summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
blob: cd66e1e45dd7c00beb6ce5bf50b7f400f07639d0 (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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
/* This file is part of the Emulex RoCE Device Driver for
 * RoCE (RDMA over Converged Ethernet) adapters.
 * Copyright (C) 2012-2015 Emulex. All rights reserved.
 * EMULEX and SLI are trademarks of Emulex.
 * www.emulex.com
 *
 * This software is available to you under a choice of one of two licenses.
 * You may choose to be licensed under the terms of the GNU General Public
 * License (GPL) Version 2, available from the file COPYING in the main
 * directory of this source tree, or the BSD license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#include <net/neighbour.h>
#include <net/netevent.h>

#include <rdma/ib_addr.h>
#include <rdma/ib_mad.h>
#include <rdma/ib_cache.h>

#include "ocrdma.h"
#include "ocrdma_verbs.h"
#include "ocrdma_ah.h"
#include "ocrdma_hw.h"
#include "ocrdma_stats.h"

#define OCRDMA_VID_PCP_SHIFT	0xD

static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
{
	switch (hdr_type) {
	case OCRDMA_L3_TYPE_IB_GRH:
		return (u16)ETH_P_IBOE;
	case OCRDMA_L3_TYPE_IPV4:
		return (u16)0x0800;
	case OCRDMA_L3_TYPE_IPV6:
		return (u16)0x86dd;
	default:
		pr_err("ocrdma%d: Invalid network header\n", devid);
		return 0;
	}
}

static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
			struct ib_ah_attr *attr, union ib_gid *sgid,
			int pdid, bool *isvlan, u16 vlan_tag)
{
	int status;
	struct ocrdma_eth_vlan eth;
	struct ocrdma_grh grh;
	int eth_sz;
	u16 proto_num = 0;
	u8 nxthdr = 0x11;
	struct iphdr ipv4;
	union {
		struct sockaddr     _sockaddr;
		struct sockaddr_in  _sockaddr_in;
		struct sockaddr_in6 _sockaddr_in6;
	} sgid_addr, dgid_addr;

	memset(&eth, 0, sizeof(eth));
	memset(&grh, 0, sizeof(grh));

	/* Protocol Number */
	proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
	if (!proto_num)
		return -EINVAL;
	nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;
	/* VLAN */
	if (!vlan_tag || (vlan_tag > 0xFFF))
		vlan_tag = dev->pvid;
	if (vlan_tag || dev->pfc_state) {
		if (!vlan_tag) {
			pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
				dev->id);
			pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
				dev->id);
		}
		eth.eth_type = cpu_to_be16(0x8100);
		eth.roce_eth_type = cpu_to_be16(proto_num);
		vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
		eth.vlan_tag = cpu_to_be16(vlan_tag);
		eth_sz = sizeof(struct ocrdma_eth_vlan);
		*isvlan = true;
	} else {
		eth.eth_type = cpu_to_be16(proto_num);
		eth_sz = sizeof(struct ocrdma_eth_basic);
	}
	/* MAC */
	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
	if (status)
		return status;
	ah->sgid_index = attr->grh.sgid_index;
	/* Eth HDR */
	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
	if (ah->hdr_type == RDMA_NETWORK_IPV4) {
		*((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
					   attr->grh.traffic_class);
		ipv4.id = cpu_to_be16(pdid);
		ipv4.frag_off = htons(IP_DF);
		ipv4.tot_len = htons(0);
		ipv4.ttl = attr->grh.hop_limit;
		ipv4.protocol = nxthdr;
		rdma_gid2ip(&sgid_addr._sockaddr, sgid);
		ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
		rdma_gid2ip(&dgid_addr._sockaddr, &attr->grh.dgid);
		ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
		memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
	} else {
		memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
		grh.tclass_flow = cpu_to_be32((6 << 28) |
					      (attr->grh.traffic_class << 24) |
					      attr->grh.flow_label);
		memcpy(&grh.dgid[0], attr->grh.dgid.raw,
		       sizeof(attr->grh.dgid.raw));
		grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
						(nxthdr << 8) |
						attr->grh.hop_limit);
		memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
	}
	if (*isvlan)
		ah->av->valid |= OCRDMA_AV_VLAN_VALID;
	ah->av->valid = cpu_to_le32(ah->av->valid);
	return status;
}

struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr,
			       struct ib_udata *udata)
{
	u32 *ahid_addr;
	int status;
	struct ocrdma_ah *ah;
	bool isvlan = false;
	u16 vlan_tag = 0xffff;
	struct ib_gid_attr sgid_attr;
	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
	union ib_gid sgid;

	if (!(attr->ah_flags & IB_AH_GRH))
		return ERR_PTR(-EINVAL);

