diff options
| author | Yishai Hadas <yishaih@nvidia.com> | 2020-09-30 19:38:27 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-10-01 16:44:05 -0300 |
| commit | 677cf51f71c97bcf98852aa2077d7289bc73e3b3 (patch) | |
| tree | 8f599e1ca9147e4573cd22f278d4aafc9383bacf /drivers/infiniband/hw/mlx5/odp.c | |
| parent | 8bfafde08693cc2e740134c3e32b40254f5d82ae (diff) | |
| download | linux-677cf51f71c97bcf98852aa2077d7289bc73e3b3.tar.bz2 | |
RDMA/mlx5: Extend advice MR to support non faulting mode
Extend advice MR to support non faulting mode, this can improve
performance by increasing the populated page tables in the device.
Link: https://lore.kernel.org/r/20200930163828.1336747-4-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/odp.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/odp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 4743ef78afe0..d01fdec05b89 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -665,6 +665,7 @@ void mlx5_ib_fence_odp_mr(struct mlx5_ib_mr *mr) } #define MLX5_PF_FLAGS_DOWNGRADE BIT(1) +#define MLX5_PF_FLAGS_SNAPSHOT BIT(2) static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, u64 user_va, size_t bcnt, u32 *bytes_mapped, u32 flags) @@ -673,6 +674,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, bool downgrade = flags & MLX5_PF_FLAGS_DOWNGRADE; u64 access_mask; u64 start_idx; + bool fault = !(flags & MLX5_PF_FLAGS_SNAPSHOT); page_shift = odp->page_shift; start_idx = (user_va - ib_umem_start(odp)) >> page_shift; @@ -681,7 +683,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp, if (odp->umem.writable && !downgrade) access_mask |= ODP_WRITE_ALLOWED_BIT; - np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, true); + np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, fault); if (np < 0) return np; @@ -1851,6 +1853,9 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd, if (advice == IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH) pf_flags |= MLX5_PF_FLAGS_DOWNGRADE; + if (advice == IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_NO_FAULT) + pf_flags |= MLX5_PF_FLAGS_SNAPSHOT; + if (flags & IB_UVERBS_ADVISE_MR_FLAG_FLUSH) return mlx5_ib_prefetch_sg_list(pd, advice, pf_flags, sg_list, num_sge); |