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]);