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IB/ipoib: Increase ipoib Datagram mode MTU's upper limit

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Currently the ipoib UD mtu is restricted to 4K bytes. Remove this
limitation so that the IPOIB module can potentially use an MTU (in UD
mode) that is bounded by the MTU of the underlying device. A field is
added to the ib_port_attr structure to indicate the maximum physical
MTU the underlying device supports.

Link: https://lore.kernel.org/r/20200511160618.173205.23053.stgit@awfm-01.aw.intel.com
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sadanand Warrier <sadanand.warrier@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Kaike Wan
2020-05-11 12:06:18 -04:00
committed by Jason Gunthorpe
parent 19d8b90a50
commit 6d72344cf6
6 changed files with 88 additions and 32 deletions
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10
include/rdma/opa_port_info.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2017 Intel Corporation. All rights reserved.
* Copyright (c) 2014-2020 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
@@ -139,14 +139,6 @@
#define OPA_CAP_MASK3_IsVLMarkerSupported (1 << 1)
#define OPA_CAP_MASK3_IsVLrSupported (1 << 0)
/**
* new MTU values
*/
enum {
OPA_MTU_8192 = 6,
OPA_MTU_10240 = 7,
};
enum {
OPA_PORT_PHYS_CONF_DISCONNECTED = 0,
OPA_PORT_PHYS_CONF_STANDARD = 1,