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 /* free resources for a rxe device all objects created for this device must
17 * have been destroyed
18 */
rxe_dealloc(struct ib_device * ib_dev)19 void 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 */
rxe_init_device_param(struct rxe_dev * rxe)41 static void rxe_init_device_param(struct rxe_dev *rxe)
42 {
43 struct net_device *ndev;
44
45 rxe->max_inline_data = RXE_MAX_INLINE_DATA;
46
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.kernel_cap_flags = IBK_ALLOW_USER_UNREG;
54 rxe->attr.max_send_sge = RXE_MAX_SGE;
55 rxe->attr.max_recv_sge = RXE_MAX_SGE;
56 rxe->attr.max_sge_rd = RXE_MAX_SGE_RD;
57 rxe->attr.max_cq = RXE_MAX_CQ;
58 rxe->attr.max_cqe = (1 << RXE_MAX_LOG_CQE) - 1;
59 rxe->attr.max_mr = RXE_MAX_MR;
60 rxe->attr.max_mw = RXE_MAX_MW;
61 rxe->attr.max_pd = RXE_MAX_PD;
62 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM;
63 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM;
64 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM;
65 rxe->attr.atomic_cap = IB_ATOMIC_HCA;
66 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP;
67 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH;
68 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH;
69 rxe->attr.max_ah = RXE_MAX_AH;
70 rxe->attr.max_srq = RXE_MAX_SRQ;
71 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR;
72 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE;
73 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN;
74 rxe->attr.max_pkeys = RXE_MAX_PKEYS;
75 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY;
76
77 ndev = rxe_ib_device_get_netdev(&rxe->ib_dev);
78 if (!ndev)
79 return;
80
81 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
82 ndev->dev_addr);
83
84 dev_put(ndev);
85
86 rxe->max_ucontext = RXE_MAX_UCONTEXT;
87 }
88
89 /* initialize port attributes */
rxe_init_port_param(struct rxe_port * port)90 static void rxe_init_port_param(struct rxe_port *port)
91 {
92 port->attr.state = IB_PORT_DOWN;
93 port->attr.max_mtu = IB_MTU_4096;
94 port->attr.active_mtu = IB_MTU_256;
95 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN;
96 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS;
97 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ;
98 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR;
99 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR;
100 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN;
101 port->attr.lid = RXE_PORT_LID;
102 port->attr.sm_lid = RXE_PORT_SM_LID;
103 port->attr.lmc = RXE_PORT_LMC;
104 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM;
105 port->attr.sm_sl = RXE_PORT_SM_SL;
106 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT;
107 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY;
108 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH;
109 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED;
110 port->attr.phys_state = RXE_PORT_PHYS_STATE;
111 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256);
112 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
113 }
114
115 /* initialize port state, note IB convention that HCA ports are always
116 * numbered from 1
117 */
rxe_init_ports(struct rxe_dev * rxe)118 static void rxe_init_ports(struct rxe_dev *rxe)
119 {
120 struct rxe_port *port = &rxe->port;
121 struct net_device *ndev;
122
123 rxe_init_port_param(port);
124 ndev = rxe_ib_device_get_netdev(&rxe->ib_dev);
125 if (!ndev)
126 return;
127 addrconf_addr_eui48((unsigned char *)&port->port_guid,
128 ndev->dev_addr);
129 dev_put(ndev);
130 spin_lock_init(&port->port_lock);
131 }
132
133 /* init pools of managed objects */
rxe_init_pools(struct rxe_dev * rxe)134 static void rxe_init_pools(struct rxe_dev *rxe)
135 {
136 rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC);
137 rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD);
138 rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH);
139 rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ);
140 rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP);
141 rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ);
142 rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR);
143 rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW);
144 }
145
146 /* initialize rxe device state */
rxe_init(struct rxe_dev * rxe)147 static void rxe_init(struct rxe_dev *rxe)
148 {
149 /* init default device parameters */
150 rxe_init_device_param(rxe);
151
152 rxe_init_ports(rxe);
153 rxe_init_pools(rxe);
154
155 /* init pending mmap list */
156 spin_lock_init(&rxe->mmap_offset_lock);
157 spin_lock_init(&rxe->pending_lock);
158 INIT_LIST_HEAD(&rxe->pending_mmaps);
159
160 /* init multicast support */
161 spin_lock_init(&rxe->mcg_lock);
162 rxe->mcg_tree = RB_ROOT;
163
164 mutex_init(&rxe->usdev_lock);
165 }
166
rxe_set_mtu(struct rxe_dev * rxe,unsigned int ndev_mtu)167 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
168 {
169 struct rxe_port *port = &rxe->port;
170 enum ib_mtu mtu;
171
172 mtu = eth_mtu_int_to_enum(ndev_mtu);
173
174 /* Make sure that new MTU in range */
175 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
176
177 port->attr.active_mtu = mtu;
178 port->mtu_cap = ib_mtu_enum_to_int(mtu);
179 }
180
181 /* called by ifc layer to create new rxe device.
182 * The caller should allocate memory for rxe by calling ib_alloc_device.
183 */
rxe_add(struct rxe_dev * rxe,unsigned int mtu,const char * ibdev_name,struct net_device * ndev)184 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name,
185 struct net_device *ndev)
186 {
187 rxe_init(rxe);
188 rxe_set_mtu(rxe, mtu);
189
190 return rxe_register_device(rxe, ibdev_name, ndev);
191 }
192
rxe_newlink(const char * ibdev_name,struct net_device * ndev)193 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
194 {
195 struct rxe_dev *rxe;
196 int err = 0;
197
198 if (is_vlan_dev(ndev)) {
199 rxe_err("rxe creation allowed on top of a real device only\n");
200 err = -EPERM;
201 goto err;
202 }
203
204 rxe = rxe_get_dev_from_net(ndev);
205 if (rxe) {
206 ib_device_put(&rxe->ib_dev);
207 rxe_err_dev(rxe, "already configured on %s\n", ndev->name);
208 err = -EEXIST;
209 goto err;
210 }
211
212 err = rxe_net_add(ibdev_name, ndev);
213 if (err) {
214 rxe_err("failed to add %s\n", ndev->name);
215 goto err;
216 }
217 err:
218 return err;
219 }
220
221 static struct rdma_link_ops rxe_link_ops = {
222 .type = "rxe",
223 .newlink = rxe_newlink,
224 };
225
rxe_module_init(void)226 static int __init rxe_module_init(void)
227 {
228 int err;
229
230 err = rxe_alloc_wq();
231 if (err)
232 return err;
233
234 err = rxe_net_init();
235 if (err) {
236 rxe_destroy_wq();
237 return err;
238 }
239
240 rdma_link_register(&rxe_link_ops);
241 pr_info("loaded\n");
242 return 0;
243 }
244
rxe_module_exit(void)245 static void __exit rxe_module_exit(void)
246 {
247 rdma_link_unregister(&rxe_link_ops);
248 ib_unregister_driver(RDMA_DRIVER_RXE);
249 rxe_net_exit();
250 rxe_destroy_wq();
251
252 pr_info("unloaded\n");
253 }
254
255 late_initcall(rxe_module_init);
256 module_exit(rxe_module_exit);
257
258 MODULE_ALIAS_RDMA_LINK("rxe");
259