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_mw = RXE_MAX_MW; 58 rxe->attr.max_pd = RXE_MAX_PD; 59 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 60 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 61 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 62 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 63 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 64 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 65 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 66 rxe->attr.max_ah = RXE_MAX_AH; 67 rxe->attr.max_srq = RXE_MAX_SRQ; 68 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 69 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 70 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 71 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 72 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 73 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid, 74 rxe->ndev->dev_addr); 75 76 rxe->max_ucontext = RXE_MAX_UCONTEXT; 77 } 78 79 /* initialize port attributes */ 80 static void rxe_init_port_param(struct rxe_port *port) 81 { 82 port->attr.state = IB_PORT_DOWN; 83 port->attr.max_mtu = IB_MTU_4096; 84 port->attr.active_mtu = IB_MTU_256; 85 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 86 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 87 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 88 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 89 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 90 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 91 port->attr.lid = RXE_PORT_LID; 92 port->attr.sm_lid = RXE_PORT_SM_LID; 93 port->attr.lmc = RXE_PORT_LMC; 94 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 95 port->attr.sm_sl = RXE_PORT_SM_SL; 96 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 97 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 98 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 99 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 100 port->attr.phys_state = RXE_PORT_PHYS_STATE; 101 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 102 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 103 } 104 105 /* initialize port state, note IB convention that HCA ports are always 106 * numbered from 1 107 */ 108 static void rxe_init_ports(struct rxe_dev *rxe) 109 { 110 struct rxe_port *port = &rxe->port; 111 112 rxe_init_port_param(port); 113 addrconf_addr_eui48((unsigned char *)&port->port_guid, 114 rxe->ndev->dev_addr); 115 spin_lock_init(&port->port_lock); 116 } 117 118 /* init pools of managed objects */ 119 static int rxe_init_pools(struct rxe_dev *rxe) 120 { 121 int err; 122 123 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 124 rxe->max_ucontext); 125 if (err) 126 goto err1; 127 128 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 129 rxe->attr.max_pd); 130 if (err) 131 goto err2; 132 133 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 134 rxe->attr.max_ah); 135 if (err) 136 goto err3; 137 138 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 139 rxe->attr.max_srq); 140 if (err) 141 goto err4; 142 143 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 144 rxe->attr.max_qp); 145 if (err) 146 goto err5; 147 148 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 149 rxe->attr.max_cq); 150 if (err) 151 goto err6; 152 153 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 154 rxe->attr.max_mr); 155 if (err) 156 goto err7; 157 158 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 159 rxe->attr.max_mw); 160 if (err) 161 goto err8; 162 163 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 164 rxe->attr.max_mcast_grp); 165 if (err) 166 goto err9; 167 168 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM, 169 rxe->attr.max_total_mcast_qp_attach); 170 if (err) 171 goto err10; 172 173 return 0; 174 175 err10: 176 rxe_pool_cleanup(&rxe->mc_grp_pool); 177 err9: 178 rxe_pool_cleanup(&rxe->mw_pool); 179 err8: 180 rxe_pool_cleanup(&rxe->mr_pool); 181 err7: 182 rxe_pool_cleanup(&rxe->cq_pool); 183 err6: 184 rxe_pool_cleanup(&rxe->qp_pool); 185 err5: 186 rxe_pool_cleanup(&rxe->srq_pool); 187 err4: 188 rxe_pool_cleanup(&rxe->ah_pool); 189 err3: 190 rxe_pool_cleanup(&rxe->pd_pool); 191 err2: 192 rxe_pool_cleanup(&rxe->uc_pool); 193 err1: 194 return err; 195 } 196 197 /* initialize rxe device state */ 198 static int rxe_init(struct rxe_dev *rxe) 199 { 200 int err; 201 202 /* init default device parameters */ 203 rxe_init_device_param(rxe); 204 205 rxe_init_ports(rxe); 206 207 err = rxe_init_pools(rxe); 208 if (err) 209 return err; 210 211 /* init pending mmap list */ 212 spin_lock_init(&rxe->mmap_offset_lock); 213 spin_lock_init(&rxe->pending_lock); 214 INIT_LIST_HEAD(&rxe->pending_mmaps); 215 216 mutex_init(&rxe->usdev_lock); 217 218 return 0; 219 } 220 221 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 222 { 223 struct rxe_port *port = &rxe->port; 224 enum ib_mtu mtu; 225 226 mtu = eth_mtu_int_to_enum(ndev_mtu); 227 228 /* Make sure that new MTU in range */ 229 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 230 231 port->attr.active_mtu = mtu; 232 port->mtu_cap = ib_mtu_enum_to_int(mtu); 233 } 234 235 /* called by ifc layer to create new rxe device. 236 * The caller should allocate memory for rxe by calling ib_alloc_device. 237 */ 238 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 239 { 240 int err; 241 242 err = rxe_init(rxe); 243 if (err) 244 return err; 245 246 rxe_set_mtu(rxe, mtu); 247 248 return rxe_register_device(rxe, ibdev_name); 249 } 250 251 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 252 { 253 struct rxe_dev *exists; 254 int err = 0; 255 256 if (is_vlan_dev(ndev)) { 257 pr_err("rxe creation allowed on top of a real device only\n"); 258 err = -EPERM; 259 goto err; 260 } 261 262 exists = rxe_get_dev_from_net(ndev); 263 if (exists) { 264 ib_device_put(&exists->ib_dev); 265 pr_err("already configured on %s\n", ndev->name); 266 err = -EEXIST; 267 goto err; 268 } 269 270 err = rxe_net_add(ibdev_name, ndev); 271 if (err) { 272 pr_err("failed to add %s\n", ndev->name); 273 goto err; 274 } 275 err: 276 return err; 277 } 278 279 static struct rdma_link_ops rxe_link_ops = { 280 .type = "rxe", 281 .newlink = rxe_newlink, 282 }; 283 284 static int __init rxe_module_init(void) 285 { 286 int err; 287 288 err = rxe_net_init(); 289 if (err) 290 return err; 291 292 rdma_link_register(&rxe_link_ops); 293 rxe_initialized = true; 294 pr_info("loaded\n"); 295 return 0; 296 } 297 298 static void __exit rxe_module_exit(void) 299 { 300 rdma_link_unregister(&rxe_link_ops); 301 ib_unregister_driver(RDMA_DRIVER_RXE); 302 rxe_net_exit(); 303 304 rxe_initialized = false; 305 pr_info("unloaded\n"); 306 } 307 308 late_initcall(rxe_module_init); 309 module_exit(rxe_module_exit); 310 311 MODULE_ALIAS_RDMA_LINK("rxe"); 312