work,  in smc_lgr_schedule_free_work()
89 				 (!lgr->is_smcd && lgr->role == SMC_CLNT) ?  in smc_lgr_schedule_free_work()
98  * @smc		connection to register
104 	u32 token = conn->alert_token_local;  in smc_lgr_add_alert_token()
106 	link = &conn->lgr->conns_all.rb_node;  in smc_lgr_add_alert_token()
112 		if (cur->alert_token_local > token)  in smc_lgr_add_alert_token()
113 			link = &parent->rb_left;  in smc_lgr_add_alert_token()
115 			link = &parent->rb_right;  in smc_lgr_add_alert_token()
118 	rb_link_node(&conn->alert_node, parent, link);  in smc_lgr_add_alert_token()
119 	rb_insert_color(&conn->alert_node, &conn->lgr->conns_all);  in smc_lgr_add_alert_token()
122 /* assign an SMC-R link to the connection */
130 	conn->lnk = NULL;	/* reset conn->lnk first */  in smcr_lgr_conn_assign_link()
132 		struct smc_link *lnk = &conn->lgr->lnk[i];  in smcr_lgr_conn_assign_link()
134 		if (lnk->state != expected || lnk->link_is_asym)  in smcr_lgr_conn_assign_link()
136 		if (conn->lgr->role == SMC_CLNT) {  in smcr_lgr_conn_assign_link()
137 			conn->lnk = lnk; /* temporary, SMC server assigns link*/  in smcr_lgr_conn_assign_link()
140 		if (conn->lgr->conns_num % 2) {  in smcr_lgr_conn_assign_link()
144 				lnk2 = &conn->lgr->lnk[j];  in smcr_lgr_conn_assign_link()
145 				if (lnk2->state == expected &&  in smcr_lgr_conn_assign_link()
146 				    !lnk2->link_is_asym) {  in smcr_lgr_conn_assign_link()
147 					conn->lnk = lnk2;  in smcr_lgr_conn_assign_link()
152 		if (!conn->lnk)  in smcr_lgr_conn_assign_link()
153 			conn->lnk = lnk;  in smcr_lgr_conn_assign_link()
156 	if (!conn->lnk)  in smcr_lgr_conn_assign_link()
158 	atomic_inc(&conn->lnk->conn_cnt);  in smcr_lgr_conn_assign_link()
169 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_lgr_register_conn()  local
173 	if (!conn->lgr->is_smcd) {  in smc_lgr_register_conn()
176 			conn->lgr = NULL;  in smc_lgr_register_conn()
183 	sock_hold(&smc->sk); /* sock_put in smc_lgr_unregister_conn() */  in smc_lgr_register_conn()
184 	while (!conn->alert_token_local) {  in smc_lgr_register_conn()
185 		conn->alert_token_local = atomic_inc_return(&nexttoken);  in smc_lgr_register_conn()
186 		if (smc_lgr_find_conn(conn->alert_token_local, conn->lgr))  in smc_lgr_register_conn()
187 			conn->alert_token_local = 0;  in smc_lgr_register_conn()
190 	conn->lgr->conns_num++;  in smc_lgr_register_conn()
198 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in __smc_lgr_unregister_conn()  local
199 	struct smc_link_group *lgr = conn->lgr;  in __smc_lgr_unregister_conn()
201 	rb_erase(&conn->alert_node, &lgr->conns_all);  in __smc_lgr_unregister_conn()
202 	if (conn->lnk)  in __smc_lgr_unregister_conn()
203 		atomic_dec(&conn->lnk->conn_cnt);  in __smc_lgr_unregister_conn()
204 	lgr->conns_num--;  in __smc_lgr_unregister_conn()
205 	conn->alert_token_local = 0;  in __smc_lgr_unregister_conn()
206 	sock_put(&smc->sk); /* sock_hold in smc_lgr_register_conn() */  in __smc_lgr_unregister_conn()
213 	struct smc_link_group *lgr = conn->lgr;  in smc_lgr_unregister_conn()
217 	write_lock_bh(&lgr->conns_lock);  in smc_lgr_unregister_conn()
218 	if (conn->alert_token_local) {  in smc_lgr_unregister_conn()
221 	write_unlock_bh(&lgr->conns_lock);  in smc_lgr_unregister_conn()
229 	list_add(&buf_desc->list, buf_list);  in smc_lgr_buf_list_add()
231 		lgr->alloc_rmbs += buf_desc->len;  in smc_lgr_buf_list_add()
232 		lgr->alloc_rmbs +=  in smc_lgr_buf_list_add()
233 			lgr->is_smcd ? sizeof(struct smcd_cdc_msg) : 0;  in smc_lgr_buf_list_add()
235 		lgr->alloc_sndbufs += buf_desc->len;  in smc_lgr_buf_list_add()
243 	list_del(&buf_desc->list);  in smc_lgr_buf_list_del()
245 		lgr->alloc_rmbs -= buf_desc->len;  in smc_lgr_buf_list_del()
246 		lgr->alloc_rmbs -=  in smc_lgr_buf_list_del()
247 			lgr->is_smcd ? sizeof(struct smcd_cdc_msg) : 0;  in smc_lgr_buf_list_del()
249 		lgr->alloc_sndbufs -= buf_desc->len;  in smc_lgr_buf_list_del()
263 	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,  in smc_nl_get_sys_info()
268 	if (cb_ctx->pos[0])  in smc_nl_get_sys_info()
297 	cb_ctx->pos[0] = 1;  in smc_nl_get_sys_info()
298 	return skb->len;  in smc_nl_get_sys_info()
305 	return skb->len;  in smc_nl_get_sys_info()
317 	if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version))  in smc_nl_fill_lgr_v2_common()
319 	if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release))  in smc_nl_fill_lgr_v2_common()
321 	if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os))  in smc_nl_fill_lgr_v2_common()
323 	memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN);  in smc_nl_fill_lgr_v2_common()
327 	memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN);  in smc_nl_fill_lgr_v2_common()
337 	return -EMSGSIZE;  in smc_nl_fill_lgr_v2_common()
349 	if (nla_put_u8(skb, SMC_NLA_LGR_R_V2_DIRECT, !lgr->uses_gateway))  in smc_nl_fill_smcr_lgr_v2()
351 	if (nla_put_u8(skb, SMC_NLA_LGR_R_V2_MAX_CONNS, lgr->max_conns))  in smc_nl_fill_smcr_lgr_v2()
353 	if (nla_put_u8(skb, SMC_NLA_LGR_R_V2_MAX_LINKS, lgr->max_links))  in smc_nl_fill_smcr_lgr_v2()
362 	return -EMSGSIZE;  in smc_nl_fill_smcr_lgr_v2()
376 	if (nla_put_u32(skb, SMC_NLA_LGR_R_ID, *((u32 *)&lgr->id)))  in smc_nl_fill_lgr()
378 	if (nla_put_u32(skb, SMC_NLA_LGR_R_CONNS_NUM, lgr->conns_num))  in smc_nl_fill_lgr()
380 	if (nla_put_u8(skb, SMC_NLA_LGR_R_ROLE, lgr->role))  in smc_nl_fill_lgr()
382 	if (nla_put_u8(skb, SMC_NLA_LGR_R_TYPE, lgr->type))  in smc_nl_fill_lgr()
384 	if (nla_put_u8(skb, SMC_NLA_LGR_R_BUF_TYPE, lgr->buf_type))  in smc_nl_fill_lgr()
386 	if (nla_put_u8(skb, SMC_NLA_LGR_R_VLAN_ID, lgr->vlan_id))  in smc_nl_fill_lgr()
389 			      lgr->net->net_cookie, SMC_NLA_LGR_R_PAD))  in smc_nl_fill_lgr()
391 	memcpy(smc_target, lgr->pnet_id, SMC_MAX_PNETID_LEN);  in smc_nl_fill_lgr()
395 	if (nla_put_uint(skb, SMC_NLA_LGR_R_SNDBUF_ALLOC, lgr->alloc_sndbufs))  in smc_nl_fill_lgr()
397 	if (nla_put_uint(skb, SMC_NLA_LGR_R_RMB_ALLOC, lgr->alloc_rmbs))  in smc_nl_fill_lgr()
399 	if (lgr->smc_version > SMC_V1) {  in smc_nl_fill_lgr()
414 	return -EMSGSIZE;  in smc_nl_fill_lgr()
428 	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,  in smc_nl_fill_lgr_link()
438 	if (nla_put_u8(skb, SMC_NLA_LINK_ID, link->link_id))  in smc_nl_fill_lgr_link()
440 	if (nla_put_u32(skb, SMC_NLA_LINK_STATE, link->state))  in smc_nl_fill_lgr_link()
443 			atomic_read(&link->conn_cnt)))  in smc_nl_fill_lgr_link()
445 	if (nla_put_u8(skb, SMC_NLA_LINK_IB_PORT, link->ibport))  in smc_nl_fill_lgr_link()
447 	if (nla_put_u32(skb, SMC_NLA_LINK_NET_DEV, link->ndev_ifidx))  in smc_nl_fill_lgr_link()
