centos man page for scsi_dma_map

SCSI_DMA_MAP(9) 						  SCSI mid layer						   SCSI_DMA_MAP(9)

NAME
       scsi_dma_map - perform DMA mapping against command's sg lists

SYNOPSIS
       int scsi_dma_map(struct scsi_cmnd * cmd);

ARGUMENTS
       cmd
	   scsi command

DESCRIPTION
       Returns the number of sg lists actually used, zero if the sg lists is NULL, or -ENOMEM if the mapping failed.

AUTHORS
       James Bottomley <James.Bottomley@hansenpartnership.com>
	   Author.

       Rob Landley <rob@landley.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   SCSI_DMA_MAP(9)