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.fw_ver = RXE_FW_VER; 81 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 82 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 83 rxe->attr.vendor_id = RXE_VENDOR_ID; 84 rxe->attr.vendor_part_id = RXE_VENDOR_PART_ID; 85 rxe->attr.hw_ver = RXE_HW_VER; 86 rxe->attr.max_qp = RXE_MAX_QP; 87 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 88 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 89 rxe->attr.max_send_sge = RXE_MAX_SGE; 90 rxe->attr.max_recv_sge = RXE_MAX_SGE; 91 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 92 rxe->attr.max_cq = RXE_MAX_CQ; 93 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 94 rxe->attr.max_mr = RXE_MAX_MR; 95 rxe->attr.max_pd = RXE_MAX_PD; 96 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 97 rxe->attr.max_ee_rd_atom = RXE_MAX_EE_RD_ATOM; 98 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 99 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 100 rxe->attr.max_ee_init_rd_atom = RXE_MAX_EE_INIT_RD_ATOM; 101 rxe->attr.atomic_cap = IB_ATOMIC_HCA; 102 rxe->attr.max_ee = RXE_MAX_EE; 103 rxe->attr.max_rdd = RXE_MAX_RDD; 104 rxe->attr.max_mw = RXE_MAX_MW; 105 rxe->attr.max_raw_ipv6_qp = RXE_MAX_RAW_IPV6_QP; 106 rxe->attr.max_raw_ethy_qp = RXE_MAX_RAW_ETHY_QP; 107 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 108 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 109 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 110 rxe->attr.max_ah = RXE_MAX_AH; 111 rxe->attr.max_fmr = RXE_MAX_FMR; 112 rxe->attr.max_map_per_fmr = RXE_MAX_MAP_PER_FMR; 113 rxe->attr.max_srq = RXE_MAX_SRQ; 114 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 115 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 116 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 117 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 118 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 119 120 rxe->max_ucontext = RXE_MAX_UCONTEXT; 121 } 122 123 /* initialize port attributes */ 124 static int rxe_init_port_param(struct rxe_port *port) 125 { 126 port->attr.state = IB_PORT_DOWN; 127 port->attr.max_mtu = IB_MTU_4096; 128 port->attr.active_mtu = IB_MTU_256; 129 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 130 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 131 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 132 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 133 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 134 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 135 port->attr.lid = RXE_PORT_LID; 136 port->attr.sm_lid = RXE_PORT_SM_LID; 137 port->attr.lmc = RXE_PORT_LMC; 138 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 139 port->attr.sm_sl = RXE_PORT_SM_SL; 140 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 141 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 142 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 143 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 144 port->attr.phys_state = RXE_PORT_PHYS_STATE; 145 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256); 146 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 147 148 return 0; 149 } 150 151 /* initialize port state, note IB convention that HCA ports are always 152 * numbered from 1 153 */ 154 static int rxe_init_ports(struct rxe_dev *rxe) 155 { 156 struct rxe_port *port = &rxe->port; 157 158 rxe_init_port_param(port); 159 160 if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len) 161 return -EINVAL; 162 163 port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len, 164 sizeof(*port->pkey_tbl), GFP_KERNEL); 165 166 if (!port->pkey_tbl) 167 return -ENOMEM; 168 169 port->pkey_tbl[0] = 0xffff; 170 addrconf_addr_eui48((unsigned char *)&port->port_guid, 171 rxe->ndev->dev_addr); 172 173 spin_lock_init(&port->port_lock); 174 175 return 0; 176 } 177 178 /* init pools of managed objects */ 179 static int rxe_init_pools(struct rxe_dev *rxe) 180 { 181 int err; 182 183 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 184 rxe->max_ucontext); 185 if (err) 186 goto err1; 187 188 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 