449 	snprintf(smc_ibname, sizeof(smc_ibname), "%s", link->ibname);  in smc_nl_fill_lgr_link()
452 	memcpy(&link_uid, link->link_uid, sizeof(link_uid));  in smc_nl_fill_lgr_link()
455 	memcpy(&link_uid, link->peer_link_uid, sizeof(link_uid));  in smc_nl_fill_lgr_link()
459 	smc_gid_be16_convert(smc_gid_target, link->gid);  in smc_nl_fill_lgr_link()
463 	smc_gid_be16_convert(smc_gid_target, link->peer_gid);  in smc_nl_fill_lgr_link()
475 	return -EMSGSIZE;  in smc_nl_fill_lgr_link()
486 	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,  in smc_nl_handle_lgr()
498 		if (!smc_link_usable(&lgr->lnk[i]))  in smc_nl_handle_lgr()
500 		if (smc_nl_fill_lgr_link(lgr, &lgr->lnk[i], skb, cb))  in smc_nl_handle_lgr()
509 	return -EMSGSIZE;  in smc_nl_handle_lgr()
519 	int snum = cb_ctx->pos[0];  in smc_nl_fill_lgr_list()
522 	spin_lock_bh(&smc_lgr->lock);  in smc_nl_fill_lgr_list()
523 	list_for_each_entry(lgr, &smc_lgr->list, list) {  in smc_nl_fill_lgr_list()
532 	spin_unlock_bh(&smc_lgr->lock);  in smc_nl_fill_lgr_list()
533 	cb_ctx->pos[0] = num;  in smc_nl_fill_lgr_list()
541 	struct smcd_dev *smcd = lgr->smcd;  in smc_nl_fill_smcd_lgr()
546 	nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,  in smc_nl_fill_smcd_lgr()
556 	if (nla_put_u32(skb, SMC_NLA_LGR_D_ID, *((u32 *)&lgr->id)))  in smc_nl_fill_smcd_lgr()
558 	smcd->ops->get_local_gid(smcd, &smcd_gid);  in smc_nl_fill_smcd_lgr()
565 	if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_PEER_GID, lgr->peer_gid.gid,  in smc_nl_fill_smcd_lgr()
569 			      lgr->peer_gid.gid_ext, SMC_NLA_LGR_D_PAD))  in smc_nl_fill_smcd_lgr()
571 	if (nla_put_u8(skb, SMC_NLA_LGR_D_VLAN_ID, lgr->vlan_id))  in smc_nl_fill_smcd_lgr()
573 	if (nla_put_u32(skb, SMC_NLA_LGR_D_CONNS_NUM, lgr->conns_num))  in smc_nl_fill_smcd_lgr()
575 	if (nla_put_u32(skb, SMC_NLA_LGR_D_CHID, smc_ism_get_chid(lgr->smcd)))  in smc_nl_fill_smcd_lgr()
577 	if (nla_put_uint(skb, SMC_NLA_LGR_D_SNDBUF_ALLOC, lgr->alloc_sndbufs))  in smc_nl_fill_smcd_lgr()
579 	if (nla_put_uint(skb, SMC_NLA_LGR_D_DMB_ALLOC, lgr->alloc_rmbs))  in smc_nl_fill_smcd_lgr()
581 	memcpy(smc_pnet, lgr->smcd->pnetid, SMC_MAX_PNETID_LEN);  in smc_nl_fill_smcd_lgr()
585 	if (lgr->smc_version > SMC_V1) {  in smc_nl_fill_smcd_lgr()
603 	return -EMSGSIZE;  in smc_nl_fill_smcd_lgr()
612 	int snum = cb_ctx->pos[1];  in smc_nl_handle_smcd_lgr()
615 	spin_lock_bh(&dev->lgr_lock);  in smc_nl_handle_smcd_lgr()
616 	list_for_each_entry(lgr, &dev->lgr_list, list) {  in smc_nl_handle_smcd_lgr()
617 		if (!lgr->is_smcd)  in smc_nl_handle_smcd_lgr()
628 	spin_unlock_bh(&dev->lgr_lock);  in smc_nl_handle_smcd_lgr()
629 	cb_ctx->pos[1] = num;  in smc_nl_handle_smcd_lgr()
639 	int snum = cb_ctx->pos[0];  in smc_nl_fill_smcd_dev()
642 	mutex_lock(&dev_list->mutex);  in smc_nl_fill_smcd_dev()
643 	list_for_each_entry(smcd_dev, &dev_list->list, list) {  in smc_nl_fill_smcd_dev()
644 		if (list_empty(&smcd_dev->lgr_list))  in smc_nl_fill_smcd_dev()
655 	mutex_unlock(&dev_list->mutex);  in smc_nl_fill_smcd_dev()
656 	cb_ctx->pos[0] = num;  in smc_nl_fill_smcd_dev()
665 	return skb->len;  in smcr_nl_get_lgr()
673 	return skb->len;  in smcr_nl_get_link()
679 	return skb->len;  in smcd_nl_get_lgr()
692 	if (!list_empty(&lgr->list))  in smc_lgr_cleanup_early()
693 		list_del_init(&lgr->list);  in smc_lgr_cleanup_early()
703 		struct smc_link *lnk = &lgr->lnk[i];  in smcr_lgr_link_deactivate_all()
706 			lnk->state = SMC_LNK_INACTIVE;  in smcr_lgr_link_deactivate_all()
708 	wake_up_all(&lgr->llc_msg_waiter);  in smcr_lgr_link_deactivate_all()
709 	wake_up_all(&lgr->llc_flow_waiter);  in smcr_lgr_link_deactivate_all()
724 	if (lgr->freeing) {  in smc_lgr_free_work()
728 	read_lock_bh(&lgr->conns_lock);  in smc_lgr_free_work()
729 	conns = RB_EMPTY_ROOT(&lgr->conns_all);  in smc_lgr_free_work()
730 	read_unlock_bh(&lgr->conns_lock);  in smc_lgr_free_work()
735 	list_del_init(&lgr->list); /* remove from smc_lgr_list */  in smc_lgr_free_work()
736 	lgr->freeing = 1; /* this instance does the freeing, no new schedule */  in smc_lgr_free_work()
738 	cancel_delayed_work(&lgr->free_work);  in smc_lgr_free_work()
740 	if (!lgr->is_smcd && !lgr->terminating)  in smc_lgr_free_work()
743 	if (lgr->is_smcd && !lgr->terminating)  in smc_lgr_free_work()
745 	if (!lgr->is_smcd)  in smc_lgr_free_work()
766 		link_id = ++lgr->next_link_id;  in smcr_next_link_id()
768 			link_id = ++lgr->next_link_id;  in smcr_next_link_id()
770 			if (smc_link_usable(&lgr->lnk[i]) &&  in smcr_next_link_id()
771 			    lgr->lnk[i].link_id == link_id)  in smcr_next_link_id()
781 	struct smc_ib_device *smcibdev = link->smcibdev;  in smcr_copy_dev_info_to_link()
783 	snprintf(link->ibname, sizeof(link->ibname), "%s",  in smcr_copy_dev_info_to_link()
784 		 smcibdev->ibdev->name);  in smcr_copy_dev_info_to_link()
785 	link->ndev_ifidx = smcibdev->ndev_ifidx[link->ibport - 1];  in smcr_copy_dev_info_to_link()
795 	if (lgr->smc_version == SMC_V2) {  in smcr_link_init()
796 		lnk->smcibdev = ini->smcrv2.ib_dev_v2;  in smcr_link_init()
797 		lnk->ibport = ini->smcrv2.ib_port_v2;  in smcr_link_init()
798 		lnk->wr_rx_sge_cnt = lnk->smcibdev->ibdev->attrs.max_recv_sge < 2 ? 1 : 2;  in smcr_link_init()
799 		lnk->wr_rx_buflen = smc_link_shared_v2_rxbuf(lnk) ?  in smcr_link_init()
802 		lnk->smcibdev = ini->ib_dev;  in smcr_link_init()
803 		lnk->ibport = ini->ib_port;  in smcr_link_init()
804 		lnk->wr_rx_sge_cnt = 1;  in smcr_link_init()
805 		lnk->wr_rx_buflen = SMC_WR_BUF_SIZE;  in smcr_link_init()
807 	get_device(&lnk->smcibdev->ibdev->dev);  in smcr_link_init()
808 	atomic_inc(&lnk->smcibdev->lnk_cnt);  in smcr_link_init()
809 	refcount_set(&lnk->refcnt, 1); /* link refcnt is set to 1 */  in smcr_link_init()
810 	lnk->clearing = 0;  in smcr_link_init()
811 	lnk->path_mtu = lnk->smcibdev->pattr[lnk->ibport - 1].active_mtu;  in smcr_link_init()
812 	lnk->link_id = smcr_next_link_id(lgr);  in smcr_link_init()
813 	lnk->lgr = lgr;  in smcr_link_init()
815 	lnk->link_idx = link_idx;  in smcr_link_init()
816 	lnk->wr_rx_id_compl = 0;  in smcr_link_init()
819 	atomic_set(&lnk->conn_cnt, 0);  in smcr_link_init()
821 	INIT_WORK(&lnk->link_down_wrk, smc_link_down_work);  in smcr_link_init()
822 	if (!lnk->smcibdev->initialized) {  in smcr_link_init()
823 		rc = (int)smc_ib_setup_per_ibdev(lnk->smcibdev);  in smcr_link_init()
828 	lnk->psn_initial = rndvec[0] + (rndvec[1] << 8) +  in smcr_link_init()
830 	rc = smc_ib_determine_gid(lnk->smcibdev, lnk->ibport,  in smcr_link_init()
831 				  ini->vlan_id, lnk->gid, &lnk->sgid_index,  in smcr_link_init()
