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Viktor Reusch
2025-09-12 15:55:45 +02:00
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<div class="headertitle"><div class="title">L4virtio::Device Class Reference</div></div>
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<p>IPC interface for virtio over <a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> IPC.
<a href="#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="l4virtio_source.html">l4virtio</a>&gt;</code></p>
<div id="dynsection-0" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Inheritance diagram for L4virtio::Device:</div>
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<div id="dynsection-1" onclick="return dynsection.toggleVisibility(this)" class="dynheader closed" style="cursor:pointer;"><span class="dynarrow"><span class="arrowhead closed"></span></span>Collaboration diagram for L4virtio::Device:</div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-pub-methods" class="groupheader"><a id="pub-methods" name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ab2e1044b9a29628c3ed7945b9dfe4cad" id="r_ab2e1044b9a29628c3ed7945b9dfe4cad"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ab2e1044b9a29628c3ed7945b9dfe4cad">set_status</a> (unsigned status)</td></tr>
<tr class="memdesc:ab2e1044b9a29628c3ed7945b9dfe4cad"><td class="mdescLeft">&#160;</td><td class="mdescRight">Write the VIRTIO status register. <br /></td></tr>
<tr class="memitem:a47218ed005d79308d0e297d1a731a517" id="r_a47218ed005d79308d0e297d1a731a517"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a47218ed005d79308d0e297d1a731a517">config_queue</a> (unsigned queue)</td></tr>
<tr class="memdesc:a47218ed005d79308d0e297d1a731a517"><td class="mdescLeft">&#160;</td><td class="mdescRight">Trigger queue configuration of the given queue. <br /></td></tr>
<tr class="memitem:a033005cb79e876d02b8ca405ffadca2b" id="r_a033005cb79e876d02b8ca405ffadca2b"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a033005cb79e876d02b8ca405ffadca2b">register_ds</a> (<a class="el" href="classL4_1_1Ipc_1_1Cap.html">L4::Ipc::Cap</a>&lt; <a class="el" href="classL4Re_1_1Dataspace.html">L4Re::Dataspace</a> &gt; ds_cap, <a class="el" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a> base, <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> offset, <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> size)</td></tr>
<tr class="memdesc:a033005cb79e876d02b8ca405ffadca2b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Register a shared data space with VIRTIO host. <br /></td></tr>
<tr class="memitem:a47e53efa92534451e46ecd4fef7060da" id="r_a47e53efa92534451e46ecd4fef7060da"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a47e53efa92534451e46ecd4fef7060da">device_config</a> (<a class="el" href="structL4_1_1Ipc_1_1Out.html">L4::Ipc::Out</a>&lt; <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="classL4Re_1_1Dataspace.html">L4Re::Dataspace</a> &gt; &gt; config_ds, <a class="el" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> *ds_offset)</td></tr>
<tr class="memdesc:a47e53efa92534451e46ecd4fef7060da"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the dataspace with the <a class="el" href="namespaceL4virtio.html" title="L4-VIRTIO Transport C++ API.">L4virtio</a> configuration page. <br /></td></tr>
<tr class="memitem:a2c81a536513972d43f95394d88c39147" id="r_a2c81a536513972d43f95394d88c39147"><td class="memItemLeft" align="right" valign="top">long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a2c81a536513972d43f95394d88c39147">device_notification_irq</a> (unsigned index, <a class="el" href="structL4_1_1Ipc_1_1Out.html">L4::Ipc::Out</a>&lt; <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="structL4_1_1Triggerable.html">L4::Triggerable</a> &gt; &gt; irq)</td></tr>
<tr class="memdesc:a2c81a536513972d43f95394d88c39147"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the notification interrupt corresponding to the given index. <br /></td></tr>
<tr class="inherit_header pub_methods_classL4_1_1Icu"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pub_methods_classL4_1_1Icu')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Public Member Functions inherited from <a class="el" href="classL4_1_1Icu.html">L4::Icu</a></td></tr>
<tr class="memitem:ada7541da586ea09b925b4d90d7dc357e inherit pub_methods_classL4_1_1Icu" id="r_ada7541da586ea09b925b4d90d7dc357e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#ada7541da586ea09b925b4d90d7dc357e">bind</a> (unsigned irqnum, <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="structL4_1_1Triggerable.html">Triggerable</a> &gt; irq, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:ada7541da586ea09b925b4d90d7dc357e inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Bind an interrupt line of an interrupt controller to an interrupt object. <br /></td></tr>
