2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * $Id: mthca_mad.c 1349 2004-12-16 21:09:43Z roland $
37 #include <linux/string.h>
38 #include <linux/slab.h>
40 #include <rdma/ib_verbs.h>
41 #include <rdma/ib_mad.h>
42 #include <rdma/ib_smi.h>
44 #include "mthca_dev.h"
45 #include "mthca_cmd.h"
48 MTHCA_VENDOR_CLASS1
= 0x9,
49 MTHCA_VENDOR_CLASS2
= 0xa
52 static void update_sm_ah(struct mthca_dev
*dev
,
53 u8 port_num
, u16 lid
, u8 sl
)
56 struct ib_ah_attr ah_attr
;
59 if (!dev
->send_agent
[port_num
- 1][0])
62 memset(&ah_attr
, 0, sizeof ah_attr
);
65 ah_attr
.port_num
= port_num
;
67 new_ah
= ib_create_ah(dev
->send_agent
[port_num
- 1][0]->qp
->pd
,
72 spin_lock_irqsave(&dev
->sm_lock
, flags
);
73 if (dev
->sm_ah
[port_num
- 1])
74 ib_destroy_ah(dev
->sm_ah
[port_num
- 1]);
75 dev
->sm_ah
[port_num
- 1] = new_ah
;
76 spin_unlock_irqrestore(&dev
->sm_lock
, flags
);
80 * Snoop SM MADs for port info and P_Key table sets, so we can
81 * synthesize LID change and P_Key change events.
83 static void smp_snoop(struct ib_device
*ibdev
,
87 struct ib_event event
;
89 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
||
90 mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) &&
91 mad
->mad_hdr
.method
== IB_MGMT_METHOD_SET
) {
92 if (mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_PORT_INFO
) {
93 update_sm_ah(to_mdev(ibdev
), port_num
,
94 be16_to_cpup((__be16
*) (mad
->data
+ 58)),
95 (*(u8
*) (mad
->data
+ 76)) & 0xf);
98 event
.event
= IB_EVENT_LID_CHANGE
;
99 event
.element
.port_num
= port_num
;
100 ib_dispatch_event(&event
);
103 if (mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_PKEY_TABLE
) {
104 event
.device
= ibdev
;
105 event
.event
= IB_EVENT_PKEY_CHANGE
;
106 event
.element
.port_num
= port_num
;
107 ib_dispatch_event(&event
);
112 static void forward_trap(struct mthca_dev
*dev
,
116 int qpn
= mad
->mad_hdr
.mgmt_class
!= IB_MGMT_CLASS_SUBN_LID_ROUTED
;
117 struct ib_mad_send_buf
*send_buf
;
118 struct ib_mad_agent
*agent
= dev
->send_agent
[port_num
- 1][qpn
];
123 send_buf
= ib_create_send_mad(agent
, qpn
, 0, 0, IB_MGMT_MAD_HDR
,
124 IB_MGMT_MAD_DATA
, GFP_ATOMIC
);
126 * We rely here on the fact that MLX QPs don't use the
127 * address handle after the send is posted (this is
128 * wrong following the IB spec strictly, but we know
129 * it's OK for our devices).
131 spin_lock_irqsave(&dev
->sm_lock
, flags
);
132 memcpy(send_buf
->mad
, mad
, sizeof *mad
);
133 if ((send_buf
->ah
= dev
->sm_ah
[port_num
- 1]))
134 ret
= ib_post_send_mad(send_buf
, NULL
);
137 spin_unlock_irqrestore(&dev
->sm_lock
, flags
);
140 ib_free_send_mad(send_buf
);
144 int mthca_process_mad(struct ib_device
*ibdev
,
148 struct ib_grh
*in_grh
,
149 struct ib_mad
*in_mad
,
150 struct ib_mad
*out_mad
)
154 u16 slid
= in_wc
? in_wc
->slid
: be16_to_cpu(IB_LID_PERMISSIVE
);
156 /* Forward locally generated traps to the SM */
157 if (in_mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP
&&
159 forward_trap(to_mdev(ibdev
), port_num
, in_mad
);
160 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
;
164 * Only handle SM gets, sets and trap represses for SM class
166 * Only handle PMA and Mellanox vendor-specific class gets and
167 * sets for other classes.
