netxen: cut-through rx changes

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NX3031 supports cut-through operation where ingress packets are
directly dma'ed into host buffers to reduce latency.

This requires larger dma buffers (2kb) and different alignemnt.

The buffer posting logic is changed a bit. The free rx buffers
are maintained in linked list, since the received reference
handles can be out of order. However rx descriptors are still
posted sequentially, indexed by producer.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

...

This commit is contained in:

Dhananjay Phadke 2008-07-21 19:44:08 -07:00 • committed by Jeff Garzik

parent c9fc891f86

commit d9e651bc06

4 changed files with 876 additions and 78 deletions

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38

drivers/net/netxen/netxen_nic.h

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710

drivers/net/netxen/netxen_nic_ctx.c

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191

drivers/net/netxen/netxen_nic_init.c

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15

drivers/net/netxen/netxen_nic_main.c

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