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authorBart Van Assche <bart.vanassche@sandisk.com>2016-07-21 23:03:30 +0300
committerDoug Ledford <dledford@redhat.com>2016-08-02 19:02:41 +0300
commit632bc3f65081dd1e2e5394a9161580a0f78e8839 (patch)
tree45f033bacf41656957984f601d84636985212c7e /include/rdma
parenteaa74ec7329a48a4b724d8de440b3a2cbaabf7c8 (diff)
downloadlinux-632bc3f65081dd1e2e5394a9161580a0f78e8839.tar.xz
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>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 7e440d41487a..e694f02d42e3 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1428,6 +1428,10 @@ struct ib_srq {
} 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 @@ struct ib_qp {
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;
};