From: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
Some of the adapters support Relaxed Ordering for the MRs.
Driver queries support for Memory region relax ordering support from
firmware and set relax ordering bit in REGISTER_MR request, if the users
request for the support. Also, this is supported only if the PCIe device
has enabled relaxed ordering attribute.
Reviewed-by: Chandramohan Akula <chandramohan.akula@xxxxxxxxxxxx>
Reviewed-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
Reviewed-by: Vijay Kumar Mandadapu <vijaykumar.mandadapu@xxxxxxxxxxxx>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/ib_verbs.c | 14 ++++++++++++++
drivers/infiniband/hw/bnxt_re/qplib_res.h | 5 +++++
2 files changed, 19 insertions(+)
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 50cf3ec..a081580 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -115,6 +115,14 @@ static enum ib_access_flags __to_ib_access_flags(int qflags)
return iflags;
};
+static void bnxt_re_check_and_set_relaxed_ordering(struct bnxt_re_dev *rdev,
+ struct bnxt_qplib_mrw *qplib_mr)
+{
+ if (_is_relaxed_ordering_supported(rdev->dev_attr.dev_cap_flags2) &&
+ pcie_relaxed_ordering_enabled(rdev->en_dev->pdev))
+ qplib_mr->flags |= CMDQ_REGISTER_MR_FLAGS_ENABLE_RO;
+}
+
static int bnxt_re_build_sgl(struct ib_sge *ib_sg_list,
struct bnxt_qplib_sge *sg_list, int num)
{
@@ -3875,6 +3883,9 @@ struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *ib_pd, int mr_access_flags)
mr->qplib_mr.access_flags = __from_ib_access_flags(mr_access_flags);
mr->qplib_mr.type = CMDQ_ALLOCATE_MRW_MRW_FLAGS_PMR;
+ if (mr_access_flags & IB_ACCESS_RELAXED_ORDERING)
+ bnxt_re_check_and_set_relaxed_ordering(rdev, &mr->qplib_mr);
+
/* Allocate and register 0 as the address */
rc = bnxt_qplib_alloc_mrw(&rdev->qplib_res, &mr->qplib_mr);
if (rc)
@@ -4108,6 +4119,9 @@ static struct ib_mr *__bnxt_re_user_reg_mr(struct ib_pd *ib_pd, u64 length, u64
mr->qplib_mr.va = virt_addr;
mr->qplib_mr.total_size = length;
+ if (mr_access_flags & IB_ACCESS_RELAXED_ORDERING)
+ bnxt_re_check_and_set_relaxed_ordering(rdev, &mr->qplib_mr);
+
umem_pgs = ib_umem_num_dma_blocks(umem, page_size);
rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, umem,
umem_pgs, page_size);
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.h b/drivers/infiniband/hw/bnxt_re/qplib_res.h
index b452b2f..049805a 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.h
@@ -570,4 +570,9 @@ static inline bool _is_alloc_mr_unified(u16 dev_cap_flags)
return dev_cap_flags & CREQ_QUERY_FUNC_RESP_SB_MR_REGISTER_ALLOC;
}
+static inline bool _is_relaxed_ordering_supported(u16 dev_cap_ext_flags2)
+{
+ return dev_cap_ext_flags2 & CREQ_QUERY_FUNC_RESP_SB_MEMORY_REGION_RO_SUPPORTED;
+}
+
#endif /* __BNXT_QPLIB_RES_H__ */
--
2.5.5