832 				  lgr->smc_version == SMC_V2 ?  in smcr_link_init()
833 						  &ini->smcrv2 : NULL);  in smcr_link_init()
851 	lnk->state = SMC_LNK_ACTIVATING;  in smcr_link_init()
864 	put_device(&lnk->smcibdev->ibdev->dev);  in smcr_link_init()
865 	smcibdev = lnk->smcibdev;  in smcr_link_init()
867 	lnk->state = SMC_LNK_UNUSED;  in smcr_link_init()
868 	if (!atomic_dec_return(&smcibdev->lnk_cnt))  in smcr_link_init()
869 		wake_up(&smcibdev->lnks_deleted);  in smcr_link_init()
874 /* create a new SMC link group */
875 static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini)  in smc_lgr_create()  argument
886 	if (ini->is_smcd && ini->vlan_id) {  in smc_lgr_create()
887 		if (smc_ism_get_vlan(ini->ism_dev[ini->ism_selected],  in smc_lgr_create()
888 				     ini->vlan_id)) {  in smc_lgr_create()
899 	lgr->tx_wq = alloc_workqueue("smc_tx_wq-%*phN", 0, 0,  in smc_lgr_create()
900 				     SMC_LGR_ID_SIZE, &lgr->id);  in smc_lgr_create()
901 	if (!lgr->tx_wq) {  in smc_lgr_create()
902 		rc = -ENOMEM;  in smc_lgr_create()
905 	lgr->is_smcd = ini->is_smcd;  in smc_lgr_create()
906 	lgr->sync_err = 0;  in smc_lgr_create()
907 	lgr->terminating = 0;  in smc_lgr_create()
908 	lgr->freeing = 0;  in smc_lgr_create()
909 	lgr->vlan_id = ini->vlan_id;  in smc_lgr_create()
910 	refcount_set(&lgr->refcnt, 1); /* set lgr refcnt to 1 */  in smc_lgr_create()
911 	init_rwsem(&lgr->sndbufs_lock);  in smc_lgr_create()
912 	init_rwsem(&lgr->rmbs_lock);  in smc_lgr_create()
913 	rwlock_init(&lgr->conns_lock);  in smc_lgr_create()
915 		INIT_LIST_HEAD(&lgr->sndbufs[i]);  in smc_lgr_create()
916 		INIT_LIST_HEAD(&lgr->rmbs[i]);  in smc_lgr_create()
918 	lgr->next_link_id = 0;  in smc_lgr_create()
920 	memcpy(&lgr->id, (u8 *)&smc_lgr_list.num, SMC_LGR_ID_SIZE);  in smc_lgr_create()
921 	INIT_DELAYED_WORK(&lgr->free_work, smc_lgr_free_work);  in smc_lgr_create()
922 	INIT_WORK(&lgr->terminate_work, smc_lgr_terminate_work);  in smc_lgr_create()
923 	lgr->conns_all = RB_ROOT;  in smc_lgr_create()
924 	if (ini->is_smcd) {  in smc_lgr_create()
925 		/* SMC-D specific settings */  in smc_lgr_create()
926 		smcd = ini->ism_dev[ini->ism_selected];  in smc_lgr_create()
927 		get_device(smcd->ops->get_dev(smcd));  in smc_lgr_create()
928 		lgr->peer_gid.gid =  in smc_lgr_create()
929 			ini->ism_peer_gid[ini->ism_selected].gid;  in smc_lgr_create()
930 		lgr->peer_gid.gid_ext =  in smc_lgr_create()
931 			ini->ism_peer_gid[ini->ism_selected].gid_ext;  in smc_lgr_create()
932 		lgr->smcd = ini->ism_dev[ini->ism_selected];  in smc_lgr_create()
933 		lgr_list = &ini->ism_dev[ini->ism_selected]->lgr_list;  in smc_lgr_create()
934 		lgr_lock = &lgr->smcd->lgr_lock;  in smc_lgr_create()
935 		lgr->smc_version = ini->smcd_version;  in smc_lgr_create()
936 		lgr->peer_shutdown = 0;  in smc_lgr_create()
937 		atomic_inc(&ini->ism_dev[ini->ism_selected]->lgr_cnt);  in smc_lgr_create()
939 		/* SMC-R specific settings */  in smc_lgr_create()
943 		lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT;  in smc_lgr_create()
944 		lgr->smc_version = ini->smcr_version;  in smc_lgr_create()
945 		memcpy(lgr->peer_systemid, ini->peer_systemid,  in smc_lgr_create()
947 		if (lgr->smc_version == SMC_V2) {  in smc_lgr_create()
948 			ibdev = ini->smcrv2.ib_dev_v2;  in smc_lgr_create()
949 			ibport = ini->smcrv2.ib_port_v2;  in smc_lgr_create()
950 			lgr->saddr = ini->smcrv2.saddr;  in smc_lgr_create()
951 			lgr->uses_gateway = ini->smcrv2.uses_gateway;  in smc_lgr_create()
952 			memcpy(lgr->nexthop_mac, ini->smcrv2.nexthop_mac,  in smc_lgr_create()
954 			lgr->max_conns = ini->max_conns;  in smc_lgr_create()
955 			lgr->max_links = ini->max_links;  in smc_lgr_create()
957 			ibdev = ini->ib_dev;  in smc_lgr_create()
958 			ibport = ini->ib_port;  in smc_lgr_create()
959 			lgr->max_conns = SMC_CONN_PER_LGR_MAX;  in smc_lgr_create()
960 			lgr->max_links = SMC_LINKS_ADD_LNK_MAX;  in smc_lgr_create()
962 		memcpy(lgr->pnet_id, ibdev->pnetid[ibport - 1],  in smc_lgr_create()
967 		smc_llc_lgr_init(lgr, smc);  in smc_lgr_create()
970 		lnk = &lgr->lnk[link_idx];  in smc_lgr_create()
976 		lgr->net = smc_ib_net(lnk->smcibdev);  in smc_lgr_create()
979 		lgr->buf_type = lgr->net->smc.sysctl_smcr_buf_type;  in smc_lgr_create()
982 	smc->conn.lgr = lgr;  in smc_lgr_create()
984 	list_add_tail(&lgr->list, lgr_list);  in smc_lgr_create()
989 	destroy_workqueue(lgr->tx_wq);  in smc_lgr_create()
993 	if (ini->is_smcd && ini->vlan_id)  in smc_lgr_create()
994 		smc_ism_put_vlan(ini->ism_dev[ini->ism_selected], ini->vlan_id);  in smc_lgr_create()
997 		if (rc == -ENOMEM)  in smc_lgr_create()
1007 	int buffer_len = conn->peer_rmbe_size;  in smc_write_space()
1012 	smc_curs_copy(&prod, &conn->local_tx_ctrl.prod, conn);  in smc_write_space()
1013 	smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn);  in smc_write_space()
1015 	space = buffer_len - smc_curs_diff(buffer_len, &cons, &prod);  in smc_write_space()
1019 static int smc_switch_cursor(struct smc_sock *smc, struct smc_cdc_tx_pend *pend,  in smc_switch_cursor()  argument
1022 	struct smc_connection *conn = &smc->conn;  in smc_switch_cursor()
1027 	smc_curs_copy(&conn->tx_curs_sent, &conn->tx_curs_fin, conn);  in smc_switch_cursor()
1028 	smc_curs_copy(&fin, &conn->local_tx_ctrl_fin, conn);  in smc_switch_cursor()
1030 	smc_curs_copy(&conn->local_tx_ctrl.prod, &fin, conn);  in smc_switch_cursor()
1031 	smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn);  in smc_switch_cursor()
1033 	if (smc_curs_comp(conn->peer_rmbe_size, &cons, &fin) < 0) {  in smc_switch_cursor()
1037 		diff = smc_curs_diff(conn->peer_rmbe_size, &fin, &cons);  in smc_switch_cursor()
1038 		smc_curs_add(conn->sndbuf_desc->len,  in smc_switch_cursor()
1039 			     &conn->tx_curs_sent, diff);  in smc_switch_cursor()
1040 		smc_curs_add(conn->sndbuf_desc->len,  in smc_switch_cursor()
1041 			     &conn->tx_curs_fin, diff);  in smc_switch_cursor()
1044 		atomic_add(diff, &conn->sndbuf_space);  in smc_switch_cursor()
1047 		smc_curs_add(conn->peer_rmbe_size,  in smc_switch_cursor()
1048 			     &conn->local_tx_ctrl.prod, diff);  in smc_switch_cursor()
1049 		smc_curs_add(conn->peer_rmbe_size,  in smc_switch_cursor()
1050 			     &conn->local_tx_ctrl_fin, diff);  in smc_switch_cursor()
1053 	atomic_set(&smc->conn.peer_rmbe_space, smc_write_space(conn));  in smc_switch_cursor()
1055 	if (smc->sk.sk_state != SMC_INIT &&  in smc_switch_cursor()
1056 	    smc->sk.sk_state != SMC_CLOSED) {  in smc_switch_cursor()
