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