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 rxe_pool_cleanup(&rxe->mc_grp_pool); 32 33 if (rxe->tfm) 34 crypto_free_shash(rxe->tfm); 35 } 36 37 /* initialize rxe device parameters */ 38 static void rxe_init_device_param(struct rxe_dev *rxe) 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.max_send_sge = RXE_MAX_SGE; 49 rxe->attr.max_recv_sge = RXE_MAX_SGE; 50 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 51 rxe->attr.max_cq = RXE_MAX_CQ; 52 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 53 rxe->attr.max_mr = RXE_MAX_MR; 54 rxe->attr.max_mw = RXE_MAX_MW; 55 rxe->attr.max_pd = RXE_MAX_PD; 56 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 57 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 58 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 59 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 60 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 61 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 62 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 63 rxe->attr.max_ah = RXE_MAX_AH; 64 rxe->attr.max_srq = RXE_MAX_SRQ; 65 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 66 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 67 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 68 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 69 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 70 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 71 rxe->ndev->dev_addr); 72 73 rxe->max_ucontext = RXE_MAX_UCONTEXT; 74 } 75 76 /* initialize port attributes */ 77 static void rxe_init_port_param(struct rxe_port *port) 78 { 79 port->attr.state = IB_PORT_DOWN; 80 port->attr.max_mtu = IB_MTU_4096; 81 port->attr.active_mtu = IB_MTU_256; 82 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 83 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 84 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 85 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 86 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 87 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 88 port->attr.lid = RXE_PORT_LID; 89 port->attr.sm_lid = RXE_PORT_SM_LID; 90 port->attr.lmc = RXE_PORT_LMC; 91 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 92 port->attr.sm_sl = RXE_PORT_SM_SL; 93 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 94 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 95 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 96 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 97 port->attr.phys_state = RXE_PORT_PHYS_STATE; 98 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 99 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 100 } 101 102 /* initialize port state, note IB convention that HCA ports are always 103 * numbered from 1 104 */ 105 static void rxe_init_ports(struct rxe_dev *rxe) 106 { 107 struct rxe_port *port = &rxe->port; 108 109 rxe_init_port_param(port); 110 addrconf_addr_eui48((unsigned char *)&port->port_guid, 111 rxe->ndev->dev_addr); 112 spin_lock_init(&port->port_lock); 113 } 114 115 /* init pools of managed objects */ 116 static int rxe_init_pools(struct rxe_dev *rxe) 117 { 118 int err; 119 120 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 121 rxe->max_ucontext); 122 if (err) 123 goto err1; 124 125 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 126 rxe->attr.max_pd); 127 if (err) 128 goto err2; 129 130 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 131 rxe->attr.max_ah); 132 if (err) 133 goto err3; 134 135 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 136 rxe->attr.max_srq); 137 if (err) 138 goto err4; 139 140 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 141 rxe->attr.max_qp); 142 if (err) 143 goto err5; 144 145 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 146 rxe->attr.max_cq); 147 if (err) 148 goto err6; 149 150 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 151 rxe->attr.max_mr); 152 if (err) 153 goto err7; 154 155 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 156 rxe->attr.max_mw); 157 if (err) 158 goto err8; 159 160 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 161 rxe->attr.max_mcast_grp); 162 if (err) 163 goto err9; 164 165 return 0; 166 167 err9: 168 rxe_pool_cleanup(&rxe->mw_pool); 169 err8: 170 rxe_pool_cleanup(&rxe->mr_pool); 171 err7: 172 rxe_pool_cleanup(&rxe->cq_pool); 173 err6: 174 rxe_pool_cleanup(&rxe->qp_pool); 175 err5: 176 rxe_pool_cleanup(&rxe->srq_pool); 177 err4: 178 rxe_pool_cleanup(&rxe->ah_pool); 179 err3: 180 rxe_pool_cleanup(&rxe->pd_pool); 181 err2: 182 rxe_pool_cleanup(&rxe->uc_pool); 183 err1: 184 return err; 185 } 186 187 /* initialize rxe device state */ 188 static int rxe_init(struct rxe_dev *rxe) 189 { 190 int err; 191 192 /* init default device parameters */ 193 rxe_init_device_param(rxe); 194 195 rxe_init_ports(rxe); 196 197 err = rxe_init_pools(rxe); 198 if (err) 199 return err; 200 201 /* init pending mmap list */ 202 spin_lock_init(&rxe->mmap_offset_lock); 203 spin_lock_init(&rxe->pending_lock); 204 INIT_LIST_HEAD(&rxe->pending_mmaps); 205 206 spin_lock_init(&rxe->mcg_lock); 207 208 mutex_init(&rxe->usdev_lock); 209 210 return 0; 211 } 212 213 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 214 { 215 struct rxe_port *port = &rxe->port; 216 enum ib_mtu mtu; 217 218 mtu = eth_mtu_int_to_enum(ndev_mtu); 219 220 /* Make sure that new MTU in range */ 221 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 222 223 port->attr.active_mtu = mtu; 224 port->mtu_cap = ib_mtu_enum_to_int(mtu); 225 } 226 227 /* called by ifc layer to create new rxe device. 228 * The caller should allocate memory for rxe by calling ib_alloc_device. 229 */ 230 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 231 { 232 int err; 233 234 err = rxe_init(rxe); 235 if (err) 236 return err; 237 238 rxe_set_mtu(rxe, mtu); 239 240 return rxe_register_device(rxe, ibdev_name); 241 } 242 243 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 244 { 245 struct rxe_dev *exists; 246 int err = 0; 247 248 if (is_vlan_dev(ndev)) { 249 pr_err("rxe creation allowed on top of a real device only\n"); 250 err = -EPERM; 251 goto err; 252 } 253 254 exists = rxe_get_dev_from_net(ndev); 255 if (exists) { 256 ib_device_put(&exists->ib_dev); 257 pr_err("already configured on %s\n", ndev->name); 258 err = -EEXIST; 259 goto err; 260 } 261 262 err = rxe_net_add(ibdev_name, ndev); 263 if (err) { 264 pr_err("failed to add %s\n", ndev->name); 265 goto err; 266 } 267 err: 268 return err; 269 } 270 271 static struct rdma_link_ops rxe_link_ops = { 272 .type = "rxe", 273 .newlink = rxe_newlink, 274 }; 275 276 static int __init rxe_module_init(void) 277 { 278 int err; 279 280 err = rxe_net_init(); 281 if (err) 282 return err; 283 284 rdma_link_register(&rxe_link_ops); 285 pr_info("loaded\n"); 286 return 0; 287 } 288 289 static void __exit rxe_module_exit(void) 290 { 291 rdma_link_unregister(&rxe_link_ops); 292 ib_unregister_driver(RDMA_DRIVER_RXE); 293 rxe_net_exit(); 294 295 pr_info("unloaded\n"); 296 } 297 298 late_initcall(rxe_module_init); 299 module_exit(rxe_module_exit); 300 301 MODULE_ALIAS_RDMA_LINK("rxe"); 302