drivers/infiniband/sw/rxe/rxe.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   4  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   5  */
   6
   7 #include <rdma/rdma_netlink.h>
   8 #include <net/addrconf.h>
   9 #include "rxe.h"
  10 #include "rxe_loc.h"
  11
  12 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
  13 MODULE_DESCRIPTION("Soft RDMA transport");
  14 MODULE_LICENSE("Dual BSD/GPL");
  15
  16 bool rxe_initialized;
  17
  18 /* free resources for a rxe device all objects created for this device must
  19  * have been destroyed
  20  */
  21 void rxe_dealloc(struct ib_device *ib_dev)
  22 {
  23         struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
  24
  25         rxe_pool_cleanup(&rxe->uc_pool);
  26         rxe_pool_cleanup(&rxe->pd_pool);
  27         rxe_pool_cleanup(&rxe->ah_pool);
  28         rxe_pool_cleanup(&rxe->srq_pool);
  29         rxe_pool_cleanup(&rxe->qp_pool);
  30         rxe_pool_cleanup(&rxe->cq_pool);
  31         rxe_pool_cleanup(&rxe->mr_pool);
  32         rxe_pool_cleanup(&rxe->mw_pool);
  33         rxe_pool_cleanup(&rxe->mc_grp_pool);
  34         rxe_pool_cleanup(&rxe->mc_elem_pool);
  35
  36         if (rxe->tfm)
  37                 crypto_free_shash(rxe->tfm);
  38 }
  39
  40 /* initialize rxe device parameters */
  41 static void rxe_init_device_param(struct rxe_dev *rxe)
  42 {
  43         rxe->max_inline_data                    = RXE_MAX_INLINE_DATA;
  44
  45         rxe->attr.vendor_id                     = RXE_VENDOR_ID;
  46         rxe->attr.max_mr_size                   = RXE_MAX_MR_SIZE;
  47         rxe->attr.page_size_cap                 = RXE_PAGE_SIZE_CAP;
  48         rxe->attr.max_qp                        = RXE_MAX_QP;
  49         rxe->attr.max_qp_wr                     = RXE_MAX_QP_WR;
  50         rxe->attr.device_cap_flags              = RXE_DEVICE_CAP_FLAGS;
  51         rxe->attr.max_send_sge                  = RXE_MAX_SGE;
  52         rxe->attr.max_recv_sge                  = RXE_MAX_SGE;
  53         rxe->attr.max_sge_rd                    = RXE_MAX_SGE_RD;
  54         rxe->attr.max_cq                        = RXE_MAX_CQ;
  55         rxe->attr.max_cqe                       = (1 << RXE_MAX_LOG_CQE) - 1;
  56         rxe->attr.max_mr                        = RXE_MAX_MR;
  57         rxe->attr.max_pd                        = RXE_MAX_PD;
  58         rxe->attr.max_qp_rd_atom                = RXE_MAX_QP_RD_ATOM;
  59         rxe->attr.max_res_rd_atom               = RXE_MAX_RES_RD_ATOM;
  60         rxe->attr.max_qp_init_rd_atom           = RXE_MAX_QP_INIT_RD_ATOM;
  61         rxe->attr.atomic_cap                    = IB_ATOMIC_HCA;
  62         rxe->attr.max_mcast_grp                 = RXE_MAX_MCAST_GRP;
  63         rxe->attr.max_mcast_qp_attach           = RXE_MAX_MCAST_QP_ATTACH;
  64         rxe->attr.max_total_mcast_qp_attach     = RXE_MAX_TOT_MCAST_QP_ATTACH;
  65         rxe->attr.max_ah                        = RXE_MAX_AH;
  66         rxe->attr.max_srq                       = RXE_MAX_SRQ;
  67         rxe->attr.max_srq_wr                    = RXE_MAX_SRQ_WR;
  68         rxe->attr.max_srq_sge                   = RXE_MAX_SRQ_SGE;
  69         rxe->attr.max_fast_reg_page_list_len    = RXE_MAX_FMR_PAGE_LIST_LEN;
  70         rxe->attr.max_pkeys                     = RXE_MAX_PKEYS;
  71         rxe->attr.local_ca_ack_delay            = RXE_LOCAL_CA_ACK_DELAY;
  72         addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
  73                         rxe->ndev->dev_addr);
  74
  75         rxe->max_ucontext                       = RXE_MAX_UCONTEXT;
  76 }
  77
  78 /* initialize port attributes */
  79 static void rxe_init_port_param(struct rxe_port *port)
  80 {
  81         port->attr.state                = IB_PORT_DOWN;
