Lines Matching +full:smc +full:- +full:id
1 // SPDX-License-Identifier: GPL-2.0
3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
20 #include <linux/smc.h>
26 #include "smc.h"
61 if (lgr->is_smcd) { in smc_lgr_list_head()
62 *lgr_lock = &lgr->smcd->lgr_lock; in smc_lgr_list_head()
63 return &lgr->smcd->lgr_list; in smc_lgr_list_head()
72 atomic_inc(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]); in smc_ibdev_cnt_inc()
77 atomic_dec(&lnk->smcibdev->lnk_cnt_by_port[lnk->ibport - 1]); in smc_ibdev_cnt_dec()
84 * otherwise there is a risk of out-of-sync link groups. in smc_lgr_schedule_free_work()
86 if (!lgr->freeing) { in smc_lgr_schedule_free_work()
87 mod_delayed_work(system_wq, &lgr->free_work, in smc_lgr_schedule_free_work()
88 (!lgr->is_smcd && lgr->role == SMC_CLNT) ? in smc_lgr_schedule_free_work()
97 * @smc connection to register
103 u32 token = conn->alert_token_local; in smc_lgr_add_alert_token()
105 link = &conn->lgr->conns_all.rb_node; in smc_lgr_add_alert_token()
111 if (cur->alert_token_local > token) in smc_lgr_add_alert_token()
112 link = &parent->rb_left; in smc_lgr_add_alert_token()
114 link = &parent->rb_right; in smc_lgr_add_alert_token()
117 rb_link_node(&conn->alert_node, parent, link); in smc_lgr_add_alert_token()
118 rb_insert_color(&conn->alert_node, &conn->lgr->conns_all); in smc_lgr_add_alert_token()
121 /* assign an SMC-R link to the connection */
130 struct smc_link *lnk = &conn->lgr->lnk[i]; in smcr_lgr_conn_assign_link()
132 if (lnk->state != expected || lnk->link_is_asym) in smcr_lgr_conn_assign_link()
134 if (conn->lgr->role == SMC_CLNT) { in smcr_lgr_conn_assign_link()
135 conn->lnk = lnk; /* temporary, SMC server assigns link*/ in smcr_lgr_conn_assign_link()
138 if (conn->lgr->conns_num % 2) { in smcr_lgr_conn_assign_link()
142 lnk2 = &conn->lgr->lnk[j]; in smcr_lgr_conn_assign_link()
143 if (lnk2->state == expected && in smcr_lgr_conn_assign_link()
144 !lnk2->link_is_asym) { in smcr_lgr_conn_assign_link()
145 conn->lnk = lnk2; in smcr_lgr_conn_assign_link()
150 if (!conn->lnk) in smcr_lgr_conn_assign_link()
151 conn->lnk = lnk; in smcr_lgr_conn_assign_link()
154 if (!conn->lnk) in smcr_lgr_conn_assign_link()
156 atomic_inc(&conn->lnk->conn_cnt); in smcr_lgr_conn_assign_link()
167 struct smc_sock *smc = container_of(conn, struct smc_sock, conn); in smc_lgr_register_conn() local
171 if (!conn->lgr->is_smcd) { in smc_lgr_register_conn()
179 sock_hold(&smc->sk); /* sock_put in smc_lgr_unregister_conn() */ in smc_lgr_register_conn()
180 while (!conn->alert_token_local) { in smc_lgr_register_conn()
181 conn->alert_token_local = atomic_inc_return(&nexttoken); in smc_lgr_register_conn()
182 if (smc_lgr_find_conn(conn->alert_token_local, conn->lgr)) in smc_lgr_register_conn()
183 conn->alert_token_local = 0; in smc_lgr_register_conn()
186 conn->lgr->conns_num++; in smc_lgr_register_conn()
194 struct smc_sock *smc = container_of(conn, struct smc_sock, conn); in __smc_lgr_unregister_conn() local
195 struct smc_link_group *lgr = conn->lgr; in __smc_lgr_unregister_conn()
197 rb_erase(&conn->alert_node, &lgr->conns_all); in __smc_lgr_unregister_conn()
198 if (conn->lnk) in __smc_lgr_unregister_conn()
199 atomic_dec(&conn->lnk->conn_cnt); in __smc_lgr_unregister_conn()
200 lgr->conns_num--; in __smc_lgr_unregister_conn()
201 conn->alert_token_local = 0; in __smc_lgr_unregister_conn()
202 sock_put(&smc->sk); /* sock_hold in smc_lgr_register_conn() */ in __smc_lgr_unregister_conn()
209 struct smc_link_group *lgr = conn->lgr; in smc_lgr_unregister_conn()
213 write_lock_bh(&lgr->conns_lock); in smc_lgr_unregister_conn()
214 if (conn->alert_token_local) { in smc_lgr_unregister_conn()
217 write_unlock_bh(&lgr->conns_lock); in smc_lgr_unregister_conn()
218 conn->lgr = NULL; in smc_lgr_unregister_conn()
232 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, in smc_nl_get_sys_info()
237 if (cb_ctx->pos[0]) in smc_nl_get_sys_info()
269 cb_ctx->pos[0] = 1; in smc_nl_get_sys_info()
270 return skb->len; in smc_nl_get_sys_info()
277 return skb->len; in smc_nl_get_sys_info()
291 if (nla_put_u32(skb, SMC_NLA_LGR_R_ID, *((u32 *)&lgr->id))) in smc_nl_fill_lgr()
293 if (nla_put_u32(skb, SMC_NLA_LGR_R_CONNS_NUM, lgr->conns_num)) in smc_nl_fill_lgr()
295 if (nla_put_u8(skb, SMC_NLA_LGR_R_ROLE, lgr->role)) in smc_nl_fill_lgr()
297 if (nla_put_u8(skb, SMC_NLA_LGR_R_TYPE, lgr->type)) in smc_nl_fill_lgr()
299 if (nla_put_u8(skb, SMC_NLA_LGR_R_VLAN_ID, lgr->vlan_id)) in smc_nl_fill_lgr()
301 memcpy(smc_target, lgr->pnet_id, SMC_MAX_PNETID_LEN); in smc_nl_fill_lgr()
311 return -EMSGSIZE; in smc_nl_fill_lgr()
325 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, in smc_nl_fill_lgr_link()
335 if (nla_put_u8(skb, SMC_NLA_LINK_ID, link->link_id)) in smc_nl_fill_lgr_link()
337 if (nla_put_u32(skb, SMC_NLA_LINK_STATE, link->state)) in smc_nl_fill_lgr_link()
340 atomic_read(&link->conn_cnt))) in smc_nl_fill_lgr_link()
342 if (nla_put_u8(skb, SMC_NLA_LINK_IB_PORT, link->ibport)) in smc_nl_fill_lgr_link()
344 if (nla_put_u32(skb, SMC_NLA_LINK_NET_DEV, link->ndev_ifidx)) in smc_nl_fill_lgr_link()
346 snprintf(smc_ibname, sizeof(smc_ibname), "%s", link->ibname); in smc_nl_fill_lgr_link()
