1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_gem_cma_mmap</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="drm-memory-management.html#idp1123226860" title="CMA Helper Functions Reference"><link rel="prev" href="API-drm-gem-cma-dumb-map-offset.html" title="drm_gem_cma_dumb_map_offset"><link rel="next" href="API-drm-gem-cma-describe.html" title="drm_gem_cma_describe"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">drm_gem_cma_mmap</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-gem-cma-dumb-map-offset.html">Prev</a>&#160;</td><th width="60%" align="center">CMA Helper Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-gem-cma-describe.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-gem-cma-mmap"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_gem_cma_mmap &#8212; 
2     memory-map a CMA GEM object
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">drm_gem_cma_mmap </b>(</code></td><td>struct file * <var class="pdparam">filp</var>, </td></tr><tr><td>&#160;</td><td>struct vm_area_struct * <var class="pdparam">vma</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123283724"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>filp</code></em></span></dt><dd><p>
4     file object
5    </p></dd><dt><span class="term"><em class="parameter"><code>vma</code></em></span></dt><dd><p>
6     VMA for the area to be mapped
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123286252"></a><h2>Description</h2><p>
8   This function implements an augmented version of the GEM DRM file mmap
9</p></div><div class="refsect1"><a name="idp1123286908"></a><h2>operation for CMA objects</h2><p>
10   In addition to the usual GEM VMA setup it
11   immediately faults in the entire object instead of using on-demaind
12   faulting. Drivers which employ the CMA helpers should use this function
13   as their -&gt;<code class="function">mmap</code> handler in the DRM device file's file_operations
14   structure.
15</p></div><div class="refsect1"><a name="idp1123288292"></a><h2>Returns</h2><p>
16   0 on success or a negative error code on failure.
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