| /* | |
| * Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved. | |
| * Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved. | |
| * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. | |
| * Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved. | |
| * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved. | |
| * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. | |
| * Copyright (c) 2014 Intel Corporation. All rights reserved. | |
| * | |
| * This software is available to you under a choice of one of two | |
| * licenses. You may choose to be licensed under the terms of the GNU | |
| * General Public License (GPL) Version 2, available from the file | |
| * COPYING in the main directory of this source tree, or the | |
| * OpenIB.org BSD license below: | |
| * | |
| * Redistribution and use in source and binary forms, with or | |
| * without modification, are permitted provided that the following | |
| * conditions are met: | |
| * | |
| * - Redistributions of source code must retain the above | |
| * copyright notice, this list of conditions and the following | |
| * disclaimer. | |
| * | |
| * - Redistributions in binary form must reproduce the above | |
| * copyright notice, this list of conditions and the following | |
| * disclaimer in the documentation and/or other materials | |
| * provided with the distribution. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| * SOFTWARE. | |
| * | |
| */ | |
| #include <rdma/ib_smi.h> | |
| #include "smi.h" | |
| #include "opa_smi.h" | |
| static enum smi_action __smi_handle_dr_smp_send(bool is_switch, int port_num, | |
| u8 *hop_ptr, u8 hop_cnt, | |
| const u8 *initial_path, | |
| const u8 *return_path, | |
| u8 direction, | |
| bool dr_dlid_is_permissive, | |
| bool dr_slid_is_permissive) | |
| { | |
| /* See section 14.2.2.2, Vol 1 IB spec */ | |
| /* C14-6 -- valid hop_cnt values are from 0 to 63 */ | |
| if (hop_cnt >= IB_SMP_MAX_PATH_HOPS) | |
| return IB_SMI_DISCARD; | |
| if (!direction) { | |
| /* C14-9:1 */ | |
| if (hop_cnt && *hop_ptr == 0) { | |
| (*hop_ptr)++; | |
| return (initial_path[*hop_ptr] == | |
| port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-9:2 */ | |
| if (*hop_ptr && *hop_ptr < hop_cnt) { | |
| if (!is_switch) | |
| return IB_SMI_DISCARD; | |
| /* return_path set when received */ | |
| (*hop_ptr)++; | |
| return (initial_path[*hop_ptr] == | |
| port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-9:3 -- We're at the end of the DR segment of path */ | |
| if (*hop_ptr == hop_cnt) { | |
| /* return_path set when received */ | |
| (*hop_ptr)++; | |
| return (is_switch || | |
| dr_dlid_is_permissive ? | |
| IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */ | |
| /* C14-9:5 -- Fail unreasonable hop pointer */ | |
| return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } else { | |
| /* C14-13:1 */ | |
| if (hop_cnt && *hop_ptr == hop_cnt + 1) { | |
| (*hop_ptr)--; | |
| return (return_path[*hop_ptr] == | |
| port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:2 */ | |
| if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) { | |
| if (!is_switch) | |
| return IB_SMI_DISCARD; | |
| (*hop_ptr)--; | |
| return (return_path[*hop_ptr] == | |
| port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:3 -- at the end of the DR segment of path */ | |
| if (*hop_ptr == 1) { | |
| (*hop_ptr)--; | |
| /* C14-13:3 -- SMPs destined for SM shouldn't be here */ | |
