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IBV_CREATE_QP_EX(3)	Libibverbs Programmer's	Manual	   IBV_CREATE_QP_EX(3)

       ibv_create_qp_ex, ibv_destroy_qp	- create or destroy a queue pair (QP)

       #include	<infiniband/verbs.h>

       struct ibv_qp *ibv_create_qp_ex(struct ibv_context *context,
				       struct ibv_qp_init_attr_ex *qp_init_attr);

       int ibv_destroy_qp(struct ibv_qp	*qp);

       ibv_create_qp_ex()  creates  a queue pair (QP) associated with the pro-
       tection	 domain	  pd.	 The   argument	   qp_init_attr_ex    is    an
       ibv_qp_init_attr_ex struct, as defined in <infiniband/verbs.h>.

       struct ibv_qp_init_attr_ex {
	       void		      *qp_context;     /* Associated context of	the QP */
	       struct ibv_cq	      *send_cq;	       /* CQ to	be associated with the Send Queue (SQ) */
	       struct ibv_cq	      *recv_cq;	       /* CQ to	be associated with the Receive Queue (RQ) */
	       struct ibv_srq	      *srq;	       /* SRQ handle if	QP is to be associated with an SRQ, otherwise NULL */
	       struct ibv_qp_cap       cap;	       /* QP capabilities */
	       enum ibv_qp_type	       qp_type;	       /* QP Transport Service Type: IBV_QPT_RC, IBV_QPT_UC, IBV_QPT_UD	or IBV_QPT_RAW_PACKET */
	       int		       sq_sig_all;     /* If set, each Work Request (WR) submitted to the SQ generates a completion entry */
	       uint32_t		       comp_mask; /* Identifies	valid fields */
	       struct ibv_pd	      *pd;	  /* PD	to be associated with the QP */
	       struct ibv_xrcd	      *xrcd;	  /* XRC domain	to be associated with the target QP */
	       enum ibv_qp_create_flags	create_flags;  /* Creation flags for this QP */
	       uint16_t		       max_tso_header; /* Maximum TSO header size */
	       struct ibv_rwq_ind_table	*rwq_ind_tbl;  /* Indirection table to be associated with the QP */
	       struct ibv_rx_hash_conf	rx_hash_conf;  /* RX hash configuration	to be used */

       struct ibv_qp_cap {
	       uint32_t		       max_send_wr;    /* Requested max	number of outstanding WRs in the SQ */
	       uint32_t		       max_recv_wr;    /* Requested max	number of outstanding WRs in the RQ */
	       uint32_t		       max_send_sge;   /* Requested max	number of scatter/gather (s/g) elements	in a WR	in the SQ */
	       uint32_t		       max_recv_sge;   /* Requested max	number of s/g elements in a WR in the SQ */
	       uint32_t		       max_inline_data;/* Requested max	number of data (bytes) that can	be posted inline to the	SQ, otherwise 0	*/
       enum ibv_qp_create_flags	{
	       IBV_QP_CREATE_BLOCK_SELF_MCAST_LB       = 1 << 1, /* Prevent self multicast loopback */
	       IBV_QP_CREATE_SCATTER_FCS	       = 1 << 8, /* FCS	field will be scattered	to host	memory */
	       IBV_QP_CREATE_CVLAN_STRIPPING	       = 1 << 9, /* CVLAN field	will be	stripped from incoming packets */
       struct ibv_rx_hash_conf {
	       uint8_t		      rx_hash_function;	      /* RX hash function, use enum ibv_rx_hash_function_flags */
	       uint8_t		      rx_hash_key_len;	      /* RX hash key length */
	       uint8_t		      *rx_hash_key;	      /* RX hash key data */
	       uint64_t		      rx_hash_fields_mask;    /* RX fields that	should participate in the hashing, use enum ibv_rx_hash_fields */

       The  function  ibv_create_qp_ex()  will update the qp_init_attr_ex->cap
       struct with the actual QP values	of the QP that was created; the	values
       will be greater than or equal to	the values requested.

       ibv_destroy_qp()	destroys the QP	qp.

       ibv_create_qp_ex()  returns a pointer to	the created QP,	or NULL	if the
       request fails.  Check the QP number (qp_num) in the returned QP.

       ibv_destroy_qp()	returns	0 on success, or the value of errno on failure
       (which indicates	the failure reason).

       The  attributes	max_recv_wr  and  max_recv_sge are ignored by ibv_cre-
       ate_qp_ex() if the QP is	to be associated with an SRQ.

       ibv_destroy_qp()	fails if the QP	is attached to a multicast group.

       ibv_alloc_pd(3),	   ibv_modify_qp(3),	 ibv_query_qp(3),     ibv_cre-

       Yishai Hadas <>

libibverbs			  2013-06-26		   IBV_CREATE_QP_EX(3)


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