2 * Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2014 Intel Corporation. All rights reserved.
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
40 #include <rdma/ib_smi.h>
44 static enum smi_action __smi_handle_dr_smp_send(u8 node_type, int port_num,
45 u8 *hop_ptr, u8 hop_cnt,
46 const u8 *initial_path,
47 const u8 *return_path,
49 bool dr_dlid_is_permissive,
50 bool dr_slid_is_permissive)
52 /* See section 14.2.2.2, Vol 1 IB spec */
53 /* C14-6 -- valid hop_cnt values are from 0 to 63 */
54 if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
55 return IB_SMI_DISCARD;
59 if (hop_cnt && *hop_ptr == 0) {
61 return (initial_path[*hop_ptr] ==
62 port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
66 if (*hop_ptr && *hop_ptr < hop_cnt) {
67 if (node_type != RDMA_NODE_IB_SWITCH)
68 return IB_SMI_DISCARD;
70 /* return_path set when received */
72 return (initial_path[*hop_ptr] ==
73 port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
76 /* C14-9:3 -- We're at the end of the DR segment of path */
77 if (*hop_ptr == hop_cnt) {
78 /* return_path set when received */
80 return (node_type == RDMA_NODE_IB_SWITCH ||
81 dr_dlid_is_permissive ?
82 IB_SMI_HANDLE : IB_SMI_DISCARD);
85 /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
86 /* C14-9:5 -- Fail unreasonable hop pointer */
87 return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
91 if (hop_cnt && *hop_ptr == hop_cnt + 1) {
93 return (return_path[*hop_ptr] ==
94 port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
98 if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
99 if (node_type != RDMA_NODE_IB_SWITCH)
100 return IB_SMI_DISCARD;
103 return (return_path[*hop_ptr] ==
104 port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
107 /* C14-13:3 -- at the end of the DR segment of path */
110 /* C14-13:3 -- SMPs destined for SM shouldn't be here */
111 return (node_type == RDMA_NODE_IB_SWITCH ||
112 dr_slid_is_permissive ?
113 IB_SMI_HANDLE : IB_SMI_DISCARD);
116 /* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */
118 return IB_SMI_HANDLE;
120 /* C14-13:5 -- Check for unreasonable hop pointer */
121 return IB_SMI_DISCARD;
126 * Fixup a directed route SMP for sending
127 * Return IB_SMI_DISCARD if the SMP should be discarded
129 enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
130 u8 node_type, int port_num)
132 return __smi_handle_dr_smp_send(node_type, port_num,
133 &smp->hop_ptr, smp->hop_cnt,
136 ib_get_smp_direction(smp),
137 smp->dr_dlid == IB_LID_PERMISSIVE,
138 smp->dr_slid == IB_LID_PERMISSIVE);
141 enum smi_action opa_smi_handle_dr_smp_send(struct opa_smp *smp,
142 u8 node_type, int port_num)
144 return __smi_handle_dr_smp_send(node_type, port_num,
145 &smp->hop_ptr, smp->hop_cnt,
146 smp->route.dr.initial_path,
147 smp->route.dr.return_path,
148 opa_get_smp_direction(smp),
149 smp->route.dr.dr_dlid ==
151 smp->route.dr.dr_slid ==
155 static enum smi_action __smi_handle_dr_smp_recv(u8 node_type, int port_num,
157 u8 *hop_ptr, u8 hop_cnt,
158 const u8 *initial_path,
161 bool dr_dlid_is_permissive,
162 bool dr_slid_is_permissive)
164 /* See section 14.2.2.2, Vol 1 IB spec */
165 /* C14-6 -- valid hop_cnt values are from 0 to 63 */
166 if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
167 return IB_SMI_DISCARD;
170 /* C14-9:1 -- sender should have incremented hop_ptr */
171 if (hop_cnt && *hop_ptr == 0)
172 return IB_SMI_DISCARD;
174 /* C14-9:2 -- intermediate hop */
175 if (*hop_ptr && *hop_ptr < hop_cnt) {
176 if (node_type != RDMA_NODE_IB_SWITCH)
177 return IB_SMI_DISCARD;
179 return_path[*hop_ptr] = port_num;
180 /* hop_ptr updated when sending */
181 return (initial_path[*hop_ptr+1] <= phys_port_cnt ?
182 IB_SMI_HANDLE : IB_SMI_DISCARD);
185 /* C14-9:3 -- We're at the end of the DR segment of path */
186 if (*hop_ptr == hop_cnt) {
188 return_path[*hop_ptr] = port_num;
189 /* hop_ptr updated when sending */
191 return (node_type == RDMA_NODE_IB_SWITCH ||
192 dr_dlid_is_permissive ?
