RDMA/bnxt_re: Simplify obtaining queue entry from hw ring

Restructring the data path and control path queue management code to
simplify the way a queue element is extracted from the hardware ring.

Introduced a new function which will give a pointer to the next ring item
depending upon the current cons/prod index in the hardware queue.

Further, there are hardcoding when size of queue entry is calculated,
replacing it with an inline function. This function would be easier to
expand if need going forward.

The code section to initialize the PSN search areas has also been
restructured and couple of functions has been added there.

Link: https://lore.kernel.org/r/1585851136-2316-4-git-send-email-devesh.sharma@broadcom.com
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
index 23d972da5652..18dd46f46cf4 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
@@ -142,6 +142,16 @@ struct bnxt_re_ucontext {
 	spinlock_t		sh_lock;	/* protect shpg */
 };
 
+static inline u16 bnxt_re_get_swqe_size(void)
+{
+	return sizeof(struct sq_send);
+}
+
+static inline u16 bnxt_re_get_rwqe_size(void)
+{
+	return sizeof(struct rq_wqe);
+}
+
 int bnxt_re_query_device(struct ib_device *ibdev,
 			 struct ib_device_attr *ib_attr,
 			 struct ib_udata *udata);