2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <rdma/ib_mad.h>
34 #include <rdma/ib_smi.h>
36 #include <linux/mlx4/cmd.h>
37 #include <linux/gfp.h>
38 #include <rdma/ib_pma.h>
43 MLX4_IB_VENDOR_CLASS1 = 0x9,
44 MLX4_IB_VENDOR_CLASS2 = 0xa
47 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
48 int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
49 void *in_mad, void *response_mad)
51 struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
54 u32 in_modifier = port;
57 inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
58 if (IS_ERR(inmailbox))
59 return PTR_ERR(inmailbox);
60 inbox = inmailbox->buf;
62 outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
63 if (IS_ERR(outmailbox)) {
64 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
65 return PTR_ERR(outmailbox);
68 memcpy(inbox, in_mad, 256);
71 * Key check traps can't be generated unless we have in_wc to
72 * tell us where to send the trap.
74 if (ignore_mkey || !in_wc)
76 if (ignore_bkey || !in_wc)
92 memset(inbox + 256, 0, 256);
93 ext_info = inbox + 256;
95 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
96 ext_info->rqpn = cpu_to_be32(in_wc->src_qp);
97 ext_info->sl = in_wc->sl << 4;
98 ext_info->g_path = in_wc->dlid_path_bits |
99 (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
100 ext_info->pkey = cpu_to_be16(in_wc->pkey_index);
103 memcpy(ext_info->grh, in_grh, 40);
107 in_modifier |= in_wc->slid << 16;
110 err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma,
111 in_modifier, op_modifier,
112 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
116 memcpy(response_mad, outmailbox->buf, 256);
118 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
119 mlx4_free_cmd_mailbox(dev->dev, outmailbox);
124 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
126 struct ib_ah *new_ah;
127 struct ib_ah_attr ah_attr;
129 if (!dev->send_agent[port_num - 1][0])
132 memset(&ah_attr, 0, sizeof ah_attr);
135 ah_attr.port_num = port_num;
137 new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
142 spin_lock(&dev->sm_lock);
143 if (dev->sm_ah[port_num - 1])
144 ib_destroy_ah(dev->sm_ah[port_num - 1]);
145 dev->sm_ah[port_num - 1] = new_ah;
146 spin_unlock(&dev->sm_lock);
150 * Snoop SM MADs for port info and P_Key table sets, so we can
151 * synthesize LID change and P_Key change events.
153 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad,
156 struct ib_event event;
158 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
159 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
160 mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
161 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
162 struct ib_port_info *pinfo =
163 (struct ib_port_info *) ((struct ib_smp *) mad)->data;
164 u16 lid = be16_to_cpu(pinfo->lid);
166 update_sm_ah(to_mdev(ibdev), port_num,
167 be16_to_cpu(pinfo->sm_lid),
168 pinfo->neighbormtu_mastersmsl & 0xf);
170 event.device = ibdev;
171 event.element.port_num = port_num;
173 if (pinfo->clientrereg_resv_subnetto & 0x80) {
174 event.event = IB_EVENT_CLIENT_REREGISTER;
175 ib_dispatch_event(&event);
178 if (prev_lid != lid) {
179 event.event = IB_EVENT_LID_CHANGE;
180 ib_dispatch_event(&event);
184 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
185 event.device = ibdev;
186 event.event = IB_EVENT_PKEY_CHANGE;
187 event.element.port_num = port_num;
188 ib_dispatch_event(&event);
193 static void node_desc_override(struct ib_device *dev,
196 if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
197 mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
198 mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
199 mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
200 spin_lock(&to_mdev(dev)->sm_lock);
201 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
202 spin_unlock(&to_mdev(dev)->sm_lock);
206 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad)
208 int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
209 struct ib_mad_send_buf *send_buf;
210 struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
214 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
215 IB_MGMT_MAD_DATA, GFP_ATOMIC);
216 if (IS_ERR(send_buf))
219 * We rely here on the fact that MLX QPs don't use the
220 * address handle after the send is posted (this is
221 * wrong following the IB spec strictly, but we know
222 * it's OK for our devices).
224 spin_lock(&dev->sm_lock);
225 memcpy(send_buf->mad, mad, sizeof *mad);
226 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
227 ret = ib_post_send_mad(send_buf, NULL);
230 spin_unlock(&dev->sm_lock);
233 ib_free_send_mad(send_buf);
237 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
238 struct ib_wc *in_wc, struct ib_grh *in_grh,
239 struct ib_mad *in_mad, struct ib_mad *out_mad)
241 u16 slid, prev_lid = 0;
243 struct ib_port_attr pattr;
245 if (in_wc && in_wc->qp->qp_num) {
246 pr_debug("received MAD: slid:%d sqpn:%d "
247 "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
248 in_wc->slid, in_wc->src_qp,
249 in_wc->dlid_path_bits,
252 in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
253 be16_to_cpu(in_mad->mad_hdr.attr_id));
254 if (in_wc->wc_flags & IB_WC_GRH) {
255 pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
256 be64_to_cpu(in_grh->sgid.global.subnet_prefix),
257 be64_to_cpu(in_grh->sgid.global.interface_id));
258 pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
259 be64_to_cpu(in_grh->dgid.global.subnet_prefix),
260 be64_to_cpu(in_grh->dgid.global.interface_id));
264 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
266 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
267 forward_trap(to_mdev(ibdev), port_num, in_mad);
268 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
271 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
272 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
273 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
274 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
275 in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
276 return IB_MAD_RESULT_SUCCESS;
279 * Don't process SMInfo queries -- the SMA can't handle them.