349 memcpy(&link_uid, link->link_uid, sizeof(link_uid)); in smc_nl_fill_lgr_link()
352 memcpy(&link_uid, link->peer_link_uid, sizeof(link_uid)); in smc_nl_fill_lgr_link()
356 smc_gid_be16_convert(smc_gid_target, link->gid); in smc_nl_fill_lgr_link()
360 smc_gid_be16_convert(smc_gid_target, link->peer_gid); in smc_nl_fill_lgr_link()
372 return -EMSGSIZE; in smc_nl_fill_lgr_link()
383 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, in smc_nl_handle_lgr()
395 if (!smc_link_usable(&lgr->lnk[i])) in smc_nl_handle_lgr()
397 if (smc_nl_fill_lgr_link(lgr, &lgr->lnk[i], skb, cb)) in smc_nl_handle_lgr()
406 return -EMSGSIZE; in smc_nl_handle_lgr()
416 int snum = cb_ctx->pos[0]; in smc_nl_fill_lgr_list()
419 spin_lock_bh(&smc_lgr->lock); in smc_nl_fill_lgr_list()
420 list_for_each_entry(lgr, &smc_lgr->list, list) { in smc_nl_fill_lgr_list()
429 spin_unlock_bh(&smc_lgr->lock); in smc_nl_fill_lgr_list()
430 cb_ctx->pos[0] = num; in smc_nl_fill_lgr_list()
444 nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, in smc_nl_fill_smcd_lgr()
454 if (nla_put_u32(skb, SMC_NLA_LGR_D_ID, *((u32 *)&lgr->id))) in smc_nl_fill_smcd_lgr()
456 if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_GID, lgr->smcd->local_gid, in smc_nl_fill_smcd_lgr()
459 if (nla_put_u64_64bit(skb, SMC_NLA_LGR_D_PEER_GID, lgr->peer_gid, in smc_nl_fill_smcd_lgr()
462 if (nla_put_u8(skb, SMC_NLA_LGR_D_VLAN_ID, lgr->vlan_id)) in smc_nl_fill_smcd_lgr()
464 if (nla_put_u32(skb, SMC_NLA_LGR_D_CONNS_NUM, lgr->conns_num)) in smc_nl_fill_smcd_lgr()
466 if (nla_put_u32(skb, SMC_NLA_LGR_D_CHID, smc_ism_get_chid(lgr->smcd))) in smc_nl_fill_smcd_lgr()
468 memcpy(smc_pnet, lgr->smcd->pnetid, SMC_MAX_PNETID_LEN); in smc_nl_fill_smcd_lgr()
476 if (nla_put_u8(skb, SMC_NLA_LGR_V2_VER, lgr->smc_version)) in smc_nl_fill_smcd_lgr()
478 if (nla_put_u8(skb, SMC_NLA_LGR_V2_REL, lgr->peer_smc_release)) in smc_nl_fill_smcd_lgr()
480 if (nla_put_u8(skb, SMC_NLA_LGR_V2_OS, lgr->peer_os)) in smc_nl_fill_smcd_lgr()
482 memcpy(smc_host, lgr->peer_hostname, SMC_MAX_HOSTNAME_LEN); in smc_nl_fill_smcd_lgr()
486 memcpy(smc_eid, lgr->negotiated_eid, SMC_MAX_EID_LEN); in smc_nl_fill_smcd_lgr()
503 return -EMSGSIZE; in smc_nl_fill_smcd_lgr()
512 int snum = cb_ctx->pos[1]; in smc_nl_handle_smcd_lgr()
515 spin_lock_bh(&dev->lgr_lock); in smc_nl_handle_smcd_lgr()
516 list_for_each_entry(lgr, &dev->lgr_list, list) { in smc_nl_handle_smcd_lgr()
517 if (!lgr->is_smcd) in smc_nl_handle_smcd_lgr()
528 spin_unlock_bh(&dev->lgr_lock); in smc_nl_handle_smcd_lgr()
529 cb_ctx->pos[1] = num; in smc_nl_handle_smcd_lgr()
539 int snum = cb_ctx->pos[0]; in smc_nl_fill_smcd_dev()
542 mutex_lock(&dev_list->mutex); in smc_nl_fill_smcd_dev()
543 list_for_each_entry(smcd_dev, &dev_list->list, list) { in smc_nl_fill_smcd_dev()
544 if (list_empty(&smcd_dev->lgr_list)) in smc_nl_fill_smcd_dev()
555 mutex_unlock(&dev_list->mutex); in smc_nl_fill_smcd_dev()
556 cb_ctx->pos[0] = num; in smc_nl_fill_smcd_dev()
565 return skb->len; in smcr_nl_get_lgr()
573 return skb->len; in smcr_nl_get_link()
579 return skb->len; in smcd_nl_get_lgr()
584 struct smc_link_group *lgr = conn->lgr; in smc_lgr_cleanup_early()
606 struct smc_link *lnk = &lgr->lnk[i]; in smcr_lgr_link_deactivate_all()
609 lnk->state = SMC_LNK_INACTIVE; in smcr_lgr_link_deactivate_all()
611 wake_up_all(&lgr->llc_msg_waiter); in smcr_lgr_link_deactivate_all()
612 wake_up_all(&lgr->llc_flow_waiter); in smcr_lgr_link_deactivate_all()
627 if (lgr->freeing) { in smc_lgr_free_work()
631 read_lock_bh(&lgr->conns_lock); in smc_lgr_free_work()
632 conns = RB_EMPTY_ROOT(&lgr->conns_all); in smc_lgr_free_work()
633 read_unlock_bh(&lgr->conns_lock); in smc_lgr_free_work()
638 list_del_init(&lgr->list); /* remove from smc_lgr_list */ in smc_lgr_free_work()
639 lgr->freeing = 1; /* this instance does the freeing, no new schedule */ in smc_lgr_free_work()
641 cancel_delayed_work(&lgr->free_work); in smc_lgr_free_work()
643 if (!lgr->is_smcd && !lgr->terminating) in smc_lgr_free_work()
646 if (lgr->is_smcd && !lgr->terminating) in smc_lgr_free_work()
648 if (!lgr->is_smcd) in smc_lgr_free_work()
661 /* return next unique link id for the lgr */
668 link_id = ++lgr->next_link_id; in smcr_next_link_id()
670 link_id = ++lgr->next_link_id; in smcr_next_link_id()
672 if (smc_link_usable(&lgr->lnk[i]) && in smcr_next_link_id()
673 lgr->lnk[i].link_id == link_id) in smcr_next_link_id()
683 struct smc_ib_device *smcibdev = link->smcibdev; in smcr_copy_dev_info_to_link()
685 snprintf(link->ibname, sizeof(link->ibname), "%s", in smcr_copy_dev_info_to_link()
686 smcibdev->ibdev->name); in smcr_copy_dev_info_to_link()
687 link->ndev_ifidx = smcibdev->ndev_ifidx[link->ibport - 1]; in smcr_copy_dev_info_to_link()
696 get_device(&ini->ib_dev->ibdev->dev); in smcr_link_init()
697 atomic_inc(&ini->ib_dev->lnk_cnt); in smcr_link_init()
698 lnk->link_id = smcr_next_link_id(lgr); in smcr_link_init()
699 lnk->lgr = lgr; in smcr_link_init()
700 lnk->link_idx = link_idx; in smcr_link_init()
701 lnk->smcibdev = ini->ib_dev; in smcr_link_init()
702 lnk->ibport = ini->ib_port; in smcr_link_init()
705 lnk->path_mtu = ini->ib_dev->pattr[ini->ib_port - 1].active_mtu; in smcr_link_init()