  82         port->attr.max_mtu              = IB_MTU_4096;
  83         port->attr.active_mtu           = IB_MTU_256;
  84         port->attr.gid_tbl_len          = RXE_PORT_GID_TBL_LEN;
  85         port->attr.port_cap_flags       = RXE_PORT_PORT_CAP_FLAGS;
  86         port->attr.max_msg_sz           = RXE_PORT_MAX_MSG_SZ;
  87         port->attr.bad_pkey_cntr        = RXE_PORT_BAD_PKEY_CNTR;
  88         port->attr.qkey_viol_cntr       = RXE_PORT_QKEY_VIOL_CNTR;
  89         port->attr.pkey_tbl_len         = RXE_PORT_PKEY_TBL_LEN;
  90         port->attr.lid                  = RXE_PORT_LID;
  91         port->attr.sm_lid               = RXE_PORT_SM_LID;
  92         port->attr.lmc                  = RXE_PORT_LMC;
  93         port->attr.max_vl_num           = RXE_PORT_MAX_VL_NUM;
  94         port->attr.sm_sl                = RXE_PORT_SM_SL;
  95         port->attr.subnet_timeout       = RXE_PORT_SUBNET_TIMEOUT;
  96         port->attr.init_type_reply      = RXE_PORT_INIT_TYPE_REPLY;
  97         port->attr.active_width         = RXE_PORT_ACTIVE_WIDTH;
  98         port->attr.active_speed         = RXE_PORT_ACTIVE_SPEED;
  99         port->attr.phys_state           = RXE_PORT_PHYS_STATE;
 100         port->mtu_cap                   = ib_mtu_enum_to_int(IB_MTU_256);
 101         port->subnet_prefix             = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
 102 }
 103
 104 /* initialize port state, note IB convention that HCA ports are always
 105  * numbered from 1
 106  */
 107 static void rxe_init_ports(struct rxe_dev *rxe)
 108 {
 109         struct rxe_port *port = &rxe->port;
 110
 111         rxe_init_port_param(port);
 112         addrconf_addr_eui48((unsigned char *)&port->port_guid,
 113                             rxe->ndev->dev_addr);
 114         spin_lock_init(&port->port_lock);
 115 }
 116
 117 /* init pools of managed objects */
 118 static int rxe_init_pools(struct rxe_dev *rxe)
 119 {
 120         int err;
 121
 122         err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
 123                             rxe->max_ucontext);
 124         if (err)
 125                 goto err1;
 126
 127         err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
 128                             rxe->attr.max_pd);
 129         if (err)
 130                 goto err2;
 131
 132         err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
 133                             rxe->attr.max_ah);
 134         if (err)
 135                 goto err3;
 136
 137         err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
 138                             rxe->attr.max_srq);
 139         if (err)
 140                 goto err4;
 141
 142         err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
 143                             rxe->attr.max_qp);
 144         if (err)
 145                 goto err5;
 146
 147         err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
 148                             rxe->attr.max_cq);
 149         if (err)
 150                 goto err6;
 151
 152         err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
 153                             rxe->attr.max_mr);
 154         if (err)
 155                 goto err7;
 156
 157         err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
 158                             rxe->attr.max_mw);
 159         if (err)
 160                 goto err8;
 161
 162         err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
 163                             rxe->attr.max_mcast_grp);
 164         if (err)
 165                 goto err9;
 166
 167         err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
 168                             rxe->attr.max_total_mcast_qp_attach);
 169         if (err)
 170                 goto err10;
 171
