root/drivers/infiniband/sw/rxe/rxe.c

DEFINITIONS

1. rxe_cleanup_ports
2. rxe_dealloc
3. rxe_init_device_param
4. rxe_init_port_param
5. rxe_init_ports
6. rxe_init_pools
7. rxe_init
8. rxe_set_mtu
9. rxe_add
10. rxe_newlink
11. rxe_module_init
12. rxe_module_exit

   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 
  39 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
  40 MODULE_DESCRIPTION("Soft RDMA transport");
  41 MODULE_LICENSE("Dual BSD/GPL");
  42 
  43 /* free resources for all ports on a device */
  44 static void rxe_cleanup_ports(struct rxe_dev *rxe)
  45 {
  46         kfree(rxe->port.pkey_tbl);
  47         rxe->port.pkey_tbl = NULL;
  48 
  49 }
  50 
  51 /* free resources for a rxe device all objects created for this device must
  52  * have been destroyed
  53  */
  54 void rxe_dealloc(struct ib_device *ib_dev)
  55 {
  56         struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
  57 
  58         rxe_pool_cleanup(&rxe->uc_pool);
  59         rxe_pool_cleanup(&rxe->pd_pool);
  60         rxe_pool_cleanup(&rxe->ah_pool);
  61         rxe_pool_cleanup(&rxe->srq_pool);
  62         rxe_pool_cleanup(&rxe->qp_pool);
  63         rxe_pool_cleanup(&rxe->cq_pool);
  64         rxe_pool_cleanup(&rxe->mr_pool);
  65         rxe_pool_cleanup(&rxe->mw_pool);
  66         rxe_pool_cleanup(&rxe->mc_grp_pool);
  67         rxe_pool_cleanup(&rxe->mc_elem_pool);
  68 
  69         rxe_cleanup_ports(rxe);
  70 
  71         if (rxe->tfm)
  72                 crypto_free_shash(rxe->tfm);
  73 }
  74 
  75 /* initialize rxe device parameters */
  76 static void rxe_init_device_param(struct rxe_dev *rxe)
  77 {
  78         rxe->max_inline_data                    = RXE_MAX_INLINE_DATA;
  79 
  80         rxe->attr.fw_ver                        = RXE_FW_VER;
  81         rxe->attr.max_mr_size                   = RXE_MAX_MR_SIZE;
  82         rxe->attr.page_size_cap                 = RXE_PAGE_SIZE_CAP;
  83         rxe->attr.vendor_id                     = RXE_VENDOR_ID;
  84         rxe->attr.vendor_part_id                = RXE_VENDOR_PART_ID;
  85         rxe->attr.hw_ver                        = RXE_HW_VER;
  86         rxe->attr.max_qp                        = RXE_MAX_QP;
  87         rxe->attr.max_qp_wr                     = RXE_MAX_QP_WR;
  88         rxe->attr.device_cap_flags              = RXE_DEVICE_CAP_FLAGS;
  89         rxe->attr.max_send_sge                  = RXE_MAX_SGE;
  90         rxe->attr.max_recv_sge                  = RXE_MAX_SGE;
  91         rxe->attr.max_sge_rd                    = RXE_MAX_SGE_RD;
  92         rxe->attr.max_cq                        = RXE_MAX_CQ;
  93         rxe->attr.max_cqe                       = (1 << RXE_MAX_LOG_CQE) - 1;
  94         rxe->attr.max_mr                        = RXE_MAX_MR;
  95         rxe->attr.max_pd                        = RXE_MAX_PD;
  96         rxe->attr.max_qp_rd_atom                = RXE_MAX_QP_RD_ATOM;
  97         rxe->attr.max_ee_rd_atom                = RXE_MAX_EE_RD_ATOM;
  98         rxe->attr.max_res_rd_atom               = RXE_MAX_RES_RD_ATOM;
  99         rxe->attr.max_qp_init_rd_atom           = RXE_MAX_QP_INIT_RD_ATOM;
 100         rxe->attr.max_ee_init_rd_atom           = RXE_MAX_EE_INIT_RD_ATOM;
 101         rxe->attr.atomic_cap                    = IB_ATOMIC_HCA;
 102         rxe->attr.max_ee                        = RXE_MAX_EE;
 103         rxe->attr.max_rdd                       = RXE_MAX_RDD;
 104         rxe->attr.max_mw                        = RXE_MAX_MW;
 105         rxe->attr.max_raw_ipv6_qp               = RXE_MAX_RAW_IPV6_QP;
 106         rxe->attr.max_raw_ethy_qp               = RXE_MAX_RAW_ETHY_QP;
 107         rxe->attr.max_mcast_grp                 = RXE_MAX_MCAST_GRP;
 108         rxe->attr.max_mcast_qp_attach           = RXE_MAX_MCAST_QP_ATTACH;
 109         rxe->attr.max_total_mcast_qp_attach     = RXE_MAX_TOT_MCAST_QP_ATTACH;
 110         rxe->attr.max_ah                        = RXE_MAX_AH;
 111         rxe->attr.max_fmr                       = RXE_MAX_FMR;
 112         rxe->attr.max_map_per_fmr               = RXE_MAX_MAP_PER_FMR;
 113         rxe->attr.max_srq                       = RXE_MAX_SRQ;
 114         rxe->attr.max_srq_wr                    = RXE_MAX_SRQ_WR;
 115         rxe->attr.max_srq_sge                   = RXE_MAX_SRQ_SGE;
