| Message ID | 20200212073559.684139-1-leon@kernel.org (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | f03d9fadfe13a78ee28fec320d43f7b37574adcb |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
| Series | [rdma-next] RDMA/core: Add weak ordering dma attr to dma mapping | expand |
On Wed, Feb 12, 2020 at 09:35:59AM +0200, Leon Romanovsky wrote: > From: Michael Guralnik <michaelgur@mellanox.com> > > For memory regions registered with IB_ACCESS_RELAXED_ORDERING will be > dma mapped with the DMA_ATTR_WEAK_ORDERING. > > This will allow reads and writes to the mapping to be weakly ordered, > such change can enhance performance on some supporting architectures. > > Signed-off-by: Michael Guralnik <michaelgur@mellanox.com> > Signed-off-by: Leon Romanovsky <leonro@mellanox.com> > --- > drivers/infiniband/core/umem.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) Applied to for-next Thanks, Jason
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 06b6125b5ae1..82455a1392f1 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -197,6 +197,7 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr, unsigned long lock_limit; unsigned long new_pinned; unsigned long cur_base; + unsigned long dma_attr = 0; struct mm_struct *mm; unsigned long npages; int ret; @@ -278,10 +279,12 @@ struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr, sg_mark_end(sg); - umem->nmap = ib_dma_map_sg(device, - umem->sg_head.sgl, - umem->sg_nents, - DMA_BIDIRECTIONAL); + if (access & IB_ACCESS_RELAXED_ORDERING) + dma_attr |= DMA_ATTR_WEAK_ORDERING; + + umem->nmap = + ib_dma_map_sg_attrs(device, umem->sg_head.sgl, umem->sg_nents, + DMA_BIDIRECTIONAL, dma_attr); if (!umem->nmap) { ret = -ENOMEM;