706 atomic_set(&lnk->conn_cnt, 0); in smcr_link_init()
708 INIT_WORK(&lnk->link_down_wrk, smc_link_down_work); in smcr_link_init()
709 if (!ini->ib_dev->initialized) { in smcr_link_init()
710 rc = (int)smc_ib_setup_per_ibdev(ini->ib_dev); in smcr_link_init()
715 lnk->psn_initial = rndvec[0] + (rndvec[1] << 8) + in smcr_link_init()
717 rc = smc_ib_determine_gid(lnk->smcibdev, lnk->ibport, in smcr_link_init()
718 ini->vlan_id, lnk->gid, &lnk->sgid_index); in smcr_link_init()
736 lnk->state = SMC_LNK_ACTIVATING; in smcr_link_init()
749 put_device(&ini->ib_dev->ibdev->dev); in smcr_link_init()
751 lnk->state = SMC_LNK_UNUSED; in smcr_link_init()
752 if (!atomic_dec_return(&ini->ib_dev->lnk_cnt)) in smcr_link_init()
753 wake_up(&ini->ib_dev->lnks_deleted); in smcr_link_init()
757 /* create a new SMC link group */
758 static int smc_lgr_create(struct smc_sock *smc, struct smc_init_info *ini) in smc_lgr_create() argument
768 if (ini->is_smcd && ini->vlan_id) { in smc_lgr_create()
769 if (smc_ism_get_vlan(ini->ism_dev[ini->ism_selected], in smc_lgr_create()
770 ini->vlan_id)) { in smc_lgr_create()
781 lgr->tx_wq = alloc_workqueue("smc_tx_wq-%*phN", 0, 0, in smc_lgr_create()
782 SMC_LGR_ID_SIZE, &lgr->id); in smc_lgr_create()
783 if (!lgr->tx_wq) { in smc_lgr_create()
784 rc = -ENOMEM; in smc_lgr_create()
787 lgr->is_smcd = ini->is_smcd; in smc_lgr_create()
788 lgr->sync_err = 0; in smc_lgr_create()
789 lgr->terminating = 0; in smc_lgr_create()
790 lgr->freeing = 0; in smc_lgr_create()
791 lgr->vlan_id = ini->vlan_id; in smc_lgr_create()
792 mutex_init(&lgr->sndbufs_lock); in smc_lgr_create()
793 mutex_init(&lgr->rmbs_lock); in smc_lgr_create()
794 rwlock_init(&lgr->conns_lock); in smc_lgr_create()
796 INIT_LIST_HEAD(&lgr->sndbufs[i]); in smc_lgr_create()
797 INIT_LIST_HEAD(&lgr->rmbs[i]); in smc_lgr_create()
799 lgr->next_link_id = 0; in smc_lgr_create()
801 memcpy(&lgr->id, (u8 *)&smc_lgr_list.num, SMC_LGR_ID_SIZE); in smc_lgr_create()
802 INIT_DELAYED_WORK(&lgr->free_work, smc_lgr_free_work); in smc_lgr_create()
803 INIT_WORK(&lgr->terminate_work, smc_lgr_terminate_work); in smc_lgr_create()
804 lgr->conns_all = RB_ROOT; in smc_lgr_create()
805 if (ini->is_smcd) { in smc_lgr_create()
806 /* SMC-D specific settings */ in smc_lgr_create()
807 get_device(&ini->ism_dev[ini->ism_selected]->dev); in smc_lgr_create()
808 lgr->peer_gid = ini->ism_peer_gid[ini->ism_selected]; in smc_lgr_create()
809 lgr->smcd = ini->ism_dev[ini->ism_selected]; in smc_lgr_create()
810 lgr_list = &ini->ism_dev[ini->ism_selected]->lgr_list; in smc_lgr_create()
811 lgr_lock = &lgr->smcd->lgr_lock; in smc_lgr_create()
812 lgr->smc_version = ini->smcd_version; in smc_lgr_create()
813 lgr->peer_shutdown = 0; in smc_lgr_create()
814 atomic_inc(&ini->ism_dev[ini->ism_selected]->lgr_cnt); in smc_lgr_create()
816 /* SMC-R specific settings */ in smc_lgr_create()
817 lgr->role = smc->listen_smc ? SMC_SERV : SMC_CLNT; in smc_lgr_create()
818 memcpy(lgr->peer_systemid, ini->ib_lcl->id_for_peer, in smc_lgr_create()
820 memcpy(lgr->pnet_id, ini->ib_dev->pnetid[ini->ib_port - 1], in smc_lgr_create()
822 smc_llc_lgr_init(lgr, smc); in smc_lgr_create()
825 lnk = &lgr->lnk[link_idx]; in smc_lgr_create()
833 smc->conn.lgr = lgr; in smc_lgr_create()
835 list_add_tail(&lgr->list, lgr_list); in smc_lgr_create()
840 destroy_workqueue(lgr->tx_wq); in smc_lgr_create()
844 if (ini->is_smcd && ini->vlan_id) in smc_lgr_create()
845 smc_ism_put_vlan(ini->ism_dev[ini->ism_selected], ini->vlan_id); in smc_lgr_create()
848 if (rc == -ENOMEM) in smc_lgr_create()
858 int buffer_len = conn->peer_rmbe_size; in smc_write_space()
863 smc_curs_copy(&prod, &conn->local_tx_ctrl.prod, conn); in smc_write_space()
864 smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn); in smc_write_space()
866 space = buffer_len - smc_curs_diff(buffer_len, &cons, &prod); in smc_write_space()
870 static int smc_switch_cursor(struct smc_sock *smc, struct smc_cdc_tx_pend *pend, in smc_switch_cursor() argument
873 struct smc_connection *conn = &smc->conn; in smc_switch_cursor()
878 smc_curs_copy(&conn->tx_curs_sent, &conn->tx_curs_fin, conn); in smc_switch_cursor()
879 smc_curs_copy(&fin, &conn->local_tx_ctrl_fin, conn); in smc_switch_cursor()
881 smc_curs_copy(&conn->local_tx_ctrl.prod, &fin, conn); in smc_switch_cursor()
882 smc_curs_copy(&cons, &conn->local_rx_ctrl.cons, conn); in smc_switch_cursor()
884 if (smc_curs_comp(conn->peer_rmbe_size, &cons, &fin) < 0) { in smc_switch_cursor()
888 diff = smc_curs_diff(conn->peer_rmbe_size, &fin, &cons); in smc_switch_cursor()
889 smc_curs_add(conn->sndbuf_desc->len, in smc_switch_cursor()
890 &conn->tx_curs_sent, diff); in smc_switch_cursor()
891 smc_curs_add(conn->sndbuf_desc->len, in smc_switch_cursor()
892 &conn->tx_curs_fin, diff); in smc_switch_cursor()
895 atomic_add(diff, &conn->sndbuf_space); in smc_switch_cursor()
898 smc_curs_add(conn->peer_rmbe_size, in smc_switch_cursor()
899 &conn->local_tx_ctrl.prod, diff); in smc_switch_cursor()
900 smc_curs_add(conn->peer_rmbe_size, in smc_switch_cursor()
901 &conn->local_tx_ctrl_fin, diff); in smc_switch_cursor()
904 atomic_set(&smc->conn.peer_rmbe_space, smc_write_space(conn)); in smc_switch_cursor()