189 rxe->attr.max_pd); 190 if (err) 191 goto err2; 192 193 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 194 rxe->attr.max_ah); 195 if (err) 196 goto err3; 197 198 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 199 rxe->attr.max_srq); 200 if (err) 201 goto err4; 202 203 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 204 rxe->attr.max_qp); 205 if (err) 206 goto err5; 207 208 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 209 rxe->attr.max_cq); 210 if (err) 211 goto err6; 212 213 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 214 rxe->attr.max_mr); 215 if (err) 216 goto err7; 217 218 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 219 rxe->attr.max_mw); 220 if (err) 221 goto err8; 222 223 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 224 rxe->attr.max_mcast_grp); 225 if (err) 226 goto err9; 227 228 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM, 229 rxe->attr.max_total_mcast_qp_attach); 230 if (err) 231 goto err10; 232 233 return 0; 234 235 err10: 236 rxe_pool_cleanup(&rxe->mc_grp_pool); 237 err9: 238 rxe_pool_cleanup(&rxe->mw_pool); 239 err8: 240 rxe_pool_cleanup(&rxe->mr_pool); 241 err7: 242 rxe_pool_cleanup(&rxe->cq_pool); 243 err6: 244 rxe_pool_cleanup(&rxe->qp_pool); 245 err5: 246 rxe_pool_cleanup(&rxe->srq_pool); 247 err4: 248 rxe_pool_cleanup(&rxe->ah_pool); 249 err3: 250 rxe_pool_cleanup(&rxe->pd_pool); 251 err2: 252 rxe_pool_cleanup(&rxe->uc_pool); 253 err1: 254 return err; 255 } 256 257 /* initialize rxe device state */ 258 static int rxe_init(struct rxe_dev *rxe) 259 { 260 int err; 261 262 /* init default device parameters */ 263 rxe_init_device_param(rxe); 264 265 err = rxe_init_ports(rxe); 266 if (err) 267 goto err1; 268 269 err = rxe_init_pools(rxe); 270 if (err) 271 goto err2; 272 273 /* init pending mmap list */ 274 spin_lock_init(&rxe->mmap_offset_lock); 275 spin_lock_init(&rxe->pending_lock); 276 INIT_LIST_HEAD(&rxe->pending_mmaps); 277 278 mutex_init(&rxe->usdev_lock); 279 280 return 0; 281 282 err2: 283 rxe_cleanup_ports(rxe); 284 err1: 285 return err; 286 } 287 288 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 289 { 290 struct rxe_port *port = &rxe->port; 291 enum ib_mtu mtu; 292 293 mtu = eth_mtu_int_to_enum(ndev_mtu); 294 295 /* Make sure that new MTU in range */ 296 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256; 297 298 port->attr.active_mtu = mtu; 299 port->mtu_cap = ib_mtu_enum_to_int(mtu); 300 } 301 302 /* called by ifc layer to create new rxe device. 303 * The caller should allocate memory for rxe by calling ib_alloc_device. 304 */ 305 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name) 306 { 307 int err; 308 309 err = rxe_init(rxe); 310 if (err) 311 return err; 312 313 rxe_set_mtu(rxe, mtu); 314 315 return rxe_register_device(rxe, ibdev_name); 316 } 317 318 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev) 319 { 320 struct rxe_dev *exists; 321 int err = 0; 322 323 exists = rxe_get_dev_from_net(ndev); 324 if (exists) { 325 ib_device_put(&exists->ib_dev); 326 pr_err("already configured on %s\n", ndev->name); 327 err = -EEXIST; 328 goto err; 329 } 330 331 err = rxe_net_add(ibdev_name, ndev); 332 if (err) { 333 pr_err("failed to add %s\n", ndev->name); 334 goto err; 335 } 336 err: 337 return err; 338 } 339 340 static struct rdma_link_ops rxe_link_ops = { 341 .type = "rxe", 342 .newlink = rxe_newlink, 343 }; 344 345 static int __init rxe_module_init(void) 346 { 347 int err; 348 349 /* initialize slab caches for managed objects */ 350 err = rxe_cache_init(); 351 if (err) { 352 pr_err("unable to init object pools\n"); 353 return err; 354 } 355 356 err = rxe_net_init(); 357 if (err) 358 return err; 359 360 rdma_link_register(&rxe_link_ops); 361 pr_info("loaded\n"); 362 return 0; 363 } 364 365 static void __exit rxe_module_exit(void) 366 { 367 rdma_link_unregister(&rxe_link_ops); 368 ib_unregister_driver(RDMA_DRIVER_RXE); 369 rxe_net_exit(); 370 rxe_cache_exit(); 371 372 pr_info("unloaded\n"); 373 } 374 375 late_initcall(rxe_module_init); 376 module_exit(rxe_module_exit); 377 378 MODULE_ALIAS_RDMA_LINK("rxe"); 379