aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/ehca/ehca_sqp.c
blob: c568b28f4e207416762c18c69d86f27818e9d530 (plain) (blame)
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
/*
 *  IBM eServer eHCA Infiniband device driver for Linux on POWER
 *
 *  SQP functions
 *
 *  Authors: Khadija Souissi <souissi@de.ibm.com>
 *           Heiko J Schick <schickhj@de.ibm.com>
 *
 *  Copyright (c) 2005 IBM Corporation
 *
 *  All rights reserved.
 *
 *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
 *  BSD.
 *
 * OpenIB BSD License
 *
 * 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 OWNER 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.
 */

#include <rdma/ib_mad.h>

#include "ehca_classes.h"
#include "ehca_tools.h"
#include "ehca_iverbs.h"
#include "hcp_if.h"

#define IB_MAD_STATUS_REDIRECT		cpu_to_be16(0x0002)
#define IB_MAD_STATUS_UNSUP_VERSION	cpu_to_be16(0x0004)
#define IB_MAD_STATUS_UNSUP_METHOD	cpu_to_be16(0x0008)

#define IB_PMA_CLASS_PORT_INFO		cpu_to_be16(0x0001)

/**
 * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
 * pair is created successfully, the corresponding port gets active.
 *
 * Define Special Queue pair 0 (SMI QP) is still not supported.
 *
 * @qp_init_attr: Queue pair init attributes with port and queue pair type
 */

u64 ehca_define_sqp(struct ehca_shca *shca,
		    struct ehca_qp *ehca_qp,
		    struct ib_qp_init_attr *qp_init_attr)
{
	u32 pma_qp_nr, bma_qp_nr;
	u64 ret;
	u8 port = qp_init_attr->port_num;
	int counter;

	shca->sport[port - 1].port_state = IB_PORT_DOWN;

	switch (qp_init_attr->qp_type) {
	case IB_QPT_SMI:
		/* function not supported yet */
		break;
	case IB_QPT_GSI:
		ret = hipz_h_define_aqp1(shca->ipz_hca_handle,
					 ehca_qp->ipz_qp_handle,
					 ehca_qp->galpas.kernel,
					 (u32) qp_init_attr->port_num,
					 &pma_qp_nr, &bma_qp_nr);

		if (ret != H_SUCCESS) {
			ehca_err(&shca->ib_device,
				 "Can't define AQP1 for port %x. h_ret=%lli",
				 port, ret);
			return ret;
		}
		shca->sport[port - 1].pma_qp_nr = pma_qp_nr;
		ehca_dbg(&shca->ib_device, "port=%x pma_qp_nr=%x",
			 port, pma_qp_nr);
		break;
	default:
		ehca_err(&shca->ib_device, "invalid qp_type=%x",
			 qp_init_attr->qp_type);
		return H_PARAMETER;
	}

	if (ehca_nr_ports < 0) /* autodetect mode */
		return H_SUCCESS;

	for (counter = 0;
	     shca->sport[port - 1].port_state != IB_PORT_ACTIVE &&
		     counter < ehca_port_act_time;
	     counter++) {
		ehca_dbg(&shca->ib_device, "... wait until port %x is active",
			 port);
		msleep_interruptible(1000);
	}

	if (counter == ehca_port_act_time) {
		ehca_err(&shca->ib_device, "Port %x is not active.", port);
		return H_HARDWARE;
	}

	return H_SUCCESS;
}

struct ib_perf {
	struct ib_mad_hdr mad_hdr;
	u8 reserved[40];
	u8 data[192];
} __attribute__ ((packed));


static int ehca_process_perf(struct ib_device *ibdev, u8 port_num,
			     struct ib_mad *in_mad, struct ib_mad *out_mad)
{
	struct ib_perf *in_perf = (struct ib_perf *)in_mad;
	struct ib_perf *out_perf = (struct ib_perf *)out_mad;
	struct ib_class_port_info *poi =
		(struct ib_class_port_info *)out_perf->data;
	struct ehca_shca *shca =
		container_of(ibdev, struct ehca_shca, ib_device);
	struct ehca_sport *sport = &shca->sport[port_num - 1];

	ehca_dbg(ibdev, "method=%x", in_perf->mad_hdr.method);

	*out_mad = *in_mad;

	if (in_perf->mad_hdr.class_version != 1) {
		ehca_warn(ibdev, "Unsupported class_version=%x",
			  in_perf->mad_hdr.class_version);
		out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_VERSION;
		goto perf_reply;
	}

	switch (in_perf->mad_hdr.method) {
	case IB_MGMT_METHOD_GET:
	case IB_MGMT_METHOD_SET:
		/* set class port info for redirection */
		out_perf->mad_hdr.attr_id = IB_PMA_CLASS_PORT_INFO;
		out_perf->mad_hdr.status = IB_MAD_STATUS_REDIRECT;
		memset(poi, 0, sizeof(*poi));
		poi->base_version = 1;
		poi->class_version = 1;
		poi->resp_time_value = 18;
		poi->redirect_lid = sport->saved_attr.lid;
		poi->redirect_qp = sport->pma_qp_nr;
		poi->redirect_qkey = IB_QP1_QKEY;
		poi->redirect_pkey = IB_DEFAULT_PKEY_FULL;

		ehca_dbg(ibdev, "ehca_pma_lid=%x ehca_pma_qp=%x",
			 sport->saved_attr.lid, sport->pma_qp_nr);
		break;

	case IB_MGMT_METHOD_GET_RESP:
		return IB_MAD_RESULT_FAILURE;

	default:
		out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_METHOD;
		break;
	}

perf_reply:
	out_perf->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;

	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}

int ehca_process_mad(struct ib_device *ibdev, int 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)
{
	int ret;

	if (!port_num || port_num > ibdev->phys_port_cnt)
		return IB_MAD_RESULT_FAILURE;

	/* accept only pma request */
	if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
		return IB_MAD_RESULT_SUCCESS;

	ehca_dbg(ibdev, "port_num=%x src_qp=%x", port_num, in_wc->src_qp);
	ret = ehca_process_perf(ibdev, port_num, in_mad, out_mad);

	return ret;
}