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From: bugzilla-daemon@bugs.ecos.sourceware.org
To: unassigned@bugs.ecos.sourceware.org
Subject: [Bug 1002058] New: at91 emac lwIP fix against blocking tcp/ip stack
Date: Mon, 20 Apr 2015 12:09:00 -0000
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X-Bugzilla-Product: eCos
X-Bugzilla-Component: Ethernet
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X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: oli@snr.ch
X-Bugzilla-Status: UNCONFIRMED
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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1002058

            Bug ID: 1002058
           Summary: at91 emac lwIP fix against blocking tcp/ip stack
           Product: eCos
           Version: unknown
            Target: at91sam7xek_256 (Atmel AT91SAM7X-EK board with
                    AT91SAM7X256)
  Architecture/Host ARM
                OS:
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: low
         Component: Ethernet
          Assignee: unassigned@bugs.ecos.sourceware.org
          Reporter: oli@snr.ch
                CC: ecos-bugs@ecos.sourceware.org

Created attachment 2587
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2587&action=edit
emac lwIP at91 fix

There are differnet problems in the lwIP / at91/emac combination.
- the at91 driver caculates the needed bufferspace wrong.
- the at91 driver dont remove every broken packet from the emac buffer.
- the at91 driver blocks on some transmit errors.
- the lwIP/eCOS interface has some polling loops which dont give the control to
other threads.
- there is a strange requirement for the PBUF and INPACKET buffer to be bigger
then the MAILBOX-size.

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