906 if (smc->sk.sk_state != SMC_INIT && in smc_switch_cursor()
907 smc->sk.sk_state != SMC_CLOSED) { in smc_switch_cursor()
910 queue_delayed_work(conn->lgr->tx_wq, &conn->tx_work, 0); in smc_switch_cursor()
911 smc->sk.sk_data_ready(&smc->sk); in smc_switch_cursor()
914 smc_wr_tx_put_slot(conn->lnk, in smc_switch_cursor()
923 atomic_dec(&conn->lnk->conn_cnt); in smc_switch_link_and_count()
924 conn->lnk = to_lnk; in smc_switch_link_and_count()
925 atomic_inc(&conn->lnk->conn_cnt); in smc_switch_link_and_count()
935 struct smc_sock *smc; in smc_switch_conns() local
943 if (!smc_link_active(&lgr->lnk[i]) || i == from_lnk->link_idx) in smc_switch_conns()
945 if (is_dev_err && from_lnk->smcibdev == lgr->lnk[i].smcibdev && in smc_switch_conns()
946 from_lnk->ibport == lgr->lnk[i].ibport) { in smc_switch_conns()
949 to_lnk = &lgr->lnk[i]; in smc_switch_conns()
957 read_lock_bh(&lgr->conns_lock); in smc_switch_conns()
958 for (node = rb_first(&lgr->conns_all); node; node = rb_next(node)) { in smc_switch_conns()
960 if (conn->lnk != from_lnk) in smc_switch_conns()
962 smc = container_of(conn, struct smc_sock, conn); in smc_switch_conns()
963 /* conn->lnk not yet set in SMC_INIT state */ in smc_switch_conns()
964 if (smc->sk.sk_state == SMC_INIT) in smc_switch_conns()
966 if (smc->sk.sk_state == SMC_CLOSED || in smc_switch_conns()
967 smc->sk.sk_state == SMC_PEERCLOSEWAIT1 || in smc_switch_conns()
968 smc->sk.sk_state == SMC_PEERCLOSEWAIT2 || in smc_switch_conns()
969 smc->sk.sk_state == SMC_APPFINCLOSEWAIT || in smc_switch_conns()
970 smc->sk.sk_state == SMC_APPCLOSEWAIT1 || in smc_switch_conns()
971 smc->sk.sk_state == SMC_APPCLOSEWAIT2 || in smc_switch_conns()
972 smc->sk.sk_state == SMC_PEERFINCLOSEWAIT || in smc_switch_conns()
973 smc->sk.sk_state == SMC_PEERABORTWAIT || in smc_switch_conns()
974 smc->sk.sk_state == SMC_PROCESSABORT) { in smc_switch_conns()
975 spin_lock_bh(&conn->send_lock); in smc_switch_conns()
977 spin_unlock_bh(&conn->send_lock); in smc_switch_conns()
980 sock_hold(&smc->sk); in smc_switch_conns()
981 read_unlock_bh(&lgr->conns_lock); in smc_switch_conns()
982 /* pre-fetch buffer outside of send_lock, might sleep */ in smc_switch_conns()
987 spin_lock_bh(&conn->send_lock); in smc_switch_conns()
989 rc = smc_switch_cursor(smc, pend, wr_buf); in smc_switch_conns()
990 spin_unlock_bh(&conn->send_lock); in smc_switch_conns()
991 sock_put(&smc->sk); in smc_switch_conns()
996 read_unlock_bh(&lgr->conns_lock); in smc_switch_conns()
1011 if (rmb_desc->is_conf_rkey && !list_empty(&lgr->list)) { in smcr_buf_unuse()
1016 mutex_lock(&lgr->llc_conf_mutex); in smcr_buf_unuse()
1018 rmb_desc->is_conf_rkey = false; in smcr_buf_unuse()
1019 mutex_unlock(&lgr->llc_conf_mutex); in smcr_buf_unuse()
1020 smc_llc_flow_stop(lgr, &lgr->llc_flow_lcl); in smcr_buf_unuse()
1024 if (rmb_desc->is_reg_err) { in smcr_buf_unuse()
1026 mutex_lock(&lgr->rmbs_lock); in smcr_buf_unuse()
1027 list_del(&rmb_desc->list); in smcr_buf_unuse()
1028 mutex_unlock(&lgr->rmbs_lock); in smcr_buf_unuse()
1032 rmb_desc->used = 0; in smcr_buf_unuse()
1039 if (conn->sndbuf_desc) in smc_buf_unuse()
1040 conn->sndbuf_desc->used = 0; in smc_buf_unuse()
1041 if (conn->rmb_desc && lgr->is_smcd) in smc_buf_unuse()
1042 conn->rmb_desc->used = 0; in smc_buf_unuse()
1043 else if (conn->rmb_desc) in smc_buf_unuse()
1044 smcr_buf_unuse(conn->rmb_desc, lgr); in smc_buf_unuse()
1050 struct smc_link_group *lgr = conn->lgr; in smc_conn_free()
1054 if (lgr->is_smcd) { in smc_conn_free()
1055 if (!list_empty(&lgr->list)) in smc_conn_free()
1057 tasklet_kill(&conn->rx_tsklet); in smc_conn_free()
1060 if (current_work() != &conn->abort_work) in smc_conn_free()
1061 cancel_work_sync(&conn->abort_work); in smc_conn_free()
1063 if (!list_empty(&lgr->list)) { in smc_conn_free()
1068 if (!lgr->conns_num) in smc_conn_free()
1077 buf_desc->is_reg_mr[lnk->link_idx] = false; in smcr_buf_unmap_link()
1078 if (!buf_desc->is_map_ib[lnk->link_idx]) in smcr_buf_unmap_link()
1081 if (buf_desc->mr_rx[lnk->link_idx]) { in smcr_buf_unmap_link()
1083 buf_desc->mr_rx[lnk->link_idx]); in smcr_buf_unmap_link()
1084 buf_desc->mr_rx[lnk->link_idx] = NULL; in smcr_buf_unmap_link()
1090 sg_free_table(&buf_desc->sgt[lnk->link_idx]); in smcr_buf_unmap_link()
1091 buf_desc->is_map_ib[lnk->link_idx] = false; in smcr_buf_unmap_link()
1097 struct smc_link_group *lgr = lnk->lgr; in smcr_buf_unmap_lgr()
1102 mutex_lock(&lgr->rmbs_lock); in smcr_buf_unmap_lgr()
1103 list_for_each_entry_safe(buf_desc, bf, &lgr->rmbs[i], list) in smcr_buf_unmap_lgr()
1105 mutex_unlock(&lgr->rmbs_lock); in smcr_buf_unmap_lgr()
1106 mutex_lock(&lgr->sndbufs_lock); in smcr_buf_unmap_lgr()
1107 list_for_each_entry_safe(buf_desc, bf, &lgr->sndbufs[i], in smcr_buf_unmap_lgr()
1110 mutex_unlock(&lgr->sndbufs_lock); in smcr_buf_unmap_lgr()
1116 struct smc_link_group *lgr = lnk->lgr; in smcr_rtoken_clear_link()
1120 lgr->rtokens[i][lnk->link_idx].rkey = 0; in smcr_rtoken_clear_link()
1121 lgr->rtokens[i][lnk->link_idx].dma_addr = 0; in smcr_rtoken_clear_link()
1125 /* must be called under lgr->llc_conf_mutex lock */
1130 if (!lnk->lgr || lnk->state == SMC_LNK_UNUSED) in smcr_link_clear()
