From db797b394dd13645e14edc39e221a9507e689c59 Mon Sep 17 00:00:00 2001
From: ftillier <ftillier@ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86>
Date: Tue, 25 Apr 2006 18:33:56 +0000
Subject: [PATCH] [IPoIB] Add support for generating unique MACs from Voltaire
 port GUIDS.

Submitted by Guy Corem (guyc@voltaire.com)


git-svn-id: svn://openib.tc.cornell.edu/gen1/trunk@327 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86
---
 ulp/ipoib/kernel/ipoib_xfr_mgr.h | 56 +++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 4 deletions(-)

diff --git a/ulp/ipoib/kernel/ipoib_xfr_mgr.h b/ulp/ipoib/kernel/ipoib_xfr_mgr.h
index b29fa413..2796194b 100644
--- a/ulp/ipoib/kernel/ipoib_xfr_mgr.h
+++ b/ulp/ipoib/kernel/ipoib_xfr_mgr.h
@@ -244,9 +244,51 @@ ipoib_mac_from_mlx_guid(
 *	IB_INVALID_GUID
 *		The port GUID provided was not a known GUID format.
 *
-* NOTES
-*	The algorithm to convert portGuid to MAC address is as per DN0074, and
-*	assumes a 2 port HCA.
+* SEE ALSO
+*	IPOIB
+*********/
+
+
+/****f* IPOIB/ipoib_mac_from_voltaire_guid
+* NAME
+*	ipoib_mac_from_voltaire_guid
+*
+* DESCRIPTION
+*	Generates an ethernet MAC address given a Voltaire port GUID.
+*
+* SYNOPSIS
+*/
+static inline ib_api_status_t
+ipoib_mac_from_voltaire_guid(
+	IN		const	net64_t						port_guid,
+		OUT			mac_addr_t* const			p_mac_addr )
+{
+	const uint8_t	*p_guid = (const uint8_t*)&port_guid;
+
+	/* Port guid is in network byte order.  OUI is in lower 3 bytes. */
+	ASSERT( p_guid[0] == 0x00 && p_guid[1] == 0x08 && p_guid[2] == 0xf1 );
+
+	p_mac_addr->addr[0] = p_guid[0];
+	p_mac_addr->addr[1] = p_guid[1];
+	p_mac_addr->addr[2] = p_guid[2];
+	p_mac_addr->addr[3] = p_guid[4] ^ p_guid[6];
+	p_mac_addr->addr[4] = p_guid[5] ^ p_guid[7];
+	p_mac_addr->addr[5] = p_guid[5] + p_guid[6] + p_guid[7];
+
+	return IB_SUCCESS;
+}
+/*
+* PARAMETERS
+*	port_guid
+*		The port GUID, in network byte order, for which to generate a
+*		MAC address.
+*
+*	p_mac_addr
+*		Pointer to a mac address in which to store the results.
+*
+* RETURN VALUES
+*	IB_SUCCESS
+*		The MAC address was successfully converted.
 *
 * SEE ALSO
 *	IPOIB
@@ -278,12 +320,18 @@ ipoib_mac_from_guid(
 		if( status == IB_SUCCESS )
 			return IB_SUCCESS;
 	}
-	if( p_guid[0] == 0x00 && p_guid[1] == 0x02 && p_guid[2] == 0xc9 )
+	else if( p_guid[0] == 0x00 && p_guid[1] == 0x02 && p_guid[2] == 0xc9 )
 	{
 		status = ipoib_mac_from_mlx_guid( port_guid, p_mac_addr );
 		if( status == IB_SUCCESS )
 			return IB_SUCCESS;
 	}
+	else if( p_guid[0] == 0x00 && p_guid[1] == 0x08 && p_guid[2] == 0xf1 )
+	{
+		status = ipoib_mac_from_voltaire_guid( port_guid, p_mac_addr );
+		if( status == IB_SUCCESS )
+			return IB_SUCCESS;
+	}
 	
 	/* Value of zero is reserved. */
 	laa = cl_atomic_inc( &g_ipoib.laa_idx );
-- 
2.17.1