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 "rxe.h" 35 #include "rxe_loc.h" 36 37 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib"); 38 MODULE_DESCRIPTION("Soft RDMA transport"); 39 MODULE_LICENSE("Dual BSD/GPL"); 40 MODULE_VERSION("0.2"); 41 42 /* free resources for all ports on a device */ 43 static void rxe_cleanup_ports(struct rxe_dev *rxe) 44 { 45 kfree(rxe->port.pkey_tbl); 46 rxe->port.pkey_tbl = NULL; 47 48 } 49 50 /* free resources for a rxe device all objects created for this device must 51 * have been destroyed 52 */ 53 static void rxe_cleanup(struct rxe_dev *rxe) 54 { 55 rxe_pool_cleanup(&rxe->uc_pool); 56 rxe_pool_cleanup(&rxe->pd_pool); 57 rxe_pool_cleanup(&rxe->ah_pool); 58 rxe_pool_cleanup(&rxe->srq_pool); 59 rxe_pool_cleanup(&rxe->qp_pool); 60 rxe_pool_cleanup(&rxe->cq_pool); 61 rxe_pool_cleanup(&rxe->mr_pool); 62 rxe_pool_cleanup(&rxe->mw_pool); 63 rxe_pool_cleanup(&rxe->mc_grp_pool); 64 rxe_pool_cleanup(&rxe->mc_elem_pool); 65 66 rxe_cleanup_ports(rxe); 67 } 68 69 /* called when all references have been dropped */ 70 void rxe_release(struct kref *kref) 71 { 72 struct rxe_dev *rxe = container_of(kref, struct rxe_dev, ref_cnt); 73 74 rxe_cleanup(rxe); 75 ib_dealloc_device(&rxe->ib_dev); 76 } 77 78 void rxe_dev_put(struct rxe_dev *rxe) 79 { 80 kref_put(&rxe->ref_cnt, rxe_release); 81 } 82 EXPORT_SYMBOL_GPL(rxe_dev_put); 83 84 /* initialize rxe device parameters */ 85 static int rxe_init_device_param(struct rxe_dev *rxe) 86 { 87 rxe->max_inline_data = RXE_MAX_INLINE_DATA; 88 89 rxe->attr.fw_ver = RXE_FW_VER; 90 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE; 91 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP; 92 rxe->attr.vendor_id = RXE_VENDOR_ID; 93 rxe->attr.vendor_part_id = RXE_VENDOR_PART_ID; 94 rxe->attr.hw_ver = RXE_HW_VER; 95 rxe->attr.max_qp = RXE_MAX_QP; 96 rxe->attr.max_qp_wr = RXE_MAX_QP_WR; 97 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS; 98 rxe->attr.max_sge = RXE_MAX_SGE; 99 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD; 100 rxe->attr.max_cq = RXE_MAX_CQ; 101 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1; 102 rxe->attr.max_mr = RXE_MAX_MR; 103 rxe->attr.max_pd = RXE_MAX_PD; 104 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM; 105 rxe->attr.max_ee_rd_atom = RXE_MAX_EE_RD_ATOM; 106 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM; 107 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM; 108 rxe->attr.max_ee_init_rd_atom = RXE_MAX_EE_INIT_RD_ATOM; 109 rxe->attr.atomic_cap = RXE_ATOMIC_CAP; 110 rxe->attr.max_ee = RXE_MAX_EE; 111 rxe->attr.max_rdd = RXE_MAX_RDD; 112 rxe->attr.max_mw = RXE_MAX_MW; 113 rxe->attr.max_raw_ipv6_qp = RXE_MAX_RAW_IPV6_QP; 114 rxe->attr.max_raw_ethy_qp = RXE_MAX_RAW_ETHY_QP; 115 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP; 116 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH; 117 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH; 118 rxe->attr.max_ah = RXE_MAX_AH; 119 rxe->attr.max_fmr = RXE_MAX_FMR; 120 rxe->attr.max_map_per_fmr = RXE_MAX_MAP_PER_FMR; 121 rxe->attr.max_srq = RXE_MAX_SRQ; 122 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR; 123 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE; 124 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN; 125 rxe->attr.max_pkeys = RXE_MAX_PKEYS; 126 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY; 127 128 rxe->max_ucontext = RXE_MAX_UCONTEXT; 129 130 return 0; 131 } 132 133 /* initialize port attributes */ 134 static int rxe_init_port_param(struct rxe_port *port) 135 { 136 port->attr.state = RXE_PORT_STATE; 137 port->attr.max_mtu = RXE_PORT_MAX_MTU; 138 port->attr.active_mtu = RXE_PORT_ACTIVE_MTU; 139 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN; 140 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS; 141 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ; 142 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR; 143 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR; 144 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN; 145 port->attr.lid = RXE_PORT_LID; 146 port->attr.sm_lid = RXE_PORT_SM_LID; 147 port->attr.lmc = RXE_PORT_LMC; 148 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM; 149 port->attr.sm_sl = RXE_PORT_SM_SL; 150 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT; 151 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY; 152 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH; 153 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED; 154 port->attr.phys_state = RXE_PORT_PHYS_STATE; 155 port->mtu_cap = 156 ib_mtu_enum_to_int(RXE_PORT_ACTIVE_MTU); 157 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX); 158 159 return 0; 160 } 161 162 /* initialize port state, note IB convention