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Viktor Reusch
2025-09-12 15:55:45 +02:00
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// vi:set ft=cpp: -*- Mode: C++ -*-</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">/* SPDX-License-Identifier: MIT */</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">/*</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> * (c) 2014 Alexander Warg &lt;warg@os.inf.tu-dresden.de&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> */</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &lt;l4/re/util/debug&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &lt;<a class="code" href="l4_2sys_2types_8h.html">l4/sys/types.h</a>&gt;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;<a class="code" href="err_8h.html">l4/sys/err.h</a>&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &lt;l4/cxx/bitfield&gt;</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;<a class="code" href="exceptions.html">l4/cxx/exceptions</a>&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceL4virtio.html">L4virtio</a> {</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#if defined(__ARM_ARCH) &amp;&amp; __ARM_ARCH == 7</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;dmb ishst&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;dmb ish&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#elif defined(__ARM_ARCH) &amp;&amp; __ARM_ARCH &gt;= 8</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;dmb ishst&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;dmb ishld&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#elif defined(__mips__)</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;sync&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;sync&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#elif defined(__amd64__) || defined(__i386__) || defined(__i686__)</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;sfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;lfence&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="preprocessor">#elif defined(__riscv)</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;fence ow, ow&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;fence ir, ir&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#else</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="preprocessor">#warning Missing proper memory write barrier</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> wmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> rmb() { <span class="keyword">asm</span> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;&quot;</span> : : : <span class="stringliteral">&quot;memory&quot;</span>); }</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="keyword">template</span>&lt; <span class="keyword">typename</span> T &gt;</div>
<div class="foldopen" id="foldopen00047" data-start="{" data-end="};">
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html"> 47</a></span><span class="keyword">class </span>Ptr</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>{</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899ab5abd55e2190163bd25dbc488ef0ea9f"> 51</a></span> <span class="keyword">enum</span> <a class="code hl_enumeration" href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899">Invalid_type</a> { <a class="code hl_enumvalue" href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899ab5abd55e2190163bd25dbc488ef0ea9f">Invalid</a> };</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <a class="code hl_class" href="classL4virtio_1_1Ptr.html">Ptr</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html#acc111cad3e7f248a9a8cc8b50e3cffb2"> 56</a></span> <a class="code hl_function" href="classL4virtio_1_1Ptr.html#acc111cad3e7f248a9a8cc8b50e3cffb2">Ptr</a>(<a class="code hl_enumeration" href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899">Invalid_type</a>) : _p(~0ULL) {}</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html#a66b787e51f106d307562f29e7a7da2f8"> 59</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="classL4virtio_1_1Ptr.html#a66b787e51f106d307562f29e7a7da2f8">Ptr</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a> vm_addr) : _p(vm_addr) {}</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html#a8e39f7c9cd370812ebb4610b096c44b6"> 62</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a> <a class="code hl_function" href="classL4virtio_1_1Ptr.html#a8e39f7c9cd370812ebb4610b096c44b6">get</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _p; }</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Ptr.html#aa919b52f31fda0491610eed4b40f3095"> 65</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classL4virtio_1_1Ptr.html#aa919b52f31fda0491610eed4b40f3095">is_valid</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _p != ~0ULL; }</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <a class="code hl_typedef" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a> _p;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span>};</div>
</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span></div>
<div class="foldopen" id="foldopen00080" data-start="{" data-end="};">
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html"> 80</a></span><span class="keyword">class </span><a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">Virtqueue</a></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span>{</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00086" data-start="{" data-end="};">
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html"> 86</a></span> <span class="keyword">class </span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Desc.html">Desc</a></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> {</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00092" data-start="{" data-end="};">
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html"> 92</a></span> <span class="keyword">struct </span>Flags</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> {</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0"> 94</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">raw</a>; </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> Flags() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#af55d156fb8439e393c2afead37823081"> 98</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#af55d156fb8439e393c2afead37823081">Flags</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> v) : <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">raw</a>(v) {}</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#a7412bbf6d83eccc67857cf7bddaf6897"> 101</a></span> CXX_BITFIELD_MEMBER( 0, 0, <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#a7412bbf6d83eccc67857cf7bddaf6897">next</a>, <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">raw</a>);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#ae8a176bcd662bb1e50f08fe63147372b"> 103</a></span> CXX_BITFIELD_MEMBER( 1, 1, <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#ae8a176bcd662bb1e50f08fe63147372b">write</a>, <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">raw</a>);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afbe72e699f3403f80e62125754c69d14"> 105</a></span> CXX_BITFIELD_MEMBER( 2, 2, <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afbe72e699f3403f80e62125754c69d14">indirect</a>, <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">raw</a>);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> };</div>
</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a8aad49eded68125ad5e94d0688d09828"> 108</a></span> <a class="code hl_class" href="classL4virtio_1_1Ptr.html">Ptr&lt;void&gt;</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a8aad49eded68125ad5e94d0688d09828">addr</a>; </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a55a515e923e62893696c1e6c09ffb62b"> 109</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a55a515e923e62893696c1e6c09ffb62b">len</a>; </div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a565cb9c1def0f16e8e46201e588d4b19"> 110</a></span> <a class="code hl_struct" href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html">Flags</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a565cb9c1def0f16e8e46201e588d4b19">flags</a>; </div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a1cc6e1da64e64f03e33a525501b42c29"> 111</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a1cc6e1da64e64f03e33a525501b42c29">next</a>; </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span></div>
<div class="foldopen" id="foldopen00116" data-start="{" data-end="}">
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a71bbf562153b0bcdb7c38e572c2f85ec"> 116</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a71bbf562153b0bcdb7c38e572c2f85ec">dump</a>(<span class="keywordtype">unsigned</span> idx)<span class="keyword"> const</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> L4Re::Util::Dbg().printf(<span class="stringliteral">&quot;D[%04x]: %08llx (%x) f=%04x n=%04x\n&quot;</span>,</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> idx, <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a8aad49eded68125ad5e94d0688d09828">addr</a>.get(),</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a55a515e923e62893696c1e6c09ffb62b">len</a>, <span class="keyword">static_cast&lt;</span><span class="keywordtype">unsigned</span><span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a565cb9c1def0f16e8e46201e588d4b19">flags</a>.raw),</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">static_cast&lt;</span><span class="keywordtype">unsigned</span><span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a1cc6e1da64e64f03e33a525501b42c29">next</a>));</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> }</div>
</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> };</div>
</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span></div>
<div class="foldopen" id="foldopen00128" data-start="{" data-end="};">
