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authorSean Hefty2011-05-23 19:59:25 -0700
committerRoland Dreier2011-10-13 09:16:19 -0700
commitb42b63cf0dde2af6eec462b2d6cca7d938702a28 (patch)
treeabb1c06c6903bdc816b5a09a25ea3e4b2bda7842 /include/rdma
parent418d51307d102e72e745031adb4f5ba0ddb646e2 (diff)
RDMA/core: Add XRC QPs
XRC ("eXtended reliable connected") is an IB transport that provides better scalability by allowing senders to specify which shared receive queue (SRQ) should be used to receive a message, which essentially allows one transport context (QP connection) to serve multiple destinations (as long as they share an adapter, of course). XRC communication is between an initiator (INI) QP and a target (TGT) QP. Target QPs are associated with SRQs through an XRCD. An XRC TGT QP behaves like a receive-only RD QP. XRC INI QPs behave similarly to RC QPs, except that work requests posted to an XRC INI QP must specify the remote SRQ that is the target of the work request. We define two new QP types for XRC, to distinguish between INI and TGT QPs, and update the core layer to support XRC QPs. This patch is derived from work by Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 516647a22135..c3d7602b5e90 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -579,7 +579,11 @@ enum ib_qp_type {
IB_QPT_UC,
IB_QPT_UD,
IB_QPT_RAW_IPV6,
- IB_QPT_RAW_ETHERTYPE
+ IB_QPT_RAW_ETHERTYPE,
+ /* Save 8 for RAW_PACKET */
+ IB_QPT_XRC_INI = 9,
+ IB_QPT_XRC_TGT,
+ IB_QPT_MAX
};
enum ib_qp_create_flags {
@@ -593,6 +597,7 @@ struct ib_qp_init_attr {
struct ib_cq *send_cq;
struct ib_cq *recv_cq;
struct ib_srq *srq;
+ struct ib_xrcd *xrcd; /* XRC TGT QPs only */
struct ib_qp_cap cap;
enum ib_sig_type sq_sig_type;
enum ib_qp_type qp_type;
@@ -784,6 +789,7 @@ struct ib_send_wr {
u32 rkey;
} fast_reg;
} wr;
+ u32 xrc_remote_srq_num; /* XRC TGT QPs only */
};
struct ib_recv_wr {
@@ -919,6 +925,7 @@ struct ib_qp {
struct ib_cq *send_cq;
struct ib_cq *recv_cq;
struct ib_srq *srq;
+ struct ib_xrcd *xrcd; /* XRC TGT QPs only */
struct ib_uobject *uobject;
void (*event_handler)(struct ib_event *, void *);
void *qp_context;