drivers/infiniband/sw/rxe/rxe.c

   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 <net/addrconf.h>
  35 #include "rxe.h"
  36 #include "rxe_loc.h"
  37
  38 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
  39 MODULE_DESCRIPTION("Soft RDMA transport");
  40 MODULE_LICENSE("Dual BSD/GPL");
  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         crypto_free_shash(rxe->tfm);
  69 }
  70
  71 /* called when all references have been dropped */
  72 void rxe_release(struct kref *kref)
  73 {
  74         struct rxe_dev *rxe = container_of(kref, struct rxe_dev, ref_cnt);
  75
  76         rxe_cleanup(rxe);
  77         ib_dealloc_device(&rxe->ib_dev);
  78 }
  79
  80 void rxe_dev_put(struct rxe_dev *rxe)
  81 {
  82         kref_put(&rxe->ref_cnt, rxe_release);
  83 }
  84 EXPORT_SYMBOL_GPL(rxe_dev_put);
  85
  86 /* initialize rxe device parameters */
  87 static int rxe_init_device_param(struct rxe_dev *rxe)
  88 {
  89         rxe->max_inline_data                    = RXE_MAX_INLINE_DATA;
  90
  91         rxe->attr.fw_ver                        = RXE_FW_VER;
  92         rxe->attr.max_mr_size                   = RXE_MAX_MR_SIZE;
  93         rxe->attr.page_size_cap                 = RXE_PAGE_SIZE_CAP;
  94         rxe->attr.vendor_id                     = RXE_VENDOR_ID;
  95         rxe->attr.vendor_part_id                = RXE_VENDOR_PART_ID;
  96         rxe->attr.hw_ver                        = RXE_HW_VER;
  97         rxe->attr.max_qp                        = RXE_MAX_QP;
  98         rxe->attr.max_qp_wr                     = RXE_MAX_QP_WR;
  99         rxe->attr.device_cap_flags              = RXE_DEVICE_CAP_FLAGS;
 100         rxe->attr.max_sge                       = RXE_MAX_SGE;
 101         rxe->attr.max_sge_rd                    = RXE_MAX_SGE_RD;
 102         rxe->attr.max_cq                        = RXE_MAX_CQ;
 103         rxe->attr.max_cqe                       = (1 << RXE_MAX_LOG_CQE) - 1;
 104         rxe->attr.max_mr                        = RXE_MAX_MR;
 105         rxe->attr.max_pd                        = RXE_MAX_PD;
 106         rxe->attr.max_qp_rd_atom                = RXE_MAX_QP_RD_ATOM;
 107         rxe->attr.max_ee_rd_atom                = RXE_MAX_EE_RD_ATOM;
 108         rxe->attr.max_res_rd_atom               = RXE_MAX_RES_RD_ATOM;
 109         rxe->attr.max_qp_init_rd_atom           = RXE_MAX_QP_INIT_RD_ATOM;
 110         rxe->attr.max_ee_init_rd_atom           = RXE_MAX_EE_INIT_RD_ATOM;
 111         rxe->attr.atomic_cap                    = RXE_ATOMIC_CAP;
 112         rxe->attr.max_ee                        = RXE_MAX_EE;
 113         rxe->attr.max_rdd                       = RXE_MAX_RDD;
 114         rxe->attr.max_mw                        = RXE_MAX_MW;
 115         rxe->attr.max_raw_ipv6_qp               = RXE_MAX_RAW_IPV6_QP;
 116         rxe->attr.max_raw_ethy_qp               = RXE_MAX_RAW_ETHY_QP;
 117         rxe->attr.max_mcast_grp                 = RXE_MAX_MCAST_GRP;
 118         rxe->attr.max_mcast_qp_attach           = RXE_MAX_MCAST_QP_ATTACH;
 119         rxe->attr.max_total_mcast_qp_attach     = RXE_MAX_TOT_MCAST_QP_ATTACH;
 120         rxe->attr.max_ah                        = RXE_MAX_AH;
 121         rxe->attr.max_fmr                       = RXE_MAX_FMR;
 122         rxe->attr.max_map_per_fmr               = RXE_MAX_MAP_PER_FMR;
 123         rxe->attr.max_srq                       = RXE_MAX_SRQ;
 124         rxe->attr.max_srq_wr                    = RXE_MAX_SRQ_WR;
 125         rxe->attr.max_srq_sge                   = RXE_MAX_SRQ_SGE;
 126         rxe->attr.max_fast_reg_page_list_len    = RXE_MAX_FMR_PAGE_LIST_LEN;
 127         rxe->attr.max_pkeys                     = RXE_MAX_PKEYS;
 128         rxe->attr.local_ca_ack_delay            = RXE_LOCAL_CA_ACK_DELAY;
 129
 130         rxe->max_ucontext                       = RXE_MAX_UCONTEXT;
 131
 132         return 0;
 133 }
 134
 135 /* initialize port attributes */
 136 static int rxe_init_port_param(struct rxe_port *port)
