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 38 /* initialize rxe device parameters */ 39 static void rxe_init_device_param(struct rxe_dev *rxe) 40 { 41 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 42 43 rxe->attr.vendor_id = RXE_VENDOR_ID; 44 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 45 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 46 rxe->attr.max_qp = RXE_MAX_QP; 47 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 48 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 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 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 72 rxe->ndev->dev_addr); 73 74 rxe->max_ucontext = RXE_MAX_UCONTEXT; 75 } 76 77 /* initialize port attributes */ 78 static void rxe_init_port_param(struct rxe_port *port) 79 { 80 port->attr.state = IB_PORT_DOWN; 81 port->attr.max_mtu = IB_MTU_4096; 82 port->attr.active_mtu = IB_MTU_256; 83 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 84 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 85 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 86 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 87 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 88 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 89 port->attr.lid = RXE_PORT_LID; 90 port->attr.sm_lid = RXE_PORT_SM_LID; 91 port->attr.lmc = RXE_PORT_LMC; 92 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 93 port->attr.sm_sl = RXE_PORT_SM_SL; 94 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 95 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 96 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 97 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 98 port->attr.phys_state = RXE_PORT_PHYS_STATE; 99 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 100 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 101 } 102 103 /* initialize port state, note IB convention that HCA ports are always 104 * numbered from 1 105 */ 106 static void rxe_init_ports(struct rxe_dev *rxe) 107 { 108 struct rxe_port *port = &rxe->port; 109 110 rxe_init_port_param(port); 111 addrconf_addr_eui48((unsigned char *)&port->port_guid, 112 rxe->ndev->dev_addr); 113 spin_lock_init(&port->port_lock); 114 } 115 116 /* init pools of managed objects */ 117 static void rxe_init_pools(struct rxe_dev *rxe) 118 { 119 rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC); 120 rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD); 121 rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH); 122 rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ); 123 rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP); 124 rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ); 125 rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR); 126 rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW); 127 } 128 129 /* initialize rxe device state */ 130 static void rxe_init(struct rxe_dev *rxe) 131 { 132 /* init default device parameters */ 133 rxe_init_device_param(rxe); 134 135 rxe_init_ports(rxe); 136 rxe_init_pools(rxe); 137 138 /* init pending mmap list */ 139 spin_lock_init(&rxe->mmap_offset_lock); 140 spin_lock_init(&rxe->pending_lock); 141 INIT_LIST_HEAD(&rxe->pending_mmaps); 142 143 /* init multicast support */ 144 spin_lock_init(&rxe->mcg_lock); 145 rxe->mcg_tree = RB_ROOT; 146 147 mutex_init(&rxe->usdev_lock); 148 } 149 150 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 151 { 152 struct rxe_port *port = &rxe->port; 153 enum ib_mtu mtu; 154 155 mtu = eth_mtu_int_to_enum(ndev_mtu); 156 157 /* Make sure that new MTU in range */ 158 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 159 160 port->attr.active_mtu = mtu; 161 port->mtu_cap = ib_mtu_enum_to_int(mtu); 162 } 163 164 /* called by ifc layer to create new rxe device. 165 * The caller should allocate memory for rxe by calling ib_alloc_device. 166 */ 167 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 168 { 169 rxe_init(rxe); 170 rxe_set_mtu(rxe, mtu); 171 172 return rxe_register_device(rxe, ibdev_name); 173 } 174 175 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 176 { 177 struct rxe_dev *exists; 178 int err = 0; 179 180 if (is_vlan_dev(ndev)) { 181 pr_err("rxe creation allowed on top of a real device only\n"); 182 err = -EPERM; 183 goto err; 184 } 185 186 exists = rxe_get_dev_from_net(ndev); 187 if (exists) { 188 ib_device_put(&exists->ib_dev); 189 pr_err("already configured on %s\n", ndev->name); 190 err = -EEXIST; 191 goto err; 192 } 193 194 err = rxe_net_add(ibdev_name, ndev); 195 if (err) { 196 pr_err("failed to add %s\n", ndev->name); 197 goto err; 198 } 199 err: 200 return err; 201 } 202 203 static struct rdma_link_ops rxe_link_ops = { 204 .type = "rxe", 205 .newlink = rxe_newlink, 206 }; 207 208 static int __init rxe_module_init(void) 209 { 210 int err; 211 212 err = rxe_net_init(); 213 if (err) 214 return err; 215 216 rdma_link_register(&rxe_link_ops); 217 pr_info("loaded\n"); 218 return 0; 219 } 220 221 static void __exit rxe_module_exit(void) 222 { 223 rdma_link_unregister(&rxe_link_ops); 224 ib_unregister_driver(RDMA_DRIVER_RXE); 225 rxe_net_exit(); 226 227 pr_info("unloaded\n"); 228 } 229 230 late_initcall(rxe_module_init); 231 module_exit(rxe_module_exit); 232 233 MODULE_ALIAS_RDMA_LINK("rxe"); 234