mirror of
https://github.com/torvalds/linux.git
synced 2024-12-15 15:41:58 +00:00
af808ece5c
SA queries SM for class port info when there is a LID_CHANGE event.
When a base lid is configured before fm is started ie when smlid is
not yet assigned, SA handles the LID_CHANGE event and tries query SM
with lid 0. This will cause an hang.
[ 1106.958820] INFO: task kworker/2:0:23 blocked for more than 120 seconds.
[ 1106.965082] Tainted: G O 4.12.0+ #1
[ 1106.969602] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 1106.977227] kworker/2:0 D 0 23 2 0x00000000
[ 1106.977250] Workqueue: infiniband update_ib_cpi [ib_core]
[ 1106.977261] Call Trace:
[ 1106.977273] __schedule+0x28e/0x860
[ 1106.977285] schedule+0x36/0x80
[ 1106.977298] schedule_timeout+0x1a3/0x2e0
[ 1106.977310] ? radix_tree_iter_tag_clear+0x1b/0x20
[ 1106.977322] ? idr_alloc+0x64/0x90
[ 1106.977334] wait_for_completion+0xe3/0x140
[ 1106.977347] ? wake_up_q+0x80/0x80
[ 1106.977369] update_ib_cpi+0x163/0x210 [ib_core]
[ 1106.977381] process_one_work+0x147/0x370
[ 1106.977394] worker_thread+0x4a/0x390
[ 1106.977406] kthread+0x109/0x140
[ 1106.977418] ? process_one_work+0x370/0x370
[ 1106.977430] ? kthread_park+0x60/0x60
[ 1106.977443] ret_from_fork+0x22/0x30
Always ensure a proper smlid is assigned before querying SM for cpi.
Fixes: ee1c60b1bf ("IB/SA: Modify SA to implicitly cache Class Port info")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/*
|
|
* Copyright(c) 2017 Intel Corporation.
|
|
*
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
|
* redistributing this file, you may do so under either license.
|
|
*
|
|
* GPL LICENSE SUMMARY
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* BSD LICENSE
|
|
*
|
|
* 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.
|
|
* - Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#ifndef OPA_ADDR_H
|
|
#define OPA_ADDR_H
|
|
|
|
#include <rdma/opa_smi.h>
|
|
|
|
#define OPA_SPECIAL_OUI (0x00066AULL)
|
|
#define OPA_MAKE_ID(x) (cpu_to_be64(OPA_SPECIAL_OUI << 40 | (x)))
|
|
#define OPA_TO_IB_UCAST_LID(x) (((x) >= be16_to_cpu(IB_MULTICAST_LID_BASE)) \
|
|
? 0 : x)
|
|
#define OPA_GID_INDEX 0x1
|
|
/**
|
|
* 0xF8 - 4 bits of multicast range and 1 bit for collective range
|
|
* Example: For 24 bit LID space,
|
|
* Multicast range: 0xF00000 to 0xF7FFFF
|
|
* Collective range: 0xF80000 to 0xFFFFFE
|
|
*/
|
|
#define OPA_MCAST_NR 0x4 /* Number of top bits set */
|
|
#define OPA_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
|
|
|
|
/**
|
|
* ib_is_opa_gid: Returns true if the top 24 bits of the gid
|
|
* contains the OPA_STL_OUI identifier. This identifies that
|
|
* the provided gid is a special purpose GID meant to carry
|
|
* extended LID information.
|
|
*
|
|
* @gid: The Global identifier
|
|
*/
|
|
static inline bool ib_is_opa_gid(const union ib_gid *gid)
|
|
{
|
|
return ((be64_to_cpu(gid->global.interface_id) >> 40) ==
|
|
OPA_SPECIAL_OUI);
|
|
}
|
|
|
|
/**
|
|
* opa_get_lid_from_gid: Returns the last 32 bits of the gid.
|
|
* OPA devices use one of the gids in the gid table to also
|
|
* store the lid.
|
|
*
|
|
* @gid: The Global identifier
|
|
*/
|
|
static inline u32 opa_get_lid_from_gid(const union ib_gid *gid)
|
|
{
|
|
return be64_to_cpu(gid->global.interface_id) & 0xFFFFFFFF;
|
|
}
|
|
|
|
/**
|
|
* opa_is_extended_lid: Returns true if dlid or slid are
|
|
* extended.
|
|
*
|
|
* @dlid: The DLID
|
|
* @slid: The SLID
|
|
*/
|
|
static inline bool opa_is_extended_lid(__be32 dlid, __be32 slid)
|
|
{
|
|
if ((be32_to_cpu(dlid) >=
|
|
be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
|
|
(be32_to_cpu(slid) >=
|
|
be16_to_cpu(IB_MULTICAST_LID_BASE)))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Get multicast lid base */
|
|
static inline u32 opa_get_mcast_base(u32 nr_top_bits)
|
|
{
|
|
return (be32_to_cpu(OPA_LID_PERMISSIVE) << (32 - nr_top_bits));
|
|
}
|
|
|
|
/* Check for a valid unicast LID for non-SM traffic types */
|
|
static inline bool rdma_is_valid_unicast_lid(struct rdma_ah_attr *attr)
|
|
{
|
|
if (attr->type == RDMA_AH_ATTR_TYPE_IB) {
|
|
if (!rdma_ah_get_dlid(attr) ||
|
|
rdma_ah_get_dlid(attr) >=
|
|
be32_to_cpu(IB_MULTICAST_LID_BASE))
|
|
return false;
|
|
} else if (attr->type == RDMA_AH_ATTR_TYPE_OPA) {
|
|
if (!rdma_ah_get_dlid(attr) ||
|
|
rdma_ah_get_dlid(attr) >=
|
|
opa_get_mcast_base(OPA_MCAST_NR))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
#endif /* OPA_ADDR_H */
|