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Avail.html"> 128</a></span> <span class="keyword">class </span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Avail.html">Avail</a></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> {</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00134" data-start="{" data-end="};">
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html"> 134</a></span> <span class="keyword">struct </span>Flags</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> {</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ae90843051fd6660c2984df4faece68eb"> 136</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ae90843051fd6660c2984df4faece68eb">raw</a>; </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> Flags() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ad4a7ff0c58d2c05cf98a928cfe801475"> 140</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ad4a7ff0c58d2c05cf98a928cfe801475">Flags</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> v) : <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ae90843051fd6660c2984df4faece68eb">raw</a>(v) {}</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#a6d8ba20a2475c4e3b965d2994e071774"> 143</a></span> CXX_BITFIELD_MEMBER( 0, 0, <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#a6d8ba20a2475c4e3b965d2994e071774">no_irq</a>, <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ae90843051fd6660c2984df4faece68eb">raw</a>);</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> };</div>
</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Avail.html#abc32f5beb7e9edd5f687902a2dbe173a"> 146</a></span> <a class="code hl_struct" href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html">Flags</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Avail.html#abc32f5beb7e9edd5f687902a2dbe173a">flags</a>; </div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Avail.html#afe77dfe41a9b1bc2faf75e6a6bd24fe0"> 147</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Avail.html#afe77dfe41a9b1bc2faf75e6a6bd24fe0">idx</a>; </div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Avail.html#a6c4a129b4b2be51f490184e307b4fa3b"> 148</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Avail.html#a6c4a129b4b2be51f490184e307b4fa3b">ring</a>[]; </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> };</div>
</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span></div>
<div class="foldopen" id="foldopen00154" data-start="{" data-end="};">
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html"> 154</a></span> <span class="keyword">struct </span>Used_elem</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> {</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> Used_elem() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a8d174938317ffbadbe174a32fd5ff197"> 165</a></span> <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a8d174938317ffbadbe174a32fd5ff197">Used_elem</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <span class="keywordtype">id</span>, <a class="code hl_typedef" href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd">len</a>) : <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a23dd02ce30dfcd61163a1ea7c93a9249">id</a>(<a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a23dd02ce30dfcd61163a1ea7c93a9249">id</a>), <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd">len</a>(<a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd">len</a>) {}</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a23dd02ce30dfcd61163a1ea7c93a9249"> 166</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a23dd02ce30dfcd61163a1ea7c93a9249">id</a>; </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd"> 167</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd">len</a>; </div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> };</div>
</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span></div>
<div class="foldopen" id="foldopen00173" data-start="{" data-end="};">
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Used.html"> 173</a></span> <span class="keyword">class </span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Used.html">Used</a></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> {</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00179" data-start="{" data-end="};">
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html"> 179</a></span> <span class="keyword">struct </span>Flags</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> {</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a7459f27e7384bd27fbe62f2a04220e06"> 181</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a7459f27e7384bd27fbe62f2a04220e06">raw</a>; </div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> Flags() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#aca4a2ebc408cabb091e5c1157c2256ab"> 185</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#aca4a2ebc408cabb091e5c1157c2256ab">Flags</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> v) : <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a7459f27e7384bd27fbe62f2a04220e06">raw</a>(v) {}</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"><a class="line" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a2f25da3fceec3523aad6c832ac1ad4e8"> 188</a></span> CXX_BITFIELD_MEMBER( 0, 0, <a class="code hl_function" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a2f25da3fceec3523aad6c832ac1ad4e8">no_notify</a>, <a class="code hl_variable" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a7459f27e7384bd27fbe62f2a04220e06">raw</a>);</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> };</div>
</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Used.html#aa2b2bf425d1a2136032ba973be5480a6"> 191</a></span> <a class="code hl_struct" href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html">Flags</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Used.html#aa2b2bf425d1a2136032ba973be5480a6">flags</a>; </div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Used.html#a52b30d4e0105cceb7ca712f06723b6c0"> 192</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Used.html#a52b30d4e0105cceb7ca712f06723b6c0">idx</a>; </div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue_1_1Used.html#a03aa556eeea118229a90943a87a77ac1"> 193</a></span> <a class="code hl_struct" href="structL4virtio_1_1Virtqueue_1_1Used__elem.html">Used_elem</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue_1_1Used.html#a03aa556eeea118229a90943a87a77ac1">ring</a>[]; </div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> };</div>
</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="keyword">protected</span>:</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0"> 197</a></span> <a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Desc.html">Desc</a> *<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a> = <span class="keyword">nullptr</span>; </div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec"> 198</a></span> <a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Avail.html">Avail</a> *<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a> = <span class="keyword">nullptr</span>; </div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405"> 199</a></span> <a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Used.html">Used</a> *<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a> = <span class="keyword">nullptr</span>; </div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3"> 202</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">_current_avail</a> = 0;</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a"> 208</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a> = 0;</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50"> 213</a></span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">Virtqueue</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">Virtqueue</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">Virtqueue</a> <span class="keyword">const</span> &amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">~Virtqueue</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> </div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span><span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00224" data-start="{" data-end="}">
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a031d371276beec1cb5cf550be6fac491"> 224</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a031d371276beec1cb5cf550be6fac491">disable</a>()</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> { <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a> = 0; }</div>
</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="keyword">enum</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> {</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> Desc_align = 4, <span class="comment">//&lt; Alignment of the descriptor table.</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> Avail_align = 1, <span class="comment">//&lt; Alignment of the available ring.</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> Used_align = 2, <span class="comment">//&lt; Alignment of the used ring.</span></div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> };</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span></div>
<div class="foldopen" id="foldopen00245" data-start="{" data-end="}">
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a6f8cdc52ebe6322c3023e05e0e055293"> 245</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a6f8cdc52ebe6322c3023e05e0e055293">total_size</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>)</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> {</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="keyword">static_assert</span>(Desc_align &gt;= Avail_align,</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> <span class="stringliteral">&quot;virtqueue alignment assumptions broken&quot;</span>);</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__l4__memory__api.html#gae876a4c6e0f21b2ecbf17863dc7d11e4">l4_round_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a19410c09db5499023cb4b9f11742cd26">desc_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>) + <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a962767a117dad07184f59191d399f9ce">avail_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>), Used_align)</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> + <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7747ac81d7fd21e1e55e43c2e7ead2ea">used_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>);</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> }</div>
