1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_gem_cma_create</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-mm-insert-node-in-range.html" title="drm_mm_insert_node_in_range"><link rel="next" href="API-drm-gem-cma-free-object.html" title="drm_gem_cma_free_object"></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_create</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-mm-insert-node-in-range.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-free-object.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-gem-cma-create"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_gem_cma_create &#8212; 
2  allocate an object with the given size
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">struct drm_gem_cma_object * <b class="fsfunc">drm_gem_cma_create </b>(</code></td><td>struct drm_device * <var class="pdparam">drm</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">size</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123232948"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>drm</code></em></span></dt><dd><p>
4     DRM device
5    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
6     size of the object to allocate
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123235476"></a><h2>Description</h2><p>
8   This function creates a CMA GEM object and allocates a contiguous chunk of
9   memory as backing store. The backing memory has the writecombine attribute
10   set.
11</p></div><div class="refsect1"><a name="idp1123236228"></a><h2>Returns</h2><p>
12   A struct drm_gem_cma_object * on success or an <code class="function">ERR_PTR</code>-encoded negative
13   error code on failure.
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