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 int mthca_update_rate(struct mthca_dev
*dev
, u8 port_num
)
54 struct ib_port_attr
*tprops
= NULL
;
57 tprops
= kmalloc(sizeof *tprops
, GFP_KERNEL
);
61 ret
= ib_query_port(&dev
->ib_dev
, port_num
, tprops
);
63 printk(KERN_WARNING
"ib_query_port failed (%d) for %s port %d\n",
64 ret
, dev
->ib_dev
.name
, port_num
);
68 dev
->rate
[port_num
- 1] = tprops
->active_speed
*
69 ib_width_enum_to_int(tprops
->active_width
);
76 static void update_sm_ah(struct mthca_dev
*dev
,
77 u8 port_num
, u16 lid
, u8 sl
)
80 struct ib_ah_attr ah_attr
;
83 if (!dev
->send_agent
[port_num
- 1][0])
86 memset(&ah_attr
, 0, sizeof ah_attr
);
89 ah_attr
.port_num
= port_num
;
91 new_ah
= ib_create_ah(dev
->send_agent
[port_num
- 1][0]->qp
->pd
,
96 spin_lock_irqsave(&dev
->sm_lock
, flags
);
97 if (dev
->sm_ah
[port_num
- 1])
98 ib_destroy_ah(dev
->sm_ah
[port_num
- 1]);
99 dev
->sm_ah
[port_num
- 1] = new_ah
;
100 spin_unlock_irqrestore(&dev
->sm_lock
, flags
);
104 * Snoop SM MADs for port info and P_Key table sets, so we can
105 * synthesize LID change and P_Key change events.
107 static void smp_snoop(struct ib_device
*ibdev
,
111 struct ib_event event
;
113 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
||
114 mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) &&
115 mad
->mad_hdr
.method
== IB_MGMT_METHOD_SET
) {
116 if (mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_PORT_INFO
) {
117 mthca_update_rate(to_mdev(ibdev
), port_num
);
118 update_sm_ah(to_mdev(ibdev
), port_num
,
119 be16_to_cpup((__be16
*) (mad
->data
+ 58)),
120 (*(u8
*) (mad
->data
+ 76)) & 0xf);
122 event
.device
= ibdev
;
123 event
.event
= IB_EVENT_LID_CHANGE
;
124 event
.element
.port_num
= port_num
;
125 ib_dispatch_event(&event
);
128 if (mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_PKEY_TABLE
) {
129 event
.device
= ibdev
;
130 event
.event
= IB_EVENT_PKEY_CHANGE
;
131 event
.element
.port_num
= port_num
;
132 ib_dispatch_event(&event
);
137 static void node_desc_override(struct ib_device
*dev
,
140 if ((mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
||
141 mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) &&
142 mad
->mad_hdr
.method
== IB_MGMT_METHOD_GET_RESP
&&
143 mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_NODE_DESC
) {
144 mutex_lock(&to_mdev(dev
)->cap_mask_mutex
);
145 memcpy(((struct ib_smp
*) mad
)->data
, dev
->node_desc
, 64);
146 mutex_unlock(&to_mdev(dev
)->cap_mask_mutex
);
150 static void forward_trap(struct mthca_dev
*dev
,
154 int qpn
= mad
->mad_hdr
.mgmt_class
!= IB_MGMT_CLASS_SUBN_LID_ROUTED
;
155 struct ib_mad_send_buf
*send_buf
;
156 struct ib_mad_agent
*agent
= dev
->send_agent
[port_num
- 1][qpn
];
161 send_buf
= ib_create_send_mad(agent
, qpn
, 0, 0, IB_MGMT_MAD_HDR
,
162 IB_MGMT_MAD_DATA
, GFP_ATOMIC
);
164 * We rely here on the fact that MLX QPs don't use the
165 * address handle after the send is posted (this is
166 * wrong following the IB spec strictly, but we know
167 * it's OK for our devices).
169 spin_lock_irqsave(&dev
->sm_lock
, flags
);
170 memcpy(send_buf
->mad
, mad
, sizeof *mad
);
171 if ((send_buf
->ah
= dev
->sm_ah
[port_num
- 1]))
172 ret
= ib_post_send_mad(send_buf
, NULL
);
175 spin_unlock_irqrestore(&dev
->sm_lock
, flags
);
178 ib_free_send_mad(send_buf
);
182 int mthca_process_mad(struct ib_device
*ibdev
,
186 struct ib_grh
*in_grh
,
187 struct ib_mad
*in_mad
,
188 struct ib_mad
*out_mad
)
192 u16 slid
= in_wc
? in_wc
->slid
: be16_to_cpu(IB_LID_PERMISSIVE
);
194 /* Forward locally generated traps to the SM */
195 if (in_mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP
&&
197 forward_trap(to_mdev(ibdev
), port_num
, in_mad
);
198 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
;
202 * Only handle SM gets, sets and trap represses for SM class
204 * Only handle PMA and Mellanox vendor-specific class gets and
205 * sets for other classes.
