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<div class="section" id="nvlink-device-tree-bindings">
<span id="device-tree-nvlink"></span><h1>Nvlink Device Tree Bindings<a class="headerlink" href="#nvlink-device-tree-bindings" title="Permalink to this headline">¶</a></h1>
<p>See <a class="reference internal" href="../nvlink.html#nvlink"><span class="std std-ref">OPAL/Skiboot Nvlink Interface Documentation</span></a> for general Nvlink information.</p>
<p>NPU bindings:</p>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">xscom</span><span class="nf">@3fc0000000000</span> <span class="p">{</span>
<span class="nc">npu</span><span class="nf">@8013c00</span> <span class="p">{</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x8013c00</span> <span class="mh">0x2c</span><span class="p">>;</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,power8-npu"</span><span class="p">;</span>
<span class="nf">ibm,npu-index</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">ibm,npu-links</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4</span><span class="p">>;</span> <span class="cm">/* Number of links wired up to this npu. */</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bc</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bc</span><span class="p">>;</span>
<span class="nc">link</span><span class="nf">@0</span> <span class="p">{</span>
<span class="nf">ibm,npu-pbcq</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1000000b</span><span class="p">>;</span> <span class="cm">/* phandle to the pbcq which connects to the GPU. */</span>
<span class="nf">ibm,npu-phy</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x80000000</span> <span class="mh">0x8010c3f</span><span class="p">>;</span> <span class="cm">/* SCOM address of the IBM PHY controlling this link. */</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,npu-link"</span><span class="p">;</span>
<span class="nf">ibm,npu-lane-mask</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0xff</span><span class="p">>;</span> <span class="cm">/* Mask specifying which IBM PHY lanes are used for this link. */</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bd</span><span class="p">>;</span>
<span class="nf">ibm,npu-link-index</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span> <span class="cm">/* Hardware link index. Naples systems</span>
<span class="cm"> * contain links at index 0,1,4 & 5.</span>
<span class="cm"> * Used to calculate various address offsets. */</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bd</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">link</span><span class="nf">@1</span> <span class="p">{</span>
<span class="nf">ibm,npu-pbcq</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1000000b</span><span class="p">>;</span>
<span class="nf">ibm,npu-phy</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x80000000</span> <span class="mh">0x8010c3f</span><span class="p">>;</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,npu-link"</span><span class="p">;</span>
<span class="nf">ibm,npu-lane-mask</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0xff00</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002be</span><span class="p">>;</span>
<span class="nf">ibm,npu-link-index</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002be</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">link</span><span class="nf">@4</span> <span class="p">{</span>
<span class="nf">ibm,npu-pbcq</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1000000a</span><span class="p">>;</span>
<span class="nf">ibm,npu-phy</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x80000000</span> <span class="mh">0x8010c7f</span><span class="p">>;</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,npu-link"</span><span class="p">;</span>
<span class="nf">ibm,npu-lane-mask</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0xff00</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bf</span><span class="p">>;</span>
<span class="nf">ibm,npu-link-index</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bf</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">link</span><span class="nf">@5</span> <span class="p">{</span>
<span class="nf">ibm,npu-pbcq</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1000000a</span><span class="p">>;</span>
<span class="nf">ibm,npu-phy</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x80000000</span> <span class="mh">0x8010c7f</span><span class="p">>;</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,npu-link"</span><span class="p">;</span>
<span class="nf">ibm,npu-lane-mask</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0xff</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002c0</span><span class="p">>;</span>
<span class="nf">ibm,npu-link-index</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x5</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002c0</span><span class="p">>;</span>
<span class="p">};</span>
<span class="p">};</span>
<span class="p">};</span>
</pre></div>
</div>
<div class="section" id="gpu-memory-bindings">
<h2>GPU memory bindings<a class="headerlink" href="#gpu-memory-bindings" title="Permalink to this headline">¶</a></h2>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">memory</span><span class="nf">@100000000</span> <span class="p">{</span>
<span class="nf">device_type</span> <span class="o">=</span> <span class="s">"memory"</span>
<span class="err">compatible</span> <span class="err">=</span> <span class="s">"ibm,coherent-device-memory"</span><span class="p">;</span>
<span class="nf">linux,usable-memory</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x100000000</span> <span class="mh">0x0</span> <span class="mh">0x0</span><span class="p">>;</span>