<tr class="memitem:aa34e56cdac798b1949fcc00553386b8b inherit pub_methods_classL4_1_1Icu" id="r_aa34e56cdac798b1949fcc00553386b8b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#aa34e56cdac798b1949fcc00553386b8b">unbind</a> (unsigned irqnum, <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="structL4_1_1Triggerable.html">Triggerable</a> &gt; irq, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:aa34e56cdac798b1949fcc00553386b8b inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Remove binding of an interrupt line from the interrupt controller object. <br /></td></tr>
<tr class="memitem:a356cfa88076c92e121ab7760d50d5f18 inherit pub_methods_classL4_1_1Icu" id="r_a356cfa88076c92e121ab7760d50d5f18"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#a356cfa88076c92e121ab7760d50d5f18">info</a> (<a class="el" href="structl4__icu__info__t.html">l4_icu_info_t</a> *info, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:a356cfa88076c92e121ab7760d50d5f18 inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get information about the ICU features. <br /></td></tr>
<tr class="memitem:a16857d27edd9799b0f2da2f244968463 inherit pub_methods_classL4_1_1Icu" id="r_a16857d27edd9799b0f2da2f244968463"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#a16857d27edd9799b0f2da2f244968463">msi_info</a> (<a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> irqnum, <a class="el" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a> source, <a class="el" href="structl4__icu__msi__info__t.html">l4_icu_msi_info_t</a> *msi_info)</td></tr>
<tr class="memdesc:a16857d27edd9799b0f2da2f244968463 inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get MSI info about IRQ. <br /></td></tr>
<tr class="memitem:ab58aa015a5216a0dece5d85089b42aaa inherit pub_methods_classL4_1_1Icu" id="r_ab58aa015a5216a0dece5d85089b42aaa"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#ab58aa015a5216a0dece5d85089b42aaa">mask</a> (unsigned irqnum, <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *label=0, <a class="el" href="unionl4__timeout__t.html">l4_timeout_t</a> to=<a class="el" href="group__l4__timeout__api.html#gaf01c5e1475efc4f33bc7d1985f7320d3">L4_IPC_NEVER</a>, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:ab58aa015a5216a0dece5d85089b42aaa inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Mask an IRQ line. <br /></td></tr>
<tr class="memitem:a4258b1c32fc968b66a1ce15191f51b8b inherit pub_methods_classL4_1_1Icu" id="r_a4258b1c32fc968b66a1ce15191f51b8b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Icu.html#a4258b1c32fc968b66a1ce15191f51b8b">set_mode</a> (unsigned irqnum, <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> mode, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:a4258b1c32fc968b66a1ce15191f51b8b inherit pub_methods_classL4_1_1Icu"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set interrupt mode. <br /></td></tr>
<tr class="inherit_header pub_methods_classL4_1_1Irq__eoi"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pub_methods_classL4_1_1Irq__eoi')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Public Member Functions inherited from <a class="el" href="classL4_1_1Irq__eoi.html">L4::Irq_eoi</a></td></tr>
<tr class="memitem:a2143eb2495d0135bc432efc362845483 inherit pub_methods_classL4_1_1Irq__eoi" id="r_a2143eb2495d0135bc432efc362845483"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structl4__msgtag__t.html">l4_msgtag_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classL4_1_1Irq__eoi.html#a2143eb2495d0135bc432efc362845483">unmask</a> (unsigned irqnum, <a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a> *label=0, <a class="el" href="unionl4__timeout__t.html">l4_timeout_t</a> to=<a class="el" href="group__l4__timeout__api.html#gaf01c5e1475efc4f33bc7d1985f7320d3">L4_IPC_NEVER</a>, <a class="el" href="group__l4__utcb__api.html#ga89be8a86d11c1d532b636cc2df1330fb">l4_utcb_t</a> *utcb=<a class="el" href="group__l4__utcb__api.html#gadc099b4a59e1d99638c72c11a8c8b644">l4_utcb</a>()) noexcept</td></tr>
<tr class="memdesc:a2143eb2495d0135bc432efc362845483 inherit pub_methods_classL4_1_1Irq__eoi"><td class="mdescLeft">&#160;</td><td class="mdescRight">Unmask the given interrupt line. <br /></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-inherited" class="groupheader"><a id="inherited" name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pro_types_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_types_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Protected Types inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Device, L4::Icu, L4VIRTIO_PROTOCOL, L4::Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:af7df35ba5bf68ef5993e605a6b62328a inherit pro_types_classL4_1_1Kobject__t" id="r_af7df35ba5bf68ef5993e605a6b62328a"><td class="memItemLeft" align="right" valign="top">
