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 node_desc_override(struct ib_device *dev,
115 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
116 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
117 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
118 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
119 mutex_lock(&to_mdev(dev)->cap_mask_mutex);
120 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
121 mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
125 static void forward_trap(struct mthca_dev *dev,
129 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
130 struct ib_mad_send_buf *send_buf;
131 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
136 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
137 IB_MGMT_MAD_DATA, GFP_ATOMIC);
139 * We rely here on the fact that MLX QPs don't use the
140 * address handle after the send is posted (this is
141 * wrong following the IB spec strictly, but we know
142 * it's OK for our devices).
144 spin_lock_irqsave(&dev->sm_lock, flags);
145 memcpy(send_buf->mad, mad, sizeof *mad);
146 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
147 ret = ib_post_send_mad(send_buf, NULL);
150 spin_unlock_irqrestore(&dev->sm_lock, flags);
153 ib_free_send_mad(send_buf);
157 int mthca_process_mad(struct ib_device *ibdev,
161 struct ib_grh *in_grh,
162 struct ib_mad *in_mad,
163 struct ib_mad *out_mad)
167 u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
169 /* Forward locally generated traps to the SM */
170 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
172 forward_trap(to_mdev(ibdev), port_num, in_mad);
173 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
177 * Only handle SM gets, sets and trap represses for SM class
179 * Only handle PMA and Mellanox vendor-specific class gets and
180 * sets for other classes.
182 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
183 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
184 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
185 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
186 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
187 return IB_MAD_RESULT_SUCCESS;
190 * Don't process SMInfo queries or vendor-specific
191 * MADs -- the SMA can't handle them.
193 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
194 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
195 IB_SMP_ATTR_VENDOR_MASK))
196 return IB_MAD_RESULT_SUCCESS;
197 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
198 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
199 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
200 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
201 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
202 return IB_MAD_RESULT_SUCCESS;
204 return IB_MAD_RESULT_SUCCESS;
206 err = mthca_MAD_IFC(to_mdev(ibdev),
207 mad_flags & IB_MAD_IGNORE_MKEY,
208 mad_flags & IB_MAD_IGNORE_BKEY,
209 port_num, in_wc, in_grh, in_mad, out_mad,
212 mthca_err(to_mdev(ibdev), "MAD_IFC failed\n");
213 return IB_MAD_RESULT_FAILURE;
215 if (status == MTHCA_CMD_STAT_BAD_PKT)
216 return IB_MAD_RESULT_SUCCESS;
218 mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n",
220 return IB_MAD_RESULT_FAILURE;
223 if (!out_mad->mad_hdr.status) {
224 smp_snoop(ibdev, port_num, in_mad);
225 node_desc_override(ibdev, out_mad);
228 /* set return bit in status of directed route responses */
229 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
230 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
232 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
233 /* no response for trap repress */
234 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
236 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
239 static void send_handler(struct ib_mad_agent *agent,
240 struct ib_mad_send_wc *mad_send_wc)
242 ib_free_send_mad(mad_send_wc->send_buf);
245 int mthca_create_agents(struct mthca_dev *dev)
247 struct ib_mad_agent *agent;
250 spin_lock_init(&dev->sm_lock);
252 for (p = 0; p < dev->limits.num_ports; ++p)
253 for (q = 0; q <= 1; ++q) {
254 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
255 q ? IB_QPT_GSI : IB_QPT_SMI,
256 NULL, 0, send_handler,
260 dev->send_agent[p][q] = agent;
266 for (p = 0; p < dev->limits.num_ports; ++p)
267 for (q = 0; q <= 1; ++q)
268 if (dev->send_agent[p][q])
269 ib_unregister_mad_agent(dev->send_agent[p][q]);
271 return PTR_ERR(agent);
274 void __devexit mthca_free_agents(struct mthca_dev *dev)
276 struct ib_mad_agent *agent;
279 for (p = 0; p < dev->limits.num_ports; ++p) {
280 for (q = 0; q <= 1; ++q) {
281 agent = dev->send_agent[p][q];
282 dev->send_agent[p][q] = NULL;
283 ib_unregister_mad_agent(agent);
287 ib_destroy_ah(dev->sm_ah[p]);