RDMA/hns: Fix incorrect sge nums calculation

The user usually configures the number of sge through the max_send_sge
parameter when creating qp, and configures the maximum size of inline data
that can be sent through max_inline_data. Inline uses sge to fill data to
send. Expect the following:

1) When the sge space cannot hold inline data, the sge space needs to be
   expanded to accommodate all inline data

2) When the sge space is enough to accommodate inline data, the upper
   limit of inline data can be increased so that users can send larger
   inline data

Currently case one is not implemented. When the inline data is larger than
the sge space, an error of insufficient sge space occurs.  This part of
the code needs to be reimplemented according to the expected rules. The
calculation method of sge num is modified to take the maximum value of
max_send_sge and the sge for max_inline_data to solve this problem.

Fixes: 05201e01be93 ("RDMA/hns: Refactor process of setting extended sge")
Fixes: 30b707886aeb ("RDMA/hns: Support inline data in extented sge space for RC")
Link: https://lore.kernel.org/r/20221108133847.2304539-3-xuhaoyue1@hisilicon.com
Signed-off-by: Luoyouming <luoyouming@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/uapi/rdma/hns-abi.h b/include/uapi/rdma/hns-abi.h
index f6fde06db4b4..745790ce3c26 100644
--- a/include/uapi/rdma/hns-abi.h
+++ b/include/uapi/rdma/hns-abi.h
@@ -85,11 +85,26 @@ struct hns_roce_ib_create_qp_resp {
 	__aligned_u64 dwqe_mmap_key;
 };
 
+enum {
+	HNS_ROCE_EXSGE_FLAGS = 1 << 0,
+};
+
+enum {
+	HNS_ROCE_RSP_EXSGE_FLAGS = 1 << 0,
+};
+
 struct hns_roce_ib_alloc_ucontext_resp {
 	__u32	qp_tab_size;
 	__u32	cqe_size;
 	__u32	srq_tab_size;
 	__u32	reserved;
+	__u32	config;
+	__u32	max_inline_data;
+};
+
+struct hns_roce_ib_alloc_ucontext {
+	__u32 config;
+	__u32 reserved;
 };
 
 struct hns_roce_ib_alloc_pd_resp {