'\" t
.\"     Title: dma_buf_mmap
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Device drivers infrastructure
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "DMA_BUF_MMAP" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Device drivers infrastructure"
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.SH "NAME"
dma_buf_mmap \- Setup up a userspace mmap with the given vma
.SH "SYNOPSIS"
.HP \w'int\ dma_buf_mmap('u
.BI "int dma_buf_mmap(struct\ dma_buf\ *\ " "dmabuf" ", struct\ vm_area_struct\ *\ " "vma" ", unsigned\ long\ " "pgoff" ");"
.SH "ARGUMENTS"
.PP
\fIdmabuf\fR
.RS 4
[in] buffer that should back the vma
.RE
.PP
\fIvma\fR
.RS 4
[in] vma for the mmap
.RE
.PP
\fIpgoff\fR
.RS 4
[in] offset in pages where this mmap should start within the dma\-buf buffer\&.
.RE
.SH "DESCRIPTION"
.PP
This function adjusts the passed in vma so that it points at the file of the dma_buf operation\&. It also adjusts the starting pgoff and does bounds checking on the size of the vma\&. Then it calls the exporters mmap function to set up the mapping\&.
.PP
Can return negative error values, returns 0 on success\&.
.SH "COPYRIGHT"
.br