 116         rxe->attr.max_fast_reg_page_list_len    = RXE_MAX_FMR_PAGE_LIST_LEN;
 117         rxe->attr.max_pkeys                     = RXE_MAX_PKEYS;
 118         rxe->attr.local_ca_ack_delay            = RXE_LOCAL_CA_ACK_DELAY;
 119 
 120         rxe->max_ucontext                       = RXE_MAX_UCONTEXT;
 121 }
 122 
 123 /* initialize port attributes */
 124 static int rxe_init_port_param(struct rxe_port *port)
 125 {
 126         port->attr.state                = IB_PORT_DOWN;
 127         port->attr.max_mtu              = IB_MTU_4096;
 128         port->attr.active_mtu           = IB_MTU_256;
 129         port->attr.gid_tbl_len          = RXE_PORT_GID_TBL_LEN;
 130         port->attr.port_cap_flags       = RXE_PORT_PORT_CAP_FLAGS;
 131         port->attr.max_msg_sz           = RXE_PORT_MAX_MSG_SZ;
 132         port->attr.bad_pkey_cntr        = RXE_PORT_BAD_PKEY_CNTR;
 133         port->attr.qkey_viol_cntr       = RXE_PORT_QKEY_VIOL_CNTR;
 134         port->attr.pkey_tbl_len         = RXE_PORT_PKEY_TBL_LEN;
 135         port->attr.lid                  = RXE_PORT_LID;
 136         port->attr.sm_lid               = RXE_PORT_SM_LID;
 137         port->attr.lmc                  = RXE_PORT_LMC;
 138         port->attr.max_vl_num           = RXE_PORT_MAX_VL_NUM;
 139         port->attr.sm_sl                = RXE_PORT_SM_SL;
 140         port->attr.subnet_timeout       = RXE_PORT_SUBNET_TIMEOUT;
 141         port->attr.init_type_reply      = RXE_PORT_INIT_TYPE_REPLY;
 142         port->attr.active_width         = RXE_PORT_ACTIVE_WIDTH;
 143         port->attr.active_speed         = RXE_PORT_ACTIVE_SPEED;
 144         port->attr.phys_state           = RXE_PORT_PHYS_STATE;
 145         port->mtu_cap                   = ib_mtu_enum_to_int(IB_MTU_256);
 146         port->subnet_prefix             = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
 147 
 148         return 0;
 149 }
 150 
 151 /* initialize port state, note IB convention that HCA ports are always
 152  * numbered from 1
 153  */
 154 static int rxe_init_ports(struct rxe_dev *rxe)
 155 {
 156         struct rxe_port *port = &rxe->port;
 157 
 158         rxe_init_port_param(port);
 159 
 160         if (!port->attr.pkey_tbl_len || !port->attr.gid_tbl_len)
 161                 return -EINVAL;
 162 
 163         port->pkey_tbl = kcalloc(port->attr.pkey_tbl_len,
 164                         sizeof(*port->pkey_tbl), GFP_KERNEL);
 165 
 166         if (!port->pkey_tbl)
 167                 return -ENOMEM;
 168 
 169         port->pkey_tbl[0] = 0xffff;
 170         addrconf_addr_eui48((unsigned char *)&port->port_guid,
 171                             rxe->ndev->dev_addr);
 172 
 173         spin_lock_init(&port->port_lock);
 174 
 175         return 0;
 176 }
 177 
 178 /* init pools of managed objects */
 179 static int rxe_init_pools(struct rxe_dev *rxe)
 180 {
 181         int err;
 182 
 183         err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
 184                             rxe->max_ucontext);
 185         if (err)
 186                 goto err1;
 187 
 188         err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
 189                             rxe->attr.max_pd);
 190         if (err)
 191                 goto err2;
 192 
 193         err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
 194                             rxe->attr.max_ah);
 195         if (err)
 196                 goto err3;
 197 
 198         err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
 199                             rxe->attr.max_srq);
 200         if (err)
 201                 goto err4;
 202 
 203         err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
 204                             rxe->attr.max_qp);
 205         if (err)
 206                 goto err5;
 207 
 208         err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
 209                             rxe->attr.max_cq);
 210         if (err)
 211                 goto err6;
 212 
 213         err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
 214                             rxe->attr.max_mr);
 215         if (err)
 216                 goto err7;
 217 
 218         err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
 219                             rxe->attr.max_mw);
 220         if (err)
 221                 goto err8;
 222 
