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 <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Sagi Grimberg <[email protected]>
Cc: Steve Wise <[email protected]>
Cc: Parav Pandit <[email protected]>
Cc: Nicholas Bellinger <[email protected]>
Cc: Laurence Oberman <[email protected]>
Cc: <[email protected]> #v4.7+
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Bart Van Assche 2016-07-21 13:03:30 -07:00 • committed by Doug Ledford
commit 632bc3f650
3 changed files with 17 additions and 8 deletions

View file

@ -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;
};