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