File: [Development] / linux-2.6-xfs / drivers / infiniband / core / smi.c (download)
Revision 1.13, Wed Sep 12 17:09:56 2007 UTC (10 years, 1 month ago) by tes.longdrop.melbourne.sgi.com
Branch: MAIN
CVS Tags: HEAD
Changes since 1.12: +13 -3
lines
Update 2.6.x-xfs to 2.6.23-rc4.
Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:
--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
xfs ioctl __user annotations
commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
mm: Remove slab destructors from kmem_cache_create().
commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
mm: fault feedback #1
commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
mm: merge populate and nopage into fault (fixes nonlinear)
commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
mm: fix fault vs invalidate race for linear mappings
commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
knfsd: exportfs: add exportfs.h header
commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
Freezer: make kernel threads nonfreezable by default
commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
mm: clean up and kernelify shrinker registration
commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
Add suspend-related notifications for CPU hotplug
commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
Fix occurrences of "the the "
commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.
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/*
* 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 0 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 */
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 0 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 */
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]);
}
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