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
35 #include <linux/string.h>
36 #include <linux/slab.h>
38 #include <rdma/ib_verbs.h>
39 #include <rdma/ib_mad.h>
40 #include <rdma/ib_smi.h>
42 #include "mthca_dev.h"
43 #include "mthca_cmd.h"
46 MTHCA_VENDOR_CLASS1 = 0x9,
47 MTHCA_VENDOR_CLASS2 = 0xa
50 static int mthca_update_rate(struct mthca_dev *dev, u8 port_num)
52 struct ib_port_attr *tprops = NULL;
55 tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
59 ret = ib_query_port(&dev->ib_dev, port_num, tprops);
61 printk(KERN_WARNING "ib_query_port failed (%d) for %s port %d\n",
62 ret, dev->ib_dev.name, port_num);
66 dev->rate[port_num - 1] = tprops->active_speed *
67 ib_width_enum_to_int(tprops->active_width);
74 static void update_sm_ah(struct mthca_dev *dev,
75 u8 port_num, u16 lid, u8 sl)
78 struct ib_ah_attr ah_attr;
81 if (!dev->send_agent[port_num - 1][0])
84 memset(&ah_attr, 0, sizeof ah_attr);
87 ah_attr.port_num = port_num;
89 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
94 spin_lock_irqsave(&dev->sm_lock, flags);
95 if (dev->sm_ah[port_num - 1])
96 ib_destroy_ah(dev->sm_ah[port_num - 1]);
97 dev->sm_ah[port_num - 1] = new_ah;
98 spin_unlock_irqrestore(&dev->sm_lock, flags);
102 * Snoop SM MADs for port info and P_Key table sets, so we can
103 * synthesize LID change and P_Key change events.
105 static void smp_snoop(struct ib_device *ibdev,
109 struct ib_event event;
111 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
112 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
113 mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
114 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
115 struct ib_port_info *pinfo =
116 (struct ib_port_info *) ((struct ib_smp *) mad)->data;
118 mthca_update_rate(to_mdev(ibdev), port_num);
119 update_sm_ah(to_mdev(ibdev), port_num,
120 be16_to_cpu(pinfo->sm_lid),
121 pinfo->neighbormtu_mastersmsl & 0xf);
123 event.device = ibdev;
124 event.element.port_num = port_num;
126 if (pinfo->clientrereg_resv_subnetto & 0x80)
127 event.event = IB_EVENT_CLIENT_REREGISTER;
129 event.event = IB_EVENT_LID_CHANGE;
131 ib_dispatch_event(&event);
134 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
135 event.device = ibdev;
136 event.event = IB_EVENT_PKEY_CHANGE;
137 event.element.port_num = port_num;
138 ib_dispatch_event(&event);
143 static void node_desc_override(struct ib_device *dev,
146 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
147 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
148 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
149 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
150 mutex_lock(&to_mdev(dev)->cap_mask_mutex);
151 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
152 mutex_unlock(&to_mdev(dev)->cap_mask_mutex);
156 static void forward_trap(struct mthca_dev *dev,
160 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
161 struct ib_mad_send_buf *send_buf;
162 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
167 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
168 IB_MGMT_MAD_DATA, GFP_ATOMIC);
170 * We rely here on the fact that MLX QPs don't use the
171 * address handle after the send is posted (this is
172 * wrong following the IB spec strictly, but we know
173 * it's OK for our devices).
175 spin_lock_irqsave(&dev->sm_lock, flags);
176 memcpy(send_buf->mad, mad, sizeof *mad);
177 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
178 ret = ib_post_send_mad(send_buf, NULL);
181 spin_unlock_irqrestore(&dev->sm_lock, flags);
184 ib_free_send_mad(send_buf);
188 int mthca_process_mad(struct ib_device *ibdev,
192 struct ib_grh *in_grh,
193 struct ib_mad *in_mad,
194 struct ib_mad *out_mad)
198 u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
200 /* Forward locally generated traps to the SM */
201 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
203 forward_trap(to_mdev(ibdev), port_num, in_mad);
204 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
208 * Only handle SM gets, sets and trap represses for SM class
210 * Only handle PMA and Mellanox vendor-specific class gets and
211 * sets for other classes.
213 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
214 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
215 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
216 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
217 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
218 return IB_MAD_RESULT_SUCCESS;
221 * Don't process SMInfo queries or vendor-specific
222 * MADs -- the SMA can't handle them.
224 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
225 ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
226 IB_SMP_ATTR_VENDOR_MASK))
227 return IB_MAD_RESULT_SUCCESS;
228 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
229 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS1 ||
230 in_mad->mad_hdr.mgmt_class == MTHCA_VENDOR_CLASS2) {
231 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
232 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
233 return IB_MAD_RESULT_SUCCESS;
235 return IB_MAD_RESULT_SUCCESS;
237 err = mthca_MAD_IFC(to_mdev(ibdev),
238 mad_flags & IB_MAD_IGNORE_MKEY,
239 mad_flags & IB_MAD_IGNORE_BKEY,
240 port_num, in_wc, in_grh, in_mad, out_mad,
243 mthca_err(to_mdev(ibdev), "MAD_IFC failed\n");
244 return IB_MAD_RESULT_FAILURE;
246 if (status == MTHCA_CMD_STAT_BAD_PKT)
247 return IB_MAD_RESULT_SUCCESS;
249 mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n",
251 return IB_MAD_RESULT_FAILURE;
254 if (!out_mad->mad_hdr.status) {
255 smp_snoop(ibdev, port_num, in_mad);
256 node_desc_override(ibdev, out_mad);
259 /* set return bit in status of directed route responses */
260 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
261 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
263 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
264 /* no response for trap repress */
265 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
267 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
270 static void send_handler(struct ib_mad_agent *agent,
271 struct ib_mad_send_wc *mad_send_wc)
273 ib_free_send_mad(mad_send_wc->send_buf);
276 int mthca_create_agents(struct mthca_dev *dev)
278 struct ib_mad_agent *agent;
282 spin_lock_init(&dev->sm_lock);
284 for (p = 0; p < dev->limits.num_ports; ++p)
285 for (q = 0; q <= 1; ++q) {
286 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
287 q ? IB_QPT_GSI : IB_QPT_SMI,
288 NULL, 0, send_handler,
291 ret = PTR_ERR(agent);
294 dev->send_agent[p][q] = agent;
298 for (p = 1; p <= dev->limits.num_ports; ++p) {
299 ret = mthca_update_rate(dev, p);
301 mthca_err(dev, "Failed to obtain port %d rate."
310 for (p = 0; p < dev->limits.num_ports; ++p)
311 for (q = 0; q <= 1; ++q)
312 if (dev->send_agent[p][q])
313 ib_unregister_mad_agent(dev->send_agent[p][q]);
318 void mthca_free_agents(struct mthca_dev *dev)
320 struct ib_mad_agent *agent;
323 for (p = 0; p < dev->limits.num_ports; ++p) {
324 for (q = 0; q <= 1; ++q) {
325 agent = dev->send_agent[p][q];
326 dev->send_agent[p][q] = NULL;
327 ib_unregister_mad_agent(agent);
331 ib_destroy_ah(dev->sm_ah[p]);