[PATCH for-next] RDMA/hns: Support to set mininum depth of qp to 0

[Weihang Li <liweihang@huawei.com>]

From: Lang Cheng <chenglang@huawei.com>

Minimum depth of qp should be allowed to be set to 0 according to the
firmware configuration. And when qp is changed from reset to reset, the
capability of minimum qp depth was used to identify hardware of hip06,
it should be changed into a more readable form.

Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
---
 drivers/infiniband/hw/hns/hns_roce_qp.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index 2a75355..10c4354 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -382,10 +382,10 @@ static int set_rq_size(struct hns_roce_dev *hr_dev,
 			return -EINVAL;
 		}
 
-		if (hr_dev->caps.min_wqes)
+		if (cap->max_recv_wr)
 			max_cnt = max(cap->max_recv_wr, hr_dev->caps.min_wqes);
 		else
-			max_cnt = cap->max_recv_wr;
+			max_cnt = 0;
 
 		hr_qp->rq.wqe_cnt = roundup_pow_of_two(max_cnt);
 
@@ -652,10 +652,10 @@ static int set_kernel_sq_size(struct hns_roce_dev *hr_dev,
 
 	hr_qp->sq.wqe_shift = ilog2(hr_dev->caps.max_sq_desc_sz);
 
-	if (hr_dev->caps.min_wqes)
+	if (cap->max_send_wr)
 		max_cnt = max(cap->max_send_wr, hr_dev->caps.min_wqes);
 	else
-		max_cnt = cap->max_send_wr;
+		max_cnt = 0;
 
 	hr_qp->sq.wqe_cnt = roundup_pow_of_two(max_cnt);
 	if ((u32)hr_qp->sq.wqe_cnt > hr_dev->caps.max_wqes) {
@@ -1394,11 +1394,10 @@ int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 		goto out;
 
 	if (cur_state == new_state && cur_state == IB_QPS_RESET) {
-		if (hr_dev->caps.min_wqes) {
+		if (hr_dev->hw_rev == HNS_ROCE_HW_VER1) {
 			ret = -EPERM;
 			ibdev_err(&hr_dev->ib_dev,
-				"cur_state=%d new_state=%d\n", cur_state,
-				new_state);
+				  "Unsupport to modify qp from reset to reset\n");
 		} else {
 			ret = 0;
 		}
-- 
2.8.1