net: ena: add detection and recovery mechanism for handling missed/misrouted MSI-X

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A mechanism for detection of stuck Rx/Tx rings due to missed or
misrouted interrupts.
Check if there are unhandled completion descriptors before the first
MSI-X interrupt arrived.
The check is per queue and per interrupt vector.
Once such condition is detected, driver and device reset is scheduled.

Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Netanel Belgazal 2017-12-28 21:31:30 +00:00 • committed by David S. Miller

parent acfbf3ca31

commit 8510e1a3d1

5 changed files with 80 additions and 7 deletions

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11

drivers/net/ethernet/amazon/ena/ena_eth_com.c

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2

drivers/net/ethernet/amazon/ena/ena_eth_com.h

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68

drivers/net/ethernet/amazon/ena/ena_netdev.c

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4

drivers/net/ethernet/amazon/ena/ena_netdev.h

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2

drivers/net/ethernet/amazon/ena/ena_regs_defs.h

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