XRC queue pairs: xrc defines two new types of QPs. The
initiator, or send-side, xrc qp behaves similar to a send-
only RC qp. xrc send qp's are managed through the existing
QP functions. The send_wr structure is extended in a back-
wards compatible way to support posting sends on a send xrc
qp, which require specifying the remote xrc srq.
The target, or receive-side, xrc qp behaves differently
than other implemented qp's. A recv xrc qp can be created,
modified, and destroyed like other qp's through the existing
calls. The qp_init_attr structure is extended for xrc qp's.
Because xrc recv qp's are bound to an xrcd, rather than a pd,
it is intended to be used among multiple processes. Any process
with access to an xrcd may allocate and connect an xrc recv qp.
The actual xrc recv qp is allocated and managed by the kernel.
If the owning process explicit destroys the xrc recv qp, it is
destroyed. However, if the xrc recv qp is left open when the
user process exits or closes its device, then the lifetime of
the xrc recv qp is bound with the lifetime of the xrcd.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
__u32 remote_qkey;
__u32 reserved;
} ud;
+ struct {
+ __u64 reserved[3];
+ __u32 reserved2;
+ __u32 remote_srqn;
+ } xrc;
} wr;
};
enum ibv_qp_type {
IBV_QPT_RC = 2,
IBV_QPT_UC,
- IBV_QPT_UD
+ IBV_QPT_UD,
+ IBV_QPT_XRC_SEND = 9,
+ IBV_QPT_XRC_RECV
};
struct ibv_qp_cap {
int sq_sig_all;
};
+enum ibv_qp_init_attr_mask {
+ IBV_QP_INIT_ATTR_XRCD = 1 << 0,
+ IBV_QP_INIT_ATTR_RESERVED = 1 << 1
+};
+
+struct ibv_qp_init_attr_ex {
+ void *qp_context;
+ struct ibv_cq *send_cq;
+ struct ibv_cq *recv_cq;
+ struct ibv_srq *srq;
+ struct ibv_qp_cap cap;
+ enum ibv_qp_type qp_type;
+ int sq_sig_all;
+
+ uint64_t comp_mask;
+ struct ibv_xrcd *xrcd;
+};
+
enum ibv_qp_attr_mask {
IBV_QP_STATE = 1 << 0,
IBV_QP_CUR_STATE = 1 << 1,
uint32_t remote_qpn;
uint32_t remote_qkey;
} ud;
+ struct {
+ uint64_t reserved[3];
+ uint32_t reserved2;
+ uint32_t remote_srqn;
+ };
} wr;
};
uint32_t srq_num;
};
+// set device xrc support
+//XXX TO DO: check mask for all calls
enum ibv_qp_mask {
- IBV_QP_RESERVED = 1 << 0
+ IBV_QP_XRCD = 1 << 0,
+ IBV_QP_RESERVED = 1 << 1
};
struct ibv_qp {