typedef Device&#160;</td><td class="memItemRight" valign="bottom"><b>Class</b></td></tr>
<tr class="memdesc:af7df35ba5bf68ef5993e605a6b62328a inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The target interface type (inheriting from <a class="el" href="classL4_1_1Kobject__t.html" title="Helper class to create an L4Re interface class that is derived from a single base class.">Kobject_t</a>). <br /></td></tr>
<tr class="memitem:a0d83157994565e9c01f10006bdda2efa inherit pro_types_classL4_1_1Kobject__t" id="r_a0d83157994565e9c01f10006bdda2efa"><td class="memItemLeft" align="right" valign="top">
typedef Typeid::Iface&lt; PROTO, Device &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>__Iface</b></td></tr>
<tr class="memdesc:a0d83157994565e9c01f10006bdda2efa inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The interface description for the derived class. <br /></td></tr>
<tr class="memitem:afc2feec2f4a15e85286aabfa15c53e06 inherit pro_types_classL4_1_1Kobject__t" id="r_afc2feec2f4a15e85286aabfa15c53e06"><td class="memItemLeft" align="right" valign="top">
typedef Typeid::Merge_list&lt; Typeid::Iface_list&lt; <a class="el" href="classL4_1_1Kobject__t.html#a0d83157994565e9c01f10006bdda2efa">__Iface</a> &gt;, typename L4::Icu::__Iface_list &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>__Iface_list</b></td></tr>
<tr class="memdesc:afc2feec2f4a15e85286aabfa15c53e06 inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The list of all RPC interfaces provided directly or through inheritance. <br /></td></tr>
<tr class="inherit_header pro_types_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_types_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Protected Types inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Icu, Irq_eoi, L4_PROTO_IRQ, Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:af7df35ba5bf68ef5993e605a6b62328a inherit pro_types_classL4_1_1Kobject__t" id="r_af7df35ba5bf68ef5993e605a6b62328a"><td class="memItemLeft" align="right" valign="top">
typedef <a class="el" href="classL4_1_1Icu.html">Icu</a>&#160;</td><td class="memItemRight" valign="bottom"><b>Class</b></td></tr>
<tr class="memdesc:af7df35ba5bf68ef5993e605a6b62328a inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The target interface type (inheriting from <a class="el" href="classL4_1_1Kobject__t.html" title="Helper class to create an L4Re interface class that is derived from a single base class.">Kobject_t</a>). <br /></td></tr>
<tr class="memitem:a0d83157994565e9c01f10006bdda2efa inherit pro_types_classL4_1_1Kobject__t" id="r_a0d83157994565e9c01f10006bdda2efa"><td class="memItemLeft" align="right" valign="top">
typedef Typeid::Iface&lt; PROTO, <a class="el" href="classL4_1_1Icu.html">Icu</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>__Iface</b></td></tr>
<tr class="memdesc:a0d83157994565e9c01f10006bdda2efa inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The interface description for the derived class. <br /></td></tr>
<tr class="memitem:afc2feec2f4a15e85286aabfa15c53e06 inherit pro_types_classL4_1_1Kobject__t" id="r_afc2feec2f4a15e85286aabfa15c53e06"><td class="memItemLeft" align="right" valign="top">
typedef Typeid::Merge_list&lt; Typeid::Iface_list&lt; <a class="el" href="classL4_1_1Kobject__t.html#a0d83157994565e9c01f10006bdda2efa">__Iface</a> &gt;, typename Irq_eoi::__Iface_list &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>__Iface_list</b></td></tr>
<tr class="memdesc:afc2feec2f4a15e85286aabfa15c53e06 inherit pro_types_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">The list of all RPC interfaces provided directly or through inheritance. <br /></td></tr>
<tr class="inherit_header pro_methods_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_methods_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Protected Member Functions inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Device, L4::Icu, L4VIRTIO_PROTOCOL, L4::Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:a3d80fec7e057d575ec4b393437f05f8a inherit pro_methods_classL4_1_1Kobject__t" id="r_a3d80fec7e057d575ec4b393437f05f8a"><td class="memItemLeft" align="right" valign="top">
<a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="classL4_1_1Kobject__t.html#af7df35ba5bf68ef5993e605a6b62328a">Class</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>c</b> () const noexcept</td></tr>
