1a4cf0443SUrsula Braun /* 2a4cf0443SUrsula Braun * Shared Memory Communications over RDMA (SMC-R) and RoCE 3a4cf0443SUrsula Braun * 4a4cf0443SUrsula Braun * IB infrastructure: 5a4cf0443SUrsula Braun * Establish SMC-R as an Infiniband Client to be notified about added and 6a4cf0443SUrsula Braun * removed IB devices of type RDMA. 7a4cf0443SUrsula Braun * Determine device and port characteristics for these IB devices. 8a4cf0443SUrsula Braun * 9a4cf0443SUrsula Braun * Copyright IBM Corp. 2016 10a4cf0443SUrsula Braun * 11a4cf0443SUrsula Braun * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com> 12a4cf0443SUrsula Braun */ 13a4cf0443SUrsula Braun 14a4cf0443SUrsula Braun #include <linux/random.h> 15bd4ad577SUrsula Braun #include <linux/workqueue.h> 16a4cf0443SUrsula Braun #include <rdma/ib_verbs.h> 17a4cf0443SUrsula Braun 186812baabSThomas Richter #include "smc_pnet.h" 19a4cf0443SUrsula Braun #include "smc_ib.h" 20cd6851f3SUrsula Braun #include "smc_core.h" 21f38ba179SUrsula Braun #include "smc_wr.h" 22a4cf0443SUrsula Braun #include "smc.h" 23a4cf0443SUrsula Braun 24bd4ad577SUrsula Braun #define SMC_QP_MIN_RNR_TIMER 5 25bd4ad577SUrsula Braun #define SMC_QP_TIMEOUT 15 /* 4096 * 2 ** timeout usec */ 26bd4ad577SUrsula Braun #define SMC_QP_RETRY_CNT 7 /* 7: infinite */ 27bd4ad577SUrsula Braun #define SMC_QP_RNR_RETRY 7 /* 7: infinite */ 28bd4ad577SUrsula Braun 29a4cf0443SUrsula Braun struct smc_ib_devices smc_ib_devices = { /* smc-registered ib devices */ 30a4cf0443SUrsula Braun .lock = __SPIN_LOCK_UNLOCKED(smc_ib_devices.lock), 31a4cf0443SUrsula Braun .list = LIST_HEAD_INIT(smc_ib_devices.list), 32a4cf0443SUrsula Braun }; 33a4cf0443SUrsula Braun 34a4cf0443SUrsula Braun #define SMC_LOCAL_SYSTEMID_RESET "%%%%%%%" 35a4cf0443SUrsula Braun 36a4cf0443SUrsula Braun u8 local_systemid[SMC_SYSTEMID_LEN] = SMC_LOCAL_SYSTEMID_RESET; /* unique system 37a4cf0443SUrsula Braun * identifier 38a4cf0443SUrsula Braun */ 39a4cf0443SUrsula Braun 40bd4ad577SUrsula Braun int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags, 41bd4ad577SUrsula Braun struct ib_mr **mr) 42bd4ad577SUrsula Braun { 43bd4ad577SUrsula Braun int rc; 44bd4ad577SUrsula Braun 45bd4ad577SUrsula Braun if (*mr) 46bd4ad577SUrsula Braun return 0; /* already done */ 47bd4ad577SUrsula Braun 48bd4ad577SUrsula Braun /* obtain unique key - 49bd4ad577SUrsula Braun * next invocation of get_dma_mr returns a different key! 50bd4ad577SUrsula Braun */ 51bd4ad577SUrsula Braun *mr = pd->device->get_dma_mr(pd, access_flags); 52bd4ad577SUrsula Braun rc = PTR_ERR_OR_ZERO(*mr); 53bd4ad577SUrsula Braun if (IS_ERR(*mr)) 54bd4ad577SUrsula Braun *mr = NULL; 55bd4ad577SUrsula Braun return rc; 56bd4ad577SUrsula Braun } 57bd4ad577SUrsula Braun 58bd4ad577SUrsula Braun static int smc_ib_modify_qp_init(struct smc_link *lnk) 59bd4ad577SUrsula Braun { 60bd4ad577SUrsula Braun struct ib_qp_attr qp_attr; 61bd4ad577SUrsula Braun 62bd4ad577SUrsula Braun