summaryrefslogtreecommitdiff
path: root/drivers/infiniband/sw/rxe/rxe.c
blob: 255677bc12b2ab4006f7dd4b6a9f39ae5336ecb4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */

#include <rdma/rdma_netlink.h>
#include <net/addrconf.h>
#include "rxe.h"
#include "rxe_loc.h"

MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
MODULE_DESCRIPTION("Soft RDMA transport");
MODULE_LICENSE("Dual BSD/GPL");

/* free resources for a rxe device all objects created for this device must
 * have been destroyed
 */
void rxe_dealloc(struct ib_device *ib_dev)
{
	struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);

	rxe_pool_cleanup(&rxe->uc_pool);
	rxe_pool_cleanup(&rxe->pd_pool);
	rxe_pool_cleanup(&rxe->ah_pool);
	rxe_pool_cleanup(&rxe->srq_pool);
	rxe_pool_cleanup(&rxe->qp_pool);
	rxe_pool_cleanup(&rxe->cq_pool);
	rxe_pool_cleanup(&rxe->mr_pool);
	rxe_pool_cleanup(&rxe->mw_pool);

	WARN_ON(!RB_EMPTY_ROOT(&rxe->mcg_tree));

	if (rxe->tfm)
		crypto_free_shash(rxe->tfm);

	mutex_destroy(&rxe->usdev_lock);
}

/* initialize rxe device parameters */
static void rxe_init_device_param(struct rxe_dev *rxe)
{
	rxe->max_inline_data			= RXE_MAX_INLINE_DATA;

	rxe->attr.vendor_id			= RXE_VENDOR_ID;
	rxe->attr.max_mr_size			= RXE_MAX_MR_SIZE;
	rxe->attr.page_size_cap			= RXE_PAGE_SIZE_CAP;
	rxe->attr.max_qp			= RXE_MAX_QP;
	rxe->attr.max_qp_wr			= RXE_MAX_QP_WR;
	rxe->attr.device_cap_flags		= RXE_DEVICE_CAP_FLAGS;
	rxe->attr.kernel_cap_flags		= IBK_ALLOW_USER_UNREG;
	rxe->attr.max_send_sge			= RXE_MAX_SGE;
	rxe->attr.max_recv_sge			= RXE_MAX_SGE;
	rxe->attr.max_sge_rd			= RXE_MAX_SGE_RD;
	rxe->attr.max_cq			= RXE_MAX_CQ;
	rxe->attr.max_cqe			= (1 << RXE_MAX_LOG_CQE) - 1;
	rxe->attr.max_mr			= RXE_MAX_MR;
	rxe->attr.max_mw			= RXE_MAX_MW;
	rxe->attr.max_pd			= RXE_MAX_PD;
	rxe->attr.max_qp_rd_atom		= RXE_MAX_QP_RD_ATOM;
	rxe->attr.max_res_rd_atom		= RXE_MAX_RES_RD_ATOM;
	rxe->attr.max_qp_init_rd_atom		= RXE_MAX_QP_INIT_RD_ATOM;
	rxe->attr.atomic_cap			= IB_ATOMIC_HCA;
	rxe->attr.max_mcast_grp			= RXE_MAX_MCAST_GRP;
	rxe->attr.max_mcast_qp_attach		= RXE_MAX_MCAST_QP_ATTACH;
	rxe->attr.max_total_mcast_qp_attach	= RXE_MAX_TOT_MCAST_QP_ATTACH;
	rxe->attr.max_ah			= RXE_MAX_AH;
	rxe->attr.max_srq			= RXE_MAX_SRQ;
	rxe->attr.max_srq_wr			= RXE_MAX_SRQ_WR;
	rxe->attr.max_srq_sge			= RXE_MAX_SRQ_SGE;
	rxe->attr.max_fast_reg_page_list_len	= RXE_MAX_FMR_PAGE_LIST_LEN;
	rxe->attr.max_pkeys			= RXE_MAX_PKEYS;
	rxe->attr.local_ca_ack_delay		= RXE_LOCAL_CA_ACK_DELAY;
	addrconf_addr_eui48((unsigned char *)&rxe->attr.sys_image_guid,
			rxe->ndev->dev_addr);

