[PATCH v2 for-rc 1/5] RDMA/hns: Fix ext_sge num error when post send

Haoyue Xu
2022-10-26T09:51:55Z

The max_gs is the sum of extended sge and standard sge. In function
fill_ext_sge_inl_data, max_gs does not subtract the number of extended
sges, but is directly used to calculate the size of extended sges.

Fixes: 30b707886aeb ("RDMA/hns: Support inline data in extented sge space for RC")

Signed-off-by: Luoyouming <luoyouming@huawei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@hisilicon.com>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 1435fe2ea176..0937db738be7 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -187,20 +187,29 @@ static void set_atomic_seg(const struct ib_send_wr *wr,
hr_reg_write(rc_sq_wqe, RC_SEND_WQE_SGE_NUM, valid_num_sge);
}

+static unsigned int get_std_sge_num(struct hns_roce_qp *qp)
+{
+ if (qp->ibqp.qp_type == IB_QPT_GSI || qp->ibqp.qp_type == IB_QPT_UD)
+ return 0;
+
+ return HNS_ROCE_SGE_IN_WQE;
+}
+
static int fill_ext_sge_inl_data(struct hns_roce_qp *qp,
const struct ib_send_wr *wr,
unsigned int *sge_idx, u32 msg_len)
{
struct ib_device *ibdev = &(to_hr_dev(qp->ibqp.device))->ib_dev;
- unsigned int ext_sge_sz = qp->sq.max_gs * HNS_ROCE_SGE_SIZE;
unsigned int left_len_in_pg;
unsigned int idx = *sge_idx;
+ unsigned int std_sge_num;
unsigned int i = 0;
unsigned int len;
void *addr;
void *dseg;

- if (msg_len > ext_sge_sz) {
+ std_sge_num = get_std_sge_num(qp);
+ if (msg_len > (qp->sq.max_gs - std_sge_num) * HNS_ROCE_SGE_SIZE) {
ibdev_err(ibdev,
"no enough extended sge space for inline data.\n");
return -EINVAL;
--
2.30.0