nfp: add a mutex lock for the vNIC ctrl BAR

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Soon we will try to write to the vNIC mailbox without RTNL held.
Add a new mutex to protect access to specific parts of the PCI
control BAR.

Move the mailbox size checking to the mailbox lock() helper, where
it can be more effective (happen prior to potential overwrite of
other data).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Jakub Kicinski 2019-04-11 20:27:05 -07:00 • committed by David S. Miller

parent e64718282c

commit dd5b2498d8

4 changed files with 87 additions and 23 deletions

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8

drivers/net/ethernet/netronome/nfp/abm/ctrl.c

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23

drivers/net/ethernet/netronome/nfp/nfp_net.h

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72

drivers/net/ethernet/netronome/nfp/nfp_net_common.c

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7

drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h

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