sfc: ef100 representor RX top half

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Representor RX uses a NAPI context driven by a 'fake interrupt': when
 the parent PF receives a packet destined for the representor, it adds
 it to an SKB list (efv->rx_list), and schedules NAPI if the 'fake
 interrupt' is primed.  The NAPI poll then pulls packets off this list
 and feeds them to the stack with netif_receive_skb_list().
This scheme allows us to decouple representor RX from the parent PF's
 RX fast-path.
This patch implements the 'top half', which builds an SKB, copies data
 into it from the RX buffer (which can then be released), adds it to
 the queue and fires the 'fake interrupt' if necessary.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Edward Cree 2022-07-28 19:57:45 +01:00 • committed by Jakub Kicinski

parent 69bb5fa73d

commit 9fe00c800e

2 changed files with 56 additions and 0 deletions

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drivers/net/ethernet/sfc/ef100_rep.c

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1

drivers/net/ethernet/sfc/ef100_rep.h

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