</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span></div>
<div class="foldopen" id="foldopen00261" data-start="{" data-end="}">
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a19410c09db5499023cb4b9f11742cd26"> 261</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a19410c09db5499023cb4b9f11742cd26">desc_size</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>)</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> { <span class="keywordflow">return</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> * 16; }</div>
</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span></div>
<div class="foldopen" id="foldopen00269" data-start="{" data-end="}">
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a748641c2fbc97de84af1325718d79c91"> 269</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a748641c2fbc97de84af1325718d79c91">desc_align</a>()</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> { <span class="keywordflow">return</span> Desc_align; }</div>
</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span></div>
<div class="foldopen" id="foldopen00279" data-start="{" data-end="}">
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a962767a117dad07184f59191d399f9ce"> 279</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a962767a117dad07184f59191d399f9ce">avail_size</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>)</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> { <span class="keywordflow">return</span> 2 * <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> + 6; }</div>
</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span></div>
<div class="foldopen" id="foldopen00287" data-start="{" data-end="}">
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a2d23419189e2531f604a5700460794e4"> 287</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a2d23419189e2531f604a5700460794e4">avail_align</a>()</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> { <span class="keywordflow">return</span> Avail_align; }</div>
</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span></div>
<div class="foldopen" id="foldopen00298" data-start="{" data-end="}">
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a7747ac81d7fd21e1e55e43c2e7ead2ea"> 298</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7747ac81d7fd21e1e55e43c2e7ead2ea">used_size</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>)</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> { <span class="keywordflow">return</span> 8 * <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> + 6; }</div>
</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span></div>
<div class="foldopen" id="foldopen00306" data-start="{" data-end="}">
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a6a7f4c453e083ba56a64018f2f37a405"> 306</a></span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a6a7f4c453e083ba56a64018f2f37a405">used_align</a>()</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> { <span class="keywordflow">return</span> Used_align; }</div>
</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span></div>
<div class="foldopen" id="foldopen00314" data-start="{" data-end="}">
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a96dfd139f3a022e9e2328e28716acdc9"> 314</a></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a96dfd139f3a022e9e2328e28716acdc9">total_size</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> <span class="keywordflow">return</span> (<span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>) - <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>))</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> + <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7747ac81d7fd21e1e55e43c2e7ead2ea">used_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>());</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> }</div>
</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span></div>
<div class="foldopen" id="foldopen00323" data-start="{" data-end="}">
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a5a4db3f2c9356da05cd5b472ebc2f0e6"> 323</a></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a5a4db3f2c9356da05cd5b472ebc2f0e6">avail_offset</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span><span class="keyword"> </span>{ <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>) - <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>); }</div>
</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span></div>
<div class="foldopen" id="foldopen00329" data-start="{" data-end="}">
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a80c6d7100b025658ad3c05a844e4391b"> 329</a></span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a80c6d7100b025658ad3c05a844e4391b">used_offset</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span><span class="keyword"> </span>{ <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>) - <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">char</span> *<span class="keyword">&gt;</span>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>); }</div>
</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span></div>
<div class="foldopen" id="foldopen00349" data-start="{" data-end="}">
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a109ea5677dd074df1d2c6a06056c7d82"> 349</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a109ea5677dd074df1d2c6a06056c7d82">setup</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <span class="keywordtype">void</span> *desc, <span class="keywordtype">void</span> *avail, <span class="keywordtype">void</span> *used)</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> {</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> &gt; 0x10000)</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> <span class="keywordflow">throw</span> <a class="code hl_class" href="classL4_1_1Runtime__error.html">L4::Runtime_error</a>(-<a class="code hl_enumvalue" href="group__l4__error__api.html#ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8">L4_EINVAL</a>, <span class="stringliteral">&quot;Queue too large.&quot;</span>);</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> </div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a> = <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> - 1;</div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a> = <span class="keyword">static_cast&lt;</span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Desc.html">Desc</a>*<span class="keyword">&gt;</span>(desc);</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a> = <span class="keyword">static_cast&lt;</span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Avail.html">Avail</a>*<span class="keyword">&gt;</span>(avail);</div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a> = <span class="keyword">static_cast&lt;</span><a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Used.html">Used</a>*<span class="keyword">&gt;</span>(used);</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">_current_avail</a> = 0;</div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> </div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> L4Re::Util::Dbg().printf(<span class="stringliteral">&quot;VQ[%p]: num=%d d:%p a:%p u:%p\n&quot;</span>,</div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> <span class="keyword">this</span>, <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>, <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>, <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>);</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> }</div>
</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span></div>
<div class="foldopen" id="foldopen00378" data-start="{" data-end="}">
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a437c0ed2eb83201cc69c41d011503036"> 378</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a437c0ed2eb83201cc69c41d011503036">setup_simple</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <span class="keywordtype">void</span> *ring)</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> {</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> desc = <span class="keyword">reinterpret_cast&lt;</span><a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a><span class="keyword">&gt;</span>(ring);</div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span> <a class="code hl_typedef" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> avail = <a class="code hl_function" href="group__l4__memory__api.html#gae876a4c6e0f21b2ecbf17863dc7d11e4">l4_round_size</a>(desc + <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a19410c09db5499023cb4b9f11742cd26">desc_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>), Avail_align);</div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span> <span class="keywordtype">void</span> *used = <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">void</span> *<span class="keyword">&gt;</span>(</div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span> <a class="code hl_function" href="group__l4__memory__api.html#gae876a4c6e0f21b2ecbf17863dc7d11e4">l4_round_size</a>(avail + <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a962767a117dad07184f59191d399f9ce">avail_size</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>), Used_align));</div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a109ea5677dd074df1d2c6a06056c7d82">setup</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, ring, <span class="keyword">reinterpret_cast&lt;</span><span class="keywordtype">void</span> *<span class="keyword">&gt;</span>(avail), used);</div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span> }</div>
</div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span></div>