	rxe->max_ucontext			= RXE_MAX_UCONTEXT;
}

/* initialize port attributes */
static void rxe_init_port_param(struct rxe_port *port)
{
	port->attr.state		= IB_PORT_DOWN;
	port->attr.max_mtu		= IB_MTU_4096;
	port->attr.active_mtu		= IB_MTU_256;
	port->attr.gid_tbl_len		= RXE_PORT_GID_TBL_LEN;
	port->attr.port_cap_flags	= RXE_PORT_PORT_CAP_FLAGS;
	port->attr.max_msg_sz		= RXE_PORT_MAX_MSG_SZ;
	port->attr.bad_pkey_cntr	= RXE_PORT_BAD_PKEY_CNTR;
	port->attr.qkey_viol_cntr	= RXE_PORT_QKEY_VIOL_CNTR;
	port->attr.pkey_tbl_len		= RXE_PORT_PKEY_TBL_LEN;
	port->attr.lid			= RXE_PORT_LID;
	port->attr.sm_lid		= RXE_PORT_SM_LID;
	port->attr.lmc			= RXE_PORT_LMC;
	port->attr.max_vl_num		= RXE_PORT_MAX_VL_NUM;
	port->attr.sm_sl		= RXE_PORT_SM_SL;
	port->attr.subnet_timeout	= RXE_PORT_SUBNET_TIMEOUT;
	port->attr.init_type_reply	= RXE_PORT_INIT_TYPE_REPLY;
	port->attr.active_width		= RXE_PORT_ACTIVE_WIDTH;
	port->attr.active_speed		= RXE_PORT_ACTIVE_SPEED;
	port->attr.phys_state		= RXE_PORT_PHYS_STATE;
	port->mtu_cap			= ib_mtu_enum_to_int(IB_MTU_256);
	port->subnet_prefix		= cpu_to_be64(RXE_PORT_SUBNET_PREFIX);
}

/* initialize port state, note IB convention that HCA ports are always
 * numbered from 1
 */
static void rxe_init_ports(struct rxe_dev *rxe)
{
	struct rxe_port *port = &rxe->port;

	rxe_init_port_param(port);
	addrconf_addr_eui48((unsigned char *)&port->port_guid,
			    rxe->ndev->dev_addr);
	spin_lock_init(&port->port_lock);
}

/* init pools of managed objects */
static void rxe_init_pools(struct rxe_dev *rxe)
{
	rxe_pool_init(rxe, &rxe->uc_pool, RXE_TYPE_UC);
	rxe_pool_init(rxe, &rxe->pd_pool, RXE_TYPE_PD);
	rxe_pool_init(rxe, &rxe->ah_pool, RXE_TYPE_AH);
	rxe_pool_init(rxe, &rxe->srq_pool, RXE_TYPE_SRQ);
	rxe_pool_init(rxe, &rxe->qp_pool, RXE_TYPE_QP);
	rxe_pool_init(rxe, &rxe->cq_pool, RXE_TYPE_CQ);
	rxe_pool_init(rxe, &rxe->mr_pool, RXE_TYPE_MR);
	rxe_pool_init(rxe, &rxe->mw_pool, RXE_TYPE_MW);
}

/* initialize rxe device state */
static void rxe_init(struct rxe_dev *rxe)
{
	/* init default device parameters */
	rxe_init_device_param(rxe);

	rxe_init_ports(rxe);
	rxe_init_pools(rxe);

	/* init pending mmap list */
	spin_lock_init(&rxe->mmap_offset_lock);
	spin_lock_init(&rxe->pending_lock);
	INIT_LIST_HEAD(&rxe->pending_mmaps);

	/* init multicast support */
	spin_lock_init(&rxe->mcg_lock);
	rxe->mcg_tree = RB_ROOT;

	mutex_init(&rxe->usdev_lock);
}

void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
{
	struct rxe_port *port = &rxe->port;
	enum ib_mtu mtu;

	mtu = eth_mtu_int_to_enum(ndev_mtu);

	/* Make sure that new MTU in range */
	mtu = mtu ? min_t(enum ib_mtu, mtu, IB_MTU_4096) : IB_MTU_256;

	port->attr.active_mtu = mtu;
	port->mtu_cap = ib_mtu_enum_to_int(mtu);
}

/* called by ifc layer to create new rxe device.
 * The caller should allocate memory for rxe by calling ib_alloc_device.
 */
int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
{
	rxe_init(rxe);
	rxe_set_mtu(rxe, mtu);

	return rxe_register_device(rxe, ibdev_name);
}

static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
{
	struct rxe_dev *rxe;
	int err = 0;

	if (is_vlan_dev(ndev)) {
		rxe_err("rxe creation allowed on top of a real device only\n");
		err = -EPERM;
		goto err;
	}

	rxe = rxe_get_dev_from_net(ndev);
	if (rxe) {
		ib_device_put(&rxe->ib_dev);
		rxe_err_dev(rxe, "already configured on %s\n", ndev->name);
		err = -EEXIST;
		goto err;
	}

	err = rxe_net_add(ibdev_name, ndev);
	if (err) {
		rxe_err("failed to add %s\n", ndev->name);
		goto err;
	}
err:
	return err;
}

static struct rdma_link_ops rxe_link_ops = {
	.type = "rxe",
	.newlink = rxe_newlink,
};

static int __init rxe_module_init(void)
{
	int err;

	err = rxe_alloc_wq();
	if (err)
		return err;

	err = rxe_net_init();
	if (err) {
		rxe_destroy_wq();
		return err;
	}

	rdma_link_register(&rxe_link_ops);
	pr_info("loaded\n");
	return 0;
}

static void __exit rxe_module_exit(void)
{
	rdma_link_unregister(&rxe_link_ops);
	ib_unregister_driver(RDMA_DRIVER_RXE);
	rxe_net_exit();
	rxe_destroy_wq();

	pr_info("unloaded\n");
}

late_initcall(rxe_module_init);
module_exit(rxe_module_exit);

MODULE_ALIAS_RDMA_LINK("rxe");