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fe2caefc PP |
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> | |
fe2caefc PP |
32 | |
33 | #include "ocrdma.h" | |
34 | #include "ocrdma_verbs.h" | |
35 | #include "ocrdma_ah.h" | |
36 | #include "ocrdma_hw.h" | |
37 | ||
1afc0454 | 38 | static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah, |
fe2caefc PP |
39 | struct ib_ah_attr *attr, int pdid) |
40 | { | |
41 | int status = 0; | |
42 | u16 vlan_tag; bool vlan_enabled = false; | |
fe2caefc PP |
43 | struct ocrdma_eth_vlan eth; |
44 | struct ocrdma_grh grh; | |
45 | int eth_sz; | |
46 | ||
47 | memset(ð, 0, sizeof(eth)); | |
48 | memset(&grh, 0, sizeof(grh)); | |
49 | ||
50 | ah->sgid_index = attr->grh.sgid_index; | |
51 | ||
40aca6ff | 52 | vlan_tag = attr->vlan_id; |
84b105db NG |
53 | if (!vlan_tag || (vlan_tag > 0xFFF)) |
54 | vlan_tag = dev->pvid; | |
fe2caefc PP |
55 | if (vlan_tag && (vlan_tag < 0x1000)) { |
56 | eth.eth_type = cpu_to_be16(0x8100); | |
57 | eth.roce_eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); | |
58 | vlan_tag |= (attr->sl & 7) << 13; | |
59 | eth.vlan_tag = cpu_to_be16(vlan_tag); | |
60 | eth_sz = sizeof(struct ocrdma_eth_vlan); | |
61 | vlan_enabled = true; | |
62 | } else { | |
63 | eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE); | |
64 | eth_sz = sizeof(struct ocrdma_eth_basic); | |
65 | } | |
66 | memcpy(ð.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN); | |
40aca6ff MS |
67 | memcpy(ð.dmac[0], attr->dmac, ETH_ALEN); |
68 | status = ocrdma_resolve_dmac(dev, attr, ð.dmac[0]); | |
fe2caefc PP |
69 | if (status) |
70 | return status; | |
71 | status = ocrdma_query_gid(&dev->ibdev, 1, attr->grh.sgid_index, | |
72 | (union ib_gid *)&grh.sgid[0]); | |
73 | if (status) | |
74 | return status; | |
75 | ||
76 | grh.tclass_flow = cpu_to_be32((6 << 28) | | |
77 | (attr->grh.traffic_class << 24) | | |
78 | attr->grh.flow_label); | |
79 | /* 0x1b is next header value in GRH */ | |
80 | grh.pdid_hoplimit = cpu_to_be32((pdid << 16) | | |
81 | (0x1b << 8) | attr->grh.hop_limit); | |
82 | ||
83 | memcpy(&grh.dgid[0], attr->grh.dgid.raw, sizeof(attr->grh.dgid.raw)); | |
84 | memcpy(&ah->av->eth_hdr, ð, eth_sz); | |
85 | memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh)); | |
86 | if (vlan_enabled) | |
87 | ah->av->valid |= OCRDMA_AV_VLAN_VALID; | |
88 | return status; | |
89 | } | |
90 | ||
91 | struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr) | |
92 | { | |
93 | u32 *ahid_addr; | |
94 | int status; | |
95 | struct ocrdma_ah *ah; | |
96 | struct ocrdma_pd *pd = get_ocrdma_pd(ibpd); | |
f99b1649 | 97 | struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device); |
fe2caefc PP |
98 | |
99 | if (!(attr->ah_flags & IB_AH_GRH)) | |
100 | return ERR_PTR(-EINVAL); | |
101 | ||
102 | ah = kzalloc(sizeof *ah, GFP_ATOMIC); | |
103 | if (!ah) | |
104 | return ERR_PTR(-ENOMEM); | |
fe2caefc PP |
105 | |
106 | status = ocrdma_alloc_av(dev, ah); | |
107 | if (status) | |
108 | goto av_err; | |
1afc0454 | 109 | status = set_av_attr(dev, ah, attr, pd->id); |
fe2caefc PP |
110 | if (status) |
111 | goto av_conf_err; | |
112 | ||
113 | /* if pd is for the user process, pass the ah_id to user space */ | |
114 | if ((pd->uctx) && (pd->uctx->ah_tbl.va)) { | |
115 | ahid_addr = pd->uctx->ah_tbl.va + attr->dlid; | |
116 | *ahid_addr = ah->id; | |
117 | } | |
118 | return &ah->ibah; | |
119 | ||
120 | av_conf_err: | |
121 | ocrdma_free_av(dev, ah); | |
122 | av_err: | |
123 | kfree(ah); | |
124 | return ERR_PTR(status); | |
125 | } | |
126 | ||
127 | int ocrdma_destroy_ah(struct ib_ah *ibah) | |
128 | { | |
129 | struct ocrdma_ah *ah = get_ocrdma_ah(ibah); | |
1afc0454 NG |
130 | struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device); |
131 | ||
132 | ocrdma_free_av(dev, ah); | |
fe2caefc PP |
133 | kfree(ah); |
134 | return 0; | |
135 | } | |
136 | ||
137 | int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) | |
138 | { | |
139 | struct ocrdma_ah *ah = get_ocrdma_ah(ibah); | |
140 | struct ocrdma_av *av = ah->av; | |
141 | struct ocrdma_grh *grh; | |
142 | attr->ah_flags |= IB_AH_GRH; | |
143 | if (ah->av->valid & Bit(1)) { | |
144 | grh = (struct ocrdma_grh *)((u8 *)ah->av + | |
145 | sizeof(struct ocrdma_eth_vlan)); | |
146 | attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13; | |
147 | } else { | |
148 | grh = (struct ocrdma_grh *)((u8 *)ah->av + | |
149 | sizeof(struct ocrdma_eth_basic)); | |
150 | attr->sl = 0; | |
151 | } | |
152 | memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid)); | |
153 | attr->grh.sgid_index = ah->sgid_index; | |
154 | attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff; | |
155 | attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24; | |
156 | attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr) | |
161 | { | |
162 | /* modify_ah is unsupported */ | |
163 | return -ENOSYS; | |
164 | } | |
165 | ||
166 | int ocrdma_process_mad(struct ib_device *ibdev, | |
167 | int process_mad_flags, | |
168 | u8 port_num, | |
169 | struct ib_wc *in_wc, | |
170 | struct ib_grh *in_grh, | |
171 | struct ib_mad *in_mad, struct ib_mad *out_mad) | |
172 | { | |
173 | return IB_MAD_RESULT_SUCCESS; | |
174 | } |