<div class="foldopen" id="foldopen00392" data-start="{" data-end="}">
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a3abd68687a8a7d957e9b765433a313ed"> 392</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a3abd68687a8a7d957e9b765433a313ed">dump</a>(<a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Desc.html">Desc</a> <span class="keyword">const</span> *d)<span class="keyword"> const</span></div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span><span class="keyword"> </span>{ d-&gt;<a class="code hl_function" href="classL4virtio_1_1Virtqueue_1_1Desc.html#a71bbf562153b0bcdb7c38e572c2f85ec">dump</a>(d - <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>); }</div>
</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span></div>
<div class="foldopen" id="foldopen00400" data-start="{" data-end="}">
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#aa242e930433e8705c4ee00afaf58f686"> 400</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#aa242e930433e8705c4ee00afaf58f686">ready</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span><span class="keyword"> </span>{ <span class="keywordflow">return</span> <a class="code hl_define" href="group__l4sys__defines.html#gac76599eba5afa89a12c44176cbfa90cb">L4_LIKELY</a>(<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a> != 0); }</div>
</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span></div>
<div class="foldopen" id="foldopen00404" data-start="{" data-end="}">
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e"> 404</a></span> <span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span><span class="keyword"> </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a> + 1; }</div>
</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span></div>
<div class="foldopen" id="foldopen00414" data-start="{" data-end="}">
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a2aa2efa2e5f6ee73423ec9beab40232a"> 414</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a2aa2efa2e5f6ee73423ec9beab40232a">no_notify_guest</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;flags.no_irq();</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span> }</div>
</div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span></div>
<div class="foldopen" id="foldopen00426" data-start="{" data-end="}">
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#ad478e575bf6023866e8bd4ea6b5b0200"> 426</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#ad478e575bf6023866e8bd4ea6b5b0200">no_notify_host</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>-&gt;flags.no_notify();</div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span> }</div>
</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span></div>
<div class="foldopen" id="foldopen00436" data-start="{" data-end="}">
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a019fa2078eaca937bd0685b79728f986"> 436</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a019fa2078eaca937bd0685b79728f986">no_notify_host</a>(<span class="keywordtype">bool</span> value)</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> {</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>-&gt;flags.no_notify() = value;</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> }</div>
</div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span></div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#abc1894fea1ed246b57027323f611de9d"> 449</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#abc1894fea1ed246b57027323f611de9d">get_avail_idx</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;idx; }</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span></div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Virtqueue.html#a1b548bdf762ff26ca411c20763377986"> 456</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a1b548bdf762ff26ca411c20763377986">get_tail_avail_idx</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">_current_avail</a>; }</div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span> </div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span>};</div>
</div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span> </div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span><span class="keyword">namespace </span>Driver {</div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span></div>
<div class="foldopen" id="foldopen00470" data-start="{" data-end="};">
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html"> 470</a></span><span class="keyword">class </span>Virtqueue : <span class="keyword">public</span> <a class="code hl_class" href="classL4virtio_1_1Virtqueue.html">L4virtio::Virtqueue</a></div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span>{</div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> _next_free;</div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span> </div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span> <span class="keyword">enum</span> End_of_queue</div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"> 478</span> {</div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span> <span class="comment">// Indicates the end of the queue.</span></div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span> Eoq = 0xFFFF</div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span> };</div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span> </div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">Virtqueue</a>() : _next_free(Eoq) {}</div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span></div>
<div class="foldopen" id="foldopen00494" data-start="{" data-end="}">
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#ac31099e5abf48745f518aed17b1dee54"> 494</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#ac31099e5abf48745f518aed17b1dee54">initialize_rings</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>)</div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span> {</div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>-&gt;idx = 0;</div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;idx = 0;</div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span> </div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span> <span class="comment">// setup the freelist</span></div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span> <span class="keywordflow">for</span> (<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> d = 0; d &lt; <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> - 1; ++d)</div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>[d].next = d + 1;</div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>[<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a> - 1].next = Eoq;</div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span> _next_free = 0;</div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span> }</div>
</div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span></div>
<div class="foldopen" id="foldopen00522" data-start="{" data-end="}">
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a8b7ef703e8e55d889419f43dc28dd40e"> 522</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a8b7ef703e8e55d889419f43dc28dd40e">init_queue</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <span class="keywordtype">void</span> *<a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a9ebf7e4518d01a4dc17c5ee6c0e3025b">desc</a>, <span class="keywordtype">void</span> *avail, <span class="keywordtype">void</span> *used)</div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span> {</div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a109ea5677dd074df1d2c6a06056c7d82">setup</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a9ebf7e4518d01a4dc17c5ee6c0e3025b">desc</a>, avail, used);</div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno"> 525</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#ac31099e5abf48745f518aed17b1dee54">initialize_rings</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>);</div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno"> 526</span> }</div>
</div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno"> 527</span></div>
<div class="foldopen" id="foldopen00537" data-start="{" data-end="}">
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a285bae271e6acfe9c5bfa3df388c6b17"> 537</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a285bae271e6acfe9c5bfa3df388c6b17">init_queue</a>(<span class="keywordtype">unsigned</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, <span class="keywordtype">void</span> *base)</div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span> {</div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno"> 539</span> <a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#a437c0ed2eb83201cc69c41d011503036">setup_simple</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>, base);</div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno"> 540</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#ac31099e5abf48745f518aed17b1dee54">initialize_rings</a>(<a class="code hl_function" href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">num</a>);</div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno"> 541</span> }</div>
</div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno"> 542</span> </div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno"> 543</span></div>
<div class="foldopen" id="foldopen00558" data-start="{" data-end="}">
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a60e0cff278a11e1aeb749c17e809e093"> 558</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a60e0cff278a11e1aeb749c17e809e093">alloc_descriptor</a>()</div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span> {</div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno"> 560</span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> idx = _next_free;</div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno"> 561</span> <span class="keywordflow">if</span> (idx == Eoq)</div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno"> 562</span> <span class="keywordflow">return</span> Eoq;</div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span> </div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"> 564</span> _next_free = <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>[idx].next;</div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span> </div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span> <span class="keywordflow">return</span> idx;</div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span> }</div>