1132 lnk->peer_qpn = 0; in smcr_link_clear()
1142 put_device(&lnk->smcibdev->ibdev->dev); in smcr_link_clear()
1143 smcibdev = lnk->smcibdev; in smcr_link_clear()
1145 lnk->state = SMC_LNK_UNUSED; in smcr_link_clear()
1146 if (!atomic_dec_return(&smcibdev->lnk_cnt)) in smcr_link_clear()
1147 wake_up(&smcibdev->lnks_deleted); in smcr_link_clear()
1156 smcr_buf_unmap_link(buf_desc, is_rmb, &lgr->lnk[i]); in smcr_buf_free()
1158 if (buf_desc->pages) in smcr_buf_free()
1159 __free_pages(buf_desc->pages, buf_desc->order); in smcr_buf_free()
1168 buf_desc->len += sizeof(struct smcd_cdc_msg); in smcd_buf_free()
1169 smc_ism_unregister_dmb(lgr->smcd, buf_desc); in smcd_buf_free()
1171 kfree(buf_desc->cpu_addr); in smcd_buf_free()
1179 if (lgr->is_smcd) in smc_buf_free()
1193 buf_list = &lgr->rmbs[i]; in __smc_lgr_free_bufs()
1195 buf_list = &lgr->sndbufs[i]; in __smc_lgr_free_bufs()
1198 list_del(&buf_desc->list); in __smc_lgr_free_bufs()
1217 if (!lgr->is_smcd) { in smc_lgr_free()
1218 mutex_lock(&lgr->llc_conf_mutex); in smc_lgr_free()
1220 if (lgr->lnk[i].state != SMC_LNK_UNUSED) in smc_lgr_free()
1221 smcr_link_clear(&lgr->lnk[i], false); in smc_lgr_free()
1223 mutex_unlock(&lgr->llc_conf_mutex); in smc_lgr_free()
1228 destroy_workqueue(lgr->tx_wq); in smc_lgr_free()
1229 if (lgr->is_smcd) { in smc_lgr_free()
1230 smc_ism_put_vlan(lgr->smcd, lgr->vlan_id); in smc_lgr_free()
1231 put_device(&lgr->smcd->dev); in smc_lgr_free()
1232 if (!atomic_dec_return(&lgr->smcd->lgr_cnt)) in smc_lgr_free()
1233 wake_up(&lgr->smcd->lgrs_deleted); in smc_lgr_free()
1241 static void smc_sk_wake_ups(struct smc_sock *smc) in smc_sk_wake_ups() argument
1243 smc->sk.sk_write_space(&smc->sk); in smc_sk_wake_ups()
1244 smc->sk.sk_data_ready(&smc->sk); in smc_sk_wake_ups()
1245 smc->sk.sk_state_change(&smc->sk); in smc_sk_wake_ups()
1251 struct smc_sock *smc = container_of(conn, struct smc_sock, conn); in smc_conn_kill() local
1253 if (conn->lgr->is_smcd && conn->lgr->peer_shutdown) in smc_conn_kill()
1254 conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1; in smc_conn_kill()
1257 conn->killed = 1; in smc_conn_kill()
1258 smc->sk.sk_err = ECONNABORTED; in smc_conn_kill()
1259 smc_sk_wake_ups(smc); in smc_conn_kill()
1260 if (conn->lgr->is_smcd) { in smc_conn_kill()
1263 tasklet_kill(&conn->rx_tsklet); in smc_conn_kill()
1265 tasklet_unlock_wait(&conn->rx_tsklet); in smc_conn_kill()
1270 smc_close_active_abort(smc); in smc_conn_kill()
1275 if (lgr->is_smcd) { in smc_lgr_cleanup()
1278 u32 rsn = lgr->llc_termination_rsn; in smc_lgr_cleanup()
1294 struct smc_sock *smc; in __smc_lgr_terminate() local
1297 if (lgr->terminating) in __smc_lgr_terminate()
1299 /* cancel free_work sync, will terminate when lgr->freeing is set */ in __smc_lgr_terminate()
1300 cancel_delayed_work_sync(&lgr->free_work); in __smc_lgr_terminate()
1301 lgr->terminating = 1; in __smc_lgr_terminate()
1304 read_lock_bh(&lgr->conns_lock); in __smc_lgr_terminate()
1305 node = rb_first(&lgr->conns_all); in __smc_lgr_terminate()
1307 read_unlock_bh(&lgr->conns_lock); in __smc_lgr_terminate()
1309 smc = container_of(conn, struct smc_sock, conn); in __smc_lgr_terminate()
1310 sock_hold(&smc->sk); /* sock_put below */ in __smc_lgr_terminate()
1311 lock_sock(&smc->sk); in __smc_lgr_terminate()
1313 release_sock(&smc->sk); in __smc_lgr_terminate()
1314 sock_put(&smc->sk); /* sock_hold above */ in __smc_lgr_terminate()
1315 read_lock_bh(&lgr->conns_lock); in __smc_lgr_terminate()
1316 node = rb_first(&lgr->conns_all); in __smc_lgr_terminate()
1318 read_unlock_bh(&lgr->conns_lock); in __smc_lgr_terminate()
1330 if (list_empty(&lgr->list) || lgr->terminating || lgr->freeing) { in smc_lgr_terminate_sched()
1334 list_del_init(&lgr->list); in smc_lgr_terminate_sched()
1335 lgr->freeing = 1; in smc_lgr_terminate_sched()
1337 schedule_work(&lgr->terminate_work); in smc_lgr_terminate_sched()
1347 spin_lock_bh(&dev->lgr_lock); in smc_smcd_terminate()
1348 list_for_each_entry_safe(lgr, l, &dev->lgr_list, list) { in smc_smcd_terminate()
1349 if ((!peer_gid || lgr->peer_gid == peer_gid) && in smc_smcd_terminate()
1350 (vlan == VLAN_VID_MASK || lgr->vlan_id == vlan)) { in smc_smcd_terminate()
1352 lgr->peer_shutdown = 1; in smc_smcd_terminate()
1353 list_move(&lgr->list, &lgr_free_list); in smc_smcd_terminate()
1354 lgr->freeing = 1; in smc_smcd_terminate()
1357 spin_unlock_bh(&dev->lgr_lock); in smc_smcd_terminate()
1361 list_del_init(&lgr->list); in smc_smcd_terminate()
1362 schedule_work(&lgr->terminate_work); in smc_smcd_terminate()
1366 /* Called when an SMCD device is removed or the smc module is unloaded */
1372 spin_lock_bh(&smcd->lgr_lock); in smc_smcd_terminate_all()
1373 list_splice_init(&smcd->lgr_list, &lgr_free_list); in smc_smcd_terminate_all()
1375 lgr->freeing = 1; in smc_smcd_terminate_all()
1376 spin_unlock_bh(&smcd->lgr_lock); in smc_smcd_terminate_all()
1379 list_del_init(&lgr->list); in smc_smcd_terminate_all()
1383 if (atomic_read(&smcd->lgr_cnt)) in smc_smcd_terminate_all()
1384 wait_event(smcd->lgrs_deleted, !atomic_read(&smcd->lgr_cnt)); in smc_smcd_terminate_all()
1387 /* Called when an SMCR device is removed or the smc module is unloaded.
