linux/drivers/infiniband/sw/rxe/rxe.c
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   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
  39MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
  40MODULE_DESCRIPTION("Soft RDMA transport");
  41MODULE_LICENSE("Dual BSD/GPL");
  42
  43bool rxe_initialized;
  44
  45/* free resources for a rxe device all objects created for this device must
  46 * have been destroyed
  47 */
  48void rxe_dealloc(struct ib_device *ib_dev)
  49{
  50        struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
  51
  52        rxe_pool_cleanup(&rxe->uc_pool);
  53        rxe_pool_cleanup(&rxe->pd_pool);
  54        rxe_pool_cleanup(&rxe->ah_pool);
  55        rxe_pool_cleanup(&rxe->srq_pool);
  56        rxe_pool_cleanup(&rxe->qp_pool);
  57        rxe_pool_cleanup(&rxe->cq_pool);
  58        rxe_pool_cleanup(&rxe->mr_pool);
  59        rxe_pool_cleanup(&rxe->mw_pool);
  60        rxe_pool_cleanup(&rxe->mc_grp_pool);
  61        rxe_pool_cleanup(&rxe->mc_elem_pool);
  62
  63        if (rxe->tfm)
  64                crypto_free_shash(rxe->tfm);
  65}
  66
  67/* initialize rxe device parameters */
  68static void rxe_init_device_param(struct rxe_dev *rxe)
  69{
  70        rxe->max_inline_data                    = RXE_MAX_INLINE_DATA;
  71
  72        rxe->attr.vendor_id                     = RXE_VENDOR_ID;
  73        rxe->attr.max_mr_size                   = RXE_MAX_MR_SIZE;
  74        rxe->attr.page_size_cap                 = RXE_PAGE_SIZE_CAP;
  75        rxe->attr.max_qp                        = RXE_MAX_QP;
  76        rxe->attr.max_qp_wr                     = RXE_MAX_QP_WR;
  77        rxe->attr.device_cap_flags              = RXE_DEVICE_CAP_FLAGS;
  78        rxe->attr.max_send_sge                  = RXE_MAX_SGE;
  79        rxe->attr.max_recv_sge                  = RXE_MAX_SGE;
  80        rxe->attr.max_sge_rd                    = RXE_MAX_SGE_RD;
  81        rxe->attr.max_cq                        = RXE_MAX_CQ;
  82        rxe->attr.max_cqe                       = (1 << RXE_MAX_LOG_CQE) - 1;
  83        rxe->attr.max_mr                        = RXE_MAX_MR;
  84        rxe->attr.max_pd                        = RXE_MAX_PD;
  85        rxe->attr.max_qp_rd_atom                = RXE_MAX_QP_RD_ATOM;
  86        rxe->attr.max_res_rd_atom               = RXE_MAX_RES_RD_ATOM;
  87        rxe->attr.max_qp_init_rd_atom           = RXE_MAX_QP_INIT_RD_ATOM;
  88        rxe->attr.atomic_cap                    = IB_ATOMIC_HCA;
  89        rxe->attr.max_mcast_grp                 = RXE_MAX_MCAST_GRP;
  90        rxe->attr.max_mcast_qp_attach           = RXE_MAX_MCAST_QP_ATTACH;
  91        rxe->attr.max_total_mcast_qp_attach     = RXE_MAX_TOT_MCAST_QP_ATTACH;
  92        rxe->attr.max_ah                        = RXE_MAX_AH;
  93        rxe->attr.max_srq                       = RXE_MAX_SRQ;
  94        rxe->attr.max_srq_wr                    = RXE_MAX_SRQ_WR;
  95        rxe->attr.max_srq_sge                   = RXE_MAX_SRQ_SGE;
  96        rxe->attr.max_fast_reg_page_list_len    = RXE_MAX_FMR_PAGE_LIST_LEN;
  97        rxe->attr.max_pkeys                     = RXE_MAX_PKEYS;
  98        rxe->attr.local_ca_ack_delay            = RXE_LOCAL_CA_ACK_DELAY;
  99        addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
 100                        rxe->ndev->dev_addr);
 101
 102        rxe->max_ucontext                       = RXE_MAX_UCONTEXT;
 103}
 104
 105/* initialize port attributes */
 106static void rxe_init_port_param(struct rxe_port *port)
 107{
 108        port->attr.state                = IB_PORT_DOWN;
 109        port->attr.max_mtu              = IB_MTU_4096;
 110        port->attr.active_mtu           = IB_MTU_256;
