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 if (rxe->tfm) 35 crypto_free_shash(rxe->tfm); 36 37 mutex_destroy(&rxe->usdev_lock); 38 } 39 40 /* initialize rxe device parameters */ 41 static void rxe_init_device_param(struct rxe_dev *rxe) 42 { 43 struct net_device *ndev; 44 45 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 46 47 rxe->attr.vendor_id = RXE_VENDOR_ID; 48 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 49 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 50 rxe->attr.max_qp = RXE_MAX_QP; 51 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 52 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 53 rxe->attr.kernel_cap_flags = IBK_ALLOW_USER_UNREG; 54 rxe->attr.max_send_sge = RXE_MAX_SGE; 55 rxe->attr.max_recv_sge = RXE_MAX_SGE; 56 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 57 rxe->attr.max_cq = RXE_MAX_CQ; 58 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 59 rxe->attr.max_mr = RXE_MAX_MR; 60 rxe->attr.max_mw = RXE_MAX_MW; 61 rxe->attr.max_pd = RXE_MAX_PD; 62 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 63 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 64 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 65 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 66 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 67 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 68 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 69 rxe->attr.max_ah = RXE_MAX_AH; 70 rxe->attr.max_srq = RXE_MAX_SRQ; 71 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 72 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 73 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 74 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 75 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 76 77 ndev = rxe_ib_device_get_netdev(&rxe->ib_dev); 78 if (!ndev) 79 return; 80 81 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 82 ndev->dev_addr); 83 84 dev_put(ndev); 85 86 rxe->max_ucontext = RXE_MAX_UCONTEXT; 87 } 88 89 /* initialize port attributes */ 90 static void rxe_init_port_param(struct rxe_port *port) 91 { 92 port->attr.state = IB_PORT_DOWN; 93 port->attr.max_mtu = IB_MTU_4096; 94 port->attr.active_mtu = IB_MTU_256; 95 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 96 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 97 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 98 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 99 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 100 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 101 port->attr.lid = RXE_PORT_LID; 102 port->attr.sm_lid = RXE_PORT_SM_LID; 103 port->attr.lmc = RXE_PORT_LMC; 104 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 105 port->attr.sm_sl = RXE_PORT_SM_SL; 106 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 107 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 108 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 109 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 110 port->attr.phys_state = RXE_PORT_PHYS_STATE; 111 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 112 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 113 } 114 115 /* initialize port state, note IB convention that HCA ports are always 116 * numbered from 1 117 */ 118 static void rxe_init_ports(struct rxe_dev *rxe) 119 { 120 struct rxe_port *port = &rxe->port; 121 struct net_device *ndev; 122 123 rxe_init_port_param(port); 124 ndev = rxe_ib_device_get_netdev(&rxe->ib_dev); 125 if (!ndev) 126 return; 127 addrconf_addr_eui48((unsigned char *)&port->port_guid, 128 ndev->dev_addr); 129 dev_put(ndev); 130 spin_lock_init(&port->port_lock); 131 } 132 133 /* init pools of managed objects */ 134 static void rxe_init_pools(struct rxe_dev *rxe) 135 { 136 rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); 137 rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); 138 rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); 139 rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); 140 rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); 141 rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); 142 rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); 143 rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); 144 } 145 146 /* initialize rxe device state */ 147 static void rxe_init(struct rxe_dev *rxe) 148 { 149 /* init default device parameters */ 150 rxe_init_device_param(rxe); 151 152 rxe_init_ports(rxe); 153 rxe_init_pools(rxe); 154 155 /* init pending mmap list */ 156 spin_lock_init(&rxe->mmap_offset_lock); 157 spin_lock_init(&rxe->pending_lock); 158 INIT_LIST_HEAD(&rxe->pending_mmaps); 159 160 /* init multicast support */ 161 spin_lock_init(&rxe->mcg_lock); 162 rxe->mcg_tree = RB_ROOT; 163 164 mutex_init(&rxe->usdev_lock); 165 } 166 167 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 168 { 169 struct rxe_port *port = &rxe->port; 170 enum ib_mtu mtu; 171 172 mtu = eth_mtu_int_to_enum(ndev_mtu); 173 174 /* Make sure that new MTU in range */ 175 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 176 177 port->attr.active_mtu = mtu; 178 port->mtu_cap = ib_mtu_enum_to_int(mtu); 179 } 180 181 /* called by ifc layer to create new rxe device. 182 * The caller should allocate memory for rxe by calling ib_alloc_device. 183 */ 184 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name, 185 struct net_device *ndev) 186 { 187 rxe_init(rxe); 188 rxe_set_mtu(rxe, mtu); 189 190 return rxe_register_device(rxe, ibdev_name, ndev); 191 } 192 193 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 194 { 195 struct rxe_dev *rxe; 196 int err = 0; 197 198 if (is_vlan_dev(ndev)) { 199 rxe_err("rxe creation allowed on top of a real device only\n"); 200 err = -EPERM; 201 goto err; 202 } 203 204 rxe = rxe_get_dev_from_net(ndev); 205 if (rxe) { 206 ib_device_put(&rxe->ib_dev); 207 rxe_err_dev(rxe, "already configured on %s\n", ndev->name); 208 err = -EEXIST; 209 goto err; 210 } 211 212 err = rxe_net_add(ibdev_name, ndev); 213 if (err) { 214 rxe_err("failed to add %s\n", ndev->name); 215 goto err; 216 } 217 err: 218 return err; 219 } 220 221 static struct rdma_link_ops rxe_link_ops = { 222 .type = "rxe", 223 .newlink = rxe_newlink, 224 }; 225 226 static int __init rxe_module_init(void) 227 { 228 int err; 229 230 err = rxe_alloc_wq(); 231 if (err) 232 return err; 233 234 err = rxe_net_init(); 235 if (err) { 236 rxe_destroy_wq(); 237 return err; 238 } 239 240 rdma_link_register(&rxe_link_ops); 241 pr_info("loaded\n"); 242 return 0; 243 } 244 245 static void __exit rxe_module_exit(void) 246 { 247 rdma_link_unregister(&rxe_link_ops); 248 ib_unregister_driver(RDMA_DRIVER_RXE); 249 rxe_net_exit(); 250 rxe_destroy_wq(); 251 252 pr_info("unloaded\n"); 253 } 254 255 late_initcall(rxe_module_init); 256 module_exit(rxe_module_exit); 257 258 MODULE_ALIAS_RDMA_LINK("rxe"); 259