RDMA/ocrdma: Correct queue free count math

Correct queue free count math for SQ, RQ for all hardware type.
Update user-kernel ABI interface.

Signed-off-by: Parav Pandit <parav.pandit@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

4 files changed, 1 insertions, 17 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h
index 85a69c958559..037f5cea85bd 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma.h
@@ -231,7 +231,6 @@ struct ocrdma_qp_hwq_info {
         u32 entry_size;
         u32 max_cnt;
         u32 max_wqe_idx;
-        u32 free_delta;
         u16 dbid;               /* qid, where to ring the doorbell. */
         u32 len;
         dma_addr_t pa;
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_abi.h b/drivers/infiniband/hw/ocrdma/ocrdma_abi.h
index a411a4e3193d..517ab20b727c 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_abi.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_abi.h
@@ -101,8 +101,6 @@ struct ocrdma_create_qp_uresp {
         u32 rsvd1;
         u32 num_wqe_allocated;
         u32 num_rqe_allocated;
-        u32 free_wqe_delta;
-        u32 free_rqe_delta;
         u32 db_sq_offset;
         u32 db_rq_offset;
         u32 db_shift;
@@ -126,8 +124,7 @@ struct ocrdma_create_srq_uresp {
         u32 db_rq_offset;
         u32 db_shift;
 
-        u32 free_rqe_delta;
-        u32 rsvd2;
+        u64 rsvd2;
         u64 rsvd3;
 } __packed;
 
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index 9b204b1ba336..f26314fd5f6e 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -1990,19 +1990,12 @@ static void ocrdma_get_create_qp_rsp(struct ocrdma_create_qp_rsp *rsp,
         max_wqe_allocated = 1 << max_wqe_allocated;
         max_rqe_allocated = 1 << ((u16)rsp->max_wqe_rqe);
 
-        if (qp->dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
-                qp->sq.free_delta = 0;
-                qp->rq.free_delta = 1;
-        } else
-                qp->sq.free_delta = 1;
-
         qp->sq.max_cnt = max_wqe_allocated;
         qp->sq.max_wqe_idx = max_wqe_allocated - 1;
 
         if (!attrs->srq) {
                 qp->rq.max_cnt = max_rqe_allocated;
                 qp->rq.max_wqe_idx = max_rqe_allocated - 1;
-                qp->rq.free_delta = 1;
         }
 }
 
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index e9f74d1b48f6..d16d172b6b6b 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -940,8 +940,6 @@ static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
                 uresp.db_rq_offset = OCRDMA_DB_RQ_OFFSET;
                 uresp.db_shift = 16;
         }
-        uresp.free_wqe_delta = qp->sq.free_delta;
-        uresp.free_rqe_delta = qp->rq.free_delta;
 
         if (qp->dpp_enabled) {
                 uresp.dpp_credit = dpp_credit_lmt;
@@ -1307,8 +1305,6 @@ static int ocrdma_hwq_free_cnt(struct ocrdma_qp_hwq_info *q)
                 free_cnt = (q->max_cnt - q->head) + q->tail;
         else
                 free_cnt = q->tail - q->head;
-        if (q->free_delta)
-                free_cnt -= q->free_delta;
         return free_cnt;
 }
 
@@ -1501,7 +1497,6 @@ static int ocrdma_copy_srq_uresp(struct ocrdma_srq *srq, struct ib_udata *udata)
             (srq->pd->id * srq->dev->nic_info.db_page_size);
         uresp.db_page_size = srq->dev->nic_info.db_page_size;
         uresp.num_rqe_allocated = srq->rq.max_cnt;
-        uresp.free_rqe_delta = 1;
         if (srq->dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ1_OFFSET;
                 uresp.db_shift = 24;