</div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span></div>
<div class="foldopen" id="foldopen00574" data-start="{" data-end="}">
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a20a030dd769eddf44b6cb0bb07b84ee8"> 574</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a20a030dd769eddf44b6cb0bb07b84ee8">enqueue_descriptor</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> descno)</div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span> {</div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span> <span class="keywordflow">if</span> (descno &gt; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a>)</div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span> <span class="keywordflow">throw</span> <a class="code hl_class" href="classL4_1_1Bounds__error.html">L4::Bounds_error</a>();</div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span> </div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;ring[<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;idx &amp; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a>] = descno; <span class="comment">// _avail-&gt;idx expected to wrap</span></div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"> 580</span> wmb();</div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span> ++<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">_avail</a>-&gt;idx;</div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span> }</div>
</div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span></div>
<div class="foldopen" id="foldopen00590" data-start="{" data-end="}">
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a9ebf7e4518d01a4dc17c5ee6c0e3025b"> 590</a></span> <a class="code hl_class" href="classL4virtio_1_1Virtqueue_1_1Desc.html">Desc</a> &amp;<a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a9ebf7e4518d01a4dc17c5ee6c0e3025b">desc</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> descno)</div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno"> 591</span> {</div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno"> 592</span> <span class="keywordflow">if</span> (descno &gt; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a>)</div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno"> 593</span> <span class="keywordflow">throw</span> <a class="code hl_class" href="classL4_1_1Bounds__error.html">L4::Bounds_error</a>();</div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span> </div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>[descno];</div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"> 596</span> }</div>
</div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span></div>
<div class="foldopen" id="foldopen00609" data-start="{" data-end="}">
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a6d320be956d592d0a064fb89c5a69ba5"> 609</a></span> <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a6d320be956d592d0a064fb89c5a69ba5">find_next_used</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a> *len = <span class="keyword">nullptr</span>)</div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno"> 610</span> {</div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno"> 611</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">_current_avail</a> == <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>-&gt;idx)</div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno"> 612</span> <span class="keywordflow">return</span> Eoq;</div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno"> 613</span> </div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno"> 614</span> <span class="keyword">auto</span> elem = <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">_used</a>-&gt;ring[<a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">_current_avail</a>++ &amp; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a>];</div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno"> 615</span> </div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno"> 616</span> <span class="keywordflow">if</span> (len)</div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno"> 617</span> *len = elem.len;</div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span> </div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span> <span class="keywordflow">return</span> elem.id;</div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span> }</div>
</div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span></div>
<div class="foldopen" id="foldopen00631" data-start="{" data-end="}">
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno"><a class="line" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a0e419c92208996ea9e1d80db3a183d02"> 631</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="classL4virtio_1_1Driver_1_1Virtqueue.html#a0e419c92208996ea9e1d80db3a183d02">free_descriptor</a>(<a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> head, <a class="code hl_typedef" href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a> tail)</div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno"> 632</span> {</div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno"> 633</span> <span class="keywordflow">if</span> (head &gt; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a> || tail &gt; <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">_idx_mask</a>)</div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"> 634</span> <span class="keywordflow">throw</span> <a class="code hl_class" href="classL4_1_1Bounds__error.html">L4::Bounds_error</a>();</div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno"> 635</span> </div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno"> 636</span> <a class="code hl_variable" href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">_desc</a>[tail].next = _next_free;</div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno"> 637</span> _next_free = head;</div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno"> 638</span> }</div>
</div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno"> 639</span>};</div>
</div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno"> 640</span> </div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno"> 641</span>}</div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno"> 642</span>} <span class="comment">// namespace L4virtio</span></div>
<div class="ttc" id="aclassL4_1_1Bounds__error_html"><div class="ttname"><a href="classL4_1_1Bounds__error.html">L4::Bounds_error</a></div><div class="ttdoc">Access out of bounds.</div><div class="ttdef"><b>Definition</b> <a href="exceptions_source.html#l00278">exceptions:279</a></div></div>
<div class="ttc" id="aclassL4_1_1Runtime__error_html"><div class="ttname"><a href="classL4_1_1Runtime__error.html">L4::Runtime_error</a></div><div class="ttdoc">Exception for an abstract runtime error.</div><div class="ttdef"><b>Definition</b> <a href="exceptions_source.html#l00128">exceptions:129</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a0e419c92208996ea9e1d80db3a183d02"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a0e419c92208996ea9e1d80db3a183d02">L4virtio::Driver::Virtqueue::free_descriptor</a></div><div class="ttdeci">void free_descriptor(l4_uint16_t head, l4_uint16_t tail)</div><div class="ttdoc">Free a chained list of descriptors in the descriptor queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00631">virtqueue:631</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a20a030dd769eddf44b6cb0bb07b84ee8"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a20a030dd769eddf44b6cb0bb07b84ee8">L4virtio::Driver::Virtqueue::enqueue_descriptor</a></div><div class="ttdeci">void enqueue_descriptor(l4_uint16_t descno)</div><div class="ttdoc">Enqueue a descriptor in the available ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00574">virtqueue:574</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a285bae271e6acfe9c5bfa3df388c6b17"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a285bae271e6acfe9c5bfa3df388c6b17">L4virtio::Driver::Virtqueue::init_queue</a></div><div class="ttdeci">void init_queue(unsigned num, void *base)</div><div class="ttdoc">Initialize this virtqueue.</div><div class="ttdef"><b>Definition</b> <a href="#l00537">virtqueue:537</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a60e0cff278a11e1aeb749c17e809e093"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a60e0cff278a11e1aeb749c17e809e093">L4virtio::Driver::Virtqueue::alloc_descriptor</a></div><div class="ttdeci">l4_uint16_t alloc_descriptor()</div><div class="ttdoc">Allocate and return an unused descriptor from the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00558">virtqueue:558</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a6d320be956d592d0a064fb89c5a69ba5"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a6d320be956d592d0a064fb89c5a69ba5">L4virtio::Driver::Virtqueue::find_next_used</a></div><div class="ttdeci">l4_uint16_t find_next_used(l4_uint32_t *len=nullptr)</div><div class="ttdoc">Return the next finished block.</div><div class="ttdef"><b>Definition</b> <a href="#l00609">virtqueue:609</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a8b7ef703e8e55d889419f43dc28dd40e"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a8b7ef703e8e55d889419f43dc28dd40e">L4virtio::Driver::Virtqueue::init_queue</a></div><div class="ttdeci">void init_queue(unsigned num, void *desc, void *avail, void *used)</div><div class="ttdoc">Initialize this virtqueue.