1059 			queue_delayed_work(conn->lgr->tx_wq, &conn->tx_work, 0);  in smc_switch_cursor()
1060 			smc->sk.sk_data_ready(&smc->sk);  in smc_switch_cursor()
1063 		smc_wr_tx_put_slot(conn->lnk,  in smc_switch_cursor()
1072 	atomic_dec(&conn->lnk->conn_cnt);  in smc_switch_link_and_count()
1074 	smcr_link_put(conn->lnk);  in smc_switch_link_and_count()
1075 	conn->lnk = to_lnk;  in smc_switch_link_and_count()
1076 	atomic_inc(&conn->lnk->conn_cnt);  in smc_switch_link_and_count()
1078 	smcr_link_hold(conn->lnk);  in smc_switch_link_and_count()
1088 	struct smc_sock *smc;  in smc_switch_conns()  local
1096 		if (!smc_link_active(&lgr->lnk[i]) || i == from_lnk->link_idx)  in smc_switch_conns()
1098 		if (is_dev_err && from_lnk->smcibdev == lgr->lnk[i].smcibdev &&  in smc_switch_conns()
1099 		    from_lnk->ibport == lgr->lnk[i].ibport) {  in smc_switch_conns()
1102 		to_lnk = &lgr->lnk[i];  in smc_switch_conns()
1110 	read_lock_bh(&lgr->conns_lock);  in smc_switch_conns()
1111 	for (node = rb_first(&lgr->conns_all); node; node = rb_next(node)) {  in smc_switch_conns()
1113 		if (conn->lnk != from_lnk)  in smc_switch_conns()
1115 		smc = container_of(conn, struct smc_sock, conn);  in smc_switch_conns()
1116 		/* conn->lnk not yet set in SMC_INIT state */  in smc_switch_conns()
1117 		if (smc->sk.sk_state == SMC_INIT)  in smc_switch_conns()
1119 		if (smc->sk.sk_state == SMC_CLOSED ||  in smc_switch_conns()
1120 		    smc->sk.sk_state == SMC_PEERCLOSEWAIT1 ||  in smc_switch_conns()
1121 		    smc->sk.sk_state == SMC_PEERCLOSEWAIT2 ||  in smc_switch_conns()
1122 		    smc->sk.sk_state == SMC_APPFINCLOSEWAIT ||  in smc_switch_conns()
1123 		    smc->sk.sk_state == SMC_APPCLOSEWAIT1 ||  in smc_switch_conns()
1124 		    smc->sk.sk_state == SMC_APPCLOSEWAIT2 ||  in smc_switch_conns()
1125 		    smc->sk.sk_state == SMC_PEERFINCLOSEWAIT ||  in smc_switch_conns()
1126 		    smc->sk.sk_state == SMC_PEERABORTWAIT ||  in smc_switch_conns()
1127 		    smc->sk.sk_state == SMC_PROCESSABORT) {  in smc_switch_conns()
1128 			spin_lock_bh(&conn->send_lock);  in smc_switch_conns()
1130 			spin_unlock_bh(&conn->send_lock);  in smc_switch_conns()
1133 		sock_hold(&smc->sk);  in smc_switch_conns()
1134 		read_unlock_bh(&lgr->conns_lock);  in smc_switch_conns()
1135 		/* pre-fetch buffer outside of send_lock, might sleep */  in smc_switch_conns()
1140 		spin_lock_bh(&conn->send_lock);  in smc_switch_conns()
1142 		rc = smc_switch_cursor(smc, pend, wr_buf);  in smc_switch_conns()
1143 		spin_unlock_bh(&conn->send_lock);  in smc_switch_conns()
1144 		sock_put(&smc->sk);  in smc_switch_conns()
1149 	read_unlock_bh(&lgr->conns_lock);  in smc_switch_conns()
1165 	if (is_rmb && buf_desc->is_conf_rkey && !list_empty(&lgr->list)) {  in smcr_buf_unuse()
1170 			down_read(&lgr->llc_conf_mutex);  in smcr_buf_unuse()
1172 			buf_desc->is_conf_rkey = false;  in smcr_buf_unuse()
1173 			up_read(&lgr->llc_conf_mutex);  in smcr_buf_unuse()
1174 			smc_llc_flow_stop(lgr, &lgr->llc_flow_lcl);  in smcr_buf_unuse()
1178 	if (buf_desc->is_reg_err) {  in smcr_buf_unuse()
1180 		lock = is_rmb ? &lgr->rmbs_lock :  in smcr_buf_unuse()
1181 				&lgr->sndbufs_lock;  in smcr_buf_unuse()
1189 		memzero_explicit(buf_desc->cpu_addr, buf_desc->len);  in smcr_buf_unuse()
1190 		WRITE_ONCE(buf_desc->used, 0);  in smcr_buf_unuse()
1196 	struct smcd_dev *smcd = conn->lgr->smcd;  in smcd_buf_detach()
1197 	u64 peer_token = conn->peer_token;  in smcd_buf_detach()
1199 	if (!conn->sndbuf_desc)  in smcd_buf_detach()
1204 	kfree(conn->sndbuf_desc);  in smcd_buf_detach()
1205 	conn->sndbuf_desc = NULL;  in smcd_buf_detach()
1211 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_buf_unuse()  local
1212 	bool is_smcd = lgr->is_smcd;  in smc_buf_unuse()
1215 	if (conn->sndbuf_desc) {  in smc_buf_unuse()
1216 		bufsize = conn->sndbuf_desc->len;  in smc_buf_unuse()
1217 		if (!is_smcd && conn->sndbuf_desc->is_vm) {  in smc_buf_unuse()
1218 			smcr_buf_unuse(conn->sndbuf_desc, false, lgr);  in smc_buf_unuse()
1220 			memzero_explicit(conn->sndbuf_desc->cpu_addr, bufsize);  in smc_buf_unuse()
1221 			WRITE_ONCE(conn->sndbuf_desc->used, 0);  in smc_buf_unuse()
1223 		SMC_STAT_RMB_SIZE(smc, is_smcd, false, false, bufsize);  in smc_buf_unuse()
1225 	if (conn->rmb_desc) {  in smc_buf_unuse()
1226 		bufsize = conn->rmb_desc->len;  in smc_buf_unuse()
1228 			smcr_buf_unuse(conn->rmb_desc, true, lgr);  in smc_buf_unuse()
1231 			memzero_explicit(conn->rmb_desc->cpu_addr, bufsize);  in smc_buf_unuse()
1232 			WRITE_ONCE(conn->rmb_desc->used, 0);  in smc_buf_unuse()
1234 		SMC_STAT_RMB_SIZE(smc, is_smcd, true, false, bufsize);  in smc_buf_unuse()
1241 	struct smc_link_group *lgr = conn->lgr;  in smc_conn_free()
1243 	if (!lgr || conn->freed)  in smc_conn_free()
1249 	conn->freed = 1;  in smc_conn_free()
1256 	if (lgr->is_smcd) {  in smc_conn_free()
1257 		if (!list_empty(&lgr->list))  in smc_conn_free()
1259 		if (smc_ism_support_dmb_nocopy(lgr->smcd))  in smc_conn_free()
1261 		tasklet_kill(&conn->rx_tsklet);  in smc_conn_free()
1264 		if (current_work() != &conn->abort_work)  in smc_conn_free()
1265 			cancel_work_sync(&conn->abort_work);  in smc_conn_free()
1267 	if (!list_empty(&lgr->list)) {  in smc_conn_free()
1272 	if (!lgr->conns_num)  in smc_conn_free()
1275 	if (!lgr->is_smcd)  in smc_conn_free()
1276 		smcr_link_put(conn->lnk); /* link_hold in smc_conn_create() */  in smc_conn_free()
1284 	if (is_rmb || buf_desc->is_vm)  in smcr_buf_unmap_link()
1285 		buf_desc->is_reg_mr[lnk->link_idx] = false;  in smcr_buf_unmap_link()
1286 	if (!buf_desc->is_map_ib[lnk->link_idx])  in smcr_buf_unmap_link()
1289 	if ((is_rmb || buf_desc->is_vm) &&  in smcr_buf_unmap_link()
1290 	    buf_desc->mr[lnk->link_idx]) {  in smcr_buf_unmap_link()
1291 		smc_ib_put_memory_region(buf_desc->mr[lnk->link_idx]);  in smcr_buf_unmap_link()
1292 		buf_desc->mr[lnk->link_idx] = NULL;  in smcr_buf_unmap_link()
1299 	sg_free_table(&buf_desc->sgt[lnk->link_idx]);  in smcr_buf_unmap_link()
1300 	buf_desc->is_map_ib[lnk->link_idx] = false;  in smcr_buf_unmap_link()
1306 	struct smc_link_group *lgr = lnk->lgr;  in smcr_buf_unmap_lgr()
1311 		down_write(&lgr->rmbs_lock);  in smcr_buf_unmap_lgr()
1312 		list_for_each_entry_safe(buf_desc, bf, &lgr->rmbs[i], list)  in smcr_buf_unmap_lgr()
1314 		up_write(&lgr->rmbs_lock);  in smcr_buf_unmap_lgr()
1316 		down_write(&lgr->sndbufs_lock);  in smcr_buf_unmap_lgr()
1317 		list_for_each_entry_safe(buf_desc, bf, &lgr->sndbufs[i],  in smcr_buf_unmap_lgr()
1320 		up_write(&lgr->sndbufs_lock);  in smcr_buf_unmap_lgr()