memset(&qp_attr, 0, sizeof(qp_attr)); 63bd4ad577SUrsula Braun qp_attr.qp_state = IB_QPS_INIT; 64bd4ad577SUrsula Braun qp_attr.pkey_index = 0; 65bd4ad577SUrsula Braun qp_attr.port_num = lnk->ibport; 66bd4ad577SUrsula Braun qp_attr.qp_access_flags = IB_ACCESS_LOCAL_WRITE 67bd4ad577SUrsula Braun | IB_ACCESS_REMOTE_WRITE; 68bd4ad577SUrsula Braun return ib_modify_qp(lnk->roce_qp, &qp_attr, 69bd4ad577SUrsula Braun IB_QP_STATE | IB_QP_PKEY_INDEX | 70bd4ad577SUrsula Braun IB_QP_ACCESS_FLAGS | IB_QP_PORT); 71bd4ad577SUrsula Braun } 72bd4ad577SUrsula Braun 73bd4ad577SUrsula Braun static int smc_ib_modify_qp_rtr(struct smc_link *lnk) 74bd4ad577SUrsula Braun { 75bd4ad577SUrsula Braun enum ib_qp_attr_mask qp_attr_mask = 76bd4ad577SUrsula Braun IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN | 77bd4ad577SUrsula Braun IB_QP_RQ_PSN | IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; 78bd4ad577SUrsula Braun struct ib_qp_attr qp_attr; 79bd4ad577SUrsula Braun 80bd4ad577SUrsula Braun memset(&qp_attr, 0, sizeof(qp_attr)); 81bd4ad577SUrsula Braun qp_attr.qp_state = IB_QPS_RTR; 82bd4ad577SUrsula Braun qp_attr.path_mtu = min(lnk->path_mtu, lnk->peer_mtu); 83d8966fcdSDasaratharaman Chandramouli rdma_ah_set_port_num(&qp_attr.ah_attr, lnk->ibport); 84d8966fcdSDasaratharaman Chandramouli rdma_ah_set_grh(&qp_attr.ah_attr, NULL, 0, 0, 1, 0); 85d8966fcdSDasaratharaman Chandramouli rdma_ah_set_dgid_raw(&qp_attr.ah_attr, lnk->peer_gid); 86bd4ad577SUrsula Braun memcpy(&qp_attr.ah_attr.dmac, lnk->peer_mac, 87bd4ad577SUrsula Braun sizeof(lnk->peer_mac)); 88bd4ad577SUrsula Braun qp_attr.dest_qp_num = lnk->peer_qpn; 89bd4ad577SUrsula Braun qp_attr.rq_psn = lnk->peer_psn; /* starting receive packet seq # */ 90bd4ad577SUrsula Braun qp_attr.max_dest_rd_atomic = 1; /* max # of resources for incoming 91bd4ad577SUrsula Braun * requests 92bd4ad577SUrsula Braun */ 93bd4ad577SUrsula Braun qp_attr.min_rnr_timer = SMC_QP_MIN_RNR_TIMER; 94bd4ad577SUrsula Braun 95bd4ad577SUrsula Braun return ib_modify_qp(lnk->roce_qp, &qp_attr, qp_attr_mask); 96bd4ad577SUrsula Braun } 97bd4ad577SUrsula Braun 98bd4ad577SUrsula Braun int smc_ib_modify_qp_rts(struct smc_link *lnk) 99bd4ad577SUrsula Braun { 100bd4ad577SUrsula Braun struct ib_qp_attr qp_attr; 101bd4ad577SUrsula Braun 102bd4ad577SUrsula Braun memset(&qp_attr, 0, sizeof(qp_attr)); 103bd4ad577SUrsula Braun qp_attr.qp_state = IB_QPS_RTS; 104bd4ad577SUrsula Braun qp_attr.timeout = SMC_QP_TIMEOUT; /* local ack timeout */ 105bd4ad577SUrsula Braun qp_attr.retry_cnt = SMC_QP_RETRY_CNT; /* retry count */ 106bd4ad577SUrsula Braun qp_attr.rnr_retry = SMC_QP_RNR_RETRY; /* RNR retries, 7=infinite */ 107bd4ad577SUrsula Braun qp_attr.sq_psn = lnk->psn_initial; /* starting send packet seq # */ 108bd4ad577SUrsula Braun qp_attr.max_rd_atomic = 1; /* # of outstanding RDMA reads and 109bd4ad577SUrsula Braun * atomic ops allowed 110bd4ad577SUrsula Braun */ 111bd4ad577SUrsula Braun