From: Roland Dreier <roland@topspin.com>
To: davem@davemloft.net
Cc: netdev@oss.sgi.com, linux-kernel@vger.kernel.org,
openib-general@openib.org
Subject: [PATCH][v5][7/24] Add InfiniBand MAD SMI support
Date: Mon, 27 Dec 2004 21:51:00 -0800 [thread overview]
Message-ID: <200412272151.7VvrtyAsRwgOK3mP@topspin.com> (raw)
In-Reply-To: <200412272150.vaYM2cWv3KsWVYPV@topspin.com>
Add MAD layer SMI (Subnet Management Interface) code.
Signed-off-by: Roland Dreier <roland@topspin.com>
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/core/smi.c 2004-12-27 21:48:20.566938847 -0800
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
+ * Copyright (c) 2004 Intel Corporation. All rights reserved.
+ * Copyright (c) 2004 Topspin Corporation. All rights reserved.
+ * Copyright (c) 2004 Voltaire 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.
+ *
+ * $Id: smi.c 1389 2004-12-27 22:56:47Z roland $
+ */
+
+#include <ib_smi.h>
+
+
+/*
+ * Fixup a directed route SMP for sending
+ * Return 0 if the SMP should be discarded
+ */
+int 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);
+ }
+
+ /* C14-9:2 */
+ if (hop_ptr && hop_ptr < hop_cnt) {
+ if (node_type != IB_NODE_SWITCH)
+ return 0;
+
+ /* smp->return_path set when received */
+ smp->hop_ptr++;
+ return (smp->initial_path[smp->hop_ptr] ==
+ port_num);
+ }
+
+ /* 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 == IB_NODE_SWITCH ||
+ smp->dr_dlid == IB_LID_PERMISSIVE);
+ }
+
+ /* 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);
+
+ } else {
+ /* C14-13:1 */
+ if (hop_cnt && hop_ptr == hop_cnt + 1) {
+ smp->hop_ptr--;
+ return (smp->return_path[smp->hop_ptr] ==
+ port_num);
+ }
+
+ /* C14-13:2 */
+ if (2 <= hop_ptr && hop_ptr <= hop_cnt) {
+ if (node_type != IB_NODE_SWITCH)
+ return 0;
+
+ smp->hop_ptr--;
+ return (smp->return_path[smp->hop_ptr] ==
+ port_num);
+ }
+
+ /* 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 == IB_NODE_SWITCH ||
+ smp->dr_slid == IB_LID_PERMISSIVE);
+ }
+
+ /* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */
+ if (hop_ptr == 0)
+ return 1;
+
+ /* C14-13:5 -- Check for unreasonable hop pointer */
+ return 0;
+ }
+}
+
+/*
+ * Adjust information for a received SMP
+ * Return 0 if the SMP should be dropped
+ */
+int 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 0;
+
+ /* C14-9:2 -- intermediate hop */
+ if (hop_ptr && hop_ptr < hop_cnt) {
+ if (node_type != IB_NODE_SWITCH)
+ return 0;
+
+ smp->return_path[hop_ptr] = port_num;
+ /* smp->hop_ptr updated when sending */
+ return (smp->initial_path[hop_ptr+1] <= phys_port_cnt);
+ }
+
+ /* 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 == IB_NODE_SWITCH ||
+ smp->dr_dlid == IB_LID_PERMISSIVE);
+ }
+
+ /* 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);
+
+ } else {
+
+ /* C14-13:1 */
+ if (hop_cnt && hop_ptr == hop_cnt + 1) {
+ smp->hop_ptr--;
+ return (smp->return_path[smp->hop_ptr] ==
+ port_num);
+ }
+
+ /* C14-13:2 */
+ if (2 <= hop_ptr && hop_ptr <= hop_cnt) {
+ if (node_type != IB_NODE_SWITCH)
+ return 0;
+
+ /* smp->hop_ptr updated when sending */
+ return (smp->return_path[hop_ptr-1] <= phys_port_cnt);
+ }
+
+ /* 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 1;
+ }
+ /* smp->hop_ptr updated when sending */
+ return (node_type == IB_NODE_SWITCH);
+ }
+
+ /* C14-13:4 -- hop_ptr = 0 -> give to SM */
+ /* C14-13:5 -- Check for unreasonable hop pointer */
+ return (hop_ptr == 0);
+ }
+}
+
+/*
+ * Return 1 if the received DR SMP should be forwarded to the send queue
+ * Return 0 if the SMP should be completed up the stack
+ */
+int 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 1;
+
+ /* C14-9:3 -- at the end of the DR segment of path */
+ if (hop_ptr == hop_cnt)
+ return (smp->dr_dlid == IB_LID_PERMISSIVE);
+
+ /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */
+ if (hop_ptr == hop_cnt + 1)
+ return 1;
+ } else {
+ /* C14-13:2 */
+ if (2 <= hop_ptr && hop_ptr <= hop_cnt)
+ return 1;
+
+ /* C14-13:3 -- at the end of the DR segment of path */
+ if (hop_ptr == 1)
+ return (smp->dr_slid != IB_LID_PERMISSIVE);
+ }
+ return 0;
+}
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-bk/drivers/infiniband/core/smi.h 2004-12-27 21:48:20.592935020 -0800
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
+ * Copyright (c) 2004 Intel Corporation. All rights reserved.
