On 11/2/2014 11:30 AM, Or Gerlitz wrote:
From: Matan Barak <matanb@xxxxxxxxxxxx>
Add memory re-registeration to libmlx4.
Memory re-registeration is a feature that enables one to change
the attributes of a memory region, including PD, translation
(address and length) and access flags.
Signed-off-by: Matan Barak <matanb@xxxxxxxxxxxx>
Signed-off-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
---
src/mlx4.c | 1 +
src/mlx4.h | 2 ++
src/verbs.c | 15 +++++++++++++++
3 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/src/mlx4.c b/src/mlx4.c
index 2999150..115fc9c 100644
--- a/src/mlx4.c
+++ b/src/mlx4.c
@@ -92,6 +92,7 @@ static struct ibv_context_ops mlx4_ctx_ops = {
.alloc_pd = mlx4_alloc_pd,
.dealloc_pd = mlx4_free_pd,
.reg_mr = mlx4_reg_mr,
+ .rereg_mr = mlx4_rereg_mr,
.dereg_mr = mlx4_dereg_mr,
.create_cq = mlx4_create_cq,
.poll_cq = mlx4_poll_cq,
diff --git a/src/mlx4.h b/src/mlx4.h
index d71450f..ccb363a 100644
--- a/src/mlx4.h
+++ b/src/mlx4.h
@@ -363,6 +363,8 @@ int mlx4_close_xrcd(struct ibv_xrcd *xrcd);
struct ibv_mr *mlx4_reg_mr(struct ibv_pd *pd, void *addr,
size_t length, int access);
+int mlx4_rereg_mr(struct ibv_mr *mr, int flags, struct ibv_pd *pd,
+ void *addr, size_t length, uint64_t access);
int mlx4_dereg_mr(struct ibv_mr *mr);
struct ibv_cq *mlx4_create_cq(struct ibv_context *context, int cqe,
diff --git a/src/verbs.c b/src/verbs.c
index 623d576..db97303 100644
--- a/src/verbs.c
+++ b/src/verbs.c
@@ -166,6 +166,21 @@ struct ibv_mr *mlx4_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
return mr;
}
+int mlx4_rereg_mr(struct ibv_mr *mr,
+ int flags,
+ struct ibv_pd *pd, void *addr,
+ size_t length, uint64_t access)
+{
+ struct ibv_rereg_mr cmd;
+ struct ibv_rereg_mr_resp resp;
+
+ return ibv_cmd_rereg_mr(mr, flags, addr, length,
+ (uintptr_t) addr,
+ access, pd,
+ &cmd, sizeof(cmd),
+ &resp, sizeof(resp));
+}
+
int mlx4_dereg_mr(struct ibv_mr *mr)
{
int ret;
This looks fine to me.
Reviewed-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
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