return ib_modify_qp(lnk->roce_qp, &qp_attr, 112bd4ad577SUrsula Braun IB_QP_STATE | IB_QP_TIMEOUT | IB_QP_RETRY_CNT | 113bd4ad577SUrsula Braun IB_QP_SQ_PSN | IB_QP_RNR_RETRY | 114bd4ad577SUrsula Braun IB_QP_MAX_QP_RD_ATOMIC); 115bd4ad577SUrsula Braun } 116bd4ad577SUrsula Braun 117bd4ad577SUrsula Braun int smc_ib_modify_qp_reset(struct smc_link *lnk) 118bd4ad577SUrsula Braun { 119bd4ad577SUrsula Braun struct ib_qp_attr qp_attr; 120bd4ad577SUrsula Braun 121bd4ad577SUrsula Braun memset(&qp_attr, 0, sizeof(qp_attr)); 122bd4ad577SUrsula Braun qp_attr.qp_state = IB_QPS_RESET; 123bd4ad577SUrsula Braun return ib_modify_qp(lnk->roce_qp, &qp_attr, IB_QP_STATE); 124bd4ad577SUrsula Braun } 125bd4ad577SUrsula Braun 126bd4ad577SUrsula Braun int smc_ib_ready_link(struct smc_link *lnk) 127bd4ad577SUrsula Braun { 128bd4ad577SUrsula Braun struct smc_link_group *lgr = 129bd4ad577SUrsula Braun container_of(lnk, struct smc_link_group, lnk[0]); 130bd4ad577SUrsula Braun int rc = 0; 131bd4ad577SUrsula Braun 132bd4ad577SUrsula Braun rc = smc_ib_modify_qp_init(lnk); 133bd4ad577SUrsula Braun if (rc) 134bd4ad577SUrsula Braun goto out; 135bd4ad577SUrsula Braun 136bd4ad577SUrsula Braun rc = smc_ib_modify_qp_rtr(lnk); 137bd4ad577SUrsula Braun if (rc) 138bd4ad577SUrsula Braun goto out; 139bd4ad577SUrsula Braun smc_wr_remember_qp_attr(lnk); 140bd4ad577SUrsula Braun rc = ib_req_notify_cq(lnk->smcibdev->roce_cq_recv, 141bd4ad577SUrsula Braun IB_CQ_SOLICITED_MASK); 142bd4ad577SUrsula Braun if (rc) 143bd4ad577SUrsula Braun goto out; 144bd4ad577SUrsula Braun rc = smc_wr_rx_post_init(lnk); 145bd4ad577SUrsula Braun if (rc) 146bd4ad577SUrsula Braun goto out; 147bd4ad577SUrsula Braun smc_wr_remember_qp_attr(lnk); 148bd4ad577SUrsula Braun 149bd4ad577SUrsula Braun if (lgr->role == SMC_SERV) { 150bd4ad577SUrsula Braun rc = smc_ib_modify_qp_rts(lnk); 151bd4ad577SUrsula Braun if (rc) 152bd4ad577SUrsula Braun goto out; 153bd4ad577SUrsula Braun smc_wr_remember_qp_attr(lnk); 154bd4ad577SUrsula Braun } 155bd4ad577SUrsula Braun out: 156bd4ad577SUrsula Braun return rc; 157bd4ad577SUrsula Braun } 158bd4ad577SUrsula Braun 159bd4ad577SUrsula Braun /* process context wrapper for might_sleep smc_ib_remember_port_attr */ 160bd4ad577SUrsula Braun static void smc_ib_port_event_work(struct work_struct *work) 161bd4ad577SUrsula Braun { 162bd4ad577SUrsula Braun struct smc_ib_device *smcibdev = container_of( 163bd4ad577SUrsula Braun work, struct smc_ib_device, port_event_work); 164bd4ad577SUrsula Braun u8 port_idx; 165bd4ad577SUrsula Braun 166bd4ad577SUrsula Braun for_each_set_bit(port_idx, &smcibdev->port_event_mask, SMC_MAX_PORTS) { 167bd4ad577SUrsula Braun smc_ib_remember_port_attr(smcibdev, port_idx + 1); 168bd4ad577SUrsula Braun clear_bit(port_idx, &smcibdev->port_event_mask); 169bd4ad577SUrsula Braun } 170bd4ad577SUrsula Braun } 171bd4ad577SUrsula Braun 172bd4ad577SUrsula Braun /* can be called in IRQ context */ 173bd4ad577SUrsula