169 if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
||
170 in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
171 if (in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_GET
&&
172 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_SET
&&
173 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_TRAP_REPRESS
)
174 return IB_MAD_RESULT_SUCCESS
;
177 * Don't process SMInfo queries or vendor-specific
178 * MADs -- the SMA can't handle them.
180 if (in_mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_SM_INFO
||
181 ((in_mad
->mad_hdr
.attr_id
& IB_SMP_ATTR_VENDOR_MASK
) ==
182 IB_SMP_ATTR_VENDOR_MASK
))
183 return IB_MAD_RESULT_SUCCESS
;
184 } else if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_PERF_MGMT
||
185 in_mad
->mad_hdr
.mgmt_class
== MTHCA_VENDOR_CLASS1
||
186 in_mad
->mad_hdr
.mgmt_class
== MTHCA_VENDOR_CLASS2
) {
187 if (in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_GET
&&
188 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_SET
)
189 return IB_MAD_RESULT_SUCCESS
;
191 return IB_MAD_RESULT_SUCCESS
;
193 err
= mthca_MAD_IFC(to_mdev(ibdev
),
194 mad_flags
& IB_MAD_IGNORE_MKEY
,
195 mad_flags
& IB_MAD_IGNORE_BKEY
,
196 port_num
, in_wc
, in_grh
, in_mad
, out_mad
,
199 mthca_err(to_mdev(ibdev
), "MAD_IFC failed\n");
200 return IB_MAD_RESULT_FAILURE
;
202 if (status
== MTHCA_CMD_STAT_BAD_PKT
)
203 return IB_MAD_RESULT_SUCCESS
;
205 mthca_err(to_mdev(ibdev
), "MAD_IFC returned status %02x\n",
207 return IB_MAD_RESULT_FAILURE
;
210 if (!out_mad
->mad_hdr
.status
)
211 smp_snoop(ibdev
, port_num
, in_mad
);
213 /* set return bit in status of directed route responses */
214 if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
215 out_mad
->mad_hdr
.status
|= cpu_to_be16(1 << 15);
217 if (in_mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP_REPRESS
)
218 /* no response for trap repress */
219 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
;
221 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
;
224 static void send_handler(struct ib_mad_agent
*agent
,
225 struct ib_mad_send_wc
*mad_send_wc
)
227 ib_free_send_mad(mad_send_wc
->send_buf
);
230 int mthca_create_agents(struct mthca_dev
*dev
)
232 struct ib_mad_agent
*agent
;
235 spin_lock_init(&dev
->sm_lock
);
237 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
)
238 for (q
= 0; q
<= 1; ++q
) {
239 agent
= ib_register_mad_agent(&dev
->ib_dev
, p
+ 1,
240 q
? IB_QPT_GSI
: IB_QPT_SMI
,
241 NULL
, 0, send_handler
,
245 dev
->send_agent
[p
][q
] = agent
;
251 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
)
252 for (q
= 0; q
<= 1; ++q
)
253 if (dev
->send_agent
[p
][q
])
254 ib_unregister_mad_agent(dev
->send_agent
[p
][q
]);
256 return PTR_ERR(agent
);
259 void mthca_free_agents(struct mthca_dev
*dev
)
261 struct ib_mad_agent
*agent
;
264 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
) {
265 for (q
= 0; q
<= 1; ++q
) {
266 agent
= dev
->send_agent
[p
][q
];
267 dev
->send_agent
[p
][q
] = NULL
;
268 ib_unregister_mad_agent(agent
);
272 ib_destroy_ah(dev
->sm_ah
[p
]);