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 bool rxe_initialized; 17 18 /* free resources for a rxe device all objects created for this device must 19 * have been destroyed 20 */ 21 void rxe_dealloc(struct ib_device *ib_dev) 22 { 23 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 24 25 rxe_pool_cleanup(&rxe->uc_pool); 26 rxe_pool_cleanup(&rxe->pd_pool); 27 rxe_pool_cleanup(&rxe->ah_pool); 28 rxe_pool_cleanup(&rxe->srq_pool); 29 rxe_pool_cleanup(&rxe->qp_pool); 30 rxe_pool_cleanup(&rxe->cq_pool); 31 rxe_pool_cleanup(&rxe->mr_pool); 32 rxe_pool_cleanup(&rxe->mw_pool); 33 rxe_pool_cleanup(&rxe->mc_grp_pool); 34 rxe_pool_cleanup(&rxe->mc_elem_pool); 35 36 if (rxe->tfm) 37 crypto_free_shash(rxe->tfm); 38 } 39 40 /* initialize rxe device parameters */ 41 static void rxe_init_device_param(struct rxe_dev *rxe) 42 { 43 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 44 45 rxe->attr.vendor_id = RXE_VENDOR_ID; 46 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 47 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 48 rxe->attr.max_qp = RXE_MAX_QP; 49 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 50 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 51 rxe->attr.max_send_sge = RXE_MAX_SGE; 52 rxe->attr.max_recv_sge = RXE_MAX_SGE; 53 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 54 rxe->attr.max_cq = RXE_MAX_CQ; 55 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 56 rxe->attr.max_mr = RXE_MAX_MR; 57 rxe->attr.max_pd = RXE_MAX_PD; 58 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 59 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 60 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 61 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 62 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 63 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 64 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 65 rxe->attr.max_ah = RXE_MAX_AH; 66 rxe->attr.max_srq = RXE_MAX_SRQ; 67 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 68 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 69 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 70 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 71 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 72 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 73 rxe->ndev->dev_addr); 74 75 rxe->max_ucontext = RXE_MAX_UCONTEXT; 76 } 77 78 /* initialize port attributes */ 79 static void rxe_init_port_param(struct rxe_port *port) 80 { 81 port->attr.state = IB_PORT_DOWN; 82 port->attr.max_mtu = IB_MTU_4096; 83 port->attr.active_mtu = IB_MTU_256; 84 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 85 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 86 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 87 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 88 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 89 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 90 port->attr.lid = RXE_PORT_LID; 91 port->attr.sm_lid = RXE_PORT_SM_LID; 92 port->attr.lmc = RXE_PORT_LMC; 93 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 94 port->attr.sm_sl = RXE_PORT_SM_SL; 95 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 96 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 97 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 98 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 99 port->attr.phys_state = RXE_PORT_PHYS_STATE; 100 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 101 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 102 } 103 104 /* initialize port state, note IB convention that HCA ports are always 105 * numbered from 1 106 */ 107 static void rxe_init_ports(struct rxe_dev *rxe) 108 { 109 struct rxe_port *port = &rxe->port; 110 111 rxe_init_port_param(port); 112 addrconf_addr_eui48((unsigned char *)&port->port_guid, 113 rxe->ndev->dev_addr); 114 spin_lock_init(&port->port_lock); 115 } 116 117 /* init pools of managed objects */ 118 static int rxe_init_pools(struct rxe_dev *rxe) 119 { 120 int err; 121 122 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 123 