IB/core, RDMA RW API: Do not exceed QP SGE send limit
Compute the SGE limit for RDMA READ and WRITE requests in
ib_create_qp(). Use that limit in the RDMA RW API implementation.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Parav Pandit <pandit.parav@gmail.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: <stable@vger.kernel.org> #v4.7+
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7e440d4..e694f02 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1428,6 +1428,10 @@
} ext;
};
+/*
+ * @max_write_sge: Maximum SGE elements per RDMA WRITE request.
+ * @max_read_sge: Maximum SGE elements per RDMA READ request.
+ */
struct ib_qp {
struct ib_device *device;
struct ib_pd *pd;
@@ -1449,6 +1453,8 @@
void (*event_handler)(struct ib_event *, void *);
void *qp_context;
u32 qp_num;
+ u32 max_write_sge;
+ u32 max_read_sge;
enum ib_qp_type qp_type;
};