IB/rdmavt, IB/hfi1, IB/qib: Add inlines for mtu division

Add rvt_div_round_up_mtu() and rvt_div_mtu() routines to
do the computation based on the pmtu and the log_pmtu.

Change divides in qib, hfi1 to use the new inlines.

Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index ddc0223..9db260f 100644 (file)
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -2377,8 +2377,7 @@ send_last:
                         * Update the next expected PSN.  We add 1 later
                         * below, so only add the remainder here.
                         */
-                       if (len > pmtu)
-                               qp->r_psn += (len - 1) / pmtu;
+                       qp->r_psn += rvt_div_mtu(qp, len - 1);
                } else {
                        e->rdma_sge.mr = NULL;
                        e->rdma_sge.vaddr = NULL;

diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c
index e23ee6c..031433c 100644 (file)
--- a/drivers/infiniband/hw/qib/qib_rc.c
+++ b/drivers/infiniband/hw/qib/qib_rc.c
@@ -2079,8 +2079,7 @@ send_last:
                         * Update the next expected PSN.  We add 1 later
                         * below, so only add the remainder here.
                         */
-                       if (len > pmtu)
-                               qp->r_psn += (len - 1) / pmtu;
+                       qp->r_psn += rvt_div_mtu(qp, len - 1);
                } else {
                        e->rdma_sge.mr = NULL;
                        e->rdma_sge.vaddr = NULL;

diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
index 04facda..f3dbd15 100644 (file)
--- a/include/rdma/rdmavt_qp.h
+++ b/include/rdma/rdmavt_qp.h
@@ -582,7 +582,29 @@ static inline void rvt_qp_swqe_complete(
        }
 }
 
-extern const int ib_rvt_state_ops[];
+/**
+ * @qp - the qp pair
+ * @len - the length
+ *
+ * Perform a shift based mtu round up divide
+ */
+static inline u32 rvt_div_round_up_mtu(struct rvt_qp *qp, u32 len)
+{
+       return (len + qp->pmtu - 1) >> qp->log_pmtu;
+}
+
+/**
+ * @qp - the qp pair
+ * @len - the length
+ *
+ * Perform a shift based mtu divide
+ */
+static inline u32 rvt_div_mtu(struct rvt_qp *qp, u32 len)
+{
+       return len >> qp->log_pmtu;
+}
+
+extern const int  ib_rvt_state_ops[];
 
 struct rvt_dev_info;
 int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err);