Braun static void smc_ib_global_event_handler(struct ib_event_handler *handler, 174bd4ad577SUrsula Braun struct ib_event *ibevent) 175bd4ad577SUrsula Braun { 176bd4ad577SUrsula Braun struct smc_ib_device *smcibdev; 177bd4ad577SUrsula Braun u8 port_idx; 178bd4ad577SUrsula Braun 179bd4ad577SUrsula Braun smcibdev = container_of(handler, struct smc_ib_device, event_handler); 180bd4ad577SUrsula Braun 181bd4ad577SUrsula Braun switch (ibevent->event) { 182bd4ad577SUrsula Braun case IB_EVENT_PORT_ERR: 183bd4ad577SUrsula Braun port_idx = ibevent->element.port_num - 1; 184bd4ad577SUrsula Braun set_bit(port_idx, &smcibdev->port_event_mask); 185bd4ad577SUrsula Braun schedule_work(&smcibdev->port_event_work); 186bd4ad577SUrsula Braun /* fall through */ 187bd4ad577SUrsula Braun case IB_EVENT_DEVICE_FATAL: 188bd4ad577SUrsula Braun /* tbd in follow-on patch: 189bd4ad577SUrsula Braun * abnormal close of corresponding connections 190bd4ad577SUrsula Braun */ 191bd4ad577SUrsula Braun break; 192bd4ad577SUrsula Braun case IB_EVENT_PORT_ACTIVE: 193bd4ad577SUrsula Braun port_idx = ibevent->element.port_num - 1; 194bd4ad577SUrsula Braun set_bit(port_idx, &smcibdev->port_event_mask); 195bd4ad577SUrsula Braun schedule_work(&smcibdev->port_event_work); 196bd4ad577SUrsula Braun break; 197bd4ad577SUrsula Braun default: 198bd4ad577SUrsula Braun break; 199bd4ad577SUrsula Braun } 200bd4ad577SUrsula Braun } 201bd4ad577SUrsula Braun 202f38ba179SUrsula Braun void smc_ib_dealloc_protection_domain(struct smc_link *lnk) 203f38ba179SUrsula Braun { 204f38ba179SUrsula Braun ib_dealloc_pd(lnk->roce_pd); 205f38ba179SUrsula Braun lnk->roce_pd = NULL; 206f38ba179SUrsula Braun } 207f38ba179SUrsula Braun 208f38ba179SUrsula Braun int smc_ib_create_protection_domain(struct smc_link *lnk) 209f38ba179SUrsula Braun { 210f38ba179SUrsula Braun int rc; 211f38ba179SUrsula Braun 212f38ba179SUrsula Braun lnk->roce_pd = ib_alloc_pd(lnk->smcibdev->ibdev, 0); 213f38ba179SUrsula Braun rc = PTR_ERR_OR_ZERO(lnk->roce_pd); 214f38ba179SUrsula Braun if (IS_ERR(lnk->roce_pd)) 215f38ba179SUrsula Braun lnk->roce_pd = NULL; 216f38ba179SUrsula Braun return rc; 217f38ba179SUrsula Braun } 218f38ba179SUrsula Braun 219f38ba179SUrsula Braun static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv) 220f38ba179SUrsula Braun { 221f38ba179SUrsula Braun switch (ibevent->event) { 222f38ba179SUrsula Braun case IB_EVENT_DEVICE_FATAL: 223f38ba179SUrsula Braun case IB_EVENT_GID_CHANGE: 224f38ba179SUrsula Braun case IB_EVENT_PORT_ERR: 225f38ba179SUrsula Braun case IB_EVENT_QP_ACCESS_ERR: 226f38ba179SUrsula Braun /* tbd in follow-on patch: 227f38ba179SUrsula Braun * abnormal close of corresponding connections 228f38ba179SUrsula Braun */ 229f38ba179SUrsula Braun break; 230f38ba179SUrsula Braun default: 231f38ba179SUrsula Braun break; 232f38ba179SUrsula Braun } 233f38ba179SUrsula Braun } 234f38ba179SUrsula Braun 235f38ba179SUrsula Braun void