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====== Michael Decker: Driver Development ======
==== Week C ====
----

=== 13 August ===

This morning I installed an **iSCSI** server on my laptop.  It turned out much simpler than anticipated.  I am running Ubuntu 8.04 (Hardy Heron), and it turns out the iSCSI target kernel module is present by default?  So, a point & click install via Synaptic Package Manager, and modification of ''/etc/ietd.conf'' was all that was needed.

Once working, I tested the **3c59x** driver I've been hacking on recently.  Of course there were network errors present, which I didn't see when using AoE.  A ''scandisk'' run over DOS froze up the system.

I spent a while going through the code and checking suspect areas.  I eventually discovered that the Linux code was freeing the tx buffers, which is a no-no in gPXE.  This code was fixed to issue ''netdev_tx_complete()'' notifications.  

Subsequent testing continued showing errors.  This baffled me for some time until I decided to reboot the laptop.  The next test showed no errors!  Interesting.  Further testing suddenly showed errors again.  I then discovered simply restarting Wireshark would prevent the TCP errors from appearing.  Further experimentation resulted in Wireshark crashing unexpectedly!?  So, while the universe seems broken, my driver is not :)

  * [[http://git.etherboot.org/?p=people/mdeck/gpxe.git;a=commit;h=5002142c055dbe3ab9cf9771dfb2cf83740cc988|[Drivers-3c59x] Fixed tx completion & more. Runs well]]

I submit this driver for testing by anyone else before I trim out the old Linux driver code.

Trace: • soc • features_added • hardwareissues • 2011 • soc • socideas • notes • usermode_explained • notes • doc • win2k8_iscsi_install • start

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