[PATCH v2 rdma-core 1/3] libhns: Add alloc mw support for hip08

[Yixian Liu <liuyixian@xxxxxxxxxx>]

This patch adds memory window (mw) allocation support in
the user space driver.

Signed-off-by: Yixian Liu <liuyixian@xxxxxxxxxx>
---
 providers/hns/hns_roce_u.c       |  1 +
 providers/hns/hns_roce_u.h       |  2 ++
 providers/hns/hns_roce_u_verbs.c | 19 +++++++++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/providers/hns/hns_roce_u.c b/providers/hns/hns_roce_u.c
index 633f6ed..8bf0358 100644
--- a/providers/hns/hns_roce_u.c
+++ b/providers/hns/hns_roce_u.c
@@ -62,6 +62,7 @@ static const struct verbs_match_ent hca_table[] = {
 };
 
 static const struct verbs_context_ops hns_common_ops = {
+	.alloc_mw = hns_roce_u_alloc_mw,
 	.alloc_pd = hns_roce_u_alloc_pd,
 	.cq_event = hns_roce_u_cq_event,
 	.create_cq = hns_roce_u_create_cq,
diff --git a/providers/hns/hns_roce_u.h b/providers/hns/hns_roce_u.h
index 6c56bee..f023b6a 100644
--- a/providers/hns/hns_roce_u.h
+++ b/providers/hns/hns_roce_u.h
@@ -275,6 +275,8 @@ int hns_roce_u_rereg_mr(struct verbs_mr *mr, int flags, struct ibv_pd *pd,
 			void *addr, size_t length, int access);
 int hns_roce_u_dereg_mr(struct verbs_mr *mr);
 
+struct ibv_mw *hns_roce_u_alloc_mw(struct ibv_pd *pd, enum ibv_mw_type type);
+
 struct ibv_cq *hns_roce_u_create_cq(struct ibv_context *context, int cqe,
 				    struct ibv_comp_channel *channel,
 				    int comp_vector);
diff --git a/providers/hns/hns_roce_u_verbs.c b/providers/hns/hns_roce_u_verbs.c
index 14eeb5e..be14430 100644
--- a/providers/hns/hns_roce_u_verbs.c
+++ b/providers/hns/hns_roce_u_verbs.c
@@ -175,6 +175,25 @@ int hns_roce_u_dereg_mr(struct verbs_mr *vmr)
 	return ret;
 }
 
+struct ibv_mw *hns_roce_u_alloc_mw(struct ibv_pd *pd, enum ibv_mw_type type)
+{
+	struct ibv_mw *mw;
+	struct ibv_alloc_mw cmd = {};
+	struct ib_uverbs_alloc_mw_resp resp = {};
+
+	mw = malloc(sizeof(*mw));
+	if (!mw)
+		return NULL;
+
+	if (ibv_cmd_alloc_mw(pd, type, mw, &cmd, sizeof(cmd),
+			     &resp, sizeof(resp))) {
+		free(mw);
+		return NULL;
+	}
+
+	return mw;
+}
+
 static int align_cq_size(int req)
 {
 	int nent;
-- 
2.7.4