smc_ib_destroy_queue_pair(struct smc_link *lnk) 236f38ba179SUrsula Braun { 237f38ba179SUrsula Braun ib_destroy_qp(lnk->roce_qp); 238f38ba179SUrsula Braun lnk->roce_qp = NULL; 239f38ba179SUrsula Braun } 240f38ba179SUrsula Braun 241f38ba179SUrsula Braun /* create a queue pair within the protection domain for a link */ 242f38ba179SUrsula Braun int smc_ib_create_queue_pair(struct smc_link *lnk) 243f38ba179SUrsula Braun { 244f38ba179SUrsula Braun struct ib_qp_init_attr qp_attr = { 245f38ba179SUrsula Braun .event_handler = smc_ib_qp_event_handler, 246f38ba179SUrsula Braun .qp_context = lnk, 247f38ba179SUrsula Braun .send_cq = lnk->smcibdev->roce_cq_send, 248f38ba179SUrsula Braun .recv_cq = lnk->smcibdev->roce_cq_recv, 249f38ba179SUrsula Braun .srq = NULL, 250f38ba179SUrsula Braun .cap = { 251f38ba179SUrsula Braun .max_send_wr = SMC_WR_BUF_CNT, 252f38ba179SUrsula Braun /* include unsolicited rdma_writes as well, 253f38ba179SUrsula Braun * there are max. 2 RDMA_WRITE per 1 WR_SEND 254f38ba179SUrsula Braun */ 255f38ba179SUrsula Braun .max_recv_wr = SMC_WR_BUF_CNT * 3, 256f38ba179SUrsula Braun .max_send_sge = SMC_IB_MAX_SEND_SGE, 257f38ba179SUrsula Braun .max_recv_sge = 1, 258f38ba179SUrsula Braun }, 259f38ba179SUrsula Braun .sq_sig_type = IB_SIGNAL_REQ_WR, 260f38ba179SUrsula Braun .qp_type = IB_QPT_RC, 261f38ba179SUrsula Braun }; 262f38ba179SUrsula Braun int rc; 263f38ba179SUrsula Braun 264f38ba179SUrsula Braun lnk->roce_qp = ib_create_qp(lnk->roce_pd, &qp_attr); 265f38ba179SUrsula Braun rc = PTR_ERR_OR_ZERO(lnk->roce_qp); 266f38ba179SUrsula Braun if (IS_ERR(lnk->roce_qp)) 267f38ba179SUrsula Braun lnk->roce_qp = NULL; 268f38ba179SUrsula Braun else 269f38ba179SUrsula Braun smc_wr_remember_qp_attr(lnk); 270f38ba179SUrsula Braun return rc; 271f38ba179SUrsula Braun } 272f38ba179SUrsula Braun 273cd6851f3SUrsula Braun /* map a new TX or RX buffer to DMA */ 274cd6851f3SUrsula Braun int smc_ib_buf_map(struct smc_ib_device *smcibdev, int buf_size, 275cd6851f3SUrsula Braun struct smc_buf_desc *buf_slot, 276cd6851f3SUrsula Braun enum dma_data_direction data_direction) 277cd6851f3SUrsula Braun { 278cd6851f3SUrsula Braun int rc = 0; 279cd6851f3SUrsula Braun 280cd6851f3SUrsula Braun if (buf_slot->dma_addr[SMC_SINGLE_LINK]) 281cd6851f3SUrsula Braun return rc; /* already mapped */ 282cd6851f3SUrsula Braun buf_slot->dma_addr[SMC_SINGLE_LINK] = 283cd6851f3SUrsula Braun ib_dma_map_single(smcibdev->ibdev, buf_slot->cpu_addr, 284cd6851f3SUrsula Braun buf_size, data_direction); 285cd6851f3SUrsula Braun if (ib_dma_mapping_error(smcibdev->ibdev, 286cd6851f3SUrsula Braun buf_slot->dma_addr[SMC_SINGLE_LINK])) 287cd6851f3SUrsula Braun rc = -EIO; 288cd6851f3SUrsula Braun return rc; 289cd6851f3SUrsula Braun } 290cd6851f3SUrsula Braun 291bd4ad577SUrsula Braun void smc_ib_buf_unmap(struct smc_ib_device *smcibdev, int buf_size, 292bd4ad577SUrsula Braun struct smc_buf_desc *buf_slot, 293bd4ad577SUrsula Braun