1326 	struct smc_link_group *lgr = lnk->lgr;  in smcr_rtoken_clear_link()
1330 		lgr->rtokens[i][lnk->link_idx].rkey = 0;  in smcr_rtoken_clear_link()
1331 		lgr->rtokens[i][lnk->link_idx].dma_addr = 0;  in smcr_rtoken_clear_link()
1337 	struct smc_link_group *lgr = lnk->lgr;  in __smcr_link_clear()
1342 	put_device(&lnk->smcibdev->ibdev->dev);  in __smcr_link_clear()
1343 	smcibdev = lnk->smcibdev;  in __smcr_link_clear()
1345 	lnk->state = SMC_LNK_UNUSED;  in __smcr_link_clear()
1346 	if (!atomic_dec_return(&smcibdev->lnk_cnt))  in __smcr_link_clear()
1347 		wake_up(&smcibdev->lnks_deleted);  in __smcr_link_clear()
1351 /* must be called under lgr->llc_conf_mutex lock */
1354 	if (!lnk->lgr || lnk->clearing ||  in smcr_link_clear()
1355 	    lnk->state == SMC_LNK_UNUSED)  in smcr_link_clear()
1357 	lnk->clearing = 1;  in smcr_link_clear()
1358 	lnk->peer_qpn = 0;  in smcr_link_clear()
1371 	refcount_inc(&lnk->refcnt);  in smcr_link_hold()
1376 	if (refcount_dec_and_test(&lnk->refcnt))  in smcr_link_put()
1386 		smcr_buf_unmap_link(buf_desc, is_rmb, &lgr->lnk[i]);  in smcr_buf_free()
1388 	if (!buf_desc->is_vm && buf_desc->pages)  in smcr_buf_free()
1389 		__free_pages(buf_desc->pages, buf_desc->order);  in smcr_buf_free()
1390 	else if (buf_desc->is_vm && buf_desc->cpu_addr)  in smcr_buf_free()
1391 		vfree(buf_desc->cpu_addr);  in smcr_buf_free()
1400 		buf_desc->len += sizeof(struct smcd_cdc_msg);  in smcd_buf_free()
1401 		smc_ism_unregister_dmb(lgr->smcd, buf_desc);  in smcd_buf_free()
1403 		kfree(buf_desc->cpu_addr);  in smcd_buf_free()
1411 	if (lgr->is_smcd)  in smc_buf_free()
1425 			buf_list = &lgr->rmbs[i];  in __smc_lgr_free_bufs()
1427 			buf_list = &lgr->sndbufs[i];  in __smc_lgr_free_bufs()
1448 	if (lgr->is_smcd) {  in __smc_lgr_free()
1449 		if (!atomic_dec_return(&lgr->smcd->lgr_cnt))  in __smc_lgr_free()
1450 			wake_up(&lgr->smcd->lgrs_deleted);  in __smc_lgr_free()
1464 	if (!lgr->is_smcd) {  in smc_lgr_free()
1465 		down_write(&lgr->llc_conf_mutex);  in smc_lgr_free()
1467 			if (lgr->lnk[i].state != SMC_LNK_UNUSED)  in smc_lgr_free()
1468 				smcr_link_clear(&lgr->lnk[i], false);  in smc_lgr_free()
1470 		up_write(&lgr->llc_conf_mutex);  in smc_lgr_free()
1474 	destroy_workqueue(lgr->tx_wq);  in smc_lgr_free()
1475 	if (lgr->is_smcd) {  in smc_lgr_free()
1476 		smc_ism_put_vlan(lgr->smcd, lgr->vlan_id);  in smc_lgr_free()
1477 		put_device(lgr->smcd->ops->get_dev(lgr->smcd));  in smc_lgr_free()
1484 	refcount_inc(&lgr->refcnt);  in smc_lgr_hold()
1489 	if (refcount_dec_and_test(&lgr->refcnt))  in smc_lgr_put()
1493 static void smc_sk_wake_ups(struct smc_sock *smc)  in smc_sk_wake_ups()  argument
1495 	smc->sk.sk_write_space(&smc->sk);  in smc_sk_wake_ups()
1496 	smc->sk.sk_data_ready(&smc->sk);  in smc_sk_wake_ups()
1497 	smc->sk.sk_state_change(&smc->sk);  in smc_sk_wake_ups()
1503 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_conn_kill()  local
1505 	if (conn->lgr->is_smcd && conn->lgr->peer_shutdown)  in smc_conn_kill()
1506 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;  in smc_conn_kill()
1509 	conn->killed = 1;  in smc_conn_kill()
1510 	smc->sk.sk_err = ECONNABORTED;  in smc_conn_kill()
1511 	smc_sk_wake_ups(smc);  in smc_conn_kill()
1512 	if (conn->lgr->is_smcd) {  in smc_conn_kill()
1514 		if (smc_ism_support_dmb_nocopy(conn->lgr->smcd))  in smc_conn_kill()
1517 			tasklet_kill(&conn->rx_tsklet);  in smc_conn_kill()
1519 			tasklet_unlock_wait(&conn->rx_tsklet);  in smc_conn_kill()
1524 	smc_close_active_abort(smc);  in smc_conn_kill()
1529 	if (lgr->is_smcd) {  in smc_lgr_cleanup()
1532 		u32 rsn = lgr->llc_termination_rsn;  in smc_lgr_cleanup()
1548 	struct smc_sock *smc;  in __smc_lgr_terminate()  local
1551 	if (lgr->terminating)  in __smc_lgr_terminate()
1553 	/* cancel free_work sync, will terminate when lgr->freeing is set */  in __smc_lgr_terminate()
1554 	cancel_delayed_work(&lgr->free_work);  in __smc_lgr_terminate()
1555 	lgr->terminating = 1;  in __smc_lgr_terminate()
1558 	read_lock_bh(&lgr->conns_lock);  in __smc_lgr_terminate()
1559 	node = rb_first(&lgr->conns_all);  in __smc_lgr_terminate()
1561 		read_unlock_bh(&lgr->conns_lock);  in __smc_lgr_terminate()
1563 		smc = container_of(conn, struct smc_sock, conn);  in __smc_lgr_terminate()
1564 		sock_hold(&smc->sk); /* sock_put below */  in __smc_lgr_terminate()
1565 		lock_sock(&smc->sk);  in __smc_lgr_terminate()
1567 		release_sock(&smc->sk);  in __smc_lgr_terminate()
1568 		sock_put(&smc->sk); /* sock_hold above */  in __smc_lgr_terminate()
1569 		read_lock_bh(&lgr->conns_lock);  in __smc_lgr_terminate()
1570 		node = rb_first(&lgr->conns_all);  in __smc_lgr_terminate()
1572 	read_unlock_bh(&lgr->conns_lock);  in __smc_lgr_terminate()
1584 	if (list_empty(&lgr->list) || lgr->terminating || lgr->freeing) {  in smc_lgr_terminate_sched()
1588 	list_del_init(&lgr->list);  in smc_lgr_terminate_sched()
1589 	lgr->freeing = 1;  in smc_lgr_terminate_sched()
1591 	schedule_work(&lgr->terminate_work);  in smc_lgr_terminate_sched()
1602 	spin_lock_bh(&dev->lgr_lock);  in smc_smcd_terminate()
1603 	list_for_each_entry_safe(lgr, l, &dev->lgr_list, list) {  in smc_smcd_terminate()
1604 		if ((!peer_gid->gid ||  in smc_smcd_terminate()
1605 		     (lgr->peer_gid.gid == peer_gid->gid &&  in smc_smcd_terminate()
1607 		      lgr->peer_gid.gid_ext == peer_gid->gid_ext)) &&  in smc_smcd_terminate()
1608 		    (vlan == VLAN_VID_MASK || lgr->vlan_id == vlan)) {  in smc_smcd_terminate()
1609 			if (peer_gid->gid) /* peer triggered termination */  in smc_smcd_terminate()
1610 				lgr->peer_shutdown = 1;  in smc_smcd_terminate()
1611 			list_move(&lgr->list, &lgr_free_list);  in smc_smcd_terminate()
1612 			lgr->freeing = 1;  in smc_smcd_terminate()
1615 	spin_unlock_bh(&dev->lgr_lock);  in smc_smcd_terminate()
1619 		list_del_init(&lgr->list);  in smc_smcd_terminate()
1620 		schedule_work(&lgr->terminate_work);  in smc_smcd_terminate()
1624 /* Called when an SMCD device is removed or the smc module is unloaded */
1630 	spin_lock_bh(&smcd->lgr_lock);  in smc_smcd_terminate_all()
1631 	list_splice_init(&smcd->lgr_list, &lgr_free_list);  in smc_smcd_terminate_all()
1633 		lgr->freeing = 1;  in smc_smcd_terminate_all()
1634 	spin_unlock_bh(&smcd->lgr_lock);  in smc_smcd_terminate_all()
1637 		list_del_init(&lgr->list);  in smc_smcd_terminate_all()
1641 	if (atomic_read(&smcd->lgr_cnt))  in smc_smcd_terminate_all()
1642 		wait_event(smcd->lgrs_deleted, !atomic_read(&smcd->lgr_cnt));  in smc_smcd_terminate_all()
1645 /* Called when an SMCR device is removed or the smc module is unloaded.
