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86f0e67a21
IB and OPA SMPs share the same processing algorithm but have different header formats and permissive LID detection. Add a helper function which is generic to processing DR SMP Recv messages which can be used by both IB and OPA SMP code. Use this function in the current IB function smi_handle_dr_smp_recv. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
279 lines
8.2 KiB
C
279 lines
8.2 KiB
C
/*
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* Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <rdma/ib_smi.h>
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#include "smi.h"
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static enum smi_action __smi_handle_dr_smp_send(u8 node_type, int port_num,
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u8 *hop_ptr, u8 hop_cnt,
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const u8 *initial_path,
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const u8 *return_path,
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u8 direction,
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bool dr_dlid_is_permissive,
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bool dr_slid_is_permissive)
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{
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/* See section 14.2.2.2, Vol 1 IB spec */
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/* C14-6 -- valid hop_cnt values are from 0 to 63 */
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if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
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return IB_SMI_DISCARD;
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if (!direction) {
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/* C14-9:1 */
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if (hop_cnt && *hop_ptr == 0) {
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(*hop_ptr)++;
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return (initial_path[*hop_ptr] ==
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port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-9:2 */
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if (*hop_ptr && *hop_ptr < hop_cnt) {
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if (node_type != RDMA_NODE_IB_SWITCH)
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return IB_SMI_DISCARD;
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/* return_path set when received */
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(*hop_ptr)++;
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return (initial_path[*hop_ptr] ==
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port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-9:3 -- We're at the end of the DR segment of path */
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if (*hop_ptr == hop_cnt) {
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/* return_path set when received */
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(*hop_ptr)++;
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return (node_type == RDMA_NODE_IB_SWITCH ||
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dr_dlid_is_permissive ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
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/* C14-9:5 -- Fail unreasonable hop pointer */
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return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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} else {
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/* C14-13:1 */
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if (hop_cnt && *hop_ptr == hop_cnt + 1) {
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(*hop_ptr)--;
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return (return_path[*hop_ptr] ==
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port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:2 */
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if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
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if (node_type != RDMA_NODE_IB_SWITCH)
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return IB_SMI_DISCARD;
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(*hop_ptr)--;
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return (return_path[*hop_ptr] ==
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port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:3 -- at the end of the DR segment of path */
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if (*hop_ptr == 1) {
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(*hop_ptr)--;
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/* C14-13:3 -- SMPs destined for SM shouldn't be here */
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return (node_type == RDMA_NODE_IB_SWITCH ||
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dr_slid_is_permissive ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */
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if (*hop_ptr == 0)
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return IB_SMI_HANDLE;
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/* C14-13:5 -- Check for unreasonable hop pointer */
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return IB_SMI_DISCARD;
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}
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}
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/*
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* Fixup a directed route SMP for sending
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* Return IB_SMI_DISCARD if the SMP should be discarded
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*/
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enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
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u8 node_type, int port_num)
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{
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return __smi_handle_dr_smp_send(node_type, port_num,
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&smp->hop_ptr, smp->hop_cnt,
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smp->initial_path,
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smp->return_path,
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ib_get_smp_direction(smp),
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smp->dr_dlid == IB_LID_PERMISSIVE,
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smp->dr_slid == IB_LID_PERMISSIVE);
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}
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static enum smi_action __smi_handle_dr_smp_recv(u8 node_type, int port_num,
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int phys_port_cnt,
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u8 *hop_ptr, u8 hop_cnt,
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const u8 *initial_path,
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u8 *return_path,
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u8 direction,
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bool dr_dlid_is_permissive,
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bool dr_slid_is_permissive)
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{
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/* See section 14.2.2.2, Vol 1 IB spec */
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/* C14-6 -- valid hop_cnt values are from 0 to 63 */
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if (hop_cnt >= IB_SMP_MAX_PATH_HOPS)
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return IB_SMI_DISCARD;
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if (!direction) {
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/* C14-9:1 -- sender should have incremented hop_ptr */
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if (hop_cnt && *hop_ptr == 0)
