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1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB2/*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 12MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");13MODULE_DESCRIPTION("Soft RDMA transport");14MODULE_LICENSE("Dual BSD/GPL");15 16/* free resources for a rxe device all objects created for this device must17 * have been destroyed18 */19void rxe_dealloc(struct ib_device *ib_dev)20{21 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);22 23 rxe_pool_cleanup(&rxe->uc_pool);24 rxe_pool_cleanup(&rxe->pd_pool);25 rxe_pool_cleanup(&rxe->ah_pool);26 rxe_pool_cleanup(&rxe->srq_pool);27 rxe_pool_cleanup(&rxe->qp_pool);28 rxe_pool_cleanup(&rxe->cq_pool);29 rxe_pool_cleanup(&rxe->mr_pool);30 rxe_pool_cleanup(&rxe->mw_pool);31 32 WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree));33 34 if (rxe->tfm)35 crypto_free_shash(rxe->tfm);36 37 mutex_destroy(&rxe->usdev_lock);38}39 40/* initialize rxe device parameters */41static 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.kernel_cap_flags = IBK_ALLOW_USER_UNREG;52 rxe->attr.max_send_sge = RXE_MAX_SGE;53 rxe->attr.max_recv_sge = RXE_MAX_SGE;54 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD;55 rxe->attr.max_cq = RXE_MAX_CQ;56 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1;57 rxe->attr.max_mr = RXE_MAX_MR;58 rxe->attr.max_mw = RXE_MAX_MW;59 rxe->attr.max_pd = RXE_MAX_PD;60 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM;61 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM;62 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM;63 rxe->attr.atomic_cap = IB_ATOMIC_HCA;64 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP;65 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH;66 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH;67 rxe->attr.max_ah = RXE_MAX_AH;68 rxe->attr.max_srq = RXE_MAX_SRQ;69 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR;70 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE;71 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN;72 rxe->attr.max_pkeys = RXE_MAX_PKEYS;73 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY;74 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,75 rxe->ndev->dev_addr);76 77 rxe->max_ucontext = RXE_MAX_UCONTEXT;78}79 80/* initialize port attributes */81static void rxe_init_port_param(struct rxe_port *port)82{83 port->attr.state = IB_PORT_DOWN;84 port->attr.max_mtu = IB_MTU_4096;85 port->attr.active_mtu = IB_MTU_256;86 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN;87 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS;88 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ;89 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR;90 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR;91 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN;92 port->attr.lid = RXE_PORT_LID;93 port->attr.sm_lid = RXE_PORT_SM_LID;94 port->attr.lmc = RXE_PORT_LMC;95 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM;96 port->attr.sm_sl = RXE_PORT_SM_SL;97 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT;98 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY;99 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH;100 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED;101 port->attr.phys_state = RXE_PORT_PHYS_STATE;102 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256);103 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);104}105 106/* initialize port state, note IB convention that HCA ports are always107 * numbered from 1108 */109static void rxe_init_ports(struct rxe_dev *rxe)110{111 struct rxe_port *port = &rxe->port;112 113 rxe_init_port_param(port);114 addrconf_addr_eui48((unsigned char *)&port->port_guid,115 rxe->ndev->dev_addr);116 spin_lock_init(&port->port_lock);117}118 119/* init pools of managed objects */120static void rxe_init_pools(struct rxe_dev *rxe)121{122 rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC);123 rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD);124 rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH);125 rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ);126 rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP);127 rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ);128 rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR);129 rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW);130}131 132/* initialize rxe device state */133static void rxe_init(struct rxe_dev *rxe)134{135 /* init default device parameters */136 rxe_init_device_param(rxe);137 138 rxe_init_ports(rxe);139 rxe_init_pools(rxe);140 141 /* init pending mmap list */142 spin_lock_init(&rxe->mmap_offset_lock);143 spin_lock_init(&rxe->pending_lock);144 INIT_LIST_HEAD(&rxe->pending_mmaps);145 146 /* init multicast support */147 spin_lock_init(&rxe->mcg_lock);148 rxe->mcg_tree = RB_ROOT;149 150 mutex_init(&rxe->usdev_lock);151}152 153void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)154{155 struct rxe_port *port = &rxe->port;156 enum ib_mtu mtu;157 158 mtu = eth_mtu_int_to_enum(ndev_mtu);159 160 /* Make sure that new MTU in range */161 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;162 163 port->attr.active_mtu = mtu;164 port->mtu_cap = ib_mtu_enum_to_int(mtu);165}166 167/* called by ifc layer to create new rxe device.168 * The caller should allocate memory for rxe by calling ib_alloc_device.169 */170int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)171{172 rxe_init(rxe);173 rxe_set_mtu(rxe, mtu);174 175 return rxe_register_device(rxe, ibdev_name);176}177 178static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)179{180 struct rxe_dev *rxe;181 int err = 0;182 183 if (is_vlan_dev(ndev)) {184 rxe_err("rxe creation allowed on top of a real device only\n");185 err = -EPERM;186 goto err;187 }188 189 rxe = rxe_get_dev_from_net(ndev);190 if (rxe) {191 ib_device_put(&rxe->ib_dev);192 rxe_err_dev(rxe, "already configured on %s\n", ndev->name);193 err = -EEXIST;194 goto err;195 }196 197 err = rxe_net_add(ibdev_name, ndev);198 if (err) {199 rxe_err("failed to add %s\n", ndev->name);200 goto err;201 }202err:203 return err;204}205 206static struct rdma_link_ops rxe_link_ops = {207 .type = "rxe",208 .newlink = rxe_newlink,209};210 211static int __init rxe_module_init(void)212{213 int err;214 215 err = rxe_alloc_wq();216 if (err)217 return err;218 219 err = rxe_net_init();220 if (err) {221 rxe_destroy_wq();222 return err;223 }224 225 rdma_link_register(&rxe_link_ops);226 pr_info("loaded\n");227 return 0;228}229 230static void __exit rxe_module_exit(void)231{232 rdma_link_unregister(&rxe_link_ops);233 ib_unregister_driver(RDMA_DRIVER_RXE);234 rxe_net_exit();235 rxe_destroy_wq();236 237 pr_info("unloaded\n");238}239 240late_initcall(rxe_module_init);241module_exit(rxe_module_exit);242 243MODULE_ALIAS_RDMA_LINK("rxe");244