+ * Copyright (c) 2004 Topspin Corporation. All rights reserved.
+ * Copyright (c) 2004 Voltaire 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.
+ *
+ * $Id: smi.h 1389 2004-12-27 22:56:47Z roland $
+ */
+
+#ifndef __SMI_H_
+#define __SMI_H_
+
+int smi_handle_dr_smp_recv(struct ib_smp *smp,
+ u8 node_type,
+ int port_num,
+ int phys_port_cnt);
+extern int smi_check_forward_dr_smp(struct ib_smp *smp);
+extern int smi_handle_dr_smp_send(struct ib_smp *smp,
+ u8 node_type,
+ int port_num);
+extern int smi_check_local_dr_smp(struct ib_smp *smp,
+ struct ib_device *device,
+ int port_num);
+
+/*
+ * Return 1 if the SMP should be handled by the local SMA/SM via process_mad
+ */
+static inline int smi_check_local_smp(struct ib_mad_agent *mad_agent,
+ struct ib_smp *smp)
+{
+ /* C14-9:3 -- We're at the end of the DR segment of path */
+ /* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
+ return ((mad_agent->device->process_mad &&
+ !ib_get_smp_direction(smp) &&
+ (smp->hop_ptr == smp->hop_cnt + 1)));
+}
+
+#endif /* __SMI_H_ */
next prev parent reply other threads:[~2004-12-28 5:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-28 5:50 [PATCH][v5][0/24] Latest IB patch queue Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][1/24] Add core InfiniBand support (public headers) Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][2/24] Add core InfiniBand support Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][3/24] Hook up drivers/infiniband Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][4/24] Add InfiniBand MAD (management datagram) support (public headers) Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][5/24] Add InfiniBand MAD (management datagram) support Roland Dreier
2004-12-28 5:50 ` [PATCH][v5][6/24] Add InfiniBand MAD (management datagram) support (private headers) Roland Dreier
2004-12-28 5:51 ` Roland Dreier [this message]
2004-12-28 5:51 ` [PATCH][v5][8/24] Add InfiniBand SA (Subnet Administration) query support Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][9/24] Add Mellanox HCA low-level driver Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][10/24] Add Mellanox HCA low-level driver (midlayer interface) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][11/24] Add Mellanox HCA low-level driver (FW commands) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][12/24] Add Mellanox HCA low-level driver (EQ) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][13/24] Add Mellanox HCA low-level driver (initialization) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][14/24] Add Mellanox HCA low-level driver (QP/CQ) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][15/24] Add Mellanox HCA low-level driver (last bits) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][16/24] Add Mellanox HCA low-level driver (MAD) Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][17/24] IPoIB IPv4 multicast Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][18/24] IPoIB IPv6 support Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][19/24] Add IPoIB (IP-over-InfiniBand) driver Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][20/24] Add IPoIB multicast & partition code Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][21/24] Add InfiniBand userspace MAD support Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][22/24] Document InfiniBand ioctl use Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][23/24] Add InfiniBand Documentation files Roland Dreier
2004-12-28 5:51 ` [PATCH][v5][24/24] InfiniBand MAINTAINERS entry Roland Dreier
2004-12-28 6:54 ` [PATCH][v5][0/24] Latest IB patch queue David S. Miller
2004-12-28 19:48 ` Roland Dreier
2004-12-28 22:17 ` David S. Miller
2004-12-28 23:24 ` Roland Dreier
2004-12-29 1:28 ` Karen Shaeffer
2004-12-29 1:36 ` Roland Dreier
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