Revert "RDMA/hns: Reserve one sge in order to avoid local length error"

This patch caused some issues on SEND operation, and it should be reverted
to make the drivers work correctly. There will be a better solution that
has been tested carefully to solve the original problem.

This reverts commit 711195e57d341e58133d92cf8aaab1db24e4768d.

Fixes: 711195e57d34 ("RDMA/hns: Reserve one sge in order to avoid local length error")
Link: https://lore.kernel.org/r/1597829984-20223-1-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index da9888deff8c21c6745910232b0536f1bebf3804..6edcbdcd8f4323debe40b9fb200d74f6a4789060 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -65,8 +65,6 @@
 #define HNS_ROCE_CQE_WCMD_EMPTY_BIT            0x2
 #define HNS_ROCE_MIN_CQE_CNT                   16
 
-#define HNS_ROCE_RESERVED_SGE                  1
-
 #define HNS_ROCE_MAX_IRQ_NUM                   128
 
 #define HNS_ROCE_SGE_IN_WQE                    2

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index d2968594664bbbf95b5217249c420ba595aff599..4cda95ed1fbe280edb620ebc61d45d0b9da50690 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -633,7 +633,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp,
 
                wqe_idx = (hr_qp->rq.head + nreq) & (hr_qp->rq.wqe_cnt - 1);
 
-               if (unlikely(wr->num_sge >= hr_qp->rq.max_gs)) {
+               if (unlikely(wr->num_sge > hr_qp->rq.max_gs)) {
                        ibdev_err(ibdev, "rq:num_sge=%d >= qp->sq.max_gs=%d\n",
                                  wr->num_sge, hr_qp->rq.max_gs);
                        ret = -EINVAL;
@@ -653,7 +653,6 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp,
                if (wr->num_sge < hr_qp->rq.max_gs) {
                        dseg->lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
                        dseg->addr = 0;
-                       dseg->len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
                }
 
                /* rq support inline data */
@@ -787,8 +786,8 @@ static int hns_roce_v2_post_srq_recv(struct ib_srq *ibsrq,
                }
 
                if (wr->num_sge < srq->max_gs) {
-                       dseg[i].len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
-                       dseg[i].lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
+                       dseg[i].len = 0;
+                       dseg[i].lkey = cpu_to_le32(0x100);
                        dseg[i].addr = 0;
                }
 
@@ -5070,7 +5069,7 @@ static int hns_roce_v2_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
 
        attr->srq_limit = limit_wl;
        attr->max_wr = srq->wqe_cnt - 1;
-       attr->max_sge = srq->max_gs - HNS_ROCE_RESERVED_SGE;
+       attr->max_sge = srq->max_gs;
 
 out:
        hns_roce_free_cmd_mailbox(hr_dev, mailbox);

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index 1fb1c583d0f8fbabf7dc3c0781684c50de50ecd9..ac29be43b6bd559a25cbee215d2df34bdacce6ab 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -92,9 +92,7 @@
 #define HNS_ROCE_V2_CQC_TIMER_ENTRY_SZ         PAGE_SIZE
 #define HNS_ROCE_V2_PAGE_SIZE_SUPPORTED                0xFFFFF000
 #define HNS_ROCE_V2_MAX_INNER_MTPT_NUM         2
-#define HNS_ROCE_INVALID_LKEY                  0x0
-#define HNS_ROCE_INVALID_SGE_LENGTH            0x80000000
-
+#define HNS_ROCE_INVALID_LKEY                  0x100
 #define HNS_ROCE_CMQ_TX_TIMEOUT                        30000
 #define HNS_ROCE_V2_UC_RC_SGE_NUM_IN_WQE       2
 #define HNS_ROCE_V2_RSV_QPS                    8

diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index e94ca130ff5eb7fbfdcfc969d6f5a63057b7094e..c063c450c715f482bd7428ef337f8243d700babd 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -386,8 +386,7 @@ static int set_rq_size(struct hns_roce_dev *hr_dev, struct ib_qp_cap *cap,
                return -EINVAL;
        }
 
-       hr_qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge) +
-                                             HNS_ROCE_RESERVED_SGE);
+       hr_qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
 
        if (hr_dev->caps.max_rq_sg <= HNS_ROCE_SGE_IN_WQE)
                hr_qp->rq.wqe_shift = ilog2(hr_dev->caps.max_rq_desc_sz);
@@ -402,7 +401,7 @@ static int set_rq_size(struct hns_roce_dev *hr_dev, struct ib_qp_cap *cap,
                hr_qp->rq_inl_buf.wqe_cnt = 0;
 
        cap->max_recv_wr = cnt;
-       cap->max_recv_sge = hr_qp->rq.max_gs - HNS_ROCE_RESERVED_SGE;
+       cap->max_recv_sge = hr_qp->rq.max_gs;
 
        return 0;
 }

diff --git a/drivers/infiniband/hw/hns/hns_roce_srq.c b/drivers/infiniband/hw/hns/hns_roce_srq.c
index f40a000e94ee7e550fa095f7d4f58baf74b5a1b2..b9e2dbd372b66a973d2cf5b13464d933b72b53ee 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_srq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_srq.c
@@ -297,7 +297,7 @@ int hns_roce_create_srq(struct ib_srq *ib_srq,
        spin_lock_init(&srq->lock);
 
        srq->wqe_cnt = roundup_pow_of_two(init_attr->attr.max_wr + 1);
-       srq->max_gs = init_attr->attr.max_sge + HNS_ROCE_RESERVED_SGE;
+       srq->max_gs = init_attr->attr.max_sge;
 
        if (udata) {
                ret = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));