</div><div class="ttdef"><b>Definition</b> <a href="#l00522">virtqueue:522</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_a9ebf7e4518d01a4dc17c5ee6c0e3025b"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#a9ebf7e4518d01a4dc17c5ee6c0e3025b">L4virtio::Driver::Virtqueue::desc</a></div><div class="ttdeci">Desc &amp; desc(l4_uint16_t descno)</div><div class="ttdoc">Return a reference to a descriptor in the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00590">virtqueue:590</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Driver_1_1Virtqueue_html_ac31099e5abf48745f518aed17b1dee54"><div class="ttname"><a href="classL4virtio_1_1Driver_1_1Virtqueue.html#ac31099e5abf48745f518aed17b1dee54">L4virtio::Driver::Virtqueue::initialize_rings</a></div><div class="ttdeci">void initialize_rings(unsigned num)</div><div class="ttdoc">Initialize the descriptor table and the index structures of this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00494">virtqueue:494</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html"><div class="ttname"><a href="classL4virtio_1_1Ptr.html">L4virtio::Ptr</a></div><div class="ttdoc">Pointer used in virtio descriptors.</div><div class="ttdef"><b>Definition</b> <a href="#l00047">virtqueue:48</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_a66b787e51f106d307562f29e7a7da2f8"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#a66b787e51f106d307562f29e7a7da2f8">L4virtio::Ptr::Ptr</a></div><div class="ttdeci">Ptr(l4_uint64_t vm_addr)</div><div class="ttdoc">Make a Ptr from a raw 64bit address.</div><div class="ttdef"><b>Definition</b> <a href="#l00059">virtqueue:59</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_a8e39f7c9cd370812ebb4610b096c44b6"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#a8e39f7c9cd370812ebb4610b096c44b6">L4virtio::Ptr::get</a></div><div class="ttdeci">l4_uint64_t get() const</div><div class="ttdef"><b>Definition</b> <a href="#l00062">virtqueue:62</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_aa67c3dbb485b777efcd874b9a78e9899"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899">L4virtio::Ptr::Invalid_type</a></div><div class="ttdeci">Invalid_type</div><div class="ttdoc">Type for making an invalid (NULL) Ptr.</div><div class="ttdef"><b>Definition</b> <a href="#l00051">virtqueue:51</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_aa67c3dbb485b777efcd874b9a78e9899ab5abd55e2190163bd25dbc488ef0ea9f"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#aa67c3dbb485b777efcd874b9a78e9899ab5abd55e2190163bd25dbc488ef0ea9f">L4virtio::Ptr::Invalid</a></div><div class="ttdeci">@ Invalid</div><div class="ttdoc">Use to set a Ptr to invalid (NULL).</div><div class="ttdef"><b>Definition</b> <a href="#l00051">virtqueue:51</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_aa919b52f31fda0491610eed4b40f3095"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#aa919b52f31fda0491610eed4b40f3095">L4virtio::Ptr::is_valid</a></div><div class="ttdeci">bool is_valid() const</div><div class="ttdef"><b>Definition</b> <a href="#l00065">virtqueue:65</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Ptr_html_acc111cad3e7f248a9a8cc8b50e3cffb2"><div class="ttname"><a href="classL4virtio_1_1Ptr.html#acc111cad3e7f248a9a8cc8b50e3cffb2">L4virtio::Ptr::Ptr</a></div><div class="ttdeci">Ptr(Invalid_type)</div><div class="ttdoc">Make and invalid Ptr.</div><div class="ttdef"><b>Definition</b> <a href="#l00056">virtqueue:56</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Avail_html"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Avail.html">L4virtio::Virtqueue::Avail</a></div><div class="ttdoc">Type of available ring, this is read-only for the host.</div><div class="ttdef"><b>Definition</b> <a href="#l00128">virtqueue:129</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Avail_html_a6c4a129b4b2be51f490184e307b4fa3b"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Avail.html#a6c4a129b4b2be51f490184e307b4fa3b">L4virtio::Virtqueue::Avail::ring</a></div><div class="ttdeci">l4_uint16_t ring[]</div><div class="ttdoc">array of available descriptor indexes.</div><div class="ttdef"><b>Definition</b> <a href="#l00148">virtqueue:148</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Avail_html_abc32f5beb7e9edd5f687902a2dbe173a"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Avail.html#abc32f5beb7e9edd5f687902a2dbe173a">L4virtio::Virtqueue::Avail::flags</a></div><div class="ttdeci">Flags flags</div><div class="ttdoc">flags of available ring</div><div class="ttdef"><b>Definition</b> <a href="#l00146">virtqueue:146</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Avail_html_afe77dfe41a9b1bc2faf75e6a6bd24fe0"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Avail.html#afe77dfe41a9b1bc2faf75e6a6bd24fe0">L4virtio::Virtqueue::Avail::idx</a></div><div class="ttdeci">l4_uint16_t idx</div><div class="ttdoc">available index written by guest</div><div class="ttdef"><b>Definition</b> <a href="#l00147">virtqueue:147</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html">L4virtio::Virtqueue::Desc</a></div><div class="ttdoc">Descriptor in the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00086">virtqueue:87</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html_a1cc6e1da64e64f03e33a525501b42c29"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html#a1cc6e1da64e64f03e33a525501b42c29">L4virtio::Virtqueue::Desc::next</a></div><div class="ttdeci">l4_uint16_t next</div><div class="ttdoc">Index of the next chained descriptor.</div><div class="ttdef"><b>Definition</b> <a href="#l00111">virtqueue:111</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html_a55a515e923e62893696c1e6c09ffb62b"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html#a55a515e923e62893696c1e6c09ffb62b">L4virtio::Virtqueue::Desc::len</a></div><div class="ttdeci">l4_uint32_t len</div><div class="ttdoc">Length of described buffer.</div><div class="ttdef"><b>Definition</b> <a href="#l00109">virtqueue:109</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html_a565cb9c1def0f16e8e46201e588d4b19"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html#a565cb9c1def0f16e8e46201e588d4b19">L4virtio::Virtqueue::Desc::flags</a></div><div class="ttdeci">Flags flags</div><div class="ttdoc">Descriptor flags.</div><div class="ttdef"><b>Definition</b> <a href="#l00110">virtqueue:110</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html_a71bbf562153b0bcdb7c38e572c2f85ec"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html#a71bbf562153b0bcdb7c38e572c2f85ec">L4virtio::Virtqueue::Desc::dump</a></div><div class="ttdeci">void dump(unsigned idx) const</div><div class="ttdoc">Dump a single descriptor.</div><div class="ttdef"><b>Definition</b> <a href="#l00116">virtqueue:116</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Desc_html_a8aad49eded68125ad5e94d0688d09828"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Desc.html#a8aad49eded68125ad5e94d0688d09828">L4virtio::Virtqueue::Desc::addr</a></div><div class="ttdeci">Ptr&lt; void &gt; addr</div><div class="ttdoc">Address stored in descriptor.</div><div class="ttdef"><b>Definition</b> <a href="#l00108">virtqueue:108</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Used_html"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Used.html">L4virtio::Virtqueue::Used</a></div><div class="ttdoc">Used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00173">virtqueue:174</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Used_html_a03aa556eeea118229a90943a87a77ac1"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Used.html#a03aa556eeea118229a90943a87a77ac1">L4virtio::Virtqueue::Used::ring</a></div><div class="ttdeci">Used_elem ring[]</div><div class="ttdoc">array of used descriptors.</div><div class="ttdef"><b>Definition</b> <a href="#l00193">virtqueue:193</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Used_html_a52b30d4e0105cceb7ca712f06723b6c0"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Used.html#a52b30d4e0105cceb7ca712f06723b6c0">L4virtio::Virtqueue::Used::idx</a></div><div class="ttdeci">l4_uint16_t idx</div><div class="ttdoc">index of the last entry in the ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00192">virtqueue:192</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_1_1Used_html_aa2b2bf425d1a2136032ba973be5480a6"><div class="ttname"><a href="classL4virtio_1_1Virtqueue_1_1Used.html#aa2b2bf425d1a2136032ba973be5480a6">L4virtio::Virtqueue::Used::flags</a></div><div class="ttdeci">Flags flags</div><div class="ttdoc">flags of the used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00191">virtqueue:191</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html">L4virtio::Virtqueue</a></div><div class="ttdoc">Low-level Virtqueue.</div><div class="ttdef"><b>Definition</b> <a href="#l00080">virtqueue:81</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a019fa2078eaca937bd0685b79728f986"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a019fa2078eaca937bd0685b79728f986">L4virtio::Virtqueue::no_notify_host</a></div><div class="ttdeci">void no_notify_host(bool value)</div><div class="ttdoc">Set the no-notify flag for this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00436">virtqueue:436</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a031d371276beec1cb5cf550be6fac491"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a031d371276beec1cb5cf550be6fac491">L4virtio::Virtqueue::disable</a></div><div class="ttdeci">void disable()</div><div class="ttdoc">Completely disable the queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00224">virtqueue:224</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a109ea5677dd074df1d2c6a06056c7d82"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a109ea5677dd074df1d2c6a06056c7d82">L4virtio::Virtqueue::setup</a></div><div class="ttdeci">void setup(unsigned num, void *desc, void *avail, void *used)</div><div class="ttdoc">Enable this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00349">virtqueue:349</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a19410c09db5499023cb4b9f11742cd26"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a19410c09db5499023cb4b9f11742cd26">L4virtio::Virtqueue::desc_size</a></div><div class="ttdeci">static unsigned long desc_size(unsigned num)</div><div class="ttdoc">Calculate the size of the descriptor table for num entries.