Hello Tziporet!
Below is the updated release notes for ehca with following changes for more
clarity:
- Add section "Available backports"
- Add known issue #3
Thanks!
Regards
Nam
Open Fabrics Enterprise Distribution (OFED)
ehca in OFED 1.2 Release Notes
June 2007
Overview
--------
ehca is the low level driver implementation for all IBM GX-based HCAs.
ehca Available Parameters
--------------------------
In order to set ehca parameters, add the following line(s) to
/etc/modprobe.conf:
options ib_ehca <parameter>=<value>
whereby <parameter> is one of the following items:
- debug_level debug level (0: no debug traces (default), 1: with debug
traces)
- nr_ports number of connected ports (default: 2)
- port_act_time time to wait for port activation (default: 30 sec)
- scaling_code enable scaling code (default: 1), 0: disable scaling code
New Features
------------
- Scaling code can now be turned on (default) or off at module load time.
Enabling scaling code helps to distribute processing completions across CPUs.
Fixed Bugs
----------
- Mismatched sync/locking between completion handler and destroy cq
- Reworked irq handler to avoid/reduce missed irq events
- Removed do_mmap() and obsolete prototypes
- Serialized calls to register_mr() (Bugzilla #574)
Available backports
-------------------
- RedHat EL4 up5: 2.6.9-42.ELsmp
- RedHat EL5: 2.6.18-8.ELsmp
- SLES10: 2.6.16.21-0.8-smp
- kernel.org: 2.6.19.x and 2.6.20.x
Known Issues
------------
1. The device driver normally uses both ports. For using just one port connect
the ports as shown in Figure 1 and load the device driver by running
`modprobe ib_ehca nr_ports=1`.
--------- IB Card in p570
|
\ /
+---+
| # |
| # |
| # |
| # | <--- Port 2: NOT CONNECTED
| # |
|---|
| # |
| # |
| # |
| # | <--- Port 1: CONNECTED TO THE INFINIBAND SWITCH
| # |
+---+
*Figure 1:* Connections if only one port is used.
NOTE: In OpenPower 720 and p550 port 1 is at the top, port 2 is at the bottom.
2. Furthermore the port(s) needs to be connected to an active switch port while
loading the ehca device driver.
3. RedHat EL5 2.6.18-8.ELsmp
User space not supported
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