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return IB_SMI_DISCARD;
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/* C14-9:2 -- intermediate hop */
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if (*hop_ptr && *hop_ptr < hop_cnt) {
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if (node_type != RDMA_NODE_IB_SWITCH)
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return IB_SMI_DISCARD;
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return_path[*hop_ptr] = port_num;
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/* hop_ptr updated when sending */
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return (initial_path[*hop_ptr+1] <= phys_port_cnt ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-9:3 -- We're at the end of the DR segment of path */
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if (*hop_ptr == hop_cnt) {
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if (hop_cnt)
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return_path[*hop_ptr] = port_num;
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/* hop_ptr updated when sending */
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return (node_type == RDMA_NODE_IB_SWITCH ||
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dr_dlid_is_permissive ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
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/* C14-9:5 -- fail unreasonable hop pointer */
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return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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} else {
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/* C14-13:1 */
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if (hop_cnt && *hop_ptr == hop_cnt + 1) {
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(*hop_ptr)--;
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return (return_path[*hop_ptr] ==
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port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:2 */
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if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) {
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if (node_type != RDMA_NODE_IB_SWITCH)
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return IB_SMI_DISCARD;
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/* hop_ptr updated when sending */
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return (return_path[*hop_ptr-1] <= phys_port_cnt ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:3 -- We're at the end of the DR segment of path */
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if (*hop_ptr == 1) {
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if (dr_slid_is_permissive) {
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/* giving SMP to SM - update hop_ptr */
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(*hop_ptr)--;
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return IB_SMI_HANDLE;
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}
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/* hop_ptr updated when sending */
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return (node_type == RDMA_NODE_IB_SWITCH ?
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IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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/* C14-13:4 -- hop_ptr = 0 -> give to SM */
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/* C14-13:5 -- Check for unreasonable hop pointer */
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return (*hop_ptr == 0 ? IB_SMI_HANDLE : IB_SMI_DISCARD);
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}
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}
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/*
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* Adjust information for a received SMP
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* Return IB_SMI_DISCARD if the SMP should be dropped
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*/
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enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, u8 node_type,
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int port_num, int phys_port_cnt)
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{
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return __smi_handle_dr_smp_recv(node_type, port_num, phys_port_cnt,
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&smp->hop_ptr, smp->hop_cnt,
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smp->initial_path,
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smp->return_path,
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ib_get_smp_direction(smp),
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smp->dr_dlid == IB_LID_PERMISSIVE,
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smp->dr_slid == IB_LID_PERMISSIVE);
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}
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enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp)
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{
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u8 hop_ptr, hop_cnt;
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hop_ptr = smp->hop_ptr;
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hop_cnt = smp->hop_cnt;
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if (!ib_get_smp_direction(smp)) {
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/* C14-9:2 -- intermediate hop */
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if (hop_ptr && hop_ptr < hop_cnt)
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return IB_SMI_FORWARD;
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/* C14-9:3 -- at the end of the DR segment of path */
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if (hop_ptr == hop_cnt)
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return (smp->dr_dlid == IB_LID_PERMISSIVE ?
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IB_SMI_SEND : IB_SMI_LOCAL);
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/* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
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if (hop_ptr == hop_cnt + 1)
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return IB_SMI_SEND;
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} else {
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/* C14-13:2 -- intermediate hop */
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if (2 <= hop_ptr && hop_ptr <= hop_cnt)
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return IB_SMI_FORWARD;
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/* C14-13:3 -- at the end of the DR segment of path */
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if (hop_ptr == 1)
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return (smp->dr_slid != IB_LID_PERMISSIVE ?
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IB_SMI_SEND : IB_SMI_LOCAL);
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}
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return IB_SMI_LOCAL;
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}
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/*
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* Return the forwarding port number from initial_path for outgoing SMP and
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* from return_path for returning SMP
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*/
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int smi_get_fwd_port(struct ib_smp *smp)
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{
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return (!ib_get_smp_direction(smp) ? smp->initial_path[smp->hop_ptr+1] :
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smp->return_path[smp->hop_ptr-1]);
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}
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