1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 5 */ 6 7 #include <rdma/rdma_netlink.h> 8 #include <net/addrconf.h> 9 #include "rxe.h" 10 #include "rxe_loc.h" 11 12 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib"); 13 MODULE_DESCRIPTION("Soft RDMA transport"); 14 MODULE_LICENSE("Dual BSD/GPL"); 15 16 /* free resources for a rxe device all objects created for this device must 17 * have been destroyed 18 */ 19 void rxe_dealloc(struct ib_device *ib_dev) 20 { 21 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 22 23 rxe_pool_cleanup(&rxe->uc_pool); 24 rxe_pool_cleanup(&rxe->pd_pool); 25 rxe_pool_cleanup(&rxe->ah_pool); 26 rxe_pool_cleanup(&rxe->srq_pool); 27 rxe_pool_cleanup(&rxe->qp_pool); 28 rxe_pool_cleanup(&rxe->cq_pool); 29 rxe_pool_cleanup(&rxe->mr_pool); 30 rxe_pool_cleanup(&rxe->mw_pool); 31 32 WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree)); 33 34 mutex_destroy(&rxe->usdev_lock); 35 } 36 37 static const struct ib_device_ops rxe_ib_dev_odp_ops = { 38 .advise_mr = rxe_ib_advise_mr, 39 }; 40 41 /* initialize rxe device parameters */ 42 static void rxe_init_device_param(struct rxe_dev *rxe, struct net_device *ndev) 43 { 44 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 45 46 rxe->attr.vendor_id = RXE_VENDOR_ID; 47 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 48 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 49 rxe->attr.max_qp = RXE_MAX_QP; 50 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 51 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 52 rxe->attr.kernel_cap_flags = IBK_ALLOW_USER_UNREG; 53 rxe->attr.max_send_sge = RXE_MAX_SGE; 54 rxe->attr.max_recv_sge = RXE_MAX_SGE; 55 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 56 rxe->attr.max_cq = RXE_MAX_CQ; 57 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 58 rxe->attr.max_mr = RXE_MAX_MR; 59 rxe->attr.max_mw = RXE_MAX_MW; 60 rxe->attr.max_pd = RXE_MAX_PD; 61 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 62 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 63 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 64 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 65 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 66 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 67 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 68 rxe->attr.max_ah = RXE_MAX_AH; 69 rxe->attr.max_srq = RXE_MAX_SRQ; 70 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 71 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 72 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 73 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 74 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 75 76 if (ndev->addr_len) { 77 memcpy(rxe->raw_gid, ndev->dev_addr, 78 min_t(unsigned int, ndev->addr_len, ETH_ALEN)); 79 } else { 80 /* 81 * This device does not have a HW address, but 82 * connection mangagement requires a unique gid. 83 */ 84 eth_random_addr(rxe->raw_gid); 85 } 86 87 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 88 rxe->raw_gid); 89 90 rxe->max_ucontext = RXE_MAX_UCONTEXT; 91 92 if (IS_ENABLED(CONFIG_INFINIBAND_ON_DEMAND_PAGING)) { 93 rxe->attr.kernel_cap_flags |= IBK_ON_DEMAND_PAGING; 94 95 /* IB_ODP_SUPPORT_IMPLICIT is not supported right now. */ 96 rxe->attr.odp_caps.general_caps |= IB_ODP_SUPPORT; 97 98 rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_SEND; 99 rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_RECV; 100 rxe->attr.odp_caps.per_transport_caps.ud_odp_caps |= IB_ODP_SUPPORT_SRQ_RECV; 101 102 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_SEND; 103 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_RECV; 104 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_WRITE; 105 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_READ; 106 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_ATOMIC; 107 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_SRQ_RECV; 108 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_FLUSH; 109 rxe->attr.odp_caps.per_transport_caps.rc_odp_caps |= IB_ODP_SUPPORT_ATOMIC_WRITE; 110 111 /* set handler for ODP prefetching API - ibv_advise_mr(3) */ 112 ib_set_device_ops(&rxe->ib_dev, &rxe_ib_dev_odp_ops); 113 } 114 } 115 116 /* initialize port attributes */ 117 static void rxe_init_port_param(struct rxe_port *port) 118 { 119 port->attr.state = IB_PORT_DOWN; 120 port->attr.max_mtu = IB_MTU_4096; 121 port->attr.active_mtu = IB_MTU_256; 122 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 123 