diff options
| author | Michael Wang <yun.wang@profitbricks.com> | 2015-05-05 14:50:38 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-05-18 13:35:05 -0400 |
| commit | bc0f1d71536063f8b2df966625e0136bca03b3e6 (patch) | |
| tree | f4c1fe67c88362155b29797a8b3e9d9db32e5730 | |
| parent | a31ad3b0e35f7e340c1ab6668080cff91d48c90a (diff) | |
| download | talos-obmc-linux-bc0f1d71536063f8b2df966625e0136bca03b3e6.tar.gz talos-obmc-linux-bc0f1d71536063f8b2df966625e0136bca03b3e6.zip | |
IB/Verbs: Use management helper rdma_cap_read_multi_sge()
Introduce helper rdma_cap_read_multi_sge() to help us check if the port of an
IB device support RDMA Read Multiple Scatter-Gather Entries.
Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | include/rdma/ib_verbs.h | 16 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 4 |
2 files changed, 18 insertions, 2 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 6bbbc86d39d9..2cf23b130f9f 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1864,6 +1864,22 @@ static inline bool rdma_cap_ib_mcast(struct ib_device *device, u8 port_num) return rdma_cap_ib_sa(device, port_num); } +/** + * rdma_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 false when port of the device don't support + * RDMA Read Multiple Scatter-Gather Entries. + */ +static inline bool rdma_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 2cc625db16aa..86b44164172b 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -117,8 +117,8 @@ 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, - xprt->sc_cm_id->port_num)) + if (!rdma_cap_read_multi_sge(xprt->sc_cm_id->device, + xprt->sc_cm_id->port_num)) return 1; else return min_t(int, sge_count, xprt->sc_max_sge); |
