From cdcebf6830f9b7805f1d798e820387cf01d60311 Mon Sep 17 00:00:00 2001
From: ftillier <ftillier@ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86>
Date: Mon, 5 Dec 2005 17:35:07 +0000
Subject: [PATCH] [IPoIB] Add support for generating globally unique Ethernet
 MAC addresses from Mellanox GUIDs.

Submitted by Yossi Leybovich (sleybo@mellanox.co.il)


git-svn-id: svn://openib.tc.cornell.edu/gen1@194 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86
---
 trunk/ulp/ipoib/kernel/ipoib_xfr_mgr.h | 138 ++++++++++++++++++++++++-
 1 file changed, 134 insertions(+), 4 deletions(-)

diff --git a/trunk/ulp/ipoib/kernel/ipoib_xfr_mgr.h b/trunk/ulp/ipoib/kernel/ipoib_xfr_mgr.h
index 2b5a3b88..84d3c7c9 100644
--- a/trunk/ulp/ipoib/kernel/ipoib_xfr_mgr.h
+++ b/trunk/ulp/ipoib/kernel/ipoib_xfr_mgr.h
@@ -191,6 +191,68 @@ ipoib_mac_from_sst_guid(
 *********/
 
 
+/****f* IPOIB/ipoib_mac_from_mlx_guid
+* NAME
+*	ipoib_mac_from_sst_guid
+*
+* DESCRIPTION
+*	Generates an ethernet MAC address given a Mellanox port GUID.
+*
+* SYNOPSIS
+*/
+static inline ib_api_status_t
+ipoib_mac_from_mlx_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;
+	uint32_t		low24;
+
+	/* Port guid is in network byte order.  OUI is in lower 3 bytes. */
+	ASSERT( p_guid[0] == 0x00 && p_guid[1] == 0x02 && p_guid[2] == 0xc9 );
+
+	if( (port_guid & CL_HTON64( 0x000000ffff0000 )) !=
+		CL_HTON64(0x00000002000000))
+	{
+		return IB_INVALID_GUID;
+	}
+
+	low24 = ((uint32_t)cl_ntoh64( port_guid ) & 0x00FFFFFF);
+
+	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] = (uint8_t)(low24 >> 16);
+	p_mac_addr->addr[4] = (uint8_t)(low24 >> 8);
+	p_mac_addr->addr[5] = (uint8_t)low24;
+	
+	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.
+*
+*	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_guid
 * NAME
 *	ipoib_mac_from_guid
@@ -216,7 +278,13 @@ ipoib_mac_from_guid(
 		if( status == IB_SUCCESS )
 			return IB_SUCCESS;
 	}
-
+	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;
+	}
+	
 	/* Value of zero is reserved. */
 	laa = cl_atomic_inc( &g_ipoib.laa_idx );
 
@@ -256,9 +324,9 @@ ipoib_mac_from_guid(
 *********/
 
 
-/****f* IPOIB/ipoib_guid_from_mac
+/****f* IPOIB/ipoib_sst_guid_from_mac
 * NAME
-*	ipoib_guid_from_mac
+*	ipoib_sst_guid_from_mac
 *
 * DESCRIPTION
 *	Generates a port GUID given an ethernet MAC address.
@@ -266,7 +334,7 @@ ipoib_mac_from_guid(
 * SYNOPSIS
 */
 static inline ib_api_status_t
-ipoib_guid_from_mac(
+ipoib_sst_guid_from_mac(
 	IN		const	mac_addr_t					mac,
 		OUT			net64_t* const				p_port_guid )
 {
@@ -329,6 +397,68 @@ ipoib_guid_from_mac(
 *********/
 
 
+/****f* IPOIB/ipoib_mlx_guid_from_mac
+* NAME
+*	ipoib_mlx_guid_from_mac
+*
+* DESCRIPTION
+*	Generates a port GUID given an ethernet MAC address.
+*
+* SYNOPSIS
+*/
+static inline ib_api_status_t
+ipoib_mlx_guid_from_mac(
+	IN		const	mac_addr_t					mac,
+		OUT			net64_t* const				p_port_guid )
+{
+	uint8_t		*p_guid = (uint8_t*)p_port_guid;
+	uint32_t	low24;
+
+	/* MAC address is in network byte order.  OUI is in lower 3 bytes. */
+	if( mac.addr[0] != 0x00 || 
+		mac.addr[1] != 0x02 || 
+		mac.addr[2] != 0xc9 )
+	{
+		return IB_INVALID_GUID;
+	}
+
+	low24 = mac.addr[3] << 16 || mac.addr[4] << 8 || mac.addr[5];
+
+	/* OUI */
+	p_guid[0] = mac.addr[0];
+	p_guid[1] = mac.addr[1];
+	p_guid[2] = mac.addr[2];
+	p_guid[3] = 0x02;
+	p_guid[4] = 0x00;
+	/* Serial Number */
+	p_guid[5] = (uint8_t)(low24 >> 16);
+	p_guid[6] = (uint8_t)(low24 >> 8);
+	p_guid[7] = (uint8_t)low24;
+	
+	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.
+*
+*	IB_INVALID_GUID
+*		The port GUID provided was not a known GUID format.
+*
+* NOTES
+*	The algorithm to convert portGuid to MAC address is as 
+*
+* SEE ALSO
+*	IPOIB
+*********/
 
 
 #ifdef __cplusplus
-- 
2.41.0