1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <rdma/rdma_netlink.h> 35 #include <net/addrconf.h> 36 #include "rxe.h" 37 #include "rxe_loc.h" 38 39 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib"); 40 MODULE_DESCRIPTION("Soft RDMA transport"); 41 MODULE_LICENSE("Dual BSD/GPL"); 42 43 /* free resources for all ports on a device */ 44 static void rxe_cleanup_ports(struct rxe_dev *rxe) 45 { 46 kfree(rxe->port.pkey_tbl); 47 rxe->port.pkey_tbl = NULL; 48 49 } 50 51 /* free resources for a rxe device all objects created for this device must 52 * have been destroyed 53 */ 54 void rxe_dealloc(struct ib_device *ib_dev) 55 { 56 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev); 57 58 rxe_pool_cleanup(&rxe->uc_pool); 59 rxe_pool_cleanup(&rxe->pd_pool); 60 rxe_pool_cleanup(&rxe->ah_pool); 61 rxe_pool_cleanup(&rxe->srq_pool); 62 rxe_pool_cleanup(&rxe->qp_pool); 63 rxe_pool_cleanup(&rxe->cq_pool); 64 rxe_pool_cleanup(&rxe->mr_pool); 65 rxe_pool_cleanup(&rxe->mw_pool); 66 rxe_pool_cleanup(&rxe->mc_grp_pool); 67 rxe_pool_cleanup(&rxe->mc_elem_pool); 68 69 rxe_cleanup_ports(rxe); 70 71 if (rxe->tfm) 72 crypto_free_shash(rxe->tfm); 73 } 74 75 /* initialize rxe device parameters */ 76 static void rxe_init_device_param(struct rxe_dev *rxe) 77 { 78 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 79 80 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 81 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 82 rxe->attr.max_qp = RXE_MAX_QP; 83 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 84 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 85 rxe->attr.max_send_sge = RXE_MAX_SGE; 86 rxe->attr.max_recv_sge = RXE_MAX_SGE; 87 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 88 rxe->attr.max_cq = RXE_MAX_CQ; 89 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 90 rxe->attr.max_mr = RXE_MAX_MR; 91 rxe->attr.max_pd = RXE_MAX_PD; 92 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 93 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 94 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 95 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 96 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 97 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 98 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 99 rxe->attr.max_ah = RXE_MAX_AH; 100 rxe->attr.max_srq = RXE_MAX_SRQ; 101 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 102 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 103 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 104 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 105 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 106 107 rxe->max_ucontext = RXE_MAX_UCONTEXT; 108 } 109 110 /* initialize port attributes */ 111 static int rxe_init_port_param(struct rxe_port *port) 112 { 113 port->attr.state = IB_PORT_DOWN; 114 port->attr.max_mtu = IB_MTU_4096; 115 port->attr.active_mtu = IB_MTU_256; 116 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 117 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 118 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 119 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 120 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 121 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 122 port->attr.lid = RXE_PORT_LID; 123 port->attr.sm_lid = RXE_PORT_SM_LID; 124 port->attr.lmc = RXE_PORT_LMC; 125 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 126 port->attr.sm_sl = RXE_PORT_SM_SL; 127 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 128 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 129 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 130 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 131 port->attr.phys_state = RXE_PORT_PHYS_STATE; 132 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 133 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 134 135 return 0; 136 } 137 138 /* initialize port state, note IB convention that HCA ports are always 139 * numbered from 1 140 */ 141 static int rxe_init_ports(struct rxe_dev *rxe) 142 { 143 struct rxe_port *port = &rxe->port; 144 145 rxe_init_port_param(port); 146 147 if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len) 148 return -EINVAL; 149 150 port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len, 151 sizeof(*port->pkey_tbl), GFP_KERNEL); 152 153 if (!port->pkey_tbl) 154 return -ENOMEM; 155 156 port->pkey_tbl[0] = 0xffff; 157 addrconf_addr_eui48((unsigned char *)&port->port_guid, 