LXR linux/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
  38MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
  39MODULE_DESCRIPTION("Soft RDMA transport");
  40MODULE_LICENSE("Dual BSD/GPL");
  41
  42/* free resources for all ports on a device */
  43static 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 */
  53static 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 */
  72void 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 */
  81static void 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
 127/* initialize port attributes */
 128static int rxe_init_port_param(struct rxe_port *port)
 129{
 130        port->attr.state                = RXE_PORT_STATE;
 131        port->attr.max_mtu              = RXE_PORT_MAX_MTU;
 132        port->attr.active_mtu           = RXE_PORT_ACTIVE_MTU;
 133        port->attr.gid_tbl_len          = RXE_PORT_GID_TBL_LEN;
 134        port->attr.port_cap_flags       = RXE_PORT_PORT_CAP_FLAGS;
 135        port->attr.max_msg_sz           = RXE_PORT_MAX_MSG_SZ;
 136        port->attr.bad_pkey_cntr        = RXE_PORT_BAD_PKEY_CNTR;
 137        port->attr.qkey_viol_cntr       = RXE_PORT_QKEY_VIOL_CNTR;
 138        port->attr.pkey_tbl_len         = RXE_PORT_PKEY_TBL_LEN;
 139        port->attr.lid                  = RXE_PORT_LID;
 140        port->attr.sm_lid               = RXE_PORT_SM_LID;
 141        port->attr.lmc                  = RXE_PORT_LMC;
 142        port->attr.max_vl_num           = RXE_PORT_MAX_VL_NUM;
 143        port->attr.sm_sl                = RXE_PORT_SM_SL;
 144        port->attr.subnet_timeout       = RXE_PORT_SUBNET_TIMEOUT;
 145        port->attr.init_type_reply      = RXE_PORT_INIT_TYPE_REPLY;
 146        port->attr.active_width         = RXE_PORT_ACTIVE_WIDTH;
 147        port->attr.active_speed         = RXE_PORT_ACTIVE_SPEED;
 148        port->attr.phys_state           = RXE_PORT_PHYS_STATE;
 149        port->mtu_cap                   =
 150                                ib_mtu_enum_to_int(RXE_PORT_ACTIVE_MTU);
 151        port->subnet_prefix             = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
 152
 153        return 0;
 154}
 155
 156/* initialize port state, note IB convention that HCA ports are always
 157 * numbered from 1
 158 */
 159static int rxe_init_ports(struct rxe_dev *rxe)
 160{
 161        struct rxe_port *port = &rxe->port;
 162
 163        rxe_init_port_param(port);
 164
 165        if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len)
 166                return -EINVAL;
 167
 168        port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len,
 169                        sizeof(*port->pkey_tbl), GFP_KERNEL);
 170
 171        if (!port->pkey_tbl)
 172                return -ENOMEM;
 173
 174        port->pkey_tbl[0] = 0xffff;
 175        addrconf_addr_eui48((unsigned char *)&port->port_guid,
 176                            rxe->ndev->dev_addr);
 177
 178        spin_lock_init(&port->port_lock);
 179
 180        return 0;
 181}
 182
 183/* init pools of managed objects */
 184static int rxe_init_pools(struct rxe_dev *rxe)
 185{
 186        int err;
 187
 188        err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
 189                            rxe->max_ucontext);
 190        if (err)
 191                goto err1;
 192
 193        err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
 194                            rxe->attr.max_pd);
 195        if (err)
 196                goto err2;
 197
 198        err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
 199                            rxe->attr.max_ah);
 200        if (err)
 201                goto err3;
 202
 203        err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
 204                            rxe->attr.max_srq);
 205        if (err)
 206                goto err4;
 207
 208        err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
 209                            rxe->attr.max_qp);
 210        if (err)
 211                goto err5;
 212
 213        err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
 214                            rxe->attr.max_cq);