 111        port->attr.gid_tbl_len          = RXE_PORT_GID_TBL_LEN;
 112        port->attr.port_cap_flags       = RXE_PORT_PORT_CAP_FLAGS;
 113        port->attr.max_msg_sz           = RXE_PORT_MAX_MSG_SZ;
 114        port->attr.bad_pkey_cntr        = RXE_PORT_BAD_PKEY_CNTR;
 115        port->attr.qkey_viol_cntr       = RXE_PORT_QKEY_VIOL_CNTR;
 116        port->attr.pkey_tbl_len         = RXE_PORT_PKEY_TBL_LEN;
 117        port->attr.lid                  = RXE_PORT_LID;
 118        port->attr.sm_lid               = RXE_PORT_SM_LID;
 119        port->attr.lmc                  = RXE_PORT_LMC;
 120        port->attr.max_vl_num           = RXE_PORT_MAX_VL_NUM;
 121        port->attr.sm_sl                = RXE_PORT_SM_SL;
 122        port->attr.subnet_timeout       = RXE_PORT_SUBNET_TIMEOUT;
 123        port->attr.init_type_reply      = RXE_PORT_INIT_TYPE_REPLY;
 124        port->attr.active_width         = RXE_PORT_ACTIVE_WIDTH;
 125        port->attr.active_speed         = RXE_PORT_ACTIVE_SPEED;
 126        port->attr.phys_state           = RXE_PORT_PHYS_STATE;
 127        port->mtu_cap                   = ib_mtu_enum_to_int(IB_MTU_256);
 128        port->subnet_prefix             = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
 129}
 130
 131/* initialize port state, note IB convention that HCA ports are always
 132 * numbered from 1
 133 */
 134static void rxe_init_ports(struct rxe_dev *rxe)
 135{
 136        struct rxe_port *port = &rxe->port;
 137
 138        rxe_init_port_param(port);
 139        addrconf_addr_eui48((unsigned char *)&port->port_guid,
 140                            rxe->ndev->dev_addr);
 141        spin_lock_init(&port->port_lock);
 142}
 143
 144/* init pools of managed objects */
 145static int rxe_init_pools(struct rxe_dev *rxe)
 146{
 147        int err;
 148
 149        err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
 150                            rxe->max_ucontext);
 151        if (err)
 152                goto err1;
 153
 154        err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
 155                            rxe->attr.max_pd);
 156        if (err)
 157                goto err2;
 158
 159        err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
 160                            rxe->attr.max_ah);
 161        if (err)
 162                goto err3;
 163
 164        err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
 165                            rxe->attr.max_srq);
 166        if (err)
 167                goto err4;
 168
 169        err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
 170                            rxe->attr.max_qp);
 171        if (err)
 172                goto err5;
 173
 174        err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
 175                            rxe->attr.max_cq);
 176        if (err)
 177                goto err6;
 178
 179        err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
 180                            rxe->attr.max_mr);
 181        if (err)
 182                goto err7;
 183
 184        err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
 185                            rxe->attr.max_mw);
 186        if (err)
 187                goto err8;
 188
 189        err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
 190                            rxe->attr.max_mcast_grp);
 191        if (err)
 192                goto err9;
 193
 194        err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
 195                            rxe->attr.max_total_mcast_qp_attach);
 196        if (err)
 197                goto err10;
 198
 199        return 0;
 200
 201err10:
 202        rxe_pool_cleanup(&rxe->mc_grp_pool);