	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
		ocrdma_init_service_level(dev);

	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
	if (!ah)
		return ERR_PTR(-ENOMEM);

	status = ocrdma_alloc_av(dev, ah);
	if (status)
		goto av_err;

	status = ib_get_cached_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid,
				   &sgid_attr);
	if (status) {
		pr_err("%s(): Failed to query sgid, status = %d\n",
		      __func__, status);
		goto av_conf_err;
	}
	if (sgid_attr.ndev) {
		if (is_vlan_dev(sgid_attr.ndev))
			vlan_tag = vlan_dev_vlan_id(sgid_attr.ndev);
		dev_put(sgid_attr.ndev);
	}
	/* Get network header type for this GID */
	ah->hdr_type = ib_gid_to_network_type(sgid_attr.gid_type, &sgid);

	if ((pd->uctx) &&
	    (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
	    (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
		status = rdma_addr_find_l2_eth_by_grh(&sgid, &attr->grh.dgid,
						      attr->dmac, &vlan_tag,
						      &sgid_attr.ndev->ifindex,
						      NULL);
		if (status) {
			pr_err("%s(): Failed to resolve dmac from gid." 
				"status = %d\n", __func__, status);
			goto av_conf_err;
		}
	}

	status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan, vlan_tag);
	if (status)
		goto av_conf_err;

	/* if pd is for the user process, pass the ah_id to user space */
	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
		ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
		*ahid_addr = 0;
		*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
		if (ocrdma_is_udp_encap_supported(dev)) {
			*ahid_addr |= ((u32)ah->hdr_type &
				       OCRDMA_AH_L3_TYPE_MASK) <<
				       OCRDMA_AH_L3_TYPE_SHIFT;
		}
		if (isvlan)
			*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
				       OCRDMA_AH_VLAN_VALID_SHIFT);
	}

	return &ah->ibah;

av_conf_err:
	ocrdma_free_av(dev, ah);
av_err:
	kfree(ah);
	return ERR_PTR(status);
}

int ocrdma_destroy_ah(struct ib_ah *ibah)
{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);

	ocrdma_free_av(dev, ah);
	kfree(ah);
	return 0;
}

int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_av *av = ah->av;
	struct ocrdma_grh *grh;
	attr->ah_flags |= IB_AH_GRH;
	if (ah->av->valid & OCRDMA_AV_VALID) {
		grh = (struct ocrdma_grh *)((u8 *)ah->av +
				sizeof(struct ocrdma_eth_vlan));
		attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
	} else {
		grh = (struct ocrdma_grh *)((u8 *)ah->av +
					sizeof(struct ocrdma_eth_basic));
		attr->sl = 0;
	}
	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
	attr->grh.sgid_index = ah->sgid_index;
	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
	return 0;
}

int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
{
	/* modify_ah is unsupported */
	return -ENOSYS;
}

int ocrdma_process_mad(struct ib_device *ibdev,
		       int process_mad_flags,
		       u8 port_num,
		       const struct ib_wc *in_wc,
		       const struct ib_grh *in_grh,
		       const struct ib_mad_hdr *in, size_t in_mad_size,
		       struct ib_mad_hdr *out, size_t *out_mad_size,
		       u16 *out_mad_pkey_index)
{
	int status;
	struct ocrdma_dev *dev;
	const struct ib_mad *in_mad = (const struct ib_mad *)in;
	struct ib_mad *out_mad = (struct ib_mad *)out;

	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
			 *out_mad_size != sizeof(*out_mad)))
		return IB_MAD_RESULT_FAILURE;

	switch (in_mad->mad_hdr.mgmt_class) {
	case IB_MGMT_CLASS_PERF_MGMT:
		dev = get_ocrdma_dev(ibdev);
		if (!ocrdma_pma_counters(dev, out_mad))
			status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
		else
			status = IB_MAD_RESULT_SUCCESS;
		break;
	default:
		status = IB_MAD_RESULT_SUCCESS;
		break;
	}
	return status;
}