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[Bug 1002058] New: at91 emac lwIP fix against blocking tcp/ip stack
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Mon, 20 Apr 2015 12:09:13 +0000
- Subject: [Bug 1002058] New: at91 emac lwIP fix against blocking tcp/ip stack
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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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