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 124 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 125 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 126 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 127 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 128 port->attr.lid = RXE_PORT_LID; 129 port->attr.sm_lid = RXE_PORT_SM_LID; 130 port->attr.lmc = RXE_PORT_LMC; 131 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 132 port->attr.sm_sl = RXE_PORT_SM_SL; 133 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 134 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 135 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 136 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 137 port->attr.phys_state = RXE_PORT_PHYS_STATE; 138 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 139 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 140 } 141 142 /* initialize port state, note IB convention that HCA ports are always 143 * numbered from 1 144 */ 145 static void rxe_init_ports(struct rxe_dev *rxe, struct net_device *ndev) 146 { 147 struct rxe_port *port = &rxe->port; 148 149 rxe_init_port_param(port); 150 addrconf_addr_eui48((unsigned char *)&port->port_guid, 151 rxe->raw_gid); 152 spin_lock_init(&port->port_lock); 153 } 154 155 /* init pools of managed objects */ 156 static void rxe_init_pools(struct rxe_dev *rxe) 157 { 158 rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); 159 rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); 160 rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); 161 rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); 162 rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); 163 rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); 164 rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); 165 rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); 166 } 167 168 /* initialize rxe device state */ 169 static void rxe_init(struct rxe_dev *rxe, struct net_device *ndev) 170 { 171 /* init default device parameters */ 172 rxe_init_device_param(rxe, ndev); 173 174 rxe_init_ports(rxe, ndev); 175 rxe_init_pools(rxe); 176 177 /* init pending mmap list */ 178 spin_lock_init(&rxe->mmap_offset_lock); 179 spin_lock_init(&rxe->pending_lock); 180 INIT_LIST_HEAD(&rxe->pending_mmaps); 181 182 /* init multicast support */ 183 spin_lock_init(&rxe->mcg_lock); 184 rxe->mcg_tree = RB_ROOT; 185 186 mutex_init(&rxe->usdev_lock); 187 } 188 189 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 190 { 191 struct rxe_port *port = &rxe->port; 192 enum ib_mtu mtu; 193 194 mtu = eth_mtu_int_to_enum(ndev_mtu); 195 196 /* Make sure that new MTU in range */ 197 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 198 199 port->attr.active_mtu = mtu; 200 port->mtu_cap = ib_mtu_enum_to_int(mtu); 201 } 202 203 /* called by ifc layer to create new rxe device. 204 * The caller should allocate memory for rxe by calling ib_alloc_device. 205 */ 206 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name, 207 struct net_device *ndev) 208 { 209 rxe_init(rxe, ndev); 210 rxe_set_mtu(rxe, mtu); 211 212 return rxe_register_device(rxe, ibdev_name, ndev); 213 } 214 215 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 216 { 217 struct rxe_dev *rxe; 218 int err = 0; 219 220 if (is_vlan_dev(ndev)) { 221 rxe_err("rxe creation allowed on top of a real device only\n"); 222 err = -EPERM; 223 goto err; 224 } 225 226 rxe = rxe_get_dev_from_net(ndev); 227 if (rxe) { 228 ib_device_put(&rxe->ib_dev); 229 rxe_err_dev(rxe, "already configured on %s\n", ndev->name); 230 err = -EEXIST; 231 goto err; 232 } 233 234 err = rxe_net_add(ibdev_name, ndev); 235 if (err) { 236 rxe_err("failed to add %s\n", ndev->name); 237 goto err; 238 } 239 err: 240 return err; 241 } 242 243 static struct rdma_link_ops rxe_link_ops = { 244 .type = "rxe", 245 .newlink = rxe_newlink, 246 }; 247 248 static int __init rxe_module_init(void) 249 { 250 int err; 251 252 err = rxe_alloc_wq(); 253 if (err) 254 return err; 255 256 err = rxe_net_init(); 257 if (err) { 258 rxe_destroy_wq(); 259 return err; 260 } 261 262 rdma_link_register(&rxe_link_ops); 263 pr_info("loaded\n"); 264 return 0; 265 } 266 267 static void __exit rxe_module_exit(void) 268 { 269 rdma_link_unregister(&rxe_link_ops); 270 ib_unregister_driver(RDMA_DRIVER_RXE); 271 rxe_net_exit(); 272 rxe_destroy_wq(); 273 274 pr_info("unloaded\n"); 275 } 276 277 late_initcall(rxe_module_init); 278 module_exit(rxe_module_exit); 279 280 MODULE_ALIAS_RDMA_LINK("rxe"); 281