usb_free_coherent(9) [centos man page]

USB_FREE_COHERENT(9)						   USB Core APIs					      USB_FREE_COHERENT(9)

NAME

       usb_free_coherent - free memory allocated with usb_alloc_coherent

SYNOPSIS

       void usb_free_coherent(struct usb_device * dev, size_t size, void * addr, dma_addr_t dma);

ARGUMENTS

       dev
	   device the buffer was used with

       size
	   requested buffer size

       addr
	   CPU address of buffer

       dma
	   DMA address of buffer

DESCRIPTION

       This reclaims an I/O buffer, letting it be reused. The memory must have been allocated using usb_alloc_coherent, and the parameters must
       match those provided in that allocation request.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						      USB_FREE_COHERENT(9)

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

NAME

       rdma_reg_write - register data buffer(s) for remote RDMA write access.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       struct ibv_mr * rdma_reg_write (struct rdma_cm_id *id, void *addr, size_t length);

ARGUMENTS

       id	   A reference to a communication identifier where the message buffer(s) will be used.

       addr	   The address of the memory buffer(s) to register.

       length	   The total length of the memory to register.

DESCRIPTION

       Registers  a  memory  buffer that will be accessed by a remote RDMA write operation.  Memory buffers registered using rdma_reg_write may be
       targeted in an RDMA write request, allowing the buffer to be specified on the remote side of an	RDMA  connection  as  the  remote_addr	of
       rdma_post_write, or similar call.

RETURN VALUE

       Returns	a  reference  to the registered memory region on success, or NULL on error.  If an error occurs, errno will be set to indicate the
       failure reason.

NOTES

       rdma_reg_write is used to register a data buffer that will be the target of an RDMA write operation on a  queue	pair  associated  with	an
       rdma_cm_id.   The  memory  buffer  is registered with the proteection domain associated with the idenfier.  The start of the data buffer is
       specified through the addr parameter, and the total size of the buffer is given by length.

       All data buffers should be registered before being posted as a work request.  Users  must  deregister  all  registered  memory  by  calling
       rdma_dereg_mr.

SEE ALSO

       rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_reg_msgs(3), rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_write(3)

librdmacm							    2010-07-19							 RDMA_REG_WRITE(3)