1 /*******************************************************************
2 * This file is part of the Emulex RoCE Device Driver for *
3 * RoCE (RDMA over Converged Ethernet) adapters. *
4 * Copyright (C) 2008-2012 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
19 *
20 * Contact Information:
21 * linux-drivers@emulex.com
22 *
23 * Emulex
24 * 3333 Susan Street
25 * Costa Mesa, CA 92626
26 *******************************************************************/
27
28 #include <net/neighbour.h>
29 #include <net/netevent.h>
30
31 #include <rdma/ib_addr.h>
32 #include <rdma/ib_mad.h>
33
34 #include "ocrdma.h"
35 #include "ocrdma_verbs.h"
36 #include "ocrdma_ah.h"
37 #include "ocrdma_hw.h"
38 #include "ocrdma_stats.h"
39
40 #define OCRDMA_VID_PCP_SHIFT 0xD
41
set_av_attr(struct ocrdma_dev * dev,struct ocrdma_ah * ah,struct ib_ah_attr * attr,union ib_gid * sgid,int pdid,bool * isvlan)42 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
43 struct ib_ah_attr *attr, union ib_gid *sgid,
44 int pdid, bool *isvlan)
45 {
46 int status = 0;
47 u16 vlan_tag;
48 struct ocrdma_eth_vlan eth;
49 struct ocrdma_grh grh;
50 int eth_sz;
51
52 memset(ð, 0, sizeof(eth));
53 memset(&grh, 0, sizeof(grh));
54
55 /* VLAN */
56 vlan_tag = attr->vlan_id;
57 if (!vlan_tag || (vlan_tag > 0xFFF))
58 vlan_tag = dev->pvid;
59 if (vlan_tag || dev->pfc_state) {
60 if (!vlan_tag) {
61 pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
62 dev->id);
63 pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
64 dev->id);
65 }
66 eth.eth_type = cpu_to_be16(0x8100);
67 eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
68 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
69 eth.vlan_tag = cpu_to_be16(vlan_tag);
70 eth_sz = sizeof(struct ocrdma_eth_vlan);
71 *isvlan = true;
72 } else {
73 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
74 eth_sz = sizeof(struct ocrdma_eth_basic);
75 }
76 /* MAC */
77 memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
78 status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]);
79 if (status)
80 return status;
81 ah->sgid_index = attr->grh.sgid_index;
82 memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
83 memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw));
84
85 grh.tclass_flow = cpu_to_be32((6 << 28) |
86 (attr->grh.traffic_class << 24) |
87 attr->grh.flow_label);
88 /* 0x1b is next header value in GRH */
89 grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
90 (0x1b << 8) | attr->grh.hop_limit);
91 /* Eth HDR */
92 memcpy(&ah->av->eth_hdr, ð, eth_sz);
93 memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
94 if (*isvlan)
95 ah->av->valid |= OCRDMA_AV_VLAN_VALID;
96 ah->av->valid = cpu_to_le32(ah->av->valid);
97 return status;
98 }
99
ocrdma_create_ah(struct ib_pd * ibpd,struct ib_ah_attr * attr)100 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
101 {
102 u32 *ahid_addr;
103 bool isvlan = false;
104 int status;
105 struct ocrdma_ah *ah;
106 struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
107 struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
108 union ib_gid sgid;
109
110 if (!(attr->ah_flags & IB_AH_GRH))
111 return ERR_PTR(-EINVAL);
112
113 if (atomic_cmpxchg(&dev->update_sl, 1, 0))
114 ocrdma_init_service_level(dev);
115 ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
116 if (!ah)
117 return ERR_PTR(-ENOMEM);
118
119 status = ocrdma_alloc_av(dev, ah);
120 if (status)
121 goto av_err;
122
123 status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid);
124 if (status) {
125 pr_err("%s(): Failed to query sgid, status = %d\n",
126 __func__, status);
127 goto av_conf_err;
128 }
129
130 if ((pd->uctx) &&
131 (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
132 (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
133 status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
134 attr->dmac, &attr->vlan_id);
135 if (status) {
136 pr_err("%s(): Failed to resolve dmac from gid."
137 "status = %d\n", __func__, status);
138 goto av_conf_err;
139 }
140 }
141
142 status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan);
143 if (status)
144 goto av_conf_err;
145
146 /* if pd is for the user process, pass the ah_id to user space */
147 if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
148 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
149 *ahid_addr = 0;
150 *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
151 if (isvlan)
152 *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
153 OCRDMA_AH_VLAN_VALID_SHIFT);
154 }
155
156 return &ah->ibah;
157
158 av_conf_err:
159 ocrdma_free_av(dev, ah);
160 av_err:
161 kfree(ah);
162 return ERR_PTR(status);
163 }
164
ocrdma_destroy_ah(struct ib_ah * ibah)165 int ocrdma_destroy_ah(struct ib_ah *ibah)
166 {
167 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
168 struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
169
170 ocrdma_free_av(dev, ah);
171 kfree(ah);
172 return 0;
173 }
174
ocrdma_query_ah(struct ib_ah * ibah,struct ib_ah_attr * attr)175 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
176 {
177 struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
178 struct ocrdma_av *av = ah->av;
179 struct ocrdma_grh *grh;
180 attr->ah_flags |= IB_AH_GRH;
181 if (ah->av->valid & OCRDMA_AV_VALID) {
182 grh = (struct ocrdma_grh *)((u8 *)ah->av +
183 sizeof(struct ocrdma_eth_vlan));
184 attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
185 } else {
186 grh = (struct ocrdma_grh *)((u8 *)ah->av +
187 sizeof(struct ocrdma_eth_basic));
188 attr->sl = 0;
189 }
190 memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
191 attr->grh.sgid_index = ah->sgid_index;
192 attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
193 attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
194 attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
195 return 0;
196 }
197
ocrdma_modify_ah(struct ib_ah * ibah,struct ib_ah_attr * attr)198 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
199 {
200 /* modify_ah is unsupported */
201 return -ENOSYS;
202 }
203
ocrdma_process_mad(struct ib_device * ibdev,int process_mad_flags,u8 port_num,struct ib_wc * in_wc,struct ib_grh * in_grh,struct ib_mad * in_mad,struct ib_mad * out_mad)204 int ocrdma_process_mad(struct ib_device *ibdev,
205 int process_mad_flags,
206 u8 port_num,
207 struct ib_wc *in_wc,
208 struct ib_grh *in_grh,
209 struct ib_mad *in_mad, struct ib_mad *out_mad)
210 {
211 int status;
212 struct ocrdma_dev *dev;
213
214 switch (in_mad->mad_hdr.mgmt_class) {
215 case IB_MGMT_CLASS_PERF_MGMT:
216 dev = get_ocrdma_dev(ibdev);
217 if (!ocrdma_pma_counters(dev, out_mad))
218 status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
219 else
220 status = IB_MAD_RESULT_SUCCESS;
221 break;
222 default:
223 status = IB_MAD_RESULT_SUCCESS;
224 break;
225 }
226 return status;
227 }
228