193 IB_SMI_HANDLE : IB_SMI_DISCARD);
196 /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
197 /* C14-9:5 -- fail unreasonable hop pointer */
198 return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
203 if (hop_cnt && *hop_ptr == hop_cnt + 1) {
205 return (return_path[*hop_ptr] ==
206 port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
210 if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
211 if (node_type != RDMA_NODE_IB_SWITCH)
212 return IB_SMI_DISCARD;
214 /* hop_ptr updated when sending */
215 return (return_path[*hop_ptr-1] <= phys_port_cnt ?
216 IB_SMI_HANDLE : IB_SMI_DISCARD);
219 /* C14-13:3 -- We're at the end of the DR segment of path */
221 if (dr_slid_is_permissive) {
222 /* giving SMP to SM - update hop_ptr */
224 return IB_SMI_HANDLE;
226 /* hop_ptr updated when sending */
227 return (node_type == RDMA_NODE_IB_SWITCH ?
228 IB_SMI_HANDLE : IB_SMI_DISCARD);
231 /* C14-13:4 -- hop_ptr = 0 -> give to SM */
232 /* C14-13:5 -- Check for unreasonable hop pointer */
233 return (*hop_ptr == 0 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
238 * Adjust information for a received SMP
239 * Return IB_SMI_DISCARD if the SMP should be dropped
241 enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, u8 node_type,
242 int port_num, int phys_port_cnt)
244 return __smi_handle_dr_smp_recv(node_type, port_num, phys_port_cnt,
245 &smp->hop_ptr, smp->hop_cnt,
248 ib_get_smp_direction(smp),
249 smp->dr_dlid == IB_LID_PERMISSIVE,
250 smp->dr_slid == IB_LID_PERMISSIVE);
254 * Adjust information for a received SMP
255 * Return IB_SMI_DISCARD if the SMP should be dropped
257 enum smi_action opa_smi_handle_dr_smp_recv(struct opa_smp *smp, u8 node_type,
258 int port_num, int phys_port_cnt)
260 return __smi_handle_dr_smp_recv(node_type, port_num, phys_port_cnt,
261 &smp->hop_ptr, smp->hop_cnt,
262 smp->route.dr.initial_path,
263 smp->route.dr.return_path,
264 opa_get_smp_direction(smp),
265 smp->route.dr.dr_dlid ==
267 smp->route.dr.dr_slid ==
271 static enum smi_forward_action __smi_check_forward_dr_smp(u8 hop_ptr, u8 hop_cnt,
273 bool dr_dlid_is_permissive,
274 bool dr_slid_is_permissive)
277 /* C14-9:2 -- intermediate hop */
278 if (hop_ptr && hop_ptr < hop_cnt)
279 return IB_SMI_FORWARD;
281 /* C14-9:3 -- at the end of the DR segment of path */
282 if (hop_ptr == hop_cnt)
283 return (dr_dlid_is_permissive ?
284 IB_SMI_SEND : IB_SMI_LOCAL);
286 /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
287 if (hop_ptr == hop_cnt + 1)
290 /* C14-13:2 -- intermediate hop */
291 if (2 <= hop_ptr && hop_ptr <= hop_cnt)
292 return IB_SMI_FORWARD;
294 /* C14-13:3 -- at the end of the DR segment of path */
296 return (!dr_slid_is_permissive ?
297 IB_SMI_SEND : IB_SMI_LOCAL);
303 enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp)
305 return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
306 ib_get_smp_direction(smp),
307 smp->dr_dlid == IB_LID_PERMISSIVE,
308 smp->dr_slid == IB_LID_PERMISSIVE);
311 enum smi_forward_action opa_smi_check_forward_dr_smp(struct opa_smp *smp)
313 return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
314 opa_get_smp_direction(smp),
315 smp->route.dr.dr_dlid ==
317 smp->route.dr.dr_slid ==
322 * Return the forwarding port number from initial_path for outgoing SMP and
323 * from return_path for returning SMP
325 int smi_get_fwd_port(struct ib_smp *smp)
327 return (!ib_get_smp_direction(smp) ? smp->initial_path[smp->hop_ptr+1] :
328 smp->return_path[smp->hop_ptr-1]);
332 * Return the forwarding port number from initial_path for outgoing SMP and
333 * from return_path for returning SMP
335 int opa_smi_get_fwd_port(struct opa_smp *smp)
337 return !opa_get_smp_direction(smp) ? smp->route.dr.initial_path[smp->hop_ptr+1] :
338 smp->route.dr.return_path[smp->hop_ptr-1];