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 */
rxe_dealloc(struct ib_device * ib_dev)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 */
rxe_init_device_param(struct rxe_dev * rxe)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_mw = RXE_MAX_MW;
58 rxe->attr.max_pd = RXE_MAX_PD;
59 rxe->attr.max_qp_rd_atom = RXE_MAX_QP_RD_ATOM;
60 rxe->attr.max_res_rd_atom = RXE_MAX_RES_RD_ATOM;
61 rxe->attr.max_qp_init_rd_atom = RXE_MAX_QP_INIT_RD_ATOM;
62 rxe->attr.atomic_cap = IB_ATOMIC_HCA;
63 rxe->attr.max_mcast_grp = RXE_MAX_MCAST_GRP;
64 rxe->attr.max_mcast_qp_attach = RXE_MAX_MCAST_QP_ATTACH;
65 rxe->attr.max_total_mcast_qp_attach = RXE_MAX_TOT_MCAST_QP_ATTACH;
66 rxe->attr.max_ah = RXE_MAX_AH;
67 rxe->attr.max_srq = RXE_MAX_SRQ;
68 rxe->attr.max_srq_wr = RXE_MAX_SRQ_WR;
69 rxe->attr.max_srq_sge = RXE_MAX_SRQ_SGE;
70 rxe->attr.max_fast_reg_page_list_len = RXE_MAX_FMR_PAGE_LIST_LEN;
71 rxe->attr.max_pkeys = RXE_MAX_PKEYS;
72 rxe->attr.local_ca_ack_delay = RXE_LOCAL_CA_ACK_DELAY;
73 addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
74 rxe->ndev->dev_addr);
75
76 rxe->max_ucontext = RXE_MAX_UCONTEXT;
77 }
78
79 /* initialize port attributes */
rxe_init_port_param(struct rxe_port * port)80 static void rxe_init_port_param(struct rxe_port *port)
81 {
82 port->attr.state = IB_PORT_DOWN;
83 port->attr.max_mtu = IB_MTU_4096;
84 port->attr.active_mtu = IB_MTU_256;
85 port->attr.gid_tbl_len = RXE_PORT_GID_TBL_LEN;
86 port->attr.port_cap_flags = RXE_PORT_PORT_CAP_FLAGS;
87 port->attr.max_msg_sz = RXE_PORT_MAX_MSG_SZ;
88 port->attr.bad_pkey_cntr = RXE_PORT_BAD_PKEY_CNTR;
89 port->attr.qkey_viol_cntr = RXE_PORT_QKEY_VIOL_CNTR;
90 port->attr.pkey_tbl_len = RXE_PORT_PKEY_TBL_LEN;
91 port->attr.lid = RXE_PORT_LID;
92 port->attr.sm_lid = RXE_PORT_SM_LID;
93 port->attr.lmc = RXE_PORT_LMC;
94 port->attr.max_vl_num = RXE_PORT_MAX_VL_NUM;
95 port->attr.sm_sl = RXE_PORT_SM_SL;
96 port->attr.subnet_timeout = RXE_PORT_SUBNET_TIMEOUT;
97 port->attr.init_type_reply = RXE_PORT_INIT_TYPE_REPLY;
98 port->attr.active_width = RXE_PORT_ACTIVE_WIDTH;
99 port->attr.active_speed = RXE_PORT_ACTIVE_SPEED;
100 port->attr.phys_state = RXE_PORT_PHYS_STATE;
101 port->mtu_cap = ib_mtu_enum_to_int(IB_MTU_256);
102 port->subnet_prefix = cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
103 }
104
105 /* initialize port state, note IB convention that HCA ports are always
106 * numbered from 1
107 */
rxe_init_ports(struct rxe_dev * rxe)108 static void rxe_init_ports(struct rxe_dev *rxe)
109 {
110 struct rxe_port *port = &rxe->port;
111
112 rxe_init_port_param(port);
113 addrconf_addr_eui48((unsigned char *)&port->port_guid,
114 rxe->ndev->dev_addr);
115 spin_lock_init(&port->port_lock);
116 }
117
118 /* init pools of managed objects */
rxe_init_pools(struct rxe_dev * rxe)119 static int rxe_init_pools(struct rxe_dev *rxe)
120 {
121 int err;
122
123 err = rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC,
124 rxe->max_ucontext);
125 if (err)
126 goto err1;
127
128 err = rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD,
129 rxe->attr.max_pd);
130 if (err)
131 goto err2;
132
133 err = rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH,
134 rxe->attr.max_ah);
135 if (err)
136 goto err3;
137
138 err = rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ,
139 rxe->attr.max_srq);
140 if (err)
141 goto err4;
142
143 err = rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP,
144 rxe->attr.max_qp);
145 if (err)
146 goto err5;
147
148 err = rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ,
149 rxe->attr.max_cq);
150 if (err)
151 goto err6;
152
153 err = rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR,
154 rxe->attr.max_mr);