1659 			lgr->freeing = 1;  in smc_smcr_terminate_all()
1663 				if (lgr->lnk[i].smcibdev == smcibdev)  in smc_smcr_terminate_all()
1664 					smcr_link_down_cond_sched(&lgr->lnk[i]);  in smc_smcr_terminate_all()
1671 		list_del_init(&lgr->list);  in smc_smcr_terminate_all()
1677 		if (atomic_read(&smcibdev->lnk_cnt))  in smc_smcr_terminate_all()
1678 			wait_event(smcibdev->lnks_deleted,  in smc_smcr_terminate_all()
1679 				   !atomic_read(&smcibdev->lnk_cnt));  in smc_smcr_terminate_all()
1693 		if (smc_link_usable(&lgr->lnk[i]))  in smcr_lgr_set_type()
1694 			lgr->lnk[i].link_is_asym = false;  in smcr_lgr_set_type()
1695 	if (lgr->type == new_type)  in smcr_lgr_set_type()
1697 	lgr->type = new_type;  in smcr_lgr_set_type()
1699 	switch (lgr->type) {  in smcr_lgr_set_type()
1716 	pr_warn_ratelimited("smc: SMC-R lg %*phN net %llu state changed: "  in smcr_lgr_set_type()
1717 			    "%s, pnetid %.16s\n", SMC_LGR_ID_SIZE, &lgr->id,  in smcr_lgr_set_type()
1718 			    lgr->net->net_cookie, lgr_type, lgr->pnet_id);  in smcr_lgr_set_type()
1726 	lgr->lnk[asym_lnk_idx].link_is_asym = true;  in smcr_lgr_set_type_asym()
1735 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);  in smc_conn_abort_work()  local
1737 	lock_sock(&smc->sk);  in smc_conn_abort_work()
1739 	release_sock(&smc->sk);  in smc_conn_abort_work()
1740 	sock_put(&smc->sk); /* sock_hold done by schedulers of abort_work */  in smc_conn_abort_work()
1751 		if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id,  in smcr_port_add()
1753 		    lgr->type == SMC_LGR_SYMMETRIC ||  in smcr_port_add()
1754 		    lgr->type == SMC_LGR_ASYMMETRIC_PEER ||  in smcr_port_add()
1755 		    !rdma_dev_access_netns(smcibdev->ibdev, lgr->net))  in smcr_port_add()
1758 		if (lgr->type == SMC_LGR_SINGLE && lgr->max_links <= 1)  in smcr_port_add()
1769 /* link is down - switch connections to alternate link,
1770  * must be called under lgr->llc_conf_mutex lock
1774 	struct smc_link_group *lgr = lnk->lgr;  in smcr_link_down()
1778 	if (!lgr || lnk->state == SMC_LNK_UNUSED || list_empty(&lgr->list))  in smcr_link_down()
1787 	del_link_id = lnk->link_id;  in smcr_link_down()
1789 	if (lgr->role == SMC_SERV) {  in smcr_link_down()
1793 		if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) {  in smcr_link_down()
1795 			up_write(&lgr->llc_conf_mutex);  in smcr_link_down()
1796 			wait_event_timeout(lgr->llc_flow_waiter,  in smcr_link_down()
1797 				(list_empty(&lgr->list) ||  in smcr_link_down()
1798 				 lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE),  in smcr_link_down()
1800 			down_write(&lgr->llc_conf_mutex);  in smcr_link_down()
1802 		if (!list_empty(&lgr->list)) {  in smcr_link_down()
1808 		wake_up(&lgr->llc_flow_waiter);	/* wake up next waiter */  in smcr_link_down()
1812 /* must be called under lgr->llc_conf_mutex lock */
1815 	if (smc_link_downing(&lnk->state)) {  in smcr_link_down_cond()
1821 /* will get the lgr->llc_conf_mutex lock */
1824 	if (smc_link_downing(&lnk->state)) {  in smcr_link_down_cond_sched()
1827 		if (!schedule_work(&lnk->link_down_wrk))  in smcr_link_down_cond_sched()
1838 		if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id,  in smcr_port_err()
1841 		if (list_empty(&lgr->list))  in smcr_port_err()
1844 			struct smc_link *lnk = &lgr->lnk[i];  in smcr_port_err()
1847 			    lnk->smcibdev == smcibdev && lnk->ibport == ibport)  in smcr_port_err()
1857 	struct smc_link_group *lgr = link->lgr;  in smc_link_down_work()
1859 	if (list_empty(&lgr->list))  in smc_link_down_work()
1861 	wake_up_all(&lgr->llc_msg_waiter);  in smc_link_down_work()
1862 	down_write(&lgr->llc_conf_mutex);  in smc_link_down_work()
1864 	up_write(&lgr->llc_conf_mutex);  in smc_link_down_work()
1873 	unsigned short *vlan_id = (unsigned short *)priv->data;  in smc_vlan_by_tcpsk_walk()
1886 	struct dst_entry *dst = sk_dst_get(clcsock->sk);  in smc_vlan_by_tcpsk()
1891 	ini->vlan_id = 0;  in smc_vlan_by_tcpsk()
1893 		rc = -ENOTCONN;  in smc_vlan_by_tcpsk()
1896 	if (!dst->dev) {  in smc_vlan_by_tcpsk()
1897 		rc = -ENODEV;  in smc_vlan_by_tcpsk()
1901 	ndev = dst->dev;  in smc_vlan_by_tcpsk()
1903 		ini->vlan_id = vlan_dev_vlan_id(ndev);  in smc_vlan_by_tcpsk()
1907 	priv.data = (void *)&ini->vlan_id;  in smc_vlan_by_tcpsk()
1928 	if (memcmp(lgr->peer_systemid, peer_systemid, SMC_SYSTEMID_LEN) ||  in smcr_lgr_match()
1929 	    lgr->role != role)  in smcr_lgr_match()
1933 		lnk = &lgr->lnk[i];  in smcr_lgr_match()
1937 		/* use verbs API to check netns, instead of lgr->net */  in smcr_lgr_match()
1938 		if (!rdma_dev_access_netns(lnk->smcibdev->ibdev, net))  in smcr_lgr_match()
1940 		if ((lgr->role == SMC_SERV || lnk->peer_qpn == clcqpn) &&  in smcr_lgr_match()
1941 		    !memcmp(lnk->peer_gid, peer_gid, SMC_GID_SIZE) &&  in smcr_lgr_match()
1943 		     !memcmp(lnk->peer_mac, peer_mac_v1, ETH_ALEN)))  in smcr_lgr_match()
1953 	if (lgr->peer_gid.gid != peer_gid->gid ||  in smcd_lgr_match()
1954 	    lgr->smcd != smcismdev)  in smcd_lgr_match()
1958 	    lgr->peer_gid.gid_ext != peer_gid->gid_ext)  in smcd_lgr_match()
1964 /* create a new SMC connection (and a new link group if necessary) */
1965 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)  in smc_conn_create()  argument
1967 	struct smc_connection *conn = &smc->conn;  in smc_conn_create()
1968 	struct net *net = sock_net(&smc->sk);  in smc_conn_create()
1975 	lgr_list = ini->is_smcd ? &ini->ism_dev[ini->ism_selected]->lgr_list :  in smc_conn_create()
1977 	lgr_lock = ini->is_smcd ? &ini->ism_dev[ini->ism_selected]->lgr_lock :  in smc_conn_create()
1979 	ini->first_contact_local = 1;  in smc_conn_create()
1980 	role = smc->listen_smc ? SMC_SERV : SMC_CLNT;  in smc_conn_create()
1981 	if (role == SMC_CLNT && ini->first_contact_peer)  in smc_conn_create()
1988 		write_lock_bh(&lgr->conns_lock);  in smc_conn_create()
1989 		if ((ini->is_smcd ?  in smc_conn_create()
1990 		     smcd_lgr_match(lgr, ini->ism_dev[ini->ism_selected],  in smc_conn_create()
1991 				    &ini->ism_peer_gid[ini->ism_selected]) :  in smc_conn_create()
1992 		     smcr_lgr_match(lgr, ini->smcr_version,  in smc_conn_create()
1993 				    ini->peer_systemid,  in smc_conn_create()
1994 				    ini->peer_gid, ini->peer_mac, role,  in smc_conn_create()
1995 				    ini->ib_clcqpn, net)) &&  in smc_conn_create()
1996 		    !lgr->sync_err &&  in smc_conn_create()
1997 		    (ini->smcd_version == SMC_V2 ||  in smc_conn_create()
1998 		     lgr->vlan_id == ini->vlan_id) &&  in smc_conn_create()
1999 		    (role == SMC_CLNT || ini->is_smcd ||  in smc_conn_create()
2000 		    (lgr->conns_num < lgr->max_conns &&  in smc_conn_create()
2001 		      !bitmap_full(lgr->rtokens_used_mask, SMC_RMBS_PER_LGR_MAX)))) {  in smc_conn_create()
2003 			ini->first_contact_local = 0;  in smc_conn_create()
2004 			conn->lgr = lgr;  in smc_conn_create()
2006 			write_unlock_bh(&lgr->conns_lock);  in smc_conn_create()
2007 			if (!rc && delayed_work_pending(&lgr->free_work))  in smc_conn_create()
2008 				cancel_delayed_work(&lgr->free_work);  in smc_conn_create()