enum dma_data_direction data_direction) 294bd4ad577SUrsula Braun { 295bd4ad577SUrsula Braun if (!buf_slot->dma_addr[SMC_SINGLE_LINK]) 296bd4ad577SUrsula Braun return; /* already unmapped */ 297bd4ad577SUrsula Braun ib_dma_unmap_single(smcibdev->ibdev, *buf_slot->dma_addr, buf_size, 298bd4ad577SUrsula Braun data_direction); 299bd4ad577SUrsula Braun buf_slot->dma_addr[SMC_SINGLE_LINK] = 0; 300bd4ad577SUrsula Braun } 301bd4ad577SUrsula Braun 302a4cf0443SUrsula Braun static int smc_ib_fill_gid_and_mac(struct smc_ib_device *smcibdev, u8 ibport) 303a4cf0443SUrsula Braun { 304a4cf0443SUrsula Braun struct net_device *ndev; 305a4cf0443SUrsula Braun int rc; 306a4cf0443SUrsula Braun 307a4cf0443SUrsula Braun rc = ib_query_gid(smcibdev->ibdev, ibport, 0, 308a4cf0443SUrsula Braun &smcibdev->gid[ibport - 1], NULL); 309a4cf0443SUrsula Braun /* the SMC protocol requires specification of the roce MAC address; 310a4cf0443SUrsula Braun * if net_device cannot be determined, it can be derived from gid 0 311a4cf0443SUrsula Braun */ 312a4cf0443SUrsula Braun ndev = smcibdev->ibdev->get_netdev(smcibdev->ibdev, ibport); 313a4cf0443SUrsula Braun if (ndev) { 314a4cf0443SUrsula Braun memcpy(&smcibdev->mac, ndev->dev_addr, ETH_ALEN); 315a4cf0443SUrsula Braun } else if (!rc) { 316a4cf0443SUrsula Braun memcpy(&smcibdev->mac[ibport - 1][0], 317a4cf0443SUrsula Braun &smcibdev->gid[ibport - 1].raw[8], 3); 318a4cf0443SUrsula Braun memcpy(&smcibdev->mac[ibport - 1][3], 319a4cf0443SUrsula Braun &smcibdev->gid[ibport - 1].raw[13], 3); 320a4cf0443SUrsula Braun smcibdev->mac[ibport - 1][0] &= ~0x02; 321a4cf0443SUrsula Braun } 322a4cf0443SUrsula Braun return rc; 323a4cf0443SUrsula Braun } 324a4cf0443SUrsula Braun 325a4cf0443SUrsula Braun /* Create an identifier unique for this instance of SMC-R. 326a4cf0443SUrsula Braun * The MAC-address of the first active registered IB device 327a4cf0443SUrsula Braun * plus a random 2-byte number is used to create this identifier. 328a4cf0443SUrsula Braun * This name is delivered to the peer during connection initialization. 329a4cf0443SUrsula Braun */ 330a4cf0443SUrsula Braun static inline void smc_ib_define_local_systemid(struct smc_ib_device *smcibdev, 331a4cf0443SUrsula Braun u8 ibport) 332a4cf0443SUrsula Braun { 333a4cf0443SUrsula Braun memcpy(&local_systemid[2], &smcibdev->mac[ibport - 1], 334a4cf0443SUrsula Braun sizeof(smcibdev->mac[ibport - 1])); 335a4cf0443SUrsula Braun get_random_bytes(&local_systemid[0], 2); 336a4cf0443SUrsula Braun } 337a4cf0443SUrsula Braun 338a4cf0443SUrsula Braun bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport) 339a4cf0443SUrsula Braun { 340a4cf0443SUrsula Braun return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE; 341a4cf0443SUrsula Braun } 342a4cf0443SUrsula Braun 343a4cf0443SUrsula Braun int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport) 344a4cf0443SUrsula Braun { 345a4cf0443SUrsula Braun int rc; 346a4cf0443SUrsula