<tr class="memdesc:a3d80fec7e057d575ec4b393437f05f8a inherit pro_methods_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the capability to ourselves. <br /></td></tr>
<tr class="inherit_header pro_methods_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_methods_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Protected Member Functions inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Icu, Irq_eoi, L4_PROTO_IRQ, Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:a3d80fec7e057d575ec4b393437f05f8a inherit pro_methods_classL4_1_1Kobject__t" id="r_a3d80fec7e057d575ec4b393437f05f8a"><td class="memItemLeft" align="right" valign="top">
<a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="classL4_1_1Kobject__t.html#af7df35ba5bf68ef5993e605a6b62328a">Class</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>c</b> () const noexcept</td></tr>
<tr class="memdesc:a3d80fec7e057d575ec4b393437f05f8a inherit pro_methods_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the capability to ourselves. <br /></td></tr>
<tr class="inherit_header pro_static_methods_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_static_methods_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Static Protected Member Functions inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Device, L4::Icu, L4VIRTIO_PROTOCOL, L4::Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:a7433b8eed587278821dd496864f75363 inherit pro_static_methods_classL4_1_1Kobject__t" id="r_a7433b8eed587278821dd496864f75363"><td class="memItemLeft" align="right" valign="top">
static void&#160;</td><td class="memItemRight" valign="bottom"><b>__check_protocols__</b> () noexcept</td></tr>
<tr class="memdesc:a7433b8eed587278821dd496864f75363 inherit pro_static_methods_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper to check for protocol conflicts. <br /></td></tr>
<tr class="inherit_header pro_static_methods_classL4_1_1Kobject__t"><td colspan="2" onclick="javascript:dynsection.toggleInherit('pro_static_methods_classL4_1_1Kobject__t')"><span class="dynarrow"><span class="arrowhead closed"></span></span>Static Protected Member Functions inherited from <a class="el" href="classL4_1_1Kobject__t.html">L4::Kobject_t&lt; Icu, Irq_eoi, L4_PROTO_IRQ, Type_info::Demand_t&lt; 1 &gt; &gt;</a></td></tr>
<tr class="memitem:a7433b8eed587278821dd496864f75363 inherit pro_static_methods_classL4_1_1Kobject__t" id="r_a7433b8eed587278821dd496864f75363"><td class="memItemLeft" align="right" valign="top">
static void&#160;</td><td class="memItemRight" valign="bottom"><b>__check_protocols__</b> () noexcept</td></tr>
<tr class="memdesc:a7433b8eed587278821dd496864f75363 inherit pro_static_methods_classL4_1_1Kobject__t"><td class="mdescLeft">&#160;</td><td class="mdescRight">Helper to check for protocol conflicts. <br /></td></tr>
</table>
<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<div class="textblock"><p>IPC interface for virtio over <a class="el" href="namespaceL4.html" title="L4 low-level kernel interface.">L4</a> IPC. </p>
<p>The <a class="el" href="namespaceL4virtio.html" title="L4-VIRTIO Transport C++ API.">L4virtio</a> protocol is an adaption of the mmio virtio transport 1.0(4). This interface allows to exchange the necessary resources: device configuration page, notification interrupts and dataspaces for payload.</p>
<p>Notification interrupts can be configured independently for changes to the configuration space and each queue through special L4virtio-specific notify_index fields in the config page and queue configuration. The interface distinguishes between device-to-driver and driver-to-device notification interrupts.</p>
<p>Device-to-driver interrupts are configured via the ICU interface. The device announces the maximum number of supported interrupts via Icu::info(). The driver can then bind interrupts using Icu::bind().</p>
<p>Driver-to-device interrupts must be requested from the device through <a class="el" href="#a2c81a536513972d43f95394d88c39147" title="Get the notification interrupt corresponding to the given index.">device_notification_irq()</a>. </p>
<p class="definition">Definition at line <a class="el" href="l4virtio_source.html#l00039">39</a> of file <a class="el" href="l4virtio_source.html">l4virtio</a>.</p>
</div><a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a47218ed005d79308d0e297d1a731a517">&#9670;&#160;</a></span>config_queue()</h2>
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<td class="memname">long L4virtio::Device::config_queue </td>
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<td class="paramtype">unsigned</td> <td class="paramname"><span class="paramname"><em>queue</em></span></td><td>)</td>
