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
12MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
13MODULE_DESCRIPTION("Soft RDMA transport");
14MODULE_LICENSE("Dual BSD/GPL");
15
16bool rxe_initialized;
17
18/* free resources for a rxe device all objects created for this device must
19 * have been destroyed
20 */
21void 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 */
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.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 */
79static 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 */
107static 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 */
118static 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
174err10:
175	rxe_pool_cleanup(&rxe->mc_grp_pool);
176err9:
177	rxe_pool_cleanup(&rxe->mw_pool);
178err8:
179	rxe_pool_cleanup(&rxe->mr_pool);
180err7:
181	rxe_pool_cleanup(&rxe->cq_pool);
182err6:
183	rxe_pool_cleanup(&rxe->qp_pool);
184err5:
185	rxe_pool_cleanup(&rxe->srq_pool);
186err4:
187	rxe_pool_cleanup(&rxe->ah_pool);
188err3:
189	rxe_pool_cleanup(&rxe->pd_pool);
190err2:
191	rxe_pool_cleanup(&rxe->uc_pool);
192err1:
193	return err;
194}
195
196/* initialize rxe device state */
197static 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
220void 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 */
237int 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
250static 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	}
274err:
275	return err;
276}
277
278static struct rdma_link_ops rxe_link_ops = {
279	.type = "rxe",
280	.newlink = rxe_newlink,
281};
282
283static 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
297static 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
307late_initcall(rxe_module_init);
308module_exit(rxe_module_exit);
309
310MODULE_ALIAS_RDMA_LINK("rxe");
311