diff options
| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-06-10 21:40:05 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-06-11 12:22:27 -0700 |
| commit | e2c7114a12363eef7c3104ce223a0084d1800458 (patch) | |
| tree | d102f6667eb44ca335afd468b0947beef210edab /drivers/net/ethernet/netronome/nfp/ccm.h | |
| parent | nfp: rename nfp_ccm_mbox_alloc() (diff) | |
| download | linux-e2c7114a12363eef7c3104ce223a0084d1800458.tar.xz linux-e2c7114a12363eef7c3104ce223a0084d1800458.zip | |
nfp: add async version of mailbox communication
Some control messages must be sent from atomic context. The mailbox
takes sleeping locks and uses a waitqueue so add a "posted" version
of communication.
Trylock the semaphore and if that's successful kick of the device
communication. The device communication will be completed from
a workqueue, which will also release the semaphore.
If locks are taken queue the message and return. Schedule a
different workqueue to take the semaphore and run the communication.
Note that the there are currently no atomic users which would actually
need the return value, so all replies to posted messages are just
freed.
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>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/ccm.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/ccm.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/ccm.h b/drivers/net/ethernet/netronome/nfp/ccm.h index c905898ab26e..da1b1e20df51 100644 --- a/drivers/net/ethernet/netronome/nfp/ccm.h +++ b/drivers/net/ethernet/netronome/nfp/ccm.h @@ -100,7 +100,7 @@ struct nfp_ccm { u16 tag_alloc_last; struct sk_buff_head replies; - struct wait_queue_head wq; + wait_queue_head_t wq; }; int nfp_ccm_init(struct nfp_ccm *ccm, struct nfp_app *app); @@ -110,6 +110,10 @@ struct sk_buff * nfp_ccm_communicate(struct nfp_ccm *ccm, struct sk_buff *skb, enum nfp_ccm_type type, unsigned int reply_size); +int nfp_ccm_mbox_alloc(struct nfp_net *nn); +void nfp_ccm_mbox_free(struct nfp_net *nn); +int nfp_ccm_mbox_init(struct nfp_net *nn); +void nfp_ccm_mbox_clean(struct nfp_net *nn); bool nfp_ccm_mbox_fits(struct nfp_net *nn, unsigned int size); struct sk_buff * nfp_ccm_mbox_msg_alloc(struct nfp_net *nn, unsigned int req_size, @@ -118,4 +122,6 @@ int nfp_ccm_mbox_communicate(struct nfp_net *nn, struct sk_buff *skb, enum nfp_ccm_type type, unsigned int reply_size, unsigned int max_reply_size); +int nfp_ccm_mbox_post(struct nfp_net *nn, struct sk_buff *skb, + enum nfp_ccm_type type, unsigned int max_reply_size); #endif |