</div><div class="ttdef"><b>Definition</b> <a href="#l00261">virtqueue:261</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a1b548bdf762ff26ca411c20763377986"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a1b548bdf762ff26ca411c20763377986">L4virtio::Virtqueue::get_tail_avail_idx</a></div><div class="ttdeci">l4_uint16_t get_tail_avail_idx() const</div><div class="ttdoc">Get tail-available index stored in local state (for debugging).</div><div class="ttdef"><b>Definition</b> <a href="#l00456">virtqueue:456</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a287fe9fe8bef92049b4f0163ed39c405"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a287fe9fe8bef92049b4f0163ed39c405">L4virtio::Virtqueue::_used</a></div><div class="ttdeci">Used * _used</div><div class="ttdoc">pointer to used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00199">virtqueue:199</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a2aa2efa2e5f6ee73423ec9beab40232a"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a2aa2efa2e5f6ee73423ec9beab40232a">L4virtio::Virtqueue::no_notify_guest</a></div><div class="ttdeci">bool no_notify_guest() const</div><div class="ttdoc">Get the no IRQ flag of this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00414">virtqueue:414</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a2d23419189e2531f604a5700460794e4"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a2d23419189e2531f604a5700460794e4">L4virtio::Virtqueue::avail_align</a></div><div class="ttdeci">static unsigned long avail_align()</div><div class="ttdoc">Get the alignment in zero LSBs needed for the available ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00287">virtqueue:287</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a3abd68687a8a7d957e9b765433a313ed"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a3abd68687a8a7d957e9b765433a313ed">L4virtio::Virtqueue::dump</a></div><div class="ttdeci">void dump(Desc const *d) const</div><div class="ttdoc">Dump descriptors for this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00392">virtqueue:392</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a437c0ed2eb83201cc69c41d011503036"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a437c0ed2eb83201cc69c41d011503036">L4virtio::Virtqueue::setup_simple</a></div><div class="ttdeci">void setup_simple(unsigned num, void *ring)</div><div class="ttdoc">Enable this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00378">virtqueue:378</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a5a4db3f2c9356da05cd5b472ebc2f0e6"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a5a4db3f2c9356da05cd5b472ebc2f0e6">L4virtio::Virtqueue::avail_offset</a></div><div class="ttdeci">unsigned long avail_offset() const</div><div class="ttdoc">Get the offset of the available ring from the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00323">virtqueue:323</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a6a7f4c453e083ba56a64018f2f37a405"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a6a7f4c453e083ba56a64018f2f37a405">L4virtio::Virtqueue::used_align</a></div><div class="ttdeci">static unsigned long used_align()</div><div class="ttdoc">Get the alignment in zero LSBs needed for the used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00306">virtqueue:306</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a6f8cdc52ebe6322c3023e05e0e055293"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a6f8cdc52ebe6322c3023e05e0e055293">L4virtio::Virtqueue::total_size</a></div><div class="ttdeci">static unsigned long total_size(unsigned num)</div><div class="ttdoc">Calculate the total size for a virtqueue of the given dimensions.</div><div class="ttdef"><b>Definition</b> <a href="#l00245">virtqueue:245</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a748641c2fbc97de84af1325718d79c91"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a748641c2fbc97de84af1325718d79c91">L4virtio::Virtqueue::desc_align</a></div><div class="ttdeci">static unsigned long desc_align()</div><div class="ttdoc">Get the alignment in zero LSBs needed for the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00269">virtqueue:269</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a7747ac81d7fd21e1e55e43c2e7ead2ea"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a7747ac81d7fd21e1e55e43c2e7ead2ea">L4virtio::Virtqueue::used_size</a></div><div class="ttdeci">static unsigned long used_size(unsigned num)</div><div class="ttdoc">Calculate the size of the used ring for num entries.</div><div class="ttdef"><b>Definition</b> <a href="#l00298">virtqueue:298</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a7ae2647d7163653bb5a250936f917a50"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a7ae2647d7163653bb5a250936f917a50">L4virtio::Virtqueue::Virtqueue</a></div><div class="ttdeci">Virtqueue()=default</div><div class="ttdoc">Create a disabled virtqueue.</div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a80c6d7100b025658ad3c05a844e4391b"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a80c6d7100b025658ad3c05a844e4391b">L4virtio::Virtqueue::used_offset</a></div><div class="ttdeci">unsigned long used_offset() const</div><div class="ttdoc">Get the offset of the used ring from the descriptor table.</div><div class="ttdef"><b>Definition</b> <a href="#l00329">virtqueue:329</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a962767a117dad07184f59191d399f9ce"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a962767a117dad07184f59191d399f9ce">L4virtio::Virtqueue::avail_size</a></div><div class="ttdeci">static unsigned long avail_size(unsigned num)</div><div class="ttdoc">Calculate the size of the available ring for num entries.</div><div class="ttdef"><b>Definition</b> <a href="#l00279">virtqueue:279</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_a96dfd139f3a022e9e2328e28716acdc9"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#a96dfd139f3a022e9e2328e28716acdc9">L4virtio::Virtqueue::total_size</a></div><div class="ttdeci">unsigned long total_size() const</div><div class="ttdoc">Calculate the total size of this virtqueue.</div><div class="ttdef"><b>Definition</b> <a href="#l00314">virtqueue:314</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_aa242e930433e8705c4ee00afaf58f686"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#aa242e930433e8705c4ee00afaf58f686">L4virtio::Virtqueue::ready</a></div><div class="ttdeci">bool ready() const</div><div class="ttdoc">Test if this queue is in working state.</div><div class="ttdef"><b>Definition</b> <a href="#l00400">virtqueue:400</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_aa4730e5b53806a3d72164e917c20e91a"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#aa4730e5b53806a3d72164e917c20e91a">L4virtio::Virtqueue::_idx_mask</a></div><div class="ttdeci">l4_uint16_t _idx_mask</div><div class="ttdoc">mask used for indexing into the descriptor table and the rings.</div><div class="ttdef"><b>Definition</b> <a href="#l00208">virtqueue:208</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_ab2dc5f70a0c42fa15e91cd8084d29cd0"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#ab2dc5f70a0c42fa15e91cd8084d29cd0">L4virtio::Virtqueue::_desc</a></div><div class="ttdeci">Desc * _desc</div><div class="ttdoc">pointer to descriptor table, NULL if queue is off.</div><div class="ttdef"><b>Definition</b> <a href="#l00197">virtqueue:197</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_abc1894fea1ed246b57027323f611de9d"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#abc1894fea1ed246b57027323f611de9d">L4virtio::Virtqueue::get_avail_idx</a></div><div class="ttdeci">l4_uint16_t get_avail_idx() const</div><div class="ttdoc">Get available index from available ring (for debugging).</div><div class="ttdef"><b>Definition</b> <a href="#l00449">virtqueue:449</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_ad478e575bf6023866e8bd4ea6b5b0200"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#ad478e575bf6023866e8bd4ea6b5b0200">L4virtio::Virtqueue::no_notify_host</a></div><div class="ttdeci">bool no_notify_host() const</div><div class="ttdoc">Get the no notify flag of this queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00426">virtqueue:426</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_ad569bf985c1849caadd7fd7c15d75cec"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#ad569bf985c1849caadd7fd7c15d75cec">L4virtio::Virtqueue::_avail</a></div><div class="ttdeci">Avail * _avail</div><div class="ttdoc">pointer to available ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00198">virtqueue:198</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_af4c017e70aa977b3d8f7a024ee3473f3"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#af4c017e70aa977b3d8f7a024ee3473f3">L4virtio::Virtqueue::_current_avail</a></div><div class="ttdeci">l4_uint16_t _current_avail</div><div class="ttdoc">The life counter for the queue.</div><div class="ttdef"><b>Definition</b> <a href="#l00202">virtqueue:202</a></div></div>
<div class="ttc" id="aclassL4virtio_1_1Virtqueue_html_af61e3e4e436b93f37f22243a1c0ffe0e"><div class="ttname"><a href="classL4virtio_1_1Virtqueue.html#af61e3e4e436b93f37f22243a1c0ffe0e">L4virtio::Virtqueue::num</a></div><div class="ttdeci">unsigned num() const</div><div class="ttdef"><b>Definition</b> <a href="#l00404">virtqueue:404</a></div></div>
<div class="ttc" id="aerr_8h_html"><div class="ttname"><a href="err_8h.html">err.h</a></div><div class="ttdoc">Error codes.</div></div>
<div class="ttc" id="aexceptions_html"><div class="ttname"><a href="exceptions.html">exceptions</a></div><div class="ttdoc">Base exceptions.</div></div>
<div class="ttc" id="agroup__l4__basic__types_html_ga4087b991c40c0d2fcde9ca331049a4d4"><div class="ttname"><a href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a></div><div class="ttdeci">unsigned long l4_addr_t</div><div class="ttdoc">Address type.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2l4int_8h_source.html#l00034">l4int.h:34</a></div></div>