 137 {
 138         port->attr.state                = RXE_PORT_STATE;
 139         port->attr.max_mtu              = RXE_PORT_MAX_MTU;
 140         port->attr.active_mtu           = RXE_PORT_ACTIVE_MTU;
 141         port->attr.gid_tbl_len          = RXE_PORT_GID_TBL_LEN;
 142         port->attr.port_cap_flags       = RXE_PORT_PORT_CAP_FLAGS;
 143         port->attr.max_msg_sz           = RXE_PORT_MAX_MSG_SZ;
 144         port->attr.bad_pkey_cntr        = RXE_PORT_BAD_PKEY_CNTR;
 145         port->attr.qkey_viol_cntr       = RXE_PORT_QKEY_VIOL_CNTR;
 146         port->attr.pkey_tbl_len         = RXE_PORT_PKEY_TBL_LEN;
 147         port->attr.lid                  = RXE_PORT_LID;
 148         port->attr.sm_lid               = RXE_PORT_SM_LID;
 149         port->attr.lmc                  = RXE_PORT_LMC;
 150         port->attr.max_vl_num           = RXE_PORT_MAX_VL_NUM;
 151         port->attr.sm_sl                = RXE_PORT_SM_SL;
 152         port->attr.subnet_timeout       = RXE_PORT_SUBNET_TIMEOUT;
 153         port->attr.init_type_reply      = RXE_PORT_INIT_TYPE_REPLY;
 154         port->attr.active_width         = RXE_PORT_ACTIVE_WIDTH;
 155         port->attr.active_speed         = RXE_PORT_ACTIVE_SPEED;
 156         port->attr.phys_state           = RXE_PORT_PHYS_STATE;
 157         port->mtu_cap                   =
 158                                 ib_mtu_enum_to_int(RXE_PORT_ACTIVE_MTU);
 159         port->subnet_prefix             = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
 160
 161         return 0;
 162 }
 163
 164 /* initialize port state, note IB convention that HCA ports are always
 165  * numbered from 1
 166  */
 167 static int rxe_init_ports(struct rxe_dev *rxe)
 168 {
 169         struct rxe_port *port = &rxe->port;
 170
 171         rxe_init_port_param(port);
 172
 173         if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len)
 174                 return -EINVAL;
 175
 176         port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len,
 177                         sizeof(*port->pkey_tbl), GFP_KERNEL);
 178
 179         if (!port->pkey_tbl)
 180                 return -ENOMEM;
 181
 182         port->pkey_tbl[0] = 0xffff;
 183         addrconf_addr_eui48((unsigned char *)&port->port_guid,
 184                             rxe->ndev->dev_addr);
 185
 186         spin_lock_init(&port->port_lock);
 187
 188         return 0;
 189 }
 190
 191 /* init pools of managed objects */
 192 static int rxe_init_pools(struct rxe_dev *rxe)
 193 {
 194         int err;
 195
 196         err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
 197                             rxe->max_ucontext);
 198         if (err)
 199                 goto err1;
 200
 201         err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
 202                             rxe->attr.max_pd);
 203         if (err)
 204                 goto err2;
 205
 206         err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
 207                             rxe->attr.max_ah);
 208         if (err)
 209                 goto err3;
 210
 211         err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
 212                             rxe->attr.max_srq);
 213         if (err)
 214                 goto err4;
 215
 216         err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
 217                             rxe->attr.max_qp);
 218         if (err)
 219                 goto err5;
 220
 221         err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
 222                             rxe->attr.max_cq);
 223         if (err)
 224                 goto err6;
 225
 226         err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
 227                             rxe->attr.max_mr);
 228         if (err)
 229                 goto err7;
 230
 231         err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
 232                             rxe->attr.max_mw);
 233         if (err)
 234                 goto err8;
 235
