Messages in this thread |  | | Date | Tue, 21 Apr 2015 20:11:25 -0400 | From | "ira.weiny" <> | Subject | Re: [PATCH v5 23/27] IB/Verbs: Use management helper cap_read_multi_sge() |
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On Mon, Apr 20, 2015 at 10:42:07AM +0200, Michael Wang wrote: > > 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 <hal@dev.mellanox.co.il> > Cc: Steve Wise <swise@opengridcomputing.com> > Cc: Tom Talpey <tom@talpey.com> > Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> > Cc: Doug Ledford <dledford@redhat.com> > Cc: Ira Weiny <ira.weiny@intel.com> > Cc: Sean Hefty <sean.hefty@intel.com> > Signed-off-by: Michael Wang <yun.wang@profitbricks.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> --- > include/rdma/ib_verbs.h | 15 +++++++++++++++ > net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 3 ++- > 2 files changed, 17 insertions(+), 1 deletion(-) > > diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h > index d0ae08e..074f66d 100644 > --- a/include/rdma/ib_verbs.h > +++ b/include/rdma/ib_verbs.h > @@ -1878,6 +1878,21 @@ static inline int cap_ipoib(struct ib_device *device, u8 port_num) > return rdma_tech_ib(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_tech_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 a5bed5b..7711b7a 100644 > --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > @@ -117,7 +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_tech_iwarp(xprt->sc_cm_id->device, xprt->sc_cm_id->port_num)) > + if (!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); > -- > 2.1.0
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