diff options
| author |   Christoph Hellwig <hch@lst.de> | 2020-11-06 19:19:36 +0100 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2020-11-17 15:22:06 -0400 |
| commit | 42f2611cc1738b201701e717246e11e86bef4e1e (patch) | |
| tree | 1c118c241caeef90f66eb98ff678f21bce564d08 /net/rds/ib_send.c | |
| parent | Merge branch 'for-rc' into rdma.git (diff) | |
| download | linux-dev-42f2611cc1738b201701e717246e11e86bef4e1e.tar.xz linux-dev-42f2611cc1738b201701e717246e11e86bef4e1e.zip | |
rds: stop using dmapool
RDMA ULPs should only perform DMA through the ib_dma_* API instead of
using the hidden dma_device directly. In addition using the dma coherent
API family that dmapool is a part of can be very ineffcient on plaforms
that are not DMA coherent. Switch to use slab allocations and the
ib_dma_* APIs instead.
Link: https://lore.kernel.org/r/20201106181941.1878556-6-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'net/rds/ib_send.c')
| -rw-r--r-- | net/rds/ib_send.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c index dfe778220657..92b4a8689aae 100644 --- a/net/rds/ib_send.c +++ b/net/rds/ib_send.c @@ -638,6 +638,10 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm, send->s_sge[0].length = sizeof(struct rds_header); send->s_sge[0].lkey = ic->i_pd->local_dma_lkey; + ib_dma_sync_single_for_cpu(ic->rds_ibdev->dev, + ic->i_send_hdrs_dma[pos], + sizeof(struct rds_header), + DMA_TO_DEVICE); memcpy(ic->i_send_hdrs[pos], &rm->m_inc.i_hdr, sizeof(struct rds_header)); @@ -688,6 +692,10 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm, adv_credits = 0; rds_ib_stats_inc(s_ib_tx_credit_updates); } + ib_dma_sync_single_for_device(ic->rds_ibdev->dev, + ic->i_send_hdrs_dma[pos], + sizeof(struct rds_header), + DMA_TO_DEVICE); if (prev) prev->s_wr.next = &send->s_wr; |