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<p>Trigger queue configuration of the given queue. </p>
<p>Usually all queues are configured when the status is written to running. However, in some cases queues shall be disabled or enabled dynamically, in this case this function triggers a reconfiguration from the shared memory register of the queue config.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">queue</td><td>Queue index for the queue to be configured.</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">0</td><td>on success. </td></tr>
<tr><td class="paramname">-L4_EIO</td><td>The queue's status is invalid. </td></tr>
<tr><td class="paramname">-L4_ERANGE</td><td>The queue index exceeds the number of queues. </td></tr>
<tr><td class="paramname">-L4_EINVAL</td><td>Otherwise. </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="#a47218ed005d79308d0e297d1a731a517">config_queue()</a>, <a class="el" href="virtio_8h_source.html#l00056">L4VIRTIO_OP_REGISTER_DS</a>, and <a class="el" href="#a033005cb79e876d02b8ca405ffadca2b">register_ds()</a>.</p>
<p class="reference">Referenced by <a class="el" href="#a47218ed005d79308d0e297d1a731a517">config_queue()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a47e53efa92534451e46ecd4fef7060da">&#9670;&#160;</a></span>device_config()</h2>
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<td class="memname">long L4virtio::Device::device_config </td>
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<td class="paramtype"><a class="el" href="structL4_1_1Ipc_1_1Out.html">L4::Ipc::Out</a>&lt; <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="classL4Re_1_1Dataspace.html">L4Re::Dataspace</a> &gt; &gt;</td> <td class="paramname"><span class="paramname"><em>config_ds</em></span>, </td>
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<td class="paramtype"><a class="el" href="group__l4__basic__types.html#ga4087b991c40c0d2fcde9ca331049a4d4">l4_addr_t</a> *</td> <td class="paramname"><span class="paramname"><em>ds_offset</em></span>&#160;)</td>
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<p>Get the dataspace with the <a class="el" href="namespaceL4virtio.html" title="L4-VIRTIO Transport C++ API.">L4virtio</a> configuration page. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">config_ds</td><td>Capability for receiving the dataspace capability for the shared L4-VIRTIO config data space. </td></tr>
<tr><td class="paramname">ds_offset</td><td>Offset into the dataspace where the device configuration structure starts. </td></tr>
</table>
</dd>
</dl>
<p class="reference">References <a class="el" href="#a2c81a536513972d43f95394d88c39147">device_notification_irq()</a>, and <a class="el" href="virtio_8h_source.html#l00058">L4VIRTIO_OP_GET_DEVICE_IRQ</a>.</p>
<p class="reference">Referenced by <a class="el" href="#a033005cb79e876d02b8ca405ffadca2b">register_ds()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a2c81a536513972d43f95394d88c39147">&#9670;&#160;</a></span>device_notification_irq()</h2>
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<td class="memname">long L4virtio::Device::device_notification_irq </td>
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<td class="paramtype">unsigned</td> <td class="paramname"><span class="paramname"><em>index</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="structL4_1_1Ipc_1_1Out.html">L4::Ipc::Out</a>&lt; <a class="el" href="classL4_1_1Cap.html">L4::Cap</a>&lt; <a class="el" href="structL4_1_1Triggerable.html">L4::Triggerable</a> &gt; &gt;</td> <td class="paramname"><span class="paramname"><em>irq</em></span>&#160;)</td>
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<p>Get the notification interrupt corresponding to the given index. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">index</td><td>Index of the interrupt. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">irq</td><td>Triggerable for the given index.</td></tr>
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<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">L4_EOK</td><td>Success. </td></tr>
<tr><td class="paramname">L4_ENOSYS</td><td>IRQ notification not supported by device. </td></tr>
<tr><td class="paramname">&lt;0</td><td>Other error.</td></tr>
</table>
</dd>
</dl>
<p>An index is only guaranteed to return an IRQ object when the index is set in one of the device notify index fields. The device must return the same interrupt for a given index as long as the index is in use. If an index disappears as a result of a configuration change and then is reused later, the interrupt is not guaranteed to be the same.</p>
<p>Interrupts must always be rerequested after a device reset. </p>