<div class="ttc" id="agroup__l4__basic__types_html_gac1d09f3e382e711b776931f10e6e1e5a"><div class="ttname"><a href="group__l4__basic__types.html#gac1d09f3e382e711b776931f10e6e1e5a">l4_uint32_t</a></div><div class="ttdeci">unsigned int l4_uint32_t</div><div class="ttdoc">Unsigned 32bit value.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2l4int_8h_source.html#l00029">l4int.h:29</a></div></div>
<div class="ttc" id="agroup__l4__basic__types_html_gae8d67914f723bf843df6f311ad2619a2"><div class="ttname"><a href="group__l4__basic__types.html#gae8d67914f723bf843df6f311ad2619a2">l4_uint16_t</a></div><div class="ttdeci">unsigned short int l4_uint16_t</div><div class="ttdoc">Unsigned 16bit value.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2l4int_8h_source.html#l00027">l4int.h:27</a></div></div>
<div class="ttc" id="agroup__l4__basic__types_html_gaf3331c485014bd12a9e4f9d27a55e689"><div class="ttname"><a href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a></div><div class="ttdeci">unsigned long long l4_uint64_t</div><div class="ttdoc">Unsigned 64bit value.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2l4int_8h_source.html#l00031">l4int.h:31</a></div></div>
<div class="ttc" id="agroup__l4__error__api_html_ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8"><div class="ttname"><a href="group__l4__error__api.html#ggab4c8abc71ffa221a25c1ca5840a354f9a54ddbebc30b661c87177b968a77588b8">L4_EINVAL</a></div><div class="ttdeci">@ L4_EINVAL</div><div class="ttdoc">Invalid argument.</div><div class="ttdef"><b>Definition</b> <a href="err_8h_source.html#l00046">err.h:46</a></div></div>
<div class="ttc" id="agroup__l4__memory__api_html_gae876a4c6e0f21b2ecbf17863dc7d11e4"><div class="ttname"><a href="group__l4__memory__api.html#gae876a4c6e0f21b2ecbf17863dc7d11e4">l4_round_size</a></div><div class="ttdeci">l4_addr_t l4_round_size(l4_addr_t value, unsigned char bits) L4_NOTHROW</div><div class="ttdoc">Round value up to the next alignment with bits size.</div><div class="ttdef"><b>Definition</b> <a href="l4_2sys_2consts_8h_source.html#l00484">consts.h:484</a></div></div>
<div class="ttc" id="agroup__l4sys__defines_html_gac76599eba5afa89a12c44176cbfa90cb"><div class="ttname"><a href="group__l4sys__defines.html#gac76599eba5afa89a12c44176cbfa90cb">L4_LIKELY</a></div><div class="ttdeci">#define L4_LIKELY(x)</div><div class="ttdoc">Expression is likely to execute.</div><div class="ttdef"><b>Definition</b> <a href="compiler_8h_source.html#l00283">compiler.h:283</a></div></div>
<div class="ttc" id="al4_2sys_2types_8h_html"><div class="ttname"><a href="l4_2sys_2types_8h.html">types.h</a></div><div class="ttdoc">Common L4 ABI Data Types.</div></div>
<div class="ttc" id="anamespaceL4virtio_html"><div class="ttname"><a href="namespaceL4virtio.html">L4virtio</a></div><div class="ttdoc">L4-VIRTIO Transport C++ API.</div><div class="ttdef"><b>Definition</b> <a href="client_2l4virtio_source.html#l00026">l4virtio:26</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Avail_1_1Flags_html"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html">L4virtio::Virtqueue::Avail::Flags</a></div><div class="ttdoc">Flags of the available ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00134">virtqueue:135</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Avail_1_1Flags_html_a6d8ba20a2475c4e3b965d2994e071774"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#a6d8ba20a2475c4e3b965d2994e071774">L4virtio::Virtqueue::Avail::Flags::no_irq</a></div><div class="ttdeci">constexpr no_irq_bfm_t::Val no_irq() const</div><div class="ttdoc">Get the no_irq bits (0 to 0) of raw.</div><div class="ttdef"><b>Definition</b> <a href="#l00143">virtqueue:143</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Avail_1_1Flags_html_ad4a7ff0c58d2c05cf98a928cfe801475"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ad4a7ff0c58d2c05cf98a928cfe801475">L4virtio::Virtqueue::Avail::Flags::Flags</a></div><div class="ttdeci">Flags(l4_uint16_t v)</div><div class="ttdoc">Make Flags from the raw value.</div><div class="ttdef"><b>Definition</b> <a href="#l00140">virtqueue:140</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Avail_1_1Flags_html_ae90843051fd6660c2984df4faece68eb"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Avail_1_1Flags.html#ae90843051fd6660c2984df4faece68eb">L4virtio::Virtqueue::Avail::Flags::raw</a></div><div class="ttdeci">l4_uint16_t raw</div><div class="ttdoc">raw 16bit flags value of the available ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00136">virtqueue:136</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html">L4virtio::Virtqueue::Desc::Flags</a></div><div class="ttdoc">Type for descriptor flags.</div><div class="ttdef"><b>Definition</b> <a href="#l00092">virtqueue:93</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html_a7412bbf6d83eccc67857cf7bddaf6897"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#a7412bbf6d83eccc67857cf7bddaf6897">L4virtio::Virtqueue::Desc::Flags::next</a></div><div class="ttdeci">constexpr next_bfm_t::Val next() const</div><div class="ttdoc">Get the next bits (0 to 0) of raw.</div><div class="ttdef"><b>Definition</b> <a href="#l00101">virtqueue:101</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html_ae8a176bcd662bb1e50f08fe63147372b"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#ae8a176bcd662bb1e50f08fe63147372b">L4virtio::Virtqueue::Desc::Flags::write</a></div><div class="ttdeci">constexpr write_bfm_t::Val write() const</div><div class="ttdoc">Get the write bits (1 to 1) of raw.</div><div class="ttdef"><b>Definition</b> <a href="#l00103">virtqueue:103</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html_af55d156fb8439e393c2afead37823081"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#af55d156fb8439e393c2afead37823081">L4virtio::Virtqueue::Desc::Flags::Flags</a></div><div class="ttdeci">Flags(l4_uint16_t v)</div><div class="ttdoc">Make Flags from raw 16bit value.</div><div class="ttdef"><b>Definition</b> <a href="#l00098">virtqueue:98</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html_afa64023e5d6237498ec1844c1f0980e0"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afa64023e5d6237498ec1844c1f0980e0">L4virtio::Virtqueue::Desc::Flags::raw</a></div><div class="ttdeci">l4_uint16_t raw</div><div class="ttdoc">raw flags value of a virtio descriptor.</div><div class="ttdef"><b>Definition</b> <a href="#l00094">virtqueue:94</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Desc_1_1Flags_html_afbe72e699f3403f80e62125754c69d14"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Desc_1_1Flags.html#afbe72e699f3403f80e62125754c69d14">L4virtio::Virtqueue::Desc::Flags::indirect</a></div><div class="ttdeci">constexpr indirect_bfm_t::Val indirect() const</div><div class="ttdoc">Get the indirect bits (2 to 2) of raw.</div><div class="ttdef"><b>Definition</b> <a href="#l00105">virtqueue:105</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used_1_1Flags_html"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html">L4virtio::Virtqueue::Used::Flags</a></div><div class="ttdoc">flags for the used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00179">virtqueue:180</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used_1_1Flags_html_a2f25da3fceec3523aad6c832ac1ad4e8"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a2f25da3fceec3523aad6c832ac1ad4e8">L4virtio::Virtqueue::Used::Flags::no_notify</a></div><div class="ttdeci">constexpr no_notify_bfm_t::Val no_notify() const</div><div class="ttdoc">Get the no_notify bits (0 to 0) of raw.</div><div class="ttdef"><b>Definition</b> <a href="#l00188">virtqueue:188</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used_1_1Flags_html_a7459f27e7384bd27fbe62f2a04220e06"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#a7459f27e7384bd27fbe62f2a04220e06">L4virtio::Virtqueue::Used::Flags::raw</a></div><div class="ttdeci">l4_uint16_t raw</div><div class="ttdoc">raw flags value as specified by virtio.</div><div class="ttdef"><b>Definition</b> <a href="#l00181">virtqueue:181</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used_1_1Flags_html_aca4a2ebc408cabb091e5c1157c2256ab"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used_1_1Flags.html#aca4a2ebc408cabb091e5c1157c2256ab">L4virtio::Virtqueue::Used::Flags::Flags</a></div><div class="ttdeci">Flags(l4_uint16_t v)</div><div class="ttdoc">make Flags from raw value</div><div class="ttdef"><b>Definition</b> <a href="#l00185">virtqueue:185</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used__elem_html"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used__elem.html">L4virtio::Virtqueue::Used_elem</a></div><div class="ttdoc">Type of an element of the used ring.</div><div class="ttdef"><b>Definition</b> <a href="#l00154">virtqueue:155</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used__elem_html_a23dd02ce30dfcd61163a1ea7c93a9249"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a23dd02ce30dfcd61163a1ea7c93a9249">L4virtio::Virtqueue::Used_elem::id</a></div><div class="ttdeci">l4_uint32_t id</div><div class="ttdoc">descriptor index</div><div class="ttdef"><b>Definition</b> <a href="#l00166">virtqueue:166</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used__elem_html_a5d5771ef06d80342569d1953c760f8dd"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a5d5771ef06d80342569d1953c760f8dd">L4virtio::Virtqueue::Used_elem::len</a></div><div class="ttdeci">l4_uint32_t len</div><div class="ttdoc">length field</div><div class="ttdef"><b>Definition</b> <a href="#l00167">virtqueue:167</a></div></div>
<div class="ttc" id="astructL4virtio_1_1Virtqueue_1_1Used__elem_html_a8d174938317ffbadbe174a32fd5ff197"><div class="ttname"><a href="structL4virtio_1_1Virtqueue_1_1Used__elem.html#a8d174938317ffbadbe174a32fd5ff197">L4virtio::Virtqueue::Used_elem::Used_elem</a></div><div class="ttdeci">Used_elem(l4_uint16_t id, l4_uint32_t len)</div><div class="ttdoc">Initialize a used ring element.</div><div class="ttdef"><b>Definition</b> <a href="#l00165">virtqueue:165</a></div></div>
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