 203err9:
 204        rxe_pool_cleanup(&rxe->mw_pool);
 205err8:
 206        rxe_pool_cleanup(&rxe->mr_pool);
 207err7:
 208        rxe_pool_cleanup(&rxe->cq_pool);
 209err6:
 210        rxe_pool_cleanup(&rxe->qp_pool);
 211err5:
 212        rxe_pool_cleanup(&rxe->srq_pool);
 213err4:
 214        rxe_pool_cleanup(&rxe->ah_pool);
 215err3:
 216        rxe_pool_cleanup(&rxe->pd_pool);
 217err2:
 218        rxe_pool_cleanup(&rxe->uc_pool);
 219err1:
 220        return err;
 221}
 222
 223/* initialize rxe device state */
 224static int rxe_init(struct rxe_dev *rxe)
 225{
 226        int err;
 227
 228        /* init default device parameters */
 229        rxe_init_device_param(rxe);
 230
 231        rxe_init_ports(rxe);
 232
 233        err = rxe_init_pools(rxe);
 234        if (err)
 235                return err;
 236
 237        /* init pending mmap list */
 238        spin_lock_init(&rxe->mmap_offset_lock);
 239        spin_lock_init(&rxe->pending_lock);
 240        INIT_LIST_HEAD(&rxe->pending_mmaps);
 241
 242        mutex_init(&rxe->usdev_lock);
 243
 244        return 0;
 245}
 246
 247void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
 248{
 249        struct rxe_port *port = &rxe->port;
 250        enum ib_mtu mtu;
 251
 252        mtu = eth_mtu_int_to_enum(ndev_mtu);
 253
 254        /* Make sure that new MTU in range */
 255        mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
 256
 257        port->attr.active_mtu = mtu;
 258        port->mtu_cap = ib_mtu_enum_to_int(mtu);
 259}
 260
 261/* called by ifc layer to create new rxe device.
 262 * The caller should allocate memory for rxe by calling ib_alloc_device.
 263 */
 264int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
 265{
 266        int err;
 267
 268        err = rxe_init(rxe);
 269        if (err)
 270                return err;
 271
 272        rxe_set_mtu(rxe, mtu);
 273
 274        return rxe_register_device(rxe, ibdev_name);
 275}
 276
 277static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
 278{
 279        struct rxe_dev *exists;
 280        int err = 0;
 281
 282        exists = rxe_get_dev_from_net(ndev);
 283        if (exists) {
 284                ib_device_put(&exists->ib_dev);
 285                pr_err("already configured on %s\n", ndev->name);
 286                err = -EEXIST;
 287                goto err;
 288        }
 289
 290        err = rxe_net_add(ibdev_name, ndev);
 291        if (err) {
 292                pr_err("failed to add %s\n", ndev->name);
 293                goto err;
 294        }
 295err:
 296        return err;
 297}
 298
 299static struct rdma_link_ops rxe_link_ops = {
 300        .type = "rxe",
 301        .newlink = rxe_newlink,
 302};
 303
 304static int __init rxe_module_init(void)
 305{
 306        int err;
 307
 308        /* initialize slab caches for managed objects */
 309        err = rxe_cache_init();
 310        if (err) {
 311                pr_err("unable to init object pools\n");
 312                return err;
 313        }
 314
 315        err = rxe_net_init();
 316        if (err)
 317                return err;
 318
 319        rdma_link_register(&rxe_link_ops);
 320        rxe_initialized = true;
 321        pr_info("loaded\n");
 322        return 0;
 323}
 324
 325static void __exit rxe_module_exit(void)
 326{
 327        rdma_link_unregister(&rxe_link_ops);
 328        ib_unregister_driver(RDMA_DRIVER_RXE);
 329        rxe_net_exit();
 330        rxe_cache_exit();
 331
 332        rxe_initialized = false;
 333        pr_info("unloaded\n");
 334}
 335
 336late_initcall(rxe_module_init);
 337module_exit(rxe_module_exit);
 338
 339MODULE_ALIAS_RDMA_LINK("rxe");
 340