1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
7 #include <rdma/rdma_netlink.h>
8 #include <net/addrconf.h>
12 MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
13 MODULE_DESCRIPTION("Soft RDMA transport");
14 MODULE_LICENSE("Dual BSD/GPL");
18 /* free resources for a rxe device all objects created for this device must
21 void rxe_dealloc(struct ib_device *ib_dev)
23 struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
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);
37 crypto_free_shash(rxe->tfm);
39 mutex_destroy(&rxe->usdev_lock);
42 /* initialize rxe device parameters */
43 static void rxe_init_device_param(struct rxe_dev *rxe)
45 rxe->max_inline_data = RXE_MAX_INLINE_DATA;
47 rxe->attr.vendor_id = RXE_VENDOR_ID;
48 rxe->attr.max_mr_size = RXE_MAX_MR_SIZE;
49 rxe->attr.page_size_cap = RXE_PAGE_SIZE_CAP;
50 rxe->attr.max_qp = RXE_MAX_QP;
51 rxe->attr.max_qp_wr = RXE_MAX_QP_WR;
52 rxe->attr.device_cap_flags = RXE_DEVICE_CAP_FLAGS;
53 rxe->attr.max_send_sge = RXE_MAX_SGE;
54 rxe->attr.max_recv_sge = RXE_MAX_SGE;
55 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD;
56 rxe->attr.max_cq = RXE_MAX_CQ;
57 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1;
58 rxe->attr.max_mr = RXE_MAX_MR;
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,
77 rxe->max_ucontext = RXE_MAX_UCONTEXT;
80 /* initialize port attributes */
81 static void rxe_init_port_param(struct rxe_port *port)
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);
106 /* initialize port state, note IB convention that HCA ports are always
109 static void rxe_init_ports(struct rxe_dev *rxe)
111 struct rxe_port *port = &rxe->port;
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);
119 /* init pools of managed objects */
120 static int rxe_init_pools(struct rxe_dev *rxe)
124 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
129 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
134 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
139 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
144 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
149 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
154 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
159 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
164 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
165 rxe->attr.max_mcast_grp);
169 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
170 rxe->attr.max_total_mcast_qp_attach);
177 rxe_pool_cleanup(&rxe->mc_grp_pool);
179 rxe_pool_cleanup(&rxe->mw_pool);
181 rxe_pool_cleanup(&rxe->mr_pool);
183 rxe_pool_cleanup(&rxe->cq_pool);
185 rxe_pool_cleanup(&rxe->qp_pool);
187 rxe_pool_cleanup(&rxe->srq_pool);
189 rxe_pool_cleanup(&rxe->ah_pool);
191 rxe_pool_cleanup(&rxe->pd_pool);
193 rxe_pool_cleanup(&rxe->uc_pool);
198 /* initialize rxe device state */
199 static int rxe_init(struct rxe_dev *rxe)
203 /* init default device parameters */
204 rxe_init_device_param(rxe);
208 err = rxe_init_pools(rxe);
212 /* init pending mmap list */
213 spin_lock_init(&rxe->mmap_offset_lock);
214 spin_lock_init(&rxe->pending_lock);
215 INIT_LIST_HEAD(&rxe->pending_mmaps);
217 mutex_init(&rxe->usdev_lock);
222 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
224 struct rxe_port *port = &rxe->port;
227 mtu = eth_mtu_int_to_enum(ndev_mtu);
229 /* Make sure that new MTU in range */
230 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
232 port->attr.active_mtu = mtu;
233 port->mtu_cap = ib_mtu_enum_to_int(mtu);
236 /* called by ifc layer to create new rxe device.
237 * The caller should allocate memory for rxe by calling ib_alloc_device.
239 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
247 rxe_set_mtu(rxe, mtu);
249 return rxe_register_device(rxe, ibdev_name);
252 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
254 struct rxe_dev *exists;
257 if (is_vlan_dev(ndev)) {
258 pr_err("rxe creation allowed on top of a real device only\n");
263 exists = rxe_get_dev_from_net(ndev);
265 ib_device_put(&exists->ib_dev);
266 pr_err("already configured on %s\n", ndev->name);
271 err = rxe_net_add(ibdev_name, ndev);
273 pr_err("failed to add %s\n", ndev->name);
280 static struct rdma_link_ops rxe_link_ops = {
282 .newlink = rxe_newlink,
285 static int __init rxe_module_init(void)
289 err = rxe_net_init();
293 rdma_link_register(&rxe_link_ops);
294 rxe_initialized = true;
299 static void __exit rxe_module_exit(void)
301 rdma_link_unregister(&rxe_link_ops);
302 ib_unregister_driver(RDMA_DRIVER_RXE);
305 rxe_initialized = false;
306 pr_info("unloaded\n");
309 late_initcall(rxe_module_init);
310 module_exit(rxe_module_exit);
312 MODULE_ALIAS_RDMA_LINK("rxe");