1401 lgr->freeing = 1; in smc_smcr_terminate_all()
1405 if (lgr->lnk[i].smcibdev == smcibdev) in smc_smcr_terminate_all()
1406 smcr_link_down_cond_sched(&lgr->lnk[i]); in smc_smcr_terminate_all()
1413 list_del_init(&lgr->list); in smc_smcr_terminate_all()
1419 if (atomic_read(&smcibdev->lnk_cnt)) in smc_smcr_terminate_all()
1420 wait_event(smcibdev->lnks_deleted, in smc_smcr_terminate_all()
1421 !atomic_read(&smcibdev->lnk_cnt)); in smc_smcr_terminate_all()
1435 if (smc_link_usable(&lgr->lnk[i])) in smcr_lgr_set_type()
1436 lgr->lnk[i].link_is_asym = false; in smcr_lgr_set_type()
1437 if (lgr->type == new_type) in smcr_lgr_set_type()
1439 lgr->type = new_type; in smcr_lgr_set_type()
1441 switch (lgr->type) { in smcr_lgr_set_type()
1458 pr_warn_ratelimited("smc: SMC-R lg %*phN state changed: " in smcr_lgr_set_type()
1459 "%s, pnetid %.16s\n", SMC_LGR_ID_SIZE, &lgr->id, in smcr_lgr_set_type()
1460 lgr_type, lgr->pnet_id); in smcr_lgr_set_type()
1468 lgr->lnk[asym_lnk_idx].link_is_asym = true; in smcr_lgr_set_type_asym()
1477 struct smc_sock *smc = container_of(conn, struct smc_sock, conn); in smc_conn_abort_work() local
1479 lock_sock(&smc->sk); in smc_conn_abort_work()
1481 release_sock(&smc->sk); in smc_conn_abort_work()
1482 sock_put(&smc->sk); /* sock_hold done by schedulers of abort_work */ in smc_conn_abort_work()
1492 if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id, in smcr_port_add()
1494 lgr->type == SMC_LGR_SYMMETRIC || in smcr_port_add()
1495 lgr->type == SMC_LGR_ASYMMETRIC_PEER) in smcr_port_add()
1505 /* link is down - switch connections to alternate link,
1506 * must be called under lgr->llc_conf_mutex lock
1510 struct smc_link_group *lgr = lnk->lgr; in smcr_link_down()
1514 if (!lgr || lnk->state == SMC_LNK_UNUSED || list_empty(&lgr->list)) in smcr_link_down()
1524 del_link_id = lnk->link_id; in smcr_link_down()
1526 if (lgr->role == SMC_SERV) { in smcr_link_down()
1530 if (lgr->llc_flow_lcl.type != SMC_LLC_FLOW_NONE) { in smcr_link_down()
1532 mutex_unlock(&lgr->llc_conf_mutex); in smcr_link_down()
1533 wait_event_timeout(lgr->llc_flow_waiter, in smcr_link_down()
1534 (list_empty(&lgr->list) || in smcr_link_down()
1535 lgr->llc_flow_lcl.type == SMC_LLC_FLOW_NONE), in smcr_link_down()
1537 mutex_lock(&lgr->llc_conf_mutex); in smcr_link_down()
1539 if (!list_empty(&lgr->list)) { in smcr_link_down()
1545 wake_up(&lgr->llc_flow_waiter); /* wake up next waiter */ in smcr_link_down()
1549 /* must be called under lgr->llc_conf_mutex lock */
1552 if (smc_link_downing(&lnk->state)) in smcr_link_down_cond()
1556 /* will get the lgr->llc_conf_mutex lock */
1559 if (smc_link_downing(&lnk->state)) in smcr_link_down_cond_sched()
1560 schedule_work(&lnk->link_down_wrk); in smcr_link_down_cond_sched()
1569 if (strncmp(smcibdev->pnetid[ibport - 1], lgr->pnet_id, in smcr_port_err()
1572 if (list_empty(&lgr->list)) in smcr_port_err()
1575 struct smc_link *lnk = &lgr->lnk[i]; in smcr_port_err()
1578 lnk->smcibdev == smcibdev && lnk->ibport == ibport) in smcr_port_err()
1588 struct smc_link_group *lgr = link->lgr; in smc_link_down_work()
1590 if (list_empty(&lgr->list)) in smc_link_down_work()
1592 wake_up_all(&lgr->llc_msg_waiter); in smc_link_down_work()
1593 mutex_lock(&lgr->llc_conf_mutex); in smc_link_down_work()
1595 mutex_unlock(&lgr->llc_conf_mutex); in smc_link_down_work()
1599 * @vlan_id: address to store the determined vlan id into
1603 struct dst_entry *dst = sk_dst_get(clcsock->sk); in smc_vlan_by_tcpsk()
1607 ini->vlan_id = 0; in smc_vlan_by_tcpsk()
1609 rc = -ENOTCONN; in smc_vlan_by_tcpsk()
1612 if (!dst->dev) { in smc_vlan_by_tcpsk()
1613 rc = -ENODEV; in smc_vlan_by_tcpsk()
1617 ndev = dst->dev; in smc_vlan_by_tcpsk()
1619 ini->vlan_id = vlan_dev_vlan_id(ndev); in smc_vlan_by_tcpsk()
1624 nest_lvl = ndev->lower_level; in smc_vlan_by_tcpsk()
1626 struct list_head *lower = &ndev->adj_list.lower; in smc_vlan_by_tcpsk()
1630 lower = lower->next; in smc_vlan_by_tcpsk()
1633 ini->vlan_id = vlan_dev_vlan_id(ndev); in smc_vlan_by_tcpsk()
1651 if (memcmp(lgr->peer_systemid, lcl->id_for_peer, SMC_SYSTEMID_LEN) || in smcr_lgr_match()
1652 lgr->role != role) in smcr_lgr_match()
1656 if (!smc_link_active(&lgr->lnk[i])) in smcr_lgr_match()
1658 if ((lgr->role == SMC_SERV || lgr->lnk[i].peer_qpn == clcqpn) && in smcr_lgr_match()
1659 !memcmp(lgr->lnk[i].peer_gid, &lcl->gid, SMC_GID_SIZE) && in smcr_lgr_match()
1660 !memcmp(lgr->lnk[i].peer_mac, lcl->mac, sizeof(lcl->mac))) in smcr_lgr_match()
1669 return lgr->peer_gid == peer_gid && lgr->smcd == smcismdev; in smcd_lgr_match()
1672 /* create a new SMC connection (and a new link group if necessary) */
1673 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini) in smc_conn_create() argument
1675 struct smc_connection *conn = &smc->conn; in smc_conn_create()
1682 lgr_list = ini->is_smcd ? &ini->ism_dev[ini->ism_selected]->lgr_list : in smc_conn_create()
1684 lgr_lock = ini->is_smcd ? &ini->ism_dev[ini->ism_selected]->lgr_lock : in smc_conn_create()
1686 ini->first_contact_local = 1; in smc_conn_create()
1687 role = smc->listen_smc ? SMC_SERV : SMC_CLNT; in smc_conn_create()
1688 if (role == SMC_CLNT && ini->first_contact_peer) in smc_conn_create()
1695 write_lock_bh(&lgr->conns_lock); in smc_conn_create()
1696 if ((ini->is_smcd ? in smc_conn_create()
1697 smcd_lgr_match(lgr, ini->ism_dev[ini->ism_selected], in smc_conn_create()
1698 ini->ism_peer_gid[ini->ism_selected]) : in smc_conn_create()
1699 smcr_lgr_match(lgr, ini->ib_lcl, role, ini->ib_clcqpn)) && in smc_conn_create()