 215        if (err)
 216                goto err6;
 217
 218        err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
 219                            rxe->attr.max_mr);
 220        if (err)
 221                goto err7;
 222
 223        err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
 224                            rxe->attr.max_mw);
 225        if (err)
 226                goto err8;
 227
 228        err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
 229                            rxe->attr.max_mcast_grp);
 230        if (err)
 231                goto err9;
 232
 233        err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
 234                            rxe->attr.max_total_mcast_qp_attach);
 235        if (err)
 236                goto err10;
 237
 238        return 0;
 239
 240err10:
 241        rxe_pool_cleanup(&rxe->mc_grp_pool);
 242err9:
 243        rxe_pool_cleanup(&rxe->mw_pool);
 244err8:
 245        rxe_pool_cleanup(&rxe->mr_pool);
 246err7:
 247        rxe_pool_cleanup(&rxe->cq_pool);
 248err6:
 249        rxe_pool_cleanup(&rxe->qp_pool);
 250err5:
 251        rxe_pool_cleanup(&rxe->srq_pool);
 252err4:
 253        rxe_pool_cleanup(&rxe->ah_pool);
 254err3:
 255        rxe_pool_cleanup(&rxe->pd_pool);
 256err2:
 257        rxe_pool_cleanup(&rxe->uc_pool);
 258err1:
 259        return err;
 260}
 261
 262/* initialize rxe device state */
 263static int rxe_init(struct rxe_dev *rxe)
 264{
 265        int err;
 266
 267        /* init default device parameters */
 268        rxe_init_device_param(rxe);
 269
 270        err = rxe_init_ports(rxe);
 271        if (err)
 272                goto err1;
 273
 274        err = rxe_init_pools(rxe);
 275        if (err)
 276                goto err2;
 277
 278        /* init pending mmap list */
 279        spin_lock_init(&rxe->mmap_offset_lock);
 280        spin_lock_init(&rxe->pending_lock);
 281        INIT_LIST_HEAD(&rxe->pending_mmaps);
 282        INIT_LIST_HEAD(&rxe->list);
 283
 284        mutex_init(&rxe->usdev_lock);
 285
 286        return 0;
 287
 288err2:
 289        rxe_cleanup_ports(rxe);
 290err1:
 291        return err;
 292}
 293
 294void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
 295{
 296        struct rxe_port *port = &rxe->port;
 297        enum ib_mtu mtu;
 298
 299        mtu = eth_mtu_int_to_enum(ndev_mtu);
 300
 301        /* Make sure that new MTU in range */
 302        mtu = mtu ? min_t(enum ib_mtu, mtu, RXE_PORT_MAX_MTU) : IB_MTU_256;
 303
 304        port->attr.active_mtu = mtu;
 305        port->mtu_cap = ib_mtu_enum_to_int(mtu);
 306}
 307
 308/* called by ifc layer to create new rxe device.
 309 * The caller should allocate memory for rxe by calling ib_alloc_device.
 310 */
 311int rxe_add(struct rxe_dev *rxe, unsigned int mtu)
 312{
 313        int err;
 314
 315        kref_init(&rxe->ref_cnt);
 316
 317        err = rxe_init(rxe);
 318        if (err)
 319                goto err1;
 320
 321        rxe_set_mtu(rxe, mtu);
 322
 323        err = rxe_register_device(rxe);
 324        if (err)
 325                goto err1;
 326
 327        return 0;
 328
 329err1:
 330        rxe_dev_put(rxe);
 331        return err;
 332}
 333
 334/* called by the ifc layer to remove a device */
 335void rxe_remove(struct rxe_dev *rxe)
 336{
 337        rxe_unregister_device(rxe);
 338
 339        rxe_dev_put(rxe);
 340}
 341
 342static int __init rxe_module_init(void)
 343{
 344        int err;
 345
 346        /* initialize slab caches for managed objects */
 347        err = rxe_cache_init();
 348        if (err) {
 349                pr_err("unable to init object pools\n");
 350                return err;
 351        }
 352
 353        err = rxe_net_init();
 354        if (err)
 355                return err;
 356
 357        pr_info("loaded\n");
 358        return 0;
 359}
 360
 361static void __exit rxe_module_exit(void)
 362{
 363        rxe_remove_all();
 364        rxe_net_exit();
 365        rxe_cache_exit();
 366
 367        pr_info("unloaded\n");
 368}
 369
 370late_initcall(rxe_module_init);
 371module_exit(rxe_module_exit);
 372