Braun 347a4cf0443SUrsula Braun memset(&smcibdev->pattr[ibport - 1], 0, 348a4cf0443SUrsula Braun sizeof(smcibdev->pattr[ibport - 1])); 349a4cf0443SUrsula Braun rc = ib_query_port(smcibdev->ibdev, ibport, 350a4cf0443SUrsula Braun &smcibdev->pattr[ibport - 1]); 351a4cf0443SUrsula Braun if (rc) 352a4cf0443SUrsula Braun goto out; 353a4cf0443SUrsula Braun rc = smc_ib_fill_gid_and_mac(smcibdev, ibport); 354a4cf0443SUrsula Braun if (rc) 355a4cf0443SUrsula Braun goto out; 356a4cf0443SUrsula Braun if (!strncmp(local_systemid, SMC_LOCAL_SYSTEMID_RESET, 357a4cf0443SUrsula Braun sizeof(local_systemid)) && 358a4cf0443SUrsula Braun smc_ib_port_active(smcibdev, ibport)) 359a4cf0443SUrsula Braun /* create unique system identifier */ 360a4cf0443SUrsula Braun smc_ib_define_local_systemid(smcibdev, ibport); 361a4cf0443SUrsula Braun out: 362a4cf0443SUrsula Braun return rc; 363a4cf0443SUrsula Braun } 364a4cf0443SUrsula Braun 365bd4ad577SUrsula Braun long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev) 366bd4ad577SUrsula Braun { 367bd4ad577SUrsula Braun struct ib_cq_init_attr cqattr = { 368bd4ad577SUrsula Braun .cqe = SMC_WR_MAX_CQE, .comp_vector = 0 }; 369bd4ad577SUrsula Braun long rc; 370bd4ad577SUrsula Braun 371bd4ad577SUrsula Braun smcibdev->roce_cq_send = ib_create_cq(smcibdev->ibdev, 372bd4ad577SUrsula Braun smc_wr_tx_cq_handler, NULL, 373bd4ad577SUrsula Braun smcibdev, &cqattr); 374bd4ad577SUrsula Braun rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_send); 375bd4ad577SUrsula Braun if (IS_ERR(smcibdev->roce_cq_send)) { 376bd4ad577SUrsula Braun smcibdev->roce_cq_send = NULL; 377bd4ad577SUrsula Braun return rc; 378bd4ad577SUrsula Braun } 379bd4ad577SUrsula Braun smcibdev->roce_cq_recv = ib_create_cq(smcibdev->ibdev, 380bd4ad577SUrsula Braun smc_wr_rx_cq_handler, NULL, 381bd4ad577SUrsula Braun smcibdev, &cqattr); 382bd4ad577SUrsula Braun rc = PTR_ERR_OR_ZERO(smcibdev->roce_cq_recv); 383bd4ad577SUrsula Braun if (IS_ERR(smcibdev->roce_cq_recv)) { 384bd4ad577SUrsula Braun smcibdev->roce_cq_recv = NULL; 385bd4ad577SUrsula Braun goto err; 386bd4ad577SUrsula Braun } 387bd4ad577SUrsula Braun INIT_IB_EVENT_HANDLER(&smcibdev->event_handler, smcibdev->ibdev, 388bd4ad577SUrsula Braun smc_ib_global_event_handler); 389bd4ad577SUrsula Braun ib_register_event_handler(&smcibdev->event_handler); 390bd4ad577SUrsula Braun smc_wr_add_dev(smcibdev); 391bd4ad577SUrsula Braun smcibdev->initialized = 1; 392bd4ad577SUrsula Braun return rc; 393bd4ad577SUrsula Braun 394bd4ad577SUrsula Braun err: 395bd4ad577SUrsula Braun ib_destroy_cq(smcibdev->roce_cq_send); 396bd4ad577SUrsula Braun return rc; 397bd4ad577SUrsula Braun } 398bd4ad577SUrsula Braun 399bd4ad577SUrsula Braun static void smc_ib_cleanup_per_ibdev(struct smc_ib_device *smcibdev) 400bd4ad577SUrsula Braun { 401bd4ad577SUrsula Braun if (!smcibdev->initialized) 402bd4ad577SUrsula Braun return; 403bd4ad577SUrsula Braun smc_wr_remove_dev(smcibdev); 