1700 !lgr->sync_err && in smc_conn_create()
1701 (ini->smcd_version == SMC_V2 || in smc_conn_create()
1702 lgr->vlan_id == ini->vlan_id) && in smc_conn_create()
1703 (role == SMC_CLNT || ini->is_smcd || in smc_conn_create()
1704 lgr->conns_num < SMC_RMBS_PER_LGR_MAX)) { in smc_conn_create()
1706 ini->first_contact_local = 0; in smc_conn_create()
1707 conn->lgr = lgr; in smc_conn_create()
1709 write_unlock_bh(&lgr->conns_lock); in smc_conn_create()
1710 if (!rc && delayed_work_pending(&lgr->free_work)) in smc_conn_create()
1711 cancel_delayed_work(&lgr->free_work); in smc_conn_create()
1714 write_unlock_bh(&lgr->conns_lock); in smc_conn_create()
1720 if (role == SMC_CLNT && !ini->first_contact_peer && in smc_conn_create()
1721 ini->first_contact_local) { in smc_conn_create()
1730 if (ini->first_contact_local) { in smc_conn_create()
1731 rc = smc_lgr_create(smc, ini); in smc_conn_create()
1734 lgr = conn->lgr; in smc_conn_create()
1735 write_lock_bh(&lgr->conns_lock); in smc_conn_create()
1737 write_unlock_bh(&lgr->conns_lock); in smc_conn_create()
1741 conn->local_tx_ctrl.common.type = SMC_CDC_MSG_TYPE; in smc_conn_create()
1742 conn->local_tx_ctrl.len = SMC_WR_TX_SIZE; in smc_conn_create()
1743 conn->urg_state = SMC_URG_READ; in smc_conn_create()
1744 INIT_WORK(&smc->conn.abort_work, smc_conn_abort_work); in smc_conn_create()
1745 if (ini->is_smcd) { in smc_conn_create()
1746 conn->rx_off = sizeof(struct smcd_cdc_msg); in smc_conn_create()
1749 conn->rx_off = 0; in smc_conn_create()
1752 spin_lock_init(&conn->acurs_lock); in smc_conn_create()
1759 #define SMCD_DMBE_SIZES 6 /* 0 -> 16KB, 1 -> 32KB, .. 6 -> 1MB */
1760 #define SMCR_RMBE_SIZES 5 /* 0 -> 16KB, 1 -> 32KB, .. 5 -> 512KB */
1775 size = (size - 1) >> 14; /* convert to 16K multiple */ in smc_compress_bufsize()
1806 if (cmpxchg(&buf_slot->used, 0, 1) == 0) { in smc_buf_get_slot()
1830 if (buf_desc->is_map_ib[lnk->link_idx]) in smcr_buf_map_link()
1833 rc = sg_alloc_table(&buf_desc->sgt[lnk->link_idx], 1, GFP_KERNEL); in smcr_buf_map_link()
1836 sg_set_buf(buf_desc->sgt[lnk->link_idx].sgl, in smcr_buf_map_link()
1837 buf_desc->cpu_addr, buf_desc->len); in smcr_buf_map_link()
1842 /* SMC protocol depends on mapping to one DMA address only */ in smcr_buf_map_link()
1844 rc = -EAGAIN; in smcr_buf_map_link()
1850 rc = smc_ib_get_memory_region(lnk->roce_pd, in smcr_buf_map_link()
1853 buf_desc, lnk->link_idx); in smcr_buf_map_link()
1858 buf_desc->is_map_ib[lnk->link_idx] = true; in smcr_buf_map_link()
1865 sg_free_table(&buf_desc->sgt[lnk->link_idx]); in smcr_buf_map_link()
1870 * must be called under lgr->llc_conf_mutex lock
1874 if (list_empty(&link->lgr->list)) in smcr_link_reg_rmb()
1875 return -ENOLINK; in smcr_link_reg_rmb()
1876 if (!rmb_desc->is_reg_mr[link->link_idx]) { in smcr_link_reg_rmb()
1878 if (smc_wr_reg_send(link, rmb_desc->mr_rx[link->link_idx])) { in smcr_link_reg_rmb()
1879 rmb_desc->is_reg_err = true; in smcr_link_reg_rmb()
1880 return -EFAULT; in smcr_link_reg_rmb()
1882 rmb_desc->is_reg_mr[link->link_idx] = true; in smcr_link_reg_rmb()
1895 if (!buf_desc->used) in _smcr_buf_map_lgr()
1909 struct smc_link_group *lgr = lnk->lgr; in smcr_buf_map_lgr()
1913 rc = _smcr_buf_map_lgr(lnk, &lgr->rmbs_lock, in smcr_buf_map_lgr()
1914 &lgr->rmbs[i], true); in smcr_buf_map_lgr()
1917 rc = _smcr_buf_map_lgr(lnk, &lgr->sndbufs_lock, in smcr_buf_map_lgr()
1918 &lgr->sndbufs[i], false); in smcr_buf_map_lgr()
1926 * must be called under lgr->llc_conf_mutex lock
1930 struct smc_link_group *lgr = lnk->lgr; in smcr_buf_reg_lgr()
1934 mutex_lock(&lgr->rmbs_lock); in smcr_buf_reg_lgr()
1936 list_for_each_entry_safe(buf_desc, bf, &lgr->rmbs[i], list) { in smcr_buf_reg_lgr()
1937 if (!buf_desc->used) in smcr_buf_reg_lgr()
1945 mutex_unlock(&lgr->rmbs_lock); in smcr_buf_reg_lgr()
1957 return ERR_PTR(-ENOMEM); in smcr_new_buf_create()
1959 buf_desc->order = get_order(bufsize); in smcr_new_buf_create()
1960 buf_desc->pages = alloc_pages(GFP_KERNEL | __GFP_NOWARN | in smcr_new_buf_create()
1963 buf_desc->order); in smcr_new_buf_create()
1964 if (!buf_desc->pages) { in smcr_new_buf_create()
1966 return ERR_PTR(-EAGAIN); in smcr_new_buf_create()
1968 buf_desc->cpu_addr = (void *)page_address(buf_desc->pages); in smcr_new_buf_create()
1969 buf_desc->len = bufsize; in smcr_new_buf_create()
1982 mutex_lock(&lgr->llc_conf_mutex); in smcr_buf_map_usable_links()
1984 struct smc_link *lnk = &lgr->lnk[i]; in smcr_buf_map_usable_links()
1989 rc = -ENOMEM; in smcr_buf_map_usable_links()
1994 mutex_unlock(&lgr->llc_conf_mutex); in smcr_buf_map_usable_links()
2007 return ERR_PTR(-ENOMEM); in smcd_new_buf_create()
2012 if (rc == -ENOMEM) in smcd_new_buf_create()
2013 return ERR_PTR(-EAGAIN); in smcd_new_buf_create()
2014 if (rc == -ENOSPC) in smcd_new_buf_create()
2015 return ERR_PTR(-ENOSPC); in smcd_new_buf_create()
2016 return ERR_PTR(-EIO); in smcd_new_buf_create()
2018 buf_desc->pages = virt_to_page(buf_desc->cpu_addr); in smcd_new_buf_create()
2020 buf_desc->len = bufsize - sizeof(struct smcd_cdc_msg); in smcd_new_buf_create()
2022 buf_desc->cpu_addr = kzalloc(bufsize, GFP_KERNEL | in smcd_new_buf_create()
2025 if (!buf_desc->cpu_addr) { in smcd_new_buf_create()
2027 return ERR_PTR(-EAGAIN); in smcd_new_buf_create()
2029 buf_desc->len = bufsize; in smcd_new_buf_create()
2034 static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb) in __smc_buf_create() argument
2036 struct smc_buf_desc *buf_desc = ERR_PTR(-ENOMEM); in __smc_buf_create()
