[PATCH mlx5-next 03/10] IB/core: Add interface to advise_mr for kernel users
From: Leon Romanovsky <leon@kernel.org>
Date: 2020-01-15 12:43:54
Also in:
linux-rdma
Subsystem:
infiniband subsystem, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
From: Moni Shoua <redacted> Allow ULPs to call advise_mr, so they can control ODP regions in the same way as user space applications. Signed-off-by: Moni Shoua <redacted> Signed-off-by: Leon Romanovsky <redacted> --- drivers/infiniband/core/verbs.c | 11 +++++++++++ include/rdma/ib_verbs.h | 3 +++ 2 files changed, 14 insertions(+)
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 23d9911f7365..3ebae3b65c28 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c@@ -2023,6 +2023,17 @@ struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, } EXPORT_SYMBOL(ib_reg_user_mr); +int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice, + u32 flags, struct ib_sge *sg_list, u32 num_sge) +{ + if (!pd->device->ops.advise_mr) + return -EOPNOTSUPP; + + return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge, + NULL); +} +EXPORT_SYMBOL(ib_advise_mr); + int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata) { struct ib_pd *pd = mr->pd;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 1aeb92609279..1f779fad3a1e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h@@ -4172,6 +4172,9 @@ static inline void ib_dma_free_coherent(struct ib_device *dev, struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt_addr, int mr_access_flags); +/* ib_advise_mr - give an advice about an address range in a memory region */ +int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice, + u32 flags, struct ib_sge *sg_list, u32 num_sge); /** * ib_dereg_mr_user - Deregisters a memory region and removes it from the * HCA translation table. --
2.20.1