339 lines
9.9 KiB
C
339 lines
9.9 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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* Copyright (c) 2014 Intel Corporation. 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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#include "opa_smi.h"
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static enum smi_action __smi_handle_dr_smp_send(bool is_switch, 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 (!is_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 (is_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 (!is_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 (is_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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bool is_switch, int port_num)
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{
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return __smi_handle_dr_smp_send(is_switch, 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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enum smi_action opa_smi_handle_dr_smp_send(struct opa_smp *smp,
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bool is_switch, int port_num)
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{
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return __smi_handle_dr_smp_send(is_switch, port_num,
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&smp->hop_ptr, smp->hop_cnt,
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smp->route.dr.initial_path,
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smp->route.dr.return_path,
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opa_get_smp_direction(smp),
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smp->route.dr.dr_dlid ==
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OPA_LID_PERMISSIVE,
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smp->route.dr.dr_slid ==
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OPA_LID_PERMISSIVE);
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}
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static enum smi_action __smi_handle_dr_smp_recv(bool is_switch, 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 (!is_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 (is_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 (!is_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 (is_switch ? 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, bool is_switch,
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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(is_switch, 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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/*
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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 opa_smi_handle_dr_smp_recv(struct opa_smp *smp, bool is_switch,
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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(is_switch, port_num, phys_port_cnt,
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&smp->hop_ptr, smp->hop_cnt,
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smp->route.dr.initial_path,
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smp->route.dr.return_path,
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opa_get_smp_direction(smp),
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smp->route.dr.dr_dlid ==
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OPA_LID_PERMISSIVE,
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smp->route.dr.dr_slid ==
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OPA_LID_PERMISSIVE);
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}
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static enum smi_forward_action __smi_check_forward_dr_smp(u8 hop_ptr, u8 hop_cnt,
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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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if (!direction) {
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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 (dr_dlid_is_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 (!dr_slid_is_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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enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp)
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{
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return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
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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 opa_smi_check_forward_dr_smp(struct opa_smp *smp)
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{
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return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt,
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opa_get_smp_direction(smp),
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smp->route.dr.dr_dlid ==
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OPA_LID_PERMISSIVE,
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smp->route.dr.dr_slid ==
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OPA_LID_PERMISSIVE);
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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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/*
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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 opa_smi_get_fwd_port(struct opa_smp *smp)
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{
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return !opa_get_smp_direction(smp) ? smp->route.dr.initial_path[smp->hop_ptr+1] :
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smp->route.dr.return_path[smp->hop_ptr-1];
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}
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