207 if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_LID_ROUTED
||
208 in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
) {
209 if (in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_GET
&&
210 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_SET
&&
211 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_TRAP_REPRESS
)
212 return IB_MAD_RESULT_SUCCESS
;
215 * Don't process SMInfo queries or vendor-specific
216 * MADs -- the SMA can't handle them.
218 if (in_mad
->mad_hdr
.attr_id
== IB_SMP_ATTR_SM_INFO
||
219 ((in_mad
->mad_hdr
.attr_id
& IB_SMP_ATTR_VENDOR_MASK
) ==
220 IB_SMP_ATTR_VENDOR_MASK
))
221 return IB_MAD_RESULT_SUCCESS
;
222 } else if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_PERF_MGMT
||
223 in_mad
->mad_hdr
.mgmt_class
== MTHCA_VENDOR_CLASS1
||
224 in_mad
->mad_hdr
.mgmt_class
== MTHCA_VENDOR_CLASS2
) {
225 if (in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_GET
&&
226 in_mad
->mad_hdr
.method
!= IB_MGMT_METHOD_SET
)
227 return IB_MAD_RESULT_SUCCESS
;
229 return IB_MAD_RESULT_SUCCESS
;
231 err
= mthca_MAD_IFC(to_mdev(ibdev
),
232 mad_flags
& IB_MAD_IGNORE_MKEY
,
233 mad_flags
& IB_MAD_IGNORE_BKEY
,
234 port_num
, in_wc
, in_grh
, in_mad
, out_mad
,
237 mthca_err(to_mdev(ibdev
), "MAD_IFC failed\n");
238 return IB_MAD_RESULT_FAILURE
;
240 if (status
== MTHCA_CMD_STAT_BAD_PKT
)
241 return IB_MAD_RESULT_SUCCESS
;
243 mthca_err(to_mdev(ibdev
), "MAD_IFC returned status %02x\n",
245 return IB_MAD_RESULT_FAILURE
;
248 if (!out_mad
->mad_hdr
.status
) {
249 smp_snoop(ibdev
, port_num
, in_mad
);
250 node_desc_override(ibdev
, out_mad
);
253 /* set return bit in status of directed route responses */
254 if (in_mad
->mad_hdr
.mgmt_class
== IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
)
255 out_mad
->mad_hdr
.status
|= cpu_to_be16(1 << 15);
257 if (in_mad
->mad_hdr
.method
== IB_MGMT_METHOD_TRAP_REPRESS
)
258 /* no response for trap repress */
259 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_CONSUMED
;
261 return IB_MAD_RESULT_SUCCESS
| IB_MAD_RESULT_REPLY
;
264 static void send_handler(struct ib_mad_agent
*agent
,
265 struct ib_mad_send_wc
*mad_send_wc
)
267 ib_free_send_mad(mad_send_wc
->send_buf
);
270 int mthca_create_agents(struct mthca_dev
*dev
)
272 struct ib_mad_agent
*agent
;
276 spin_lock_init(&dev
->sm_lock
);
278 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
)
279 for (q
= 0; q
<= 1; ++q
) {
280 agent
= ib_register_mad_agent(&dev
->ib_dev
, p
+ 1,
281 q
? IB_QPT_GSI
: IB_QPT_SMI
,
282 NULL
, 0, send_handler
,
285 ret
= PTR_ERR(agent
);
288 dev
->send_agent
[p
][q
] = agent
;
292 for (p
= 1; p
<= dev
->limits
.num_ports
; ++p
) {
293 ret
= mthca_update_rate(dev
, p
);
295 mthca_err(dev
, "Failed to obtain port %d rate."
304 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
)
305 for (q
= 0; q
<= 1; ++q
)
306 if (dev
->send_agent
[p
][q
])
307 ib_unregister_mad_agent(dev
->send_agent
[p
][q
]);
312 void __devexit
mthca_free_agents(struct mthca_dev
*dev
)
314 struct ib_mad_agent
*agent
;
317 for (p
= 0; p
< dev
->limits
.num_ports
; ++p
) {
318 for (q
= 0; q
<= 1; ++q
) {
319 agent
= dev
->send_agent
[p
][q
];
320 dev
->send_agent
[p
][q
] = NULL
;
321 ib_unregister_mad_agent(agent
);
325 ib_destroy_ah(dev
->sm_ah
[p
]);