| return (is_switch || | |
| dr_slid_is_permissive ? | |
| IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */ | |
| if (*hop_ptr == 0) | |
| return IB_SMI_HANDLE; | |
| /* C14-13:5 -- Check for unreasonable hop pointer */ | |
| return IB_SMI_DISCARD; | |
| } | |
| } | |
| /* | |
| * Fixup a directed route SMP for sending | |
| * Return IB_SMI_DISCARD if the SMP should be discarded | |
| */ | |
| enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp, | |
| bool is_switch, int port_num) | |
| { | |
| return __smi_handle_dr_smp_send(is_switch, port_num, | |
| &smp->hop_ptr, smp->hop_cnt, | |
| smp->initial_path, | |
| smp->return_path, | |
| ib_get_smp_direction(smp), | |
| smp->dr_dlid == IB_LID_PERMISSIVE, | |
| smp->dr_slid == IB_LID_PERMISSIVE); | |
| } | |
| enum smi_action opa_smi_handle_dr_smp_send(struct opa_smp *smp, | |
| bool is_switch, int port_num) | |
| { | |
| return __smi_handle_dr_smp_send(is_switch, port_num, | |
| &smp->hop_ptr, smp->hop_cnt, | |
| smp->route.dr.initial_path, | |
| smp->route.dr.return_path, | |
| opa_get_smp_direction(smp), | |
| smp->route.dr.dr_dlid == | |
| OPA_LID_PERMISSIVE, | |
| smp->route.dr.dr_slid == | |
| OPA_LID_PERMISSIVE); | |
| } | |
| static enum smi_action __smi_handle_dr_smp_recv(bool is_switch, int port_num, | |
| int phys_port_cnt, | |
| u8 *hop_ptr, u8 hop_cnt, | |
| const u8 *initial_path, | |
| u8 *return_path, | |
| u8 direction, | |
| bool dr_dlid_is_permissive, | |
| bool dr_slid_is_permissive) | |
| { | |
| /* See section 14.2.2.2, Vol 1 IB spec */ | |
| /* C14-6 -- valid hop_cnt values are from 0 to 63 */ | |
| if (hop_cnt >= IB_SMP_MAX_PATH_HOPS) | |
| return IB_SMI_DISCARD; | |
| if (!direction) { | |
| /* C14-9:1 -- sender should have incremented hop_ptr */ | |
| if (hop_cnt && *hop_ptr == 0) | |
| return IB_SMI_DISCARD; | |
| /* C14-9:2 -- intermediate hop */ | |
| if (*hop_ptr && *hop_ptr < hop_cnt) { | |
| if (!is_switch) | |
| return IB_SMI_DISCARD; | |
| return_path[*hop_ptr] = port_num; | |
| /* hop_ptr updated when sending */ | |
| return (initial_path[*hop_ptr+1] <= phys_port_cnt ? | |
| IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-9:3 -- We're at the end of the DR segment of path */ | |
| if (*hop_ptr == hop_cnt) { | |
| if (hop_cnt) | |
| return_path[*hop_ptr] = port_num; | |
| /* hop_ptr updated when sending */ | |
| return (is_switch || | |
| dr_dlid_is_permissive ? | |
| IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */ | |
| /* C14-9:5 -- fail unreasonable hop pointer */ | |
| return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } else { | |
| /* C14-13:1 */ | |
| if (hop_cnt && *hop_ptr == hop_cnt + 1) { | |
| (*hop_ptr)--; | |
| return (return_path[*hop_ptr] == | |
| port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:2 */ | |
| if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) { | |
| if (!is_switch) | |
| return IB_SMI_DISCARD; | |
| /* hop_ptr updated when sending */ | |
| return (return_path[*hop_ptr-1] <= phys_port_cnt ? | |
| IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:3 -- We're at the end of the DR segment of path */ | |
| if (*hop_ptr == 1) { | |
| if (dr_slid_is_permissive) { | |
| /* giving SMP to SM - update hop_ptr */ | |
| (*hop_ptr)--; | |
| return IB_SMI_HANDLE; | |
| } | |
| /* hop_ptr updated when sending */ | |
| return (is_switch ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| /* C14-13:4 -- hop_ptr = 0 -> give to SM */ | |
