ionic: monitor fw status generation

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The top 4 bits of the fw_status in dev_info_regs is reserved
for the status generation.  This generation number is an
arbitrary value defined when firmware starts up.  If the FW
is killed/crashed/stopped and then restarted, it will create
a different generation number.  With this mechanism, the host
driver can detect that the FW has crashed and restarted, and
the driver can then take steps to re-initialize its connection.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Shannon Nelson 2021-07-27 10:43:26 -07:00 • committed by David S. Miller

parent c0b03e8399

commit d2662072c0

3 changed files with 31 additions and 3 deletions

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28

drivers/net/ethernet/pensando/ionic/ionic_dev.c

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1

drivers/net/ethernet/pensando/ionic/ionic_dev.h

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5

drivers/net/ethernet/pensando/ionic/ionic_if.h

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