2011 		write_unlock_bh(&lgr->conns_lock);  in smc_conn_create()
2017 	if (role == SMC_CLNT && !ini->first_contact_peer &&  in smc_conn_create()
2018 	    ini->first_contact_local) {  in smc_conn_create()
2027 	if (ini->first_contact_local) {  in smc_conn_create()
2028 		rc = smc_lgr_create(smc, ini);  in smc_conn_create()
2031 		lgr = conn->lgr;  in smc_conn_create()
2032 		write_lock_bh(&lgr->conns_lock);  in smc_conn_create()
2034 		write_unlock_bh(&lgr->conns_lock);  in smc_conn_create()
2040 	smc_lgr_hold(conn->lgr); /* lgr_put in smc_conn_free() */  in smc_conn_create()
2041 	if (!conn->lgr->is_smcd)  in smc_conn_create()
2042 		smcr_link_hold(conn->lnk); /* link_put in smc_conn_free() */  in smc_conn_create()
2043 	conn->freed = 0;  in smc_conn_create()
2044 	conn->local_tx_ctrl.common.type = SMC_CDC_MSG_TYPE;  in smc_conn_create()
2045 	conn->local_tx_ctrl.len = SMC_WR_TX_SIZE;  in smc_conn_create()
2046 	conn->urg_state = SMC_URG_READ;  in smc_conn_create()
2047 	init_waitqueue_head(&conn->cdc_pend_tx_wq);  in smc_conn_create()
2048 	INIT_WORK(&smc->conn.abort_work, smc_conn_abort_work);  in smc_conn_create()
2049 	if (ini->is_smcd) {  in smc_conn_create()
2050 		conn->rx_off = sizeof(struct smcd_cdc_msg);  in smc_conn_create()
2053 		conn->rx_off = 0;  in smc_conn_create()
2056 	spin_lock_init(&conn->acurs_lock);  in smc_conn_create()
2063 #define SMCD_DMBE_SIZES		6 /* 0 -> 16KB, 1 -> 32KB, .. 6 -> 1MB */
2064 #define SMCR_RMBE_SIZES		15 /* 0 -> 16KB, 1 -> 32KB, .. 15 -> 512MB */
2078 	size = (size - 1) >> 14;  /* convert to 16K multiple */  in smc_compress_bufsize()
2110 		if (cmpxchg(&buf_slot->used, 0, 1) == 0) {  in smc_buf_get_slot()
2136 	if (buf_desc->is_map_ib[lnk->link_idx])  in smcr_buf_map_link()
2139 	if (buf_desc->is_vm) {  in smcr_buf_map_link()
2140 		buf = buf_desc->cpu_addr;  in smcr_buf_map_link()
2141 		buf_size = buf_desc->len;  in smcr_buf_map_link()
2142 		offset = offset_in_page(buf_desc->cpu_addr);  in smcr_buf_map_link()
2148 	rc = sg_alloc_table(&buf_desc->sgt[lnk->link_idx], nents, GFP_KERNEL);  in smcr_buf_map_link()
2152 	if (buf_desc->is_vm) {  in smcr_buf_map_link()
2154 		for_each_sg(buf_desc->sgt[lnk->link_idx].sgl, sg, nents, i) {  in smcr_buf_map_link()
2155 			size = min_t(int, PAGE_SIZE - offset, buf_size);  in smcr_buf_map_link()
2158 			buf_size -= size;  in smcr_buf_map_link()
2163 		sg_set_buf(buf_desc->sgt[lnk->link_idx].sgl,  in smcr_buf_map_link()
2164 			   buf_desc->cpu_addr, buf_desc->len);  in smcr_buf_map_link()
2170 	/* SMC protocol depends on mapping to one DMA address only */  in smcr_buf_map_link()
2172 		rc = -EAGAIN;  in smcr_buf_map_link()
2176 	buf_desc->is_dma_need_sync |=  in smcr_buf_map_link()
2177 		smc_ib_is_sg_need_sync(lnk, buf_desc) << lnk->link_idx;  in smcr_buf_map_link()
2179 	if (is_rmb || buf_desc->is_vm) {  in smcr_buf_map_link()
2185 		rc = smc_ib_get_memory_region(lnk->roce_pd, access_flags,  in smcr_buf_map_link()
2186 					      buf_desc, lnk->link_idx);  in smcr_buf_map_link()
2192 	buf_desc->is_map_ib[lnk->link_idx] = true;  in smcr_buf_map_link()
2199 	sg_free_table(&buf_desc->sgt[lnk->link_idx]);  in smcr_buf_map_link()
2204  * must be called under lgr->llc_conf_mutex lock
2208 	if (list_empty(&link->lgr->list))  in smcr_link_reg_buf()
2209 		return -ENOLINK;  in smcr_link_reg_buf()
2210 	if (!buf_desc->is_reg_mr[link->link_idx]) {  in smcr_link_reg_buf()
2212 		if (buf_desc->is_vm)  in smcr_link_reg_buf()
2213 			buf_desc->mr[link->link_idx]->iova =  in smcr_link_reg_buf()
2214 				(uintptr_t)buf_desc->cpu_addr;  in smcr_link_reg_buf()
2215 		if (smc_wr_reg_send(link, buf_desc->mr[link->link_idx])) {  in smcr_link_reg_buf()
2216 			buf_desc->is_reg_err = true;  in smcr_link_reg_buf()
2217 			return -EFAULT;  in smcr_link_reg_buf()
2219 		buf_desc->is_reg_mr[link->link_idx] = true;  in smcr_link_reg_buf()
2232 		if (!buf_desc->used)  in _smcr_buf_map_lgr()
2246 	struct smc_link_group *lgr = lnk->lgr;  in smcr_buf_map_lgr()
2250 		rc = _smcr_buf_map_lgr(lnk, &lgr->rmbs_lock,  in smcr_buf_map_lgr()
2251 				       &lgr->rmbs[i], true);  in smcr_buf_map_lgr()
2254 		rc = _smcr_buf_map_lgr(lnk, &lgr->sndbufs_lock,  in smcr_buf_map_lgr()
2255 				       &lgr->sndbufs[i], false);  in smcr_buf_map_lgr()
2263  * must be called under lgr->llc_conf_mutex lock
2267 	struct smc_link_group *lgr = lnk->lgr;  in smcr_buf_reg_lgr()
2272 	down_write(&lgr->rmbs_lock);  in smcr_buf_reg_lgr()
2274 		list_for_each_entry_safe(buf_desc, bf, &lgr->rmbs[i], list) {  in smcr_buf_reg_lgr()
2275 			if (!buf_desc->used)  in smcr_buf_reg_lgr()
2279 				up_write(&lgr->rmbs_lock);  in smcr_buf_reg_lgr()
2284 	up_write(&lgr->rmbs_lock);  in smcr_buf_reg_lgr()
2286 	if (lgr->buf_type == SMCR_PHYS_CONT_BUFS)  in smcr_buf_reg_lgr()
2290 	down_write(&lgr->sndbufs_lock);  in smcr_buf_reg_lgr()
2292 		list_for_each_entry_safe(buf_desc, bf, &lgr->sndbufs[i], list) {  in smcr_buf_reg_lgr()
2293 			if (!buf_desc->used || !buf_desc->is_vm)  in smcr_buf_reg_lgr()
2297 				up_write(&lgr->sndbufs_lock);  in smcr_buf_reg_lgr()
2302 	up_write(&lgr->sndbufs_lock);  in smcr_buf_reg_lgr()
2314 		return ERR_PTR(-ENOMEM);  in smcr_new_buf_create()
2316 	switch (lgr->buf_type) {  in smcr_new_buf_create()
2319 		buf_desc->order = get_order(bufsize);  in smcr_new_buf_create()
2320 		buf_desc->pages = alloc_pages(GFP_KERNEL | __GFP_NOWARN |  in smcr_new_buf_create()
2323 					      buf_desc->order);  in smcr_new_buf_create()
2324 		if (buf_desc->pages) {  in smcr_new_buf_create()
2325 			buf_desc->cpu_addr =  in smcr_new_buf_create()
2326 				(void *)page_address(buf_desc->pages);  in smcr_new_buf_create()
2327 			buf_desc->len = bufsize;  in smcr_new_buf_create()
2328 			buf_desc->is_vm = false;  in smcr_new_buf_create()
2331 		if (lgr->buf_type == SMCR_PHYS_CONT_BUFS)  in smcr_new_buf_create()
2335 		buf_desc->order = get_order(bufsize);  in smcr_new_buf_create()
2336 		buf_desc->cpu_addr = vzalloc(PAGE_SIZE << buf_desc->order);  in smcr_new_buf_create()
2337 		if (!buf_desc->cpu_addr)  in smcr_new_buf_create()
2339 		buf_desc->pages = NULL;  in smcr_new_buf_create()
2340 		buf_desc->len = bufsize;  in smcr_new_buf_create()
2341 		buf_desc->is_vm = true;  in smcr_new_buf_create()
2348 	return ERR_PTR(-EAGAIN);  in smcr_new_buf_create()
2360 	down_read(&lgr->llc_conf_mutex);  in smcr_buf_map_usable_links()
2362 		struct smc_link *lnk = &lgr->lnk[i];  in smcr_buf_map_usable_links()
2367 			rc = -ENOMEM;  in smcr_buf_map_usable_links()
2373 	up_read(&lgr->llc_conf_mutex);  in smcr_buf_map_usable_links()
2375 		rc = -EINVAL;  in smcr_buf_map_usable_links()
2388 		return ERR_PTR(-ENOMEM);  in smcd_new_buf_create()
2393 			if (rc == -ENOMEM)  in smcd_new_buf_create()
2394 				return ERR_PTR(-EAGAIN);  in smcd_new_buf_create()
2395 			if (rc == -ENOSPC)  in smcd_new_buf_create()
2396 				return ERR_PTR(-ENOSPC);  in smcd_new_buf_create()
2397 			return ERR_PTR(-EIO);  in smcd_new_buf_create()
2399 		buf_desc->pages = virt_to_page(buf_desc->cpu_addr);  in smcd_new_buf_create()
