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i2o_msg_post_wait_mem(9) [centos man page]

I2O_MSG_POST_WAIT_ME(9) 				       Message-based devices					   I2O_MSG_POST_WAIT_ME(9)

NAME
i2o_msg_post_wait_mem - Post and wait a message with DMA buffers SYNOPSIS
int i2o_msg_post_wait_mem(struct i2o_controller * c, struct i2o_message * msg, unsigned long timeout, struct i2o_dma * dma); ARGUMENTS
c controller msg message to post timeout time in seconds to wait dma i2o_dma struct of the DMA buffer to free on failure DESCRIPTION
This API allows an OSM to post a message and then be told whether or not the system received a successful reply. If the message times out then the value '-ETIMEDOUT' is returned. This is a special case. In this situation the message may (should) complete at an indefinite time in the future. When it completes it will use the memory buffer attached to the request. If -ETIMEDOUT is returned then the memory buffer must not be freed. Instead the event completion will free them for you. In all other cases the buffer are your problem. Returns 0 on success, negative error code on timeout or positive error code from reply. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 I2O_MSG_POST_WAIT_ME(9)

Check Out this Related Man Page

RDMA_POST_RECV(3)					   Librdmacm Programmer's Manual					 RDMA_POST_RECV(3)

NAME
rdma_post_recv - post a work request to receive an incoming message. SYNOPSIS
#include <rdma/rdma_verbs.h> int rdma_post_recv (struct rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr); ARGUMENTS
id A reference to a communication identifier where the message buffer will be posted. context User-defined context associated with the request. addr The address of the memory buffer to post. length The length of the memory buffer. mr A registered memory region associated with the posted buffer. DESCRIPTION
Posts a work request to the receive queue of the queue pair associated with the rdma_cm_id. The posted buffer will be queued to receive an incoming message sent by the remote peer. RETURN VALUE
Returns 0 on success, or -1 on error. If an error occurs, errno will be set to indicate the failure reason. NOTES
The user is responsible for ensuring that a receive buffer is posted and large enough to contain all sent data before the peer posts the corresponding send message. The message buffer must have been registered before being posted, with the mr parameter referencing the regis- tration. The buffer must remain registered until the receive completes. Messages may be posted to an rdma_cm_id only after a queue pair has been associated with it. A queue pair is bound to an rdma_cm_id after calling rdma_create_ep or rdma_create_qp, if the rdma_cm_id is allocated using rdma_create_id. The user-defined context associated with the receive request will be returned to the user through the work completion wr_id, work request identifier, field. SEE ALSO
rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_create_qp(3), rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_recvv(3), rdma_post_send(3) librdmacm 2010-07-19 RDMA_POST_RECV(3)
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