that HCA ports are always 163 * numbered from 1 164 */ 165 static int rxe_init_ports(struct rxe_dev *rxe) 166 { 167 struct rxe_port *port = &rxe->port; 168 169 rxe_init_port_param(port); 170 171 if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len) 172 return -EINVAL; 173 174 port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len, 175 sizeof(*port->pkey_tbl), GFP_KERNEL); 176 177 if (!port->pkey_tbl) 178 return -ENOMEM; 179 180 port->pkey_tbl[0] = 0xffff; 181 port->port_guid = rxe_port_guid(rxe); 182 183 spin_lock_init(&port->port_lock); 184 185 return 0; 186 } 187 188 /* init pools of managed objects */ 189 static int rxe_init_pools(struct rxe_dev *rxe) 190 { 191 int err; 192 193 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC, 194 rxe->max_ucontext); 195 if (err) 196 goto err1; 197 198 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD, 199 rxe->attr.max_pd); 200 if (err) 201 goto err2; 202 203 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH, 204 rxe->attr.max_ah); 205 if (err) 206 goto err3; 207 208 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ, 209 rxe->attr.max_srq); 210 if (err) 211 goto err4; 212 213 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP, 214 rxe->attr.max_qp); 215 if (err) 216 goto err5; 217 218 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ, 219 rxe->attr.max_cq); 220 if (err) 221 goto err6; 222 223 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR, 224 rxe->attr.max_mr); 225 if (err) 226 goto err7; 227 228 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW, 229 rxe->attr.max_mw); 230 if (err) 231 goto err8; 232 233 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP, 234 rxe->attr.max_mcast_grp); 235 if (err) 236 goto err9; 237 238 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM, 239 rxe->attr.max_total_mcast_qp_attach); 240 if (err) 241 goto err10; 242 243 return 0; 244 245 err10: 246 rxe_pool_cleanup(&rxe->mc_grp_pool); 247 err9: 248 rxe_pool_cleanup(&rxe->mw_pool); 249 err8: 250 rxe_pool_cleanup(&rxe->mr_pool); 251 err7: 252 rxe_pool_cleanup(&rxe->cq_pool); 253 err6: 254 rxe_pool_cleanup(&rxe->qp_pool); 255 err5: 256 rxe_pool_cleanup(&rxe->srq_pool); 257 err4: 258 rxe_pool_cleanup(&rxe->ah_pool); 259 err3: 260 rxe_pool_cleanup(&rxe->pd_pool); 261 err2: 262 rxe_pool_cleanup(&rxe->uc_pool); 263 err1: 264 return err; 265 } 266 267 /* initialize rxe device state */ 268 static int rxe_init(struct rxe_dev *rxe) 269 { 270 int err; 271 272 /* init default device parameters */ 273 rxe_init_device_param(rxe); 274 275 err = rxe_init_ports(rxe); 276 if (err) 277 goto err1; 278 279 err = rxe_init_pools(rxe); 280 if (err) 281 goto err2; 282 283 /* init pending mmap list */ 284 spin_lock_init(&rxe->mmap_offset_lock); 285 spin_lock_init(&rxe->pending_lock); 286 INIT_LIST_HEAD(&rxe->pending_mmaps); 287 INIT_LIST_HEAD(&rxe->list); 288 289 mutex_init(&rxe->usdev_lock); 290 291 return 0; 292 293 err2: 294 rxe_cleanup_ports(rxe); 295 err1: 296 return err; 297 } 298 299 int rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu) 300 { 301 struct rxe_port *port = &rxe->port; 302 enum ib_mtu mtu; 303 304 mtu = eth_mtu_int_to_enum(ndev_mtu); 305 306 /* Make sure that new MTU in range */ 307 mtu = mtu ? min_t(enum ib_mtu, mtu, RXE_PORT_MAX_MTU) : IB_MTU_256; 308 309 port->attr.active_mtu = mtu; 310 port->mtu_cap = ib_mtu_enum_to_int(mtu); 311 312 return 0; 313 } 314 EXPORT_SYMBOL(rxe_set_mtu); 315 316 /* called by ifc layer to create new rxe device. 317 * The caller should allocate memory for rxe by calling ib_alloc_device. 318 */ 319 int rxe_add(struct rxe_dev *rxe, unsigned int mtu) 320 { 321 int err; 322 323 kref_init(&rxe->ref_cnt); 324 325 err = rxe_init(rxe); 326 if (err) 327 goto err1; 328 329 err = rxe_set_mtu(rxe, mtu); 330 if (err) 331 goto err1; 332 333 err = rxe_register_device(rxe); 334 if (err) 335 goto err1; 336 337 return 0; 338 339 err1: 340 rxe_dev_put(rxe); 341 return err; 342 } 343 EXPORT_SYMBOL(rxe_add); 344 345 /* called by the ifc layer to remove a device */ 346 void rxe_remove(struct rxe_dev *rxe) 347 { 348 rxe_unregister_device(rxe); 349 350 rxe_dev_put(rxe); 351 } 352 EXPORT_SYMBOL(rxe_remove); 353 354 static int __init rxe_module_init(void) 355 { 356 int err; 357 358 /* initialize slab caches for managed objects */ 359 err = rxe_cache_init(); 360 if (err) { 361 pr_err("unable to init object pools\n"); 362 return err; 363 } 364 365 err = rxe_net_init(); 366 if (err) 367 return err; 368 369 pr_info("loaded\n"); 370 return 0; 371 } 372 373 static void __exit rxe_module_exit(void) 374 { 375 rxe_remove_all(); 376 rxe_net_exit(); 377 rxe_cache_exit(); 378 379 pr_info("unloaded\n"); 380 } 381 382 late_initcall(rxe_module_init); 383 module_exit(rxe_module_exit); 384