 172         return 0;
 173
 174 err10:
 175         rxe_pool_cleanup(&rxe->mc_grp_pool);
 176 err9:
 177         rxe_pool_cleanup(&rxe->mw_pool);
 178 err8:
 179         rxe_pool_cleanup(&rxe->mr_pool);
 180 err7:
 181         rxe_pool_cleanup(&rxe->cq_pool);
 182 err6:
 183         rxe_pool_cleanup(&rxe->qp_pool);
 184 err5:
 185         rxe_pool_cleanup(&rxe->srq_pool);
 186 err4:
 187         rxe_pool_cleanup(&rxe->ah_pool);
 188 err3:
 189         rxe_pool_cleanup(&rxe->pd_pool);
 190 err2:
 191         rxe_pool_cleanup(&rxe->uc_pool);
 192 err1:
 193         return err;
 194 }
 195
 196 /* initialize rxe device state */
 197 static int rxe_init(struct rxe_dev *rxe)
 198 {
 199         int err;
 200
 201         /* init default device parameters */
 202         rxe_init_device_param(rxe);
 203
 204         rxe_init_ports(rxe);
 205
 206         err = rxe_init_pools(rxe);
 207         if (err)
 208                 return err;
 209
 210         /* init pending mmap list */
 211         spin_lock_init(&rxe->mmap_offset_lock);
 212         spin_lock_init(&rxe->pending_lock);
 213         INIT_LIST_HEAD(&rxe->pending_mmaps);
 214
 215         mutex_init(&rxe->usdev_lock);
 216
 217         return 0;
 218 }
 219
 220 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
 221 {
 222         struct rxe_port *port = &rxe->port;
 223         enum ib_mtu mtu;
 224
 225         mtu = eth_mtu_int_to_enum(ndev_mtu);
 226
 227         /* Make sure that new MTU in range */
 228         mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
 229
 230         port->attr.active_mtu = mtu;
 231         port->mtu_cap = ib_mtu_enum_to_int(mtu);
 232 }
 233
 234 /* called by ifc layer to create new rxe device.
 235  * The caller should allocate memory for rxe by calling ib_alloc_device.
 236  */
 237 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
 238 {
 239         int err;
 240
 241         err = rxe_init(rxe);
 242         if (err)
 243                 return err;
 244
 245         rxe_set_mtu(rxe, mtu);
 246
 247         return rxe_register_device(rxe, ibdev_name);
 248 }
 249
 250 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
 251 {
 252         struct rxe_dev *exists;
 253         int err = 0;
 254
 255         if (is_vlan_dev(ndev)) {
 256                 pr_err("rxe creation allowed on top of a real device only\n");
 257                 err = -EPERM;
 258                 goto err;
 259         }
 260
 261         exists = rxe_get_dev_from_net(ndev);
 262         if (exists) {
 263                 ib_device_put(&exists->ib_dev);
 264                 pr_err("already configured on %s\n", ndev->name);
 265                 err = -EEXIST;
 266                 goto err;
 267         }
 268
 269         err = rxe_net_add(ibdev_name, ndev);
 270         if (err) {
 271                 pr_err("failed to add %s\n", ndev->name);
 272                 goto err;
 273         }
 274 err:
 275         return err;
 276 }
 277
 278 static struct rdma_link_ops rxe_link_ops = {
 279         .type = "rxe",
 280         .newlink = rxe_newlink,
 281 };
 282
 283 static int __init rxe_module_init(void)
 284 {
 285         int err;
 286
 287         err = rxe_net_init();
 288         if (err)
 289                 return err;
 290
 291         rdma_link_register(&rxe_link_ops);
 292         rxe_initialized = true;
 293         pr_info("loaded\n");
 294         return 0;
 295 }
 296
 297 static void __exit rxe_module_exit(void)
 298 {
 299         rdma_link_unregister(&rxe_link_ops);
 300         ib_unregister_driver(RDMA_DRIVER_RXE);
 301         rxe_net_exit();
 302
 303         rxe_initialized = false;
 304         pr_info("unloaded\n");
 305 }
 306
 307 late_initcall(rxe_module_init);
 308 module_exit(rxe_module_exit);
 309
 310 MODULE_ALIAS_RDMA_LINK("rxe");