404bd4ad577SUrsula Braun ib_unregister_event_handler(&smcibdev->event_handler); 405bd4ad577SUrsula Braun ib_destroy_cq(smcibdev->roce_cq_recv); 406bd4ad577SUrsula Braun ib_destroy_cq(smcibdev->roce_cq_send); 407bd4ad577SUrsula Braun } 408bd4ad577SUrsula Braun 409a4cf0443SUrsula Braun static struct ib_client smc_ib_client; 410a4cf0443SUrsula Braun 411a4cf0443SUrsula Braun /* callback function for ib_register_client() */ 412a4cf0443SUrsula Braun static void smc_ib_add_dev(struct ib_device *ibdev) 413a4cf0443SUrsula Braun { 414a4cf0443SUrsula Braun struct smc_ib_device *smcibdev; 415a4cf0443SUrsula Braun 416a4cf0443SUrsula Braun if (ibdev->node_type != RDMA_NODE_IB_CA) 417a4cf0443SUrsula Braun return; 418a4cf0443SUrsula Braun 419a4cf0443SUrsula Braun smcibdev = kzalloc(sizeof(*smcibdev), GFP_KERNEL); 420a4cf0443SUrsula Braun if (!smcibdev) 421a4cf0443SUrsula Braun return; 422a4cf0443SUrsula Braun 423a4cf0443SUrsula Braun smcibdev->ibdev = ibdev; 424bd4ad577SUrsula Braun INIT_WORK(&smcibdev->port_event_work, smc_ib_port_event_work); 425a4cf0443SUrsula Braun 426a4cf0443SUrsula Braun spin_lock(&smc_ib_devices.lock); 427a4cf0443SUrsula Braun list_add_tail(&smcibdev->list, &smc_ib_devices.list); 428a4cf0443SUrsula Braun spin_unlock(&smc_ib_devices.lock); 429a4cf0443SUrsula Braun ib_set_client_data(ibdev, &smc_ib_client, smcibdev); 430a4cf0443SUrsula Braun } 431a4cf0443SUrsula Braun 432a4cf0443SUrsula Braun /* callback function for ib_register_client() */ 433a4cf0443SUrsula Braun static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data) 434a4cf0443SUrsula Braun { 435a4cf0443SUrsula Braun struct smc_ib_device *smcibdev; 436a4cf0443SUrsula Braun 437a4cf0443SUrsula Braun smcibdev = ib_get_client_data(ibdev, &smc_ib_client); 438a4cf0443SUrsula Braun ib_set_client_data(ibdev, &smc_ib_client, NULL); 439a4cf0443SUrsula Braun spin_lock(&smc_ib_devices.lock); 440a4cf0443SUrsula Braun list_del_init(&smcibdev->list); /* remove from smc_ib_devices */ 441a4cf0443SUrsula Braun spin_unlock(&smc_ib_devices.lock); 4426812baabSThomas Richter smc_pnet_remove_by_ibdev(smcibdev); 443bd4ad577SUrsula Braun smc_ib_cleanup_per_ibdev(smcibdev); 444a4cf0443SUrsula Braun kfree(smcibdev); 445a4cf0443SUrsula Braun } 446a4cf0443SUrsula Braun 447a4cf0443SUrsula Braun static struct ib_client smc_ib_client = { 448a4cf0443SUrsula Braun .name = "smc_ib", 449a4cf0443SUrsula Braun .add = smc_ib_add_dev, 450a4cf0443SUrsula Braun .remove = smc_ib_remove_dev, 451a4cf0443SUrsula Braun }; 452a4cf0443SUrsula Braun 453a4cf0443SUrsula Braun int __init smc_ib_register_client(void) 454a4cf0443SUrsula Braun { 455a4cf0443SUrsula Braun return ib_register_client(&smc_ib_client); 456a4cf0443SUrsula Braun } 457a4cf0443SUrsula Braun 458a4cf0443SUrsula Braun void smc_ib_unregister_client(void) 459a4cf0443SUrsula Braun { 460a4cf0443SUrsula Braun ib_unregister_client(&smc_ib_client); 461a4cf0443SUrsula Braun } 462