2037 struct smc_connection *conn = &smc->conn; in __smc_buf_create()
2038 struct smc_link_group *lgr = conn->lgr; in __smc_buf_create()
2047 sk_buf_size = smc->sk.sk_rcvbuf / 2; in __smc_buf_create()
2050 sk_buf_size = smc->sk.sk_sndbuf / 2; in __smc_buf_create()
2053 bufsize_short >= 0; bufsize_short--) { in __smc_buf_create()
2055 lock = &lgr->rmbs_lock; in __smc_buf_create()
2056 buf_list = &lgr->rmbs[bufsize_short]; in __smc_buf_create()
2058 lock = &lgr->sndbufs_lock; in __smc_buf_create()
2059 buf_list = &lgr->sndbufs[bufsize_short]; in __smc_buf_create()
2066 SMC_STAT_RMB_SIZE(smc, is_smcd, is_rmb, bufsize); in __smc_buf_create()
2067 SMC_STAT_BUF_REUSE(smc, is_smcd, is_rmb); in __smc_buf_create()
2068 memset(buf_desc->cpu_addr, 0, bufsize); in __smc_buf_create()
2077 if (PTR_ERR(buf_desc) == -ENOMEM) in __smc_buf_create()
2082 SMC_STAT_RMB_DOWNGRADED(smc, is_smcd, is_rmb); in __smc_buf_create()
2087 SMC_STAT_RMB_ALLOC(smc, is_smcd, is_rmb); in __smc_buf_create()
2088 SMC_STAT_RMB_SIZE(smc, is_smcd, is_rmb, bufsize); in __smc_buf_create()
2089 buf_desc->used = 1; in __smc_buf_create()
2091 list_add(&buf_desc->list, buf_list); in __smc_buf_create()
2102 return -ENOMEM; in __smc_buf_create()
2107 conn->rmb_desc = buf_desc; in __smc_buf_create()
2108 conn->rmbe_size_short = bufsize_short; in __smc_buf_create()
2109 smc->sk.sk_rcvbuf = bufsize * 2; in __smc_buf_create()
2110 atomic_set(&conn->bytes_to_rcv, 0); in __smc_buf_create()
2111 conn->rmbe_update_limit = in __smc_buf_create()
2112 smc_rmb_wnd_update_limit(buf_desc->len); in __smc_buf_create()
2116 conn->sndbuf_desc = buf_desc; in __smc_buf_create()
2117 smc->sk.sk_sndbuf = bufsize * 2; in __smc_buf_create()
2118 atomic_set(&conn->sndbuf_space, bufsize); in __smc_buf_create()
2125 if (!conn->lgr || conn->lgr->is_smcd || !smc_link_active(conn->lnk)) in smc_sndbuf_sync_sg_for_cpu()
2127 smc_ib_sync_sg_for_cpu(conn->lnk, conn->sndbuf_desc, DMA_TO_DEVICE); in smc_sndbuf_sync_sg_for_cpu()
2132 if (!conn->lgr || conn->lgr->is_smcd || !smc_link_active(conn->lnk)) in smc_sndbuf_sync_sg_for_device()
2134 smc_ib_sync_sg_for_device(conn->lnk, conn->sndbuf_desc, DMA_TO_DEVICE); in smc_sndbuf_sync_sg_for_device()
2141 if (!conn->lgr || conn->lgr->is_smcd) in smc_rmb_sync_sg_for_cpu()
2144 if (!smc_link_active(&conn->lgr->lnk[i])) in smc_rmb_sync_sg_for_cpu()
2146 smc_ib_sync_sg_for_cpu(&conn->lgr->lnk[i], conn->rmb_desc, in smc_rmb_sync_sg_for_cpu()
2155 if (!conn->lgr || conn->lgr->is_smcd) in smc_rmb_sync_sg_for_device()
2158 if (!smc_link_active(&conn->lgr->lnk[i])) in smc_rmb_sync_sg_for_device()
2160 smc_ib_sync_sg_for_device(&conn->lgr->lnk[i], conn->rmb_desc, in smc_rmb_sync_sg_for_device()
2165 /* create the send and receive buffer for an SMC socket;
2167 * (even though the SMC protocol allows more than one RMB-element per RMB,
2168 * the Linux implementation uses just one RMB-element per RMB, i.e. uses an
2171 int smc_buf_create(struct smc_sock *smc, bool is_smcd) in smc_buf_create() argument
2176 rc = __smc_buf_create(smc, is_smcd, false); in smc_buf_create()
2180 rc = __smc_buf_create(smc, is_smcd, true); in smc_buf_create()
2182 mutex_lock(&smc->conn.lgr->sndbufs_lock); in smc_buf_create()
2183 list_del(&smc->conn.sndbuf_desc->list); in smc_buf_create()
2184 mutex_unlock(&smc->conn.lgr->sndbufs_lock); in smc_buf_create()
2185 smc_buf_free(smc->conn.lgr, false, smc->conn.sndbuf_desc); in smc_buf_create()
2186 smc->conn.sndbuf_desc = NULL; in smc_buf_create()
2195 for_each_clear_bit(i, lgr->rtokens_used_mask, SMC_RMBS_PER_LGR_MAX) { in smc_rmb_reserve_rtoken_idx()
2196 if (!test_and_set_bit(i, lgr->rtokens_used_mask)) in smc_rmb_reserve_rtoken_idx()
2199 return -ENOSPC; in smc_rmb_reserve_rtoken_idx()
2208 if (test_bit(i, lgr->rtokens_used_mask) && in smc_rtoken_find_by_link()
2209 lgr->rtokens[i][lnk_idx].rkey == rkey) in smc_rtoken_find_by_link()
2212 return -ENOENT; in smc_rtoken_find_by_link()
2222 if (rtok_idx == -ENOENT) in smc_rtoken_set()
2224 lgr->rtokens[rtok_idx][link_idx_new].rkey = ntohl(nw_rkey); in smc_rtoken_set()
2225 lgr->rtokens[rtok_idx][link_idx_new].dma_addr = be64_to_cpu(nw_vaddr); in smc_rtoken_set()
2238 if (lgr->lnk[link_idx].link_id == link_id) { in smc_rtoken_set2()
2245 lgr->rtokens[rtok_idx][link_idx].rkey = rkey; in smc_rtoken_set2()
2246 lgr->rtokens[rtok_idx][link_idx].dma_addr = dma_addr; in smc_rtoken_set2()
2258 if (lgr->rtokens[i][lnk->link_idx].rkey == rkey && in smc_rtoken_add()
2259 lgr->rtokens[i][lnk->link_idx].dma_addr == dma_addr && in smc_rtoken_add()
2260 test_bit(i, lgr->rtokens_used_mask)) { in smc_rtoken_add()
2268 lgr->rtokens[i][lnk->link_idx].rkey = rkey; in smc_rtoken_add()
2269 lgr->rtokens[i][lnk->link_idx].dma_addr = dma_addr; in smc_rtoken_add()
2281 if (lgr->rtokens[i][lnk->link_idx].rkey == rkey && in smc_rtoken_delete()
2282 test_bit(i, lgr->rtokens_used_mask)) { in smc_rtoken_delete()
2284 lgr->rtokens[i][j].rkey = 0; in smc_rtoken_delete()
2285 lgr->rtokens[i][j].dma_addr = 0; in smc_rtoken_delete()
2287 clear_bit(i, lgr->rtokens_used_mask); in smc_rtoken_delete()
2291 return -ENOENT; in smc_rtoken_delete()
2299 conn->rtoken_idx = smc_rtoken_add(lnk, clc->r0.rmb_dma_addr, in smc_rmb_rtoken_handling()
2300 clc->r0.rmb_rkey); in smc_rmb_rtoken_handling()
2301 if (conn->rtoken_idx < 0) in smc_rmb_rtoken_handling()
2302 return conn->rtoken_idx; in smc_rmb_rtoken_handling()
2316 set_bit(i, smcibdev->ports_going_away); in smc_core_going_away()
2322 smcd->going_away = 1; in smc_core_going_away()
2327 /* Clean up all SMC link groups */