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| author | Ursula Braun <ubraun@linux.vnet.ibm.com> | 2017-07-28 13:56:22 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-29 11:22:58 -0700 |
| commit | 10428dd8354cc1c74ee806df45c2227c1f9d7b0c (patch) | |
| tree | aeba542906415b93991296bbae5ad5f983587bcc /net/smc/smc_core.c | |
| parent | b33982c3a6838d13024ae5a32e1f21897767b04b (diff) | |
| download | linux-10428dd8354cc1c74ee806df45c2227c1f9d7b0c.tar.gz linux-10428dd8354cc1c74ee806df45c2227c1f9d7b0c.tar.bz2 linux-10428dd8354cc1c74ee806df45c2227c1f9d7b0c.zip | |
net/smc: synchronize buffer usage with device
Usage of send buffer "sndbuf" is synced
(a) before filling sndbuf for cpu access
(b) after filling sndbuf for device access
Usage of receive buffer "RMB" is synced
(a) before reading RMB content for cpu access
(b) after reading RMB content for device access
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_core.c')
| -rw-r--r-- | net/smc/smc_core.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 447bd52da0e2..1a16d51e2330 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -615,6 +615,38 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_rmb) return 0; } +void smc_sndbuf_sync_sg_for_cpu(struct smc_connection *conn) +{ + struct smc_link_group *lgr = conn->lgr; + + smc_ib_sync_sg_for_cpu(lgr->lnk[SMC_SINGLE_LINK].smcibdev, + conn->sndbuf_desc, DMA_TO_DEVICE); +} + +void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn) +{ + struct smc_link_group *lgr = conn->lgr; + + smc_ib_sync_sg_for_device(lgr->lnk[SMC_SINGLE_LINK].smcibdev, + conn->sndbuf_desc, DMA_TO_DEVICE); +} + +void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn) +{ + struct smc_link_group *lgr = conn->lgr; + + smc_ib_sync_sg_for_cpu(lgr->lnk[SMC_SINGLE_LINK].smcibdev, + conn->rmb_desc, DMA_FROM_DEVICE); +} + +void smc_rmb_sync_sg_for_device(struct smc_connection *conn) +{ + struct smc_link_group *lgr = conn->lgr; + + smc_ib_sync_sg_for_device(lgr->lnk[SMC_SINGLE_LINK].smcibdev, + conn->rmb_desc, DMA_FROM_DEVICE); +} + /* create the send and receive buffer for an SMC socket; * receive buffers are called RMBs; * (even though the SMC protocol allows more than one RMB-element per RMB, |