2401 		buf_desc->len = bufsize - sizeof(struct smcd_cdc_msg);  in smcd_new_buf_create()
2403 		buf_desc->cpu_addr = kzalloc(bufsize, GFP_KERNEL |  in smcd_new_buf_create()
2406 		if (!buf_desc->cpu_addr) {  in smcd_new_buf_create()
2408 			return ERR_PTR(-EAGAIN);  in smcd_new_buf_create()
2410 		buf_desc->len = bufsize;  in smcd_new_buf_create()
2415 static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb)  in __smc_buf_create()  argument
2417 	struct smc_buf_desc *buf_desc = ERR_PTR(-ENOMEM);  in __smc_buf_create()
2418 	struct smc_connection *conn = &smc->conn;  in __smc_buf_create()
2419 	struct smc_link_group *lgr = conn->lgr;  in __smc_buf_create()
2427 		bufsize = smc->sk.sk_rcvbuf / 2;  in __smc_buf_create()
2430 		bufsize = smc->sk.sk_sndbuf / 2;  in __smc_buf_create()
2433 	     bufsize_comp >= 0; bufsize_comp--) {  in __smc_buf_create()
2435 			lock = &lgr->rmbs_lock;  in __smc_buf_create()
2436 			buf_list = &lgr->rmbs[bufsize_comp];  in __smc_buf_create()
2438 			lock = &lgr->sndbufs_lock;  in __smc_buf_create()
2439 			buf_list = &lgr->sndbufs[bufsize_comp];  in __smc_buf_create()
2446 			buf_desc->is_dma_need_sync = 0;  in __smc_buf_create()
2447 			SMC_STAT_RMB_SIZE(smc, is_smcd, is_rmb, true, bufsize);  in __smc_buf_create()
2448 			SMC_STAT_BUF_REUSE(smc, is_smcd, is_rmb);  in __smc_buf_create()
2457 		if (PTR_ERR(buf_desc) == -ENOMEM)  in __smc_buf_create()
2462 				SMC_STAT_RMB_DOWNGRADED(smc, is_smcd, is_rmb);  in __smc_buf_create()
2467 		SMC_STAT_RMB_ALLOC(smc, is_smcd, is_rmb);  in __smc_buf_create()
2468 		SMC_STAT_RMB_SIZE(smc, is_smcd, is_rmb, true, bufsize);  in __smc_buf_create()
2469 		buf_desc->used = 1;  in __smc_buf_create()
2482 			return -ENOMEM;  in __smc_buf_create()
2487 		conn->rmb_desc = buf_desc;  in __smc_buf_create()
2488 		conn->rmbe_size_comp = bufsize_comp;  in __smc_buf_create()
2489 		smc->sk.sk_rcvbuf = bufsize * 2;  in __smc_buf_create()
2490 		atomic_set(&conn->bytes_to_rcv, 0);  in __smc_buf_create()
2491 		conn->rmbe_update_limit =  in __smc_buf_create()
2492 			smc_rmb_wnd_update_limit(buf_desc->len);  in __smc_buf_create()
2496 		conn->sndbuf_desc = buf_desc;  in __smc_buf_create()
2497 		smc->sk.sk_sndbuf = bufsize * 2;  in __smc_buf_create()
2498 		atomic_set(&conn->sndbuf_space, bufsize);  in __smc_buf_create()
2505 	if (!conn->sndbuf_desc->is_dma_need_sync)  in smc_sndbuf_sync_sg_for_device()
2507 	if (!smc_conn_lgr_valid(conn) || conn->lgr->is_smcd ||  in smc_sndbuf_sync_sg_for_device()
2508 	    !smc_link_active(conn->lnk))  in smc_sndbuf_sync_sg_for_device()
2510 	smc_ib_sync_sg_for_device(conn->lnk, conn->sndbuf_desc, DMA_TO_DEVICE);  in smc_sndbuf_sync_sg_for_device()
2517 	if (!conn->rmb_desc->is_dma_need_sync)  in smc_rmb_sync_sg_for_cpu()
2519 	if (!smc_conn_lgr_valid(conn) || conn->lgr->is_smcd)  in smc_rmb_sync_sg_for_cpu()
2522 		if (!smc_link_active(&conn->lgr->lnk[i]))  in smc_rmb_sync_sg_for_cpu()
2524 		smc_ib_sync_sg_for_cpu(&conn->lgr->lnk[i], conn->rmb_desc,  in smc_rmb_sync_sg_for_cpu()
2529 /* create the send and receive buffer for an SMC socket;
2531  * (even though the SMC protocol allows more than one RMB-element per RMB,
2532  * the Linux implementation uses just one RMB-element per RMB, i.e. uses an
2535 int smc_buf_create(struct smc_sock *smc, bool is_smcd)  in smc_buf_create()  argument
2541 	    smc_ism_support_dmb_nocopy(smc->conn.lgr->smcd))  in smc_buf_create()
2544 	rc = __smc_buf_create(smc, is_smcd, false);  in smc_buf_create()
2550 	rc = __smc_buf_create(smc, is_smcd, true);  in smc_buf_create()
2551 	if (rc && smc->conn.sndbuf_desc) {  in smc_buf_create()
2552 		down_write(&smc->conn.lgr->sndbufs_lock);  in smc_buf_create()
2553 		smc_lgr_buf_list_del(smc->conn.lgr, false,  in smc_buf_create()
2554 				     smc->conn.sndbuf_desc);  in smc_buf_create()
2555 		up_write(&smc->conn.lgr->sndbufs_lock);  in smc_buf_create()
2556 		smc_buf_free(smc->conn.lgr, false, smc->conn.sndbuf_desc);  in smc_buf_create()
2557 		smc->conn.sndbuf_desc = NULL;  in smc_buf_create()
2562 int smcd_buf_attach(struct smc_sock *smc)  in smcd_buf_attach()  argument
2564 	struct smc_connection *conn = &smc->conn;  in smcd_buf_attach()
2565 	struct smcd_dev *smcd = conn->lgr->smcd;  in smcd_buf_attach()
2566 	u64 peer_token = conn->peer_token;  in smcd_buf_attach()
2572 		return -ENOMEM;  in smcd_buf_attach()
2583 	smc->sk.sk_sndbuf = buf_desc->len;  in smcd_buf_attach()
2584 	buf_desc->cpu_addr =  in smcd_buf_attach()
2585 		(u8 *)buf_desc->cpu_addr + sizeof(struct smcd_cdc_msg);  in smcd_buf_attach()
2586 	buf_desc->len -= sizeof(struct smcd_cdc_msg);  in smcd_buf_attach()
2587 	conn->sndbuf_desc = buf_desc;  in smcd_buf_attach()
2588 	conn->sndbuf_desc->used = 1;  in smcd_buf_attach()
2589 	atomic_set(&conn->sndbuf_space, conn->sndbuf_desc->len);  in smcd_buf_attach()
2601 	for_each_clear_bit(i, lgr->rtokens_used_mask, SMC_RMBS_PER_LGR_MAX) {  in smc_rmb_reserve_rtoken_idx()
2602 		if (!test_and_set_bit(i, lgr->rtokens_used_mask))  in smc_rmb_reserve_rtoken_idx()
2605 	return -ENOSPC;  in smc_rmb_reserve_rtoken_idx()
2614 		if (test_bit(i, lgr->rtokens_used_mask) &&  in smc_rtoken_find_by_link()
2615 		    lgr->rtokens[i][lnk_idx].rkey == rkey)  in smc_rtoken_find_by_link()
2618 	return -ENOENT;  in smc_rtoken_find_by_link()
2628 	if (rtok_idx == -ENOENT)  in smc_rtoken_set()
2630 	lgr->rtokens[rtok_idx][link_idx_new].rkey = ntohl(nw_rkey);  in smc_rtoken_set()
2631 	lgr->rtokens[rtok_idx][link_idx_new].dma_addr = be64_to_cpu(nw_vaddr);  in smc_rtoken_set()
2644 		if (lgr->lnk[link_idx].link_id == link_id) {  in smc_rtoken_set2()
2651 	lgr->rtokens[rtok_idx][link_idx].rkey = rkey;  in smc_rtoken_set2()
2652 	lgr->rtokens[rtok_idx][link_idx].dma_addr = dma_addr;  in smc_rtoken_set2()
2664 		if (lgr->rtokens[i][lnk->link_idx].rkey == rkey &&  in smc_rtoken_add()
2665 		    lgr->rtokens[i][lnk->link_idx].dma_addr == dma_addr &&  in smc_rtoken_add()
2666 		    test_bit(i, lgr->rtokens_used_mask)) {  in smc_rtoken_add()
2674 	lgr->rtokens[i][lnk->link_idx].rkey = rkey;  in smc_rtoken_add()
2675 	lgr->rtokens[i][lnk->link_idx].dma_addr = dma_addr;  in smc_rtoken_add()
2687 		if (lgr->rtokens[i][lnk->link_idx].rkey == rkey &&  in smc_rtoken_delete()
2688 		    test_bit(i, lgr->rtokens_used_mask)) {  in smc_rtoken_delete()
2690 				lgr->rtokens[i][j].rkey = 0;  in smc_rtoken_delete()
2691 				lgr->rtokens[i][j].dma_addr = 0;  in smc_rtoken_delete()
2693 			clear_bit(i, lgr->rtokens_used_mask);  in smc_rtoken_delete()
2697 	return -ENOENT;  in smc_rtoken_delete()
2705 	conn->rtoken_idx = smc_rtoken_add(lnk, clc->r0.rmb_dma_addr,  in smc_rmb_rtoken_handling()
2706 					  clc->r0.rmb_rkey);  in smc_rmb_rtoken_handling()
2707 	if (conn->rtoken_idx < 0)  in smc_rmb_rtoken_handling()
2708 		return conn->rtoken_idx;  in smc_rmb_rtoken_handling()
2722 			set_bit(i, smcibdev->ports_going_away);  in smc_core_going_away()
2728 		smcd->going_away = 1;  in smc_core_going_away()
2733 /* Clean up all SMC link groups */