rxe->max_ucontext); 124 if (err) 125 goto err1; 126 127 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 128 rxe->attr.max_pd); 129 if (err) 130 goto err2; 131 132 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 133 rxe->attr.max_ah); 134 if (err) 135 goto err3; 136 137 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 138 rxe->attr.max_srq); 139 if (err) 140 goto err4; 141 142 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 143 rxe->attr.max_qp); 144 if (err) 145 goto err5; 146 147 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 148 rxe->attr.max_cq); 149 if (err) 150 goto err6; 151 152 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 153 rxe->attr.max_mr); 154 if (err) 155 goto err7; 156 157 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 158 rxe->attr.max_mw); 159 if (err) 160 goto err8; 161 162 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 163 rxe->attr.max_mcast_grp); 164 if (err) 165 goto err9; 166 167 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM, 168 rxe->attr.max_total_mcast_qp_attach); 169 if (err) 170 goto err10; 171 172 return 0; 173 174 err10: 175 rxe_pool_cleanup(&rxe->mc_grp_pool); 176 err9: 177 rxe_pool_cleanup(&rxe->mw_pool); 178 err8: 179 rxe_pool_cleanup(&rxe->mr_pool); 180 err7: 181 rxe_pool_cleanup(&rxe->cq_pool); 182 err6: 183 rxe_pool_cleanup(&rxe->qp_pool); 184 err5: 185 rxe_pool_cleanup(&rxe->srq_pool); 186 err4: 187 rxe_pool_cleanup(&rxe->ah_pool); 188 err3: 189 rxe_pool_cleanup(&rxe->pd_pool); 190 err2: 191 rxe_pool_cleanup(&rxe->uc_pool); 192 err1: 193 return err; 194 } 195 196 /* initialize rxe device state */ 197 static int rxe_init(struct rxe_dev *rxe) 198 { 199 int err; 200 201 /* init default device parameters */ 202 rxe_init_device_param(rxe); 203 204 rxe_init_ports(rxe); 205 206 err = rxe_init_pools(rxe); 207 if (err) 208 return err; 209 210 /* init pending mmap list */ 211 spin_lock_init(&rxe->mmap_offset_lock); 212 spin_lock_init(&rxe->pending_lock); 213 INIT_LIST_HEAD(&rxe->pending_mmaps); 214 215 mutex_init(&rxe->usdev_lock); 216 217 return 0; 218 } 219 220 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 221 { 222 struct rxe_port *port = &rxe->port; 223 enum ib_mtu mtu; 224 225 mtu = eth_mtu_int_to_enum(ndev_mtu); 226 227 /* Make sure that new MTU in range */ 228 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 229 230 port->attr.active_mtu = mtu; 231 port->mtu_cap = ib_mtu_enum_to_int(mtu); 232 } 233 234 /* called by ifc layer to create new rxe device. 235 * The caller should allocate memory for rxe by calling ib_alloc_device. 236 */ 237 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 238 { 239 int err; 240 241 err = rxe_init(rxe); 242 if (err) 243 return err; 244 245 rxe_set_mtu(rxe, mtu); 246 247 return rxe_register_device(rxe, ibdev_name); 248 } 249 250 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 251 { 252 struct rxe_dev *exists; 253 int err = 0; 254 255 if (is_vlan_dev(ndev)) { 256 pr_err("rxe creation allowed on top of a real device only\n"); 257 err = -EPERM; 258 goto err; 259 } 260 261 exists = rxe_get_dev_from_net(ndev); 262 if (exists) { 263 ib_device_put(&exists->ib_dev); 264 pr_err("already configured on %s\n", ndev->name); 265 err = -EEXIST; 266 goto err; 267 } 268 269 err = rxe_net_add(ibdev_name, ndev); 270 if (err) { 271 pr_err("failed to add %s\n", ndev->name); 272 goto err; 273 } 274 err: 275 return err; 276 } 277 278 static struct rdma_link_ops rxe_link_ops = { 279 .type = "rxe", 280 .newlink = rxe_newlink, 281 }; 282 283 static int __init rxe_module_init(void) 284 { 285 int err; 286 287 err = rxe_net_init(); 288 if (err) 289 return err; 290 291 rdma_link_register(&rxe_link_ops); 292 rxe_initialized = true; 293 pr_info("loaded\n"); 294 return 0; 295 } 296 297 static void __exit rxe_module_exit(void) 298 { 299 rdma_link_unregister(&rxe_link_ops); 300 ib_unregister_driver(RDMA_DRIVER_RXE); 301 rxe_net_exit(); 302 303 rxe_initialized = false; 304 pr_info("unloaded\n"); 305 } 306 307 late_initcall(rxe_module_init); 308 module_exit(rxe_module_exit); 309 310 MODULE_ALIAS_RDMA_LINK("rxe"); 311