Introduce helper cap_read_multi_sge() to help us check if the port of an IB device support RDMA Read Multiple Scatter-Gather Entries.
Cc: Hal Rosenstock <[email protected]> Cc: Steve Wise <[email protected]> Cc: Tom Talpey <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Doug Ledford <[email protected]> Cc: Ira Weiny <[email protected]> Cc: Sean Hefty <[email protected]> Signed-off-by: Michael Wang <[email protected]> --- include/rdma/ib_verbs.h | 15 +++++++++++++++ net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index dde2aa9..cca0293 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1864,6 +1864,21 @@ static inline int cap_ib_mcast(struct ib_device *device, u8 port_num) return cap_ib_sa(device, port_num); } +/** + * cap_read_multi_sge - Check if the port of device has the capability + * RDMA Read Multiple Scatter-Gather Entries. + * + * @device: Device to be checked + * @port_num: Port number of the device + * + * Return 0 when port of the device don't support + * RDMA Read Multiple Scatter-Gather Entries. + */ +static inline int cap_read_multi_sge(struct ib_device *device, u8 port_num) +{ + return !rdma_protocol_iwarp(device, port_num); +} + int ib_query_gid(struct ib_device *device, u8 port_num, int index, union ib_gid *gid); diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 2cc625d..7711b7a 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -117,7 +117,7 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) { - if (rdma_protocol_iwarp(xprt->sc_cm_id->device, + if (!cap_read_multi_sge(xprt->sc_cm_id->device, xprt->sc_cm_id->port_num)) return 1; else -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
