Added RoCEE_README.txt

Signed-off-by: Eli Cohen <eli@mellanox.co.il

diff --git a/RoCEE_README.txt b/RoCEE_README.txt
new file mode 100755 (executable)
index 0000000..1aee370
--- /dev/null
+++ b/RoCEE_README.txt
@@ -0,0 +1,80 @@
+===============================================================================
+                       OFED-1.5.1 RoCEE Support README
+                               February 2010
+===============================================================================
+
+Contents:
+=========
+1. Overview
+2. Software Dependencies
+3. User Guidelines
+4. Ported Applications
+5. Firmware Requirements
+6. Known Issues
+
+
+1. Overview
+===========
+RDMA over Converged Enhanced Ethernet (RoCEE) allows InfiniBand (IB) transport
+over Ethernet networks. It encapsulates IB transport and GRH headers in
+Ethernet packets bearing a dedicated ether type.
+While the use of GRH is optional within IB subnets, it is mandatory when using
+RoCEE. Verbs applications written over IB verbs should work seamlessly, but
+they require provisioning of GRH information when creating address vectors. The
+library and driver are modified to provide for mapping from GID to MAC
+addresses required by the hardware.
+
+2. Software Dependencies
+========================
+In order to use RoCEE over Mellanox ConnectX(R) hardware, the mlx4_en driver
+must be loaded. Please refer to MLNX_EN_README.txt for further details.
+
+
+3. User Guidelines
+==================
+Since RoCEE encapsulates InfiniBand traffic in Ethernet frames, the
+corresponding net device must be up and running. In case of Mellanox
+hardware, mlx4_en must be loaded and the corresponding interface configured.
+- Make sure mlx4_en.ko is loaded
+- Make sure an IP address has been configured to this interface
+- Run "ibv_devinfo". There is a new field named "link_layer" which can be
+  either "Ethernet" or "IB". If the value is IB, then you need to use
+  connectx_port_config to change the ConnectX ports designation to eth (see
+  mlx4_release_notes.txt for details)
+- Configure the IP address of the interface so that the link will become
+  active
+- All IB verbs applications which run over IB verbs should work on RoCEE
+  links as long as they use GRH headers (that is, as long as they specify use
+  of GRH in their address vector)
+
+
+4. Ported Applications
+======================
+- ibv_*_pingpong examples have been ported too. The user must specify the GID
+  of the remote peer using the new '-g' option. The GID has the same format as
+  that in /sys/class/infiniband/mlx4_0/ports/1/gids/0
+
+- Note: Care should be taken when using ibv_ud_pingpong. The default message
+  size is 2K, which is likely to exceed the MTU of the RoCEE link. Use 
+  ibv_devinfo to inspect the link MTU and specify an appropriate message size
+
+- All rdma_cm applications should work seamlessly without any change
+
+- libsdp works without any change
+
+- Performance tests have been ported
+
+
+5. Firmware Requirements
+========================
+RoCEE requires ConnectX firmware version 2.7.000 or newer. Some features
+require newer, not yet released firmware versions. For example, loopback
+support is available in firmware version 2.7.700 or later.
+
+
+6. Known Issues
+===============
+- PowerPC and ia64 architectures are not supported. x32 architectures were
+  not tested.
+
+- SRP is not supported.