1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>gen8_init_perctx_bb</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux GPU Driver Developer's Guide"><link rel="up" href="ch04s03.html#id-1.4.3.5.5" title="Logical Rings, Logical Ring Contexts and Execlists"><link rel="prev" href="API-gen8-init-indirectctx-bb.html" title="gen8_init_indirectctx_bb"><link rel="next" href="API-intel-logical-ring-cleanup.html" title="intel_logical_ring_cleanup"></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">gen8_init_perctx_bb</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-gen8-init-indirectctx-bb.html">Prev</a> </td><th width="60%" align="center">Logical Rings, Logical Ring Contexts and Execlists</th><td width="20%" align="right"> <a accesskey="n" href="API-intel-logical-ring-cleanup.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-gen8-init-perctx-bb"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>gen8_init_perctx_bb — 
2     initialize per ctx batch with WA
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">gen8_init_perctx_bb </b>(</code></td><td>struct intel_engine_cs * <var class="pdparam">ring</var>, </td></tr><tr><td> </td><td>struct i915_wa_ctx_bb * <var class="pdparam">wa_ctx</var>, </td></tr><tr><td> </td><td>uint32_t *const <var class="pdparam">batch</var>, </td></tr><tr><td> </td><td>uint32_t * <var class="pdparam">offset</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.4.3.5.5.28.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ring</code></em></span></dt><dd><p>
4     only applicable for RCS
5    </p></dd><dt><span class="term"><em class="parameter"><code>wa_ctx</code></em></span></dt><dd><p>
6     structure representing wa_ctx
7    </p></dd><dt><span class="term"><em class="parameter"><code>batch</code></em></span></dt><dd><p>
8     page in which WA are loaded
9    </p></dd><dt><span class="term"><em class="parameter"><code>offset</code></em></span></dt><dd><p>
10     This field specifies the start of this batch.
11     This batch is started immediately after indirect_ctx batch. Since we ensure
12     that indirect_ctx ends on a cacheline this batch is aligned automatically.
13    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.4.3.5.5.28.6"></a><h2>offset</h2><p>
14   specifies start of the batch, should be cache-aligned.
15</p></div><div class="refsect1"><a name="id-1.4.3.5.5.28.7"></a><h2>size</h2><p>
16   size of the batch in DWORDS but HW expects in terms of cachelines
17</p></div><div class="refsect1"><a name="id-1.4.3.5.5.28.8"></a><h2>Description</h2><p>
18   The number of DWORDS written are returned using this field.
19   </p><p>
20
21   This batch is terminated with MI_BATCH_BUFFER_END and so we need not add padding
22   to align it with cacheline as padding after MI_BATCH_BUFFER_END is redundant.
23</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-gen8-init-indirectctx-bb.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch04s03.html#id-1.4.3.5.5">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-intel-logical-ring-cleanup.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">gen8_init_indirectctx_bb</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">intel_logical_ring_cleanup</span></td></tr></table></div></body></html>
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