| /* C14-13:5 -- Check for unreasonable hop pointer */ | |
| return (*hop_ptr == 0 ? IB_SMI_HANDLE : IB_SMI_DISCARD); | |
| } | |
| } | |
| /* | |
| * Adjust information for a received SMP | |
| * Return IB_SMI_DISCARD if the SMP should be dropped | |
| */ | |
| enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch, | |
| int port_num, int phys_port_cnt) | |
| { | |
| return __smi_handle_dr_smp_recv(is_switch, port_num, phys_port_cnt, | |
| &smp->hop_ptr, smp->hop_cnt, | |
| smp->initial_path, | |
| smp->return_path, | |
| ib_get_smp_direction(smp), | |
| smp->dr_dlid == IB_LID_PERMISSIVE, | |
| smp->dr_slid == IB_LID_PERMISSIVE); | |
| } | |
| /* | |
| * Adjust information for a received SMP | |
| * Return IB_SMI_DISCARD if the SMP should be dropped | |
| */ | |
| enum smi_action opa_smi_handle_dr_smp_recv(struct opa_smp *smp, bool is_switch, | |
| int port_num, int phys_port_cnt) | |
| { | |
| return __smi_handle_dr_smp_recv(is_switch, port_num, phys_port_cnt, | |
| &smp->hop_ptr, smp->hop_cnt, | |
| smp->route.dr.initial_path, | |
| smp->route.dr.return_path, | |
| opa_get_smp_direction(smp), | |
| smp->route.dr.dr_dlid == | |
| OPA_LID_PERMISSIVE, | |
| smp->route.dr.dr_slid == | |
| OPA_LID_PERMISSIVE); | |
| } | |
| static enum smi_forward_action __smi_check_forward_dr_smp(u8 hop_ptr, u8 hop_cnt, | |
| u8 direction, | |
| bool dr_dlid_is_permissive, | |
| bool dr_slid_is_permissive) | |
| { | |
| if (!direction) { | |
| /* C14-9:2 -- intermediate hop */ | |
| if (hop_ptr && hop_ptr < hop_cnt) | |
| return IB_SMI_FORWARD; | |
| /* C14-9:3 -- at the end of the DR segment of path */ | |
| if (hop_ptr == hop_cnt) | |
| return (dr_dlid_is_permissive ? | |
| IB_SMI_SEND : IB_SMI_LOCAL); | |
| /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */ | |
| if (hop_ptr == hop_cnt + 1) | |
| return IB_SMI_SEND; | |
| } else { | |
| /* C14-13:2 -- intermediate hop */ | |
| if (2 <= hop_ptr && hop_ptr <= hop_cnt) | |
| return IB_SMI_FORWARD; | |
| /* C14-13:3 -- at the end of the DR segment of path */ | |
| if (hop_ptr == 1) | |
| return (!dr_slid_is_permissive ? | |
| IB_SMI_SEND : IB_SMI_LOCAL); | |
| } | |
| return IB_SMI_LOCAL; | |
| } | |
| enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp) | |
| { | |
| return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt, | |
| ib_get_smp_direction(smp), | |
| smp->dr_dlid == IB_LID_PERMISSIVE, | |
| smp->dr_slid == IB_LID_PERMISSIVE); | |
| } | |
| enum smi_forward_action opa_smi_check_forward_dr_smp(struct opa_smp *smp) | |
| { | |
| return __smi_check_forward_dr_smp(smp->hop_ptr, smp->hop_cnt, | |
| opa_get_smp_direction(smp), | |
| smp->route.dr.dr_dlid == | |
| OPA_LID_PERMISSIVE, | |
| smp->route.dr.dr_slid == | |
| OPA_LID_PERMISSIVE); | |
| } | |
| /* | |
| * Return the forwarding port number from initial_path for outgoing SMP and | |
| * from return_path for returning SMP | |
| */ | |
| int smi_get_fwd_port(struct ib_smp *smp) | |
| { | |
| return (!ib_get_smp_direction(smp) ? smp->initial_path[smp->hop_ptr+1] : | |
| smp->return_path[smp->hop_ptr-1]); | |
| } | |
| /* | |
| * Return the forwarding port number from initial_path for outgoing SMP and | |
| * from return_path for returning SMP | |
| */ | |
| int opa_smi_get_fwd_port(struct opa_smp *smp) | |
| { | |
| return !opa_get_smp_direction(smp) ? smp->route.dr.initial_path[smp->hop_ptr+1] : | |
| smp->route.dr.return_path[smp->hop_ptr-1]; | |
| } |