1 /*
2 * IBM eServer eHCA Infiniband device driver for Linux on POWER
3 *
4 * mcast functions
5 *
6 * Authors: Khadija Souissi <souissik@de.ibm.com>
7 * Waleri Fomin <fomin@de.ibm.com>
8 * Reinhard Ernst <rernst@de.ibm.com>
9 * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
10 * Heiko J Schick <schickhj@de.ibm.com>
11 *
12 * Copyright (c) 2005 IBM Corporation
13 *
14 * All rights reserved.
15 *
16 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
17 * BSD.
18 *
19 * OpenIB BSD License
20 *
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions are met:
23 *
24 * Redistributions of source code must retain the above copyright notice, this
25 * list of conditions and the following disclaimer.
26 *
27 * Redistributions in binary form must reproduce the above copyright notice,
28 * this list of conditions and the following disclaimer in the documentation
29 * and/or other materials
30 * provided with the distribution.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
33 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
36 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
37 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
39 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
40 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGE.
43 */
44
45 #include <linux/module.h>
46 #include <linux/err.h>
47 #include "ehca_classes.h"
48 #include "ehca_tools.h"
49 #include "ehca_qes.h"
50 #include "ehca_iverbs.h"
51 #include "hcp_if.h"
52
53 #define MAX_MC_LID 0xFFFE
54 #define MIN_MC_LID 0xC000 /* Multicast limits */
55 #define EHCA_VALID_MULTICAST_GID(gid) ((gid)[0] == 0xFF)
56 #define EHCA_VALID_MULTICAST_LID(lid) \
57 (((lid) >= MIN_MC_LID) && ((lid) <= MAX_MC_LID))
58
ehca_attach_mcast(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)59 int ehca_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
60 {
61 struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
62 struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
63 ib_device);
64 union ib_gid my_gid;
65 u64 subnet_prefix, interface_id, h_ret;
66
67 if (ibqp->qp_type != IB_QPT_UD) {
68 ehca_err(ibqp->device, "invalid qp_type=%x", ibqp->qp_type);
69 return -EINVAL;
70 }
71
72 if (!(EHCA_VALID_MULTICAST_GID(gid->raw))) {
73 ehca_err(ibqp->device, "invalid mulitcast gid");
74 return -EINVAL;
75 } else if ((lid < MIN_MC_LID) || (lid > MAX_MC_LID)) {
76 ehca_err(ibqp->device, "invalid mulitcast lid=%x", lid);
77 return -EINVAL;
78 }
79
80 memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
81
82 subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
83 interface_id = be64_to_cpu(my_gid.global.interface_id);
84 h_ret = hipz_h_attach_mcqp(shca->ipz_hca_handle,
85 my_qp->ipz_qp_handle,
86 my_qp->galpas.kernel,
87 lid, subnet_prefix, interface_id);
88 if (h_ret != H_SUCCESS)
89 ehca_err(ibqp->device,
90 "ehca_qp=%p qp_num=%x hipz_h_attach_mcqp() failed "
91 "h_ret=%lli", my_qp, ibqp->qp_num, h_ret);
92
93 return ehca2ib_return_code(h_ret);
94 }
95
ehca_detach_mcast(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)96 int ehca_detach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
97 {
98 struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
99 struct ehca_shca *shca = container_of(ibqp->pd->device,
100 struct ehca_shca, ib_device);
101 union ib_gid my_gid;
102 u64 subnet_prefix, interface_id, h_ret;
103
104 if (ibqp->qp_type != IB_QPT_UD) {
105 ehca_err(ibqp->device, "invalid qp_type %x", ibqp->qp_type);
106 return -EINVAL;
107 }
108
109 if (!(EHCA_VALID_MULTICAST_GID(gid->raw))) {
110 ehca_err(ibqp->device, "invalid mulitcast gid");
111 return -EINVAL;
112 } else if ((lid < MIN_MC_LID) || (lid > MAX_MC_LID)) {
113 ehca_err(ibqp->device, "invalid mulitcast lid=%x", lid);
114 return -EINVAL;
115 }
116
117 memcpy(&my_gid.raw, gid->raw, sizeof(union ib_gid));
118
119 subnet_prefix = be64_to_cpu(my_gid.global.subnet_prefix);
120 interface_id = be64_to_cpu(my_gid.global.interface_id);
121 h_ret = hipz_h_detach_mcqp(shca->ipz_hca_handle,
122 my_qp->ipz_qp_handle,
123 my_qp->galpas.kernel,
124 lid, subnet_prefix, interface_id);
125 if (h_ret != H_SUCCESS)
126 ehca_err(ibqp->device,
127 "ehca_qp=%p qp_num=%x hipz_h_detach_mcqp() failed "
128 "h_ret=%lli", my_qp, ibqp->qp_num, h_ret);
129
130 return ehca2ib_return_code(h_ret);
131 }
132