 223         err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
 224                             rxe->attr.max_mcast_grp);
 225         if (err)
 226                 goto err9;
 227 
 228         err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
 229                             rxe->attr.max_total_mcast_qp_attach);
 230         if (err)
 231                 goto err10;
 232 
 233         return 0;
 234 
 235 err10:
 236         rxe_pool_cleanup(&rxe->mc_grp_pool);
 237 err9:
 238         rxe_pool_cleanup(&rxe->mw_pool);
 239 err8:
 240         rxe_pool_cleanup(&rxe->mr_pool);
 241 err7:
 242         rxe_pool_cleanup(&rxe->cq_pool);
 243 err6:
 244         rxe_pool_cleanup(&rxe->qp_pool);
 245 err5:
 246         rxe_pool_cleanup(&rxe->srq_pool);
 247 err4:
 248         rxe_pool_cleanup(&rxe->ah_pool);
 249 err3:
 250         rxe_pool_cleanup(&rxe->pd_pool);
 251 err2:
 252         rxe_pool_cleanup(&rxe->uc_pool);
 253 err1:
 254         return err;
 255 }
 256 
 257 /* initialize rxe device state */
 258 static int rxe_init(struct rxe_dev *rxe)
 259 {
 260         int err;
 261 
 262         /* init default device parameters */
 263         rxe_init_device_param(rxe);
 264 
 265         err = rxe_init_ports(rxe);
 266         if (err)
 267                 goto err1;
 268 
 269         err = rxe_init_pools(rxe);
 270         if (err)
 271                 goto err2;
 272 
 273         /* init pending mmap list */
 274         spin_lock_init(&rxe->mmap_offset_lock);
 275         spin_lock_init(&rxe->pending_lock);
 276         INIT_LIST_HEAD(&rxe->pending_mmaps);
 277 
 278         mutex_init(&rxe->usdev_lock);
 279 
 280         return 0;
 281 
 282 err2:
 283         rxe_cleanup_ports(rxe);
 284 err1:
 285         return err;
 286 }
 287 
 288 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
 289 {
 290         struct rxe_port *port = &rxe->port;
 291         enum ib_mtu mtu;
 292 
 293         mtu = eth_mtu_int_to_enum(ndev_mtu);
 294 
 295         /* Make sure that new MTU in range */
 296         mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
 297 
 298         port->attr.active_mtu = mtu;
 299         port->mtu_cap = ib_mtu_enum_to_int(mtu);
 300 }
 301 
 302 /* called by ifc layer to create new rxe device.
 303  * The caller should allocate memory for rxe by calling ib_alloc_device.
 304  */
 305 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
 306 {
 307         int err;
 308 
 309         err = rxe_init(rxe);
 310         if (err)
 311                 return err;
 312 
 313         rxe_set_mtu(rxe, mtu);
 314 
 315         return rxe_register_device(rxe, ibdev_name);
 316 }
 317 
 318 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
 319 {
 320         struct rxe_dev *exists;
 321         int err = 0;
 322 
 323         exists = rxe_get_dev_from_net(ndev);
 324         if (exists) {
 325                 ib_device_put(&exists->ib_dev);
 326                 pr_err("already configured on %s\n", ndev->name);
 327                 err = -EEXIST;
 328                 goto err;
 329         }
 330 
 331         err = rxe_net_add(ibdev_name, ndev);
 332         if (err) {
 333                 pr_err("failed to add %s\n", ndev->name);
 334                 goto err;
 335         }
 336 err:
 337         return err;
 338 }
 339 
 340 static struct rdma_link_ops rxe_link_ops = {
 341         .type = "rxe",
 342         .newlink = rxe_newlink,
 343 };
 344 
 345 static int __init rxe_module_init(void)
 346 {
 347         int err;
 348 
 349         /* initialize slab caches for managed objects */
 350         err = rxe_cache_init();
 351         if (err) {
 352                 pr_err("unable to init object pools\n");
 353                 return err;
 354         }
 355 
 356         err = rxe_net_init();
 357         if (err)
 358                 return err;
 359 
 360         rdma_link_register(&rxe_link_ops);
 361         pr_info("loaded\n");
 362         return 0;
 363 }
 364 
 365 static void __exit rxe_module_exit(void)
 366 {
 367         rdma_link_unregister(&rxe_link_ops);
 368         ib_unregister_driver(RDMA_DRIVER_RXE);
 369         rxe_net_exit();
 370         rxe_cache_exit();
 371 
 372         pr_info("unloaded\n");
 373 }
 374 
 375 late_initcall(rxe_module_init);
 376 module_exit(rxe_module_exit);
 377 
 378 MODULE_ALIAS_RDMA_LINK("rxe");