155 if (err)
156 goto err7;
157
158 err = rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW,
159 rxe->attr.max_mw);
160 if (err)
161 goto err8;
162
163 err = rxe_pool_init(rxe, &rxe->mc_grp_pool, RXE_TYPE_MC_GRP,
164 rxe->attr.max_mcast_grp);
165 if (err)
166 goto err9;
167
168 err = rxe_pool_init(rxe, &rxe->mc_elem_pool, RXE_TYPE_MC_ELEM,
169 rxe->attr.max_total_mcast_qp_attach);
170 if (err)
171 goto err10;
172
173 return 0;
174
175 err10:
176 rxe_pool_cleanup(&rxe->mc_grp_pool);
177 err9:
178 rxe_pool_cleanup(&rxe->mw_pool);
179 err8:
180 rxe_pool_cleanup(&rxe->mr_pool);
181 err7:
182 rxe_pool_cleanup(&rxe->cq_pool);
183 err6:
184 rxe_pool_cleanup(&rxe->qp_pool);
185 err5:
186 rxe_pool_cleanup(&rxe->srq_pool);
187 err4:
188 rxe_pool_cleanup(&rxe->ah_pool);
189 err3:
190 rxe_pool_cleanup(&rxe->pd_pool);
191 err2:
192 rxe_pool_cleanup(&rxe->uc_pool);
193 err1:
194 return err;
195 }
196
197 /* initialize rxe device state */
rxe_init(struct rxe_dev * rxe)198 static int rxe_init(struct rxe_dev *rxe)
199 {
200 int err;
201
202 /* init default device parameters */
203 rxe_init_device_param(rxe);
204
205 rxe_init_ports(rxe);
206
207 err = rxe_init_pools(rxe);
208 if (err)
209 return err;
210
211 /* init pending mmap list */
212 spin_lock_init(&rxe->mmap_offset_lock);
213 spin_lock_init(&rxe->pending_lock);
214 INIT_LIST_HEAD(&rxe->pending_mmaps);
215
216 mutex_init(&rxe->usdev_lock);
217
218 return 0;
219 }
220
rxe_set_mtu(struct rxe_dev * rxe,unsigned int ndev_mtu)221 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
222 {
223 struct rxe_port *port = &rxe->port;
224 enum ib_mtu mtu;
225
226 mtu = eth_mtu_int_to_enum(ndev_mtu);
227
228 /* Make sure that new MTU in range */
229 mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;
230
231 port->attr.active_mtu = mtu;
232 port->mtu_cap = ib_mtu_enum_to_int(mtu);
233 }
234
235 /* called by ifc layer to create new rxe device.
236 * The caller should allocate memory for rxe by calling ib_alloc_device.
237 */
rxe_add(struct rxe_dev * rxe,unsigned int mtu,const char * ibdev_name)238 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
239 {
240 int err;
241
242 err = rxe_init(rxe);
243 if (err)
244 return err;
245
246 rxe_set_mtu(rxe, mtu);
247
248 return rxe_register_device(rxe, ibdev_name);
249 }
250
rxe_newlink(const char * ibdev_name,struct net_device * ndev)251 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
252 {
253 struct rxe_dev *exists;
254 int err = 0;
255
256 if (is_vlan_dev(ndev)) {
257 pr_err("rxe creation allowed on top of a real device only\n");
258 err = -EPERM;
259 goto err;
260 }
261
262 exists = rxe_get_dev_from_net(ndev);
263 if (exists) {
264 ib_device_put(&exists->ib_dev);
265 pr_err("already configured on %s\n", ndev->name);
266 err = -EEXIST;
267 goto err;
268 }
269
270 err = rxe_net_add(ibdev_name, ndev);
271 if (err) {
272 pr_err("failed to add %s\n", ndev->name);
273 goto err;
274 }
275 err:
276 return err;
277 }
278
279 static struct rdma_link_ops rxe_link_ops = {
280 .type = "rxe",
281 .newlink = rxe_newlink,
282 };
283
rxe_module_init(void)284 static int __init rxe_module_init(void)
285 {
286 int err;
287
288 err = rxe_net_init();
289 if (err)
290 return err;
291
292 rdma_link_register(&rxe_link_ops);
293 rxe_initialized = true;
294 pr_info("loaded\n");
295 return 0;
296 }
297
rxe_module_exit(void)298 static void __exit rxe_module_exit(void)
299 {
300 rdma_link_unregister(&rxe_link_ops);
301 ib_unregister_driver(RDMA_DRIVER_RXE);
302 rxe_net_exit();
303
304 rxe_initialized = false;
305 pr_info("unloaded\n");
306 }
307
308 late_initcall(rxe_module_init);
309 module_exit(rxe_module_exit);
310
311 MODULE_ALIAS_RDMA_LINK("rxe");
312