<p class="reference">Referenced by <a class="el" href="#a47e53efa92534451e46ecd4fef7060da">device_config()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a033005cb79e876d02b8ca405ffadca2b">&#9670;&#160;</a></span>register_ds()</h2>
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<td class="memname">long L4virtio::Device::register_ds </td>
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<td class="paramtype"><a class="el" href="classL4_1_1Ipc_1_1Cap.html">L4::Ipc::Cap</a>&lt; <a class="el" href="classL4Re_1_1Dataspace.html">L4Re::Dataspace</a> &gt;</td> <td class="paramname"><span class="paramname"><em>ds_cap</em></span>, </td>
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<td class="paramtype"><a class="el" href="group__l4__basic__types.html#gaf3331c485014bd12a9e4f9d27a55e689">l4_uint64_t</a></td> <td class="paramname"><span class="paramname"><em>base</em></span>, </td>
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<td class="paramtype"><a class="el" href="group__l4__basic__types.html#ga1c2c4b333f75b1d05b59855910f2b9cb">l4_umword_t</a></td> <td class="paramname"><span class="paramname"><em>offset</em></span>, </td>
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<p>Register a shared data space with VIRTIO host. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ds_cap</td><td>Dataspace capability to register. The lower 8 bits determine the rights mask with which the guest's rights are masked during the registration of the dataspace at the VIRTIO host. </td></tr>
<tr><td class="paramname">base</td><td>VIRTIO guest physical start address of shared memory region </td></tr>
<tr><td class="paramname">offset</td><td>Offset within the data space that is attached to the given <span class="tt">base</span> in the guest physical memory. </td></tr>
<tr><td class="paramname">size</td><td>Size of the memory region in the guest</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">L4_EOK</td><td>Operation successful. </td></tr>
<tr><td class="paramname">-L4_EINVAL</td><td>The <span class="tt">ds_cap</span> capability is invalid, does not refer to a valid dataspace, is not a trusted dataspace if trusted dataspace validation is enabled, or <span class="tt">size</span> and <span class="tt">offset</span> specify an invalid region. </td></tr>
<tr><td class="paramname">-L4_ENOMEM</td><td>The limit of dataspaces that can be registered has been reached or no capability slot could be allocated. </td></tr>
<tr><td class="paramname">-L4_ERANGE</td><td><span class="tt">offset</span> is lager than the size of the dataspace. </td></tr>
<tr><td class="paramname">&lt;0</td><td>Any error returned by the dataspace when queried for information during setup or any error returned by the region manager from attaching the dataspace. </td></tr>
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</dd>
</dl>
<p class="reference">References <a class="el" href="#a47e53efa92534451e46ecd4fef7060da">device_config()</a>, and <a class="el" href="virtio_8h_source.html#l00057">L4VIRTIO_OP_DEVICE_CONFIG</a>.</p>
<p class="reference">Referenced by <a class="el" href="#a47218ed005d79308d0e297d1a731a517">config_queue()</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ab2e1044b9a29628c3ed7945b9dfe4cad">&#9670;&#160;</a></span>set_status()</h2>
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<td class="memname">long L4virtio::Device::set_status </td>
<td>(</td>
<td class="paramtype">unsigned</td> <td class="paramname"><span class="paramname"><em>status</em></span></td><td>)</td>
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<p>Write the VIRTIO status register. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">status</td><td>Status word to write to the VIRTIO status.</td></tr>
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</dd>
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<dl class="retval"><dt>Return values</dt><dd>
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<tr><td class="paramname">0</td><td>on success.</td></tr>
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</dd>
</dl>
<dl class="section note"><dt>Note</dt><dd>All other registers are accessed via shared memory. </dd></dl>
<p class="reference">References <a class="el" href="virtio_8h_source.html#l00055">L4VIRTIO_OP_CONFIG_QUEUE</a>, and <a class="el" href="#ab2e1044b9a29628c3ed7945b9dfe4cad">set_status()</a>.</p>
<p class="reference">Referenced by <a class="el" href="#ab2e1044b9a29628c3ed7945b9dfe4cad">set_status()</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>l4/l4virtio/<a class="el" href="l4virtio_source.html">l4virtio</a></li>
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