mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 13:45:13 +07:00
b78d28a2af
Return values of 0 do not make sense for functions which return enum smi_action Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
254 lines
7.5 KiB
C
254 lines
7.5 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* 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"
|
|
|
|
/*
|
|
* 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,
|
|
u8 node_type, int port_num)
|
|
{
|
|
u8 hop_ptr, hop_cnt;
|
|
|
|
hop_ptr = smp->hop_ptr;
|
|
hop_cnt = smp->hop_cnt;
|
|
|
|
/* 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 (!ib_get_smp_direction(smp)) {
|
|
/* C14-9:1 */
|
|
if (hop_cnt && hop_ptr == 0) {
|
|
smp->hop_ptr++;
|
|
return (smp->initial_path[smp->hop_ptr] ==
|
|
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
|
|
}
|
|
|
|
/* C14-9:2 */
|
|
if (hop_ptr && hop_ptr < hop_cnt) {
|
|
if (node_type != RDMA_NODE_IB_SWITCH)
|
|
return IB_SMI_DISCARD;
|
|
|
|
/* smp->return_path set when received */
|
|
smp->hop_ptr++;
|
|
return (smp->initial_path[smp->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) {
|
|
/* smp->return_path set when received */
|
|
smp->hop_ptr++;
|
|
return (node_type == RDMA_NODE_IB_SWITCH ||
|
|
smp->dr_dlid == IB_LID_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) {
|
|
smp->hop_ptr--;
|
|
return (smp->return_path[smp->hop_ptr] ==
|
|
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
|
|
}
|
|
|
|
/* C14-13:2 */
|
|
if (2 <= hop_ptr && hop_ptr <= hop_cnt) {
|
|
if (node_type != RDMA_NODE_IB_SWITCH)
|
|
return IB_SMI_DISCARD;
|
|
|
|
smp->hop_ptr--;
|
|
return (smp->return_path[smp->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) {
|
|
smp->hop_ptr--;
|
|
/* C14-13:3 -- SMPs destined for SM shouldn't be here */
|
|
return (node_type == RDMA_NODE_IB_SWITCH ||
|
|
smp->dr_slid == IB_LID_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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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, u8 node_type,
|
|
int port_num, int phys_port_cnt)
|
|
{
|
|
u8 hop_ptr, hop_cnt;
|
|
|
|
hop_ptr = smp->hop_ptr;
|
|
hop_cnt = smp->hop_cnt;
|
|
|
|
/* 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 (!ib_get_smp_direction(smp)) {
|
|
/* 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 (node_type != RDMA_NODE_IB_SWITCH)
|
|
return IB_SMI_DISCARD;
|
|
|
|
smp->return_path[hop_ptr] = port_num;
|
|
/* smp->hop_ptr updated when sending */
|
|
return (smp->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)
|
|
smp->return_path[hop_ptr] = port_num;
|
|
/* smp->hop_ptr updated when sending */
|
|
|
|
return (node_type == RDMA_NODE_IB_SWITCH ||
|
|
smp->dr_dlid == IB_LID_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) {
|
|
smp->hop_ptr--;
|
|
return (smp->return_path[smp->hop_ptr] ==
|
|
port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD);
|
|
}
|
|
|
|
/* C14-13:2 */
|
|
if (2 <= hop_ptr && hop_ptr <= hop_cnt) {
|
|
if (node_type != RDMA_NODE_IB_SWITCH)
|
|
return IB_SMI_DISCARD;
|
|
|
|
/* smp->hop_ptr updated when sending */
|
|
return (smp->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 (smp->dr_slid == IB_LID_PERMISSIVE) {
|
|
/* giving SMP to SM - update hop_ptr */
|
|
smp->hop_ptr--;
|
|
return IB_SMI_HANDLE;
|
|
}
|
|
/* smp->hop_ptr updated when sending */
|
|
return (node_type == RDMA_NODE_IB_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);
|
|
}
|
|
}
|
|
|
|
enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp)
|
|
{
|
|
u8 hop_ptr, hop_cnt;
|
|
|
|
hop_ptr = smp->hop_ptr;
|
|
hop_cnt = smp->hop_cnt;
|
|
|
|
if (!ib_get_smp_direction(smp)) {
|
|
/* 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 (smp->dr_dlid == IB_LID_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 (smp->dr_slid != IB_LID_PERMISSIVE ?
|
|
IB_SMI_SEND : IB_SMI_LOCAL);
|
|
}
|
|
return IB_SMI_LOCAL;
|
|
}
|
|
|
|
/*
|
|
* 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]);
|
|
}
|