158 rxe->ndev->dev_addr); 159 160 spin_lock_init(&port->port_lock); 161 162 return 0; 163 } 164 165 /* init pools of managed objects */ 166 static int rxe_init_pools(struct rxe_dev *rxe) 167 { 168 int err; 169 170 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 171 rxe->max_ucontext); 172 if (err) 173 goto err1; 174 175 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 176 rxe->attr.max_pd); 177 if (err) 178 goto err2; 179 180 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 181 rxe->attr.max_ah); 182 if (err) 183 goto err3; 184 185 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 186 rxe->attr.max_srq); 187 if (err) 188 goto err4; 189 190 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 191 rxe->attr.max_qp); 192 if (err) 193 goto err5; 194 195 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 196 rxe->attr.max_cq); 197 if (err) 198 goto err6; 199 200 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 201 rxe->attr.max_mr); 202 if (err) 203 goto err7; 204 205 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 206 rxe->attr.max_mw); 207 if (err) 208 goto err8; 209 210 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 211 rxe->attr.max_mcast_grp); 212 if (err) 213 goto err9; 214 215 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM, 216 rxe->attr.max_total_mcast_qp_attach); 217 if (err) 218 goto err10; 219 220 return 0; 221 222 err10: 223 rxe_pool_cleanup(&rxe->mc_grp_pool); 224 err9: 225 rxe_pool_cleanup(&rxe->mw_pool); 226 err8: 227 rxe_pool_cleanup(&rxe->mr_pool); 228 err7: 229 rxe_pool_cleanup(&rxe->cq_pool); 230 err6: 231 rxe_pool_cleanup(&rxe->qp_pool); 232 err5: 233 rxe_pool_cleanup(&rxe->srq_pool); 234 err4: 235 rxe_pool_cleanup(&rxe->ah_pool); 236 err3: 237 rxe_pool_cleanup(&rxe->pd_pool); 238 err2: 239 rxe_pool_cleanup(&rxe->uc_pool); 240 err1: 241 return err; 242 } 243 244 /* initialize rxe device state */ 245 static int rxe_init(struct rxe_dev *rxe) 246 { 247 int err; 248 249 /* init default device parameters */ 250 rxe_init_device_param(rxe); 251 252 err = rxe_init_ports(rxe); 253 if (err) 254 goto err1; 255 256 err = rxe_init_pools(rxe); 257 if (err) 258 goto err2; 259 260 /* init pending mmap list */ 261 spin_lock_init(&rxe->mmap_offset_lock); 262 spin_lock_init(&rxe->pending_lock); 263 INIT_LIST_HEAD(&rxe->pending_mmaps); 264 265 mutex_init(&rxe->usdev_lock); 266 267 return 0; 268 269 err2: 270 rxe_cleanup_ports(rxe); 271 err1: 272 return err; 273 } 274 275 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 276 { 277 struct rxe_port *port = &rxe->port; 278 enum ib_mtu mtu; 279 280 mtu = eth_mtu_int_to_enum(ndev_mtu); 281 282 /* Make sure that new MTU in range */ 283 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 284 285 port->attr.active_mtu = mtu; 286 port->mtu_cap = ib_mtu_enum_to_int(mtu); 287 } 288 289 /* called by ifc layer to create new rxe device. 290 * The caller should allocate memory for rxe by calling ib_alloc_device. 291 */ 292 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 293 { 294 int err; 295 296 err = rxe_init(rxe); 297 if (err) 298 return err; 299 300 rxe_set_mtu(rxe, mtu); 301 302 return rxe_register_device(rxe, ibdev_name); 303 } 304 305 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 306 { 307 struct rxe_dev *exists; 308 int err = 0; 309 310 exists = rxe_get_dev_from_net(ndev); 311 if (exists) { 312 ib_device_put(&exists->ib_dev); 313 pr_err("already configured on %s\n", ndev->name); 314 err = -EEXIST; 315 goto err; 316 } 317 318 err = rxe_net_add(ibdev_name, ndev); 319 if (err) { 320 pr_err("failed to add %s\n", ndev->name); 321 goto err; 322 } 323 err: 324 return err; 325 } 326 327 static struct rdma_link_ops rxe_link_ops = { 328 .type = "rxe", 329 .newlink = rxe_newlink, 330 }; 331 332 static int __init rxe_module_init(void) 333 { 334 int err; 335 336 /* initialize slab caches for managed objects */ 337 err = rxe_cache_init(); 338 if (err) { 339 pr_err("unable to init object pools\n"); 340 return err; 341 } 342 343 err = rxe_net_init(); 344 if (err) 345 return err; 346 347 rdma_link_register(&rxe_link_ops); 348 pr_info("loaded\n"); 349 return 0; 350 } 351 352 static void __exit rxe_module_exit(void) 353 { 354 rdma_link_unregister(&rxe_link_ops); 355 ib_unregister_driver(RDMA_DRIVER_RXE); 356 rxe_net_exit(); 357 rxe_cache_exit(); 358 359 pr_info("unloaded\n"); 360 } 361 362 late_initcall(rxe_module_init); 363 module_exit(rxe_module_exit); 364 365 MODULE_ALIAS_RDMA_LINK("rxe"); 366