 236         err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
 237                             rxe->attr.max_mcast_grp);
 238         if (err)
 239                 goto err9;
 240
 241         err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
 242                             rxe->attr.max_total_mcast_qp_attach);
 243         if (err)
 244                 goto err10;
 245
 246         return 0;
 247
 248 err10:
 249         rxe_pool_cleanup(&rxe->mc_grp_pool);
 250 err9:
 251         rxe_pool_cleanup(&rxe->mw_pool);
 252 err8:
 253         rxe_pool_cleanup(&rxe->mr_pool);
 254 err7:
 255         rxe_pool_cleanup(&rxe->cq_pool);
 256 err6:
 257         rxe_pool_cleanup(&rxe->qp_pool);
 258 err5:
 259         rxe_pool_cleanup(&rxe->srq_pool);
 260 err4:
 261         rxe_pool_cleanup(&rxe->ah_pool);
 262 err3:
 263         rxe_pool_cleanup(&rxe->pd_pool);
 264 err2:
 265         rxe_pool_cleanup(&rxe->uc_pool);
 266 err1:
 267         return err;
 268 }
 269
 270 /* initialize rxe device state */
 271 static int rxe_init(struct rxe_dev *rxe)
 272 {
 273         int err;
 274
 275         /* init default device parameters */
 276         rxe_init_device_param(rxe);
 277
 278         err = rxe_init_ports(rxe);
 279         if (err)
 280                 goto err1;
 281
 282         err = rxe_init_pools(rxe);
 283         if (err)
 284                 goto err2;
 285
 286         /* init pending mmap list */
 287         spin_lock_init(&rxe->mmap_offset_lock);
 288         spin_lock_init(&rxe->pending_lock);
 289         INIT_LIST_HEAD(&rxe->pending_mmaps);
 290         INIT_LIST_HEAD(&rxe->list);
 291
 292         mutex_init(&rxe->usdev_lock);
 293
 294         return 0;
 295
 296 err2:
 297         rxe_cleanup_ports(rxe);
 298 err1:
 299         return err;
 300 }
 301
 302 int rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
 303 {
 304         struct rxe_port *port = &rxe->port;
 305         enum ib_mtu mtu;
 306
 307         mtu = eth_mtu_int_to_enum(ndev_mtu);
 308
 309         /* Make sure that new MTU in range */
 310         mtu = mtu ? min_t(enum ib_mtu, mtu, RXE_PORT_MAX_MTU) : IB_MTU_256;
 311
 312         port->attr.active_mtu = mtu;
 313         port->mtu_cap = ib_mtu_enum_to_int(mtu);
 314
 315         return 0;
 316 }
 317 EXPORT_SYMBOL(rxe_set_mtu);
 318
 319 /* called by ifc layer to create new rxe device.
 320  * The caller should allocate memory for rxe by calling ib_alloc_device.
 321  */
 322 int rxe_add(struct rxe_dev *rxe, unsigned int mtu)
 323 {
 324         int err;
 325
 326         kref_init(&rxe->ref_cnt);
 327
 328         err = rxe_init(rxe);
 329         if (err)
 330                 goto err1;
 331
 332         err = rxe_set_mtu(rxe, mtu);
 333         if (err)
 334                 goto err1;
 335
 336         err = rxe_register_device(rxe);
 337         if (err)
 338                 goto err1;
 339
 340         return 0;
 341
 342 err1:
 343         rxe_dev_put(rxe);
 344         return err;
 345 }
 346 EXPORT_SYMBOL(rxe_add);
 347
 348 /* called by the ifc layer to remove a device */
 349 void rxe_remove(struct rxe_dev *rxe)
 350 {
 351         rxe_unregister_device(rxe);
 352
 353         rxe_dev_put(rxe);
 354 }
 355 EXPORT_SYMBOL(rxe_remove);
 356
 357 static int __init rxe_module_init(void)
 358 {
 359         int err;
 360
 361         /* initialize slab caches for managed objects */
 362         err = rxe_cache_init();
 363         if (err) {
 364                 pr_err("unable to init object pools\n");
 365                 return err;
 366         }
 367
 368         err = rxe_net_init();
 369         if (err)
 370                 return err;
 371
 372         pr_info("loaded\n");
 373         return 0;
 374 }
 375
 376 static void __exit rxe_module_exit(void)
 377 {
 378         rxe_remove_all();
 379         rxe_net_exit();
 380         rxe_cache_exit();
 381
 382         pr_info("unloaded\n");
 383 }
 384
 385 late_initcall(rxe_module_init);
 386 module_exit(rxe_module_exit);