281 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
282 return IB_MAD_RESULT_SUCCESS;
283 } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
284 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 ||
285 in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 ||
286 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
287 if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
288 in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
289 return IB_MAD_RESULT_SUCCESS;
291 return IB_MAD_RESULT_SUCCESS;
293 if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
294 in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
295 in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
296 in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
297 !ib_query_port(ibdev, port_num, &pattr))
298 prev_lid = pattr.lid;
300 err = mlx4_MAD_IFC(to_mdev(ibdev),
301 mad_flags & IB_MAD_IGNORE_MKEY,
302 mad_flags & IB_MAD_IGNORE_BKEY,
303 port_num, in_wc, in_grh, in_mad, out_mad);
305 return IB_MAD_RESULT_FAILURE;
307 if (!out_mad->mad_hdr.status) {
308 smp_snoop(ibdev, port_num, in_mad, prev_lid);
309 node_desc_override(ibdev, out_mad);
312 /* set return bit in status of directed route responses */
313 if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
314 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
316 if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
317 /* no response for trap repress */
318 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
320 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
323 static void edit_counter(struct mlx4_counter *cnt,
324 struct ib_pma_portcounters *pma_cnt)
326 pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2));
327 pma_cnt->port_rcv_data = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2));
328 pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames));
329 pma_cnt->port_rcv_packets = cpu_to_be32(be64_to_cpu(cnt->rx_frames));
332 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
333 struct ib_wc *in_wc, struct ib_grh *in_grh,
334 struct ib_mad *in_mad, struct ib_mad *out_mad)
336 struct mlx4_cmd_mailbox *mailbox;
337 struct mlx4_ib_dev *dev = to_mdev(ibdev);
339 u32 inmod = dev->counters[port_num - 1] & 0xffff;
342 if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
345 mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
347 return IB_MAD_RESULT_FAILURE;
349 err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0,
350 MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C,
353 err = IB_MAD_RESULT_FAILURE;
355 memset(out_mad->data, 0, sizeof out_mad->data);
356 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode;
357 switch (mode & 0xf) {
359 edit_counter(mailbox->buf,
360 (void *)(out_mad->data + 40));
361 err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
364 err = IB_MAD_RESULT_FAILURE;
368 mlx4_free_cmd_mailbox(dev->dev, mailbox);
373 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
374 struct ib_wc *in_wc, struct ib_grh *in_grh,
375 struct ib_mad *in_mad, struct ib_mad *out_mad)
377 switch (rdma_port_get_link_layer(ibdev, port_num)) {
378 case IB_LINK_LAYER_INFINIBAND:
379 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
380 in_grh, in_mad, out_mad);
381 case IB_LINK_LAYER_ETHERNET:
382 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
383 in_grh, in_mad, out_mad);
389 static void send_handler(struct ib_mad_agent *agent,
390 struct ib_mad_send_wc *mad_send_wc)
392 ib_free_send_mad(mad_send_wc->send_buf);
395 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
397 struct ib_mad_agent *agent;
400 enum rdma_link_layer ll;
402 for (p = 0; p < dev->num_ports; ++p) {
403 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
404 for (q = 0; q <= 1; ++q) {
405 if (ll == IB_LINK_LAYER_INFINIBAND) {
406 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
407 q ? IB_QPT_GSI : IB_QPT_SMI,
408 NULL, 0, send_handler,
411 ret = PTR_ERR(agent);
414 dev->send_agent[p][q] = agent;
416 dev->send_agent[p][q] = NULL;
423 for (p = 0; p < dev->num_ports; ++p)
424 for (q = 0; q <= 1; ++q)
425 if (dev->send_agent[p][q])
426 ib_unregister_mad_agent(dev->send_agent[p][q]);
431 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
433 struct ib_mad_agent *agent;
436 for (p = 0; p < dev->num_ports; ++p) {
437 for (q = 0; q <= 1; ++q) {
438 agent = dev->send_agent[p][q];
440 dev->send_agent[p][q] = NULL;
441 ib_unregister_mad_agent(agent);
446 ib_destroy_ah(dev->sm_ah[p]);