<span class="err">;</span> <span class="err">denotes</span> <span class="err">a</span> <span class="err">region</span> <span class="err">of</span> <span class="err">unplugged</span> <span class="err">system</span> <span class="err">memory</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x100000000</span> <span class="mh">0x0</span> <span class="mh">0x80000000</span><span class="p">>;</span>
<span class="nf">ibm,associativity</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x64</span><span class="p">>;</span>
<span class="err">;</span> <span class="err">numa</span> <span class="err">associativity</span> <span class="err">for</span> <span class="err">the</span> <span class="err">memory</span> <span class="err">once</span> <span class="err">it</span> <span class="err">is</span> <span class="err">hotplugged</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000abc</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000abc</span><span class="p">>;</span>
<span class="p">};</span>
</pre></div>
</div>
</div>
<div class="section" id="emulated-pci-device-bindings">
<h2>Emulated PCI device bindings<a class="headerlink" href="#emulated-pci-device-bindings" title="Permalink to this headline">¶</a></h2>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">pciex</span><span class="nf">@3fff000400000</span> <span class="p">{</span>
<span class="nf">ibm,npcq</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002bc</span><span class="p">>;</span> <span class="cm">/* phandle to the NPU node. Used to find associated PCI GPU devices. */</span>
<span class="nf">compatible</span> <span class="o">=</span> <span class="s">"ibm,power8-npu-pciex", "ibm,ioda2-npu-phb"</span><span class="p">;</span>
<span class="nc">pci</span><span class="nf">@0</span> <span class="p">{</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">revision-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">interrupts</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">device-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4ea</span><span class="p">>;</span>
<span class="nf">ibm,pci-config-space-type</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">vendor-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1014</span><span class="p">>;</span>
<span class="nf">ibm,gpu</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002f7</span><span class="p">>;</span> <span class="cm">/* phandle pointing the associated GPU PCI device node */</span>
<span class="nf">memory-region</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000abc</span><span class="p">>;</span> <span class="cm">/* phandle pointing to the GPU memory */</span>
<span class="nf">ibm,nvlink-speed</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="err">;</span> <span class="err">Denotes</span> <span class="err">the</span> <span class="err">speed</span> <span class="err">the</span> <span class="err">link</span> <span class="err">is</span> <span class="err">running</span> <span class="nl">at</span><span class="p">:</span>
<span class="err">;</span> <span class="nf">0x3</span> <span class="o">=</span><span class="err">=</span> <span class="mi">20</span> <span class="err">Gbps</span><span class="p">,</span> <span class="mh">0x8</span> <span class="err">=</span> <span class="mi">25</span><span class="err">.</span><span class="mi">78125</span> <span class="err">Gbps</span><span class="p">,</span> <span class="mh">0x9</span> <span class="err">==</span> <span class="mi">25</span><span class="err">.</span><span class="mo">00000</span> <span class="err">Gbps</span>
<span class="err">phandle</span> <span class="err">=</span> <span class="p"><</span><span class="mh">0x100002fc</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">pci</span><span class="nf">@1</span> <span class="p">{</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x800</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">revision-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">interrupts</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">device-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4ea</span><span class="p">>;</span>
<span class="nf">ibm,pci-config-space-type</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">vendor-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1014</span><span class="p">>;</span>
<span class="nf">ibm,gpu</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002f5</span><span class="p">>;</span>
<span class="nf">memory-region</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000def</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002fe</span><span class="p">>;</span>
<span class="nf">class-code</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x60400</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002fe</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">pci</span><span class="nf">@0,1</span> <span class="p">{</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">revision-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">interrupts</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x2</span><span class="p">>;</span>
<span class="nf">device-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4ea</span><span class="p">>;</span>
<span class="nf">ibm,pci-config-space-type</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">vendor-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1014</span><span class="p">>;</span>
<span class="nf">ibm,gpu</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002f7</span><span class="p">>;</span>
<span class="nf">memory-region</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000abc</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002fd</span><span class="p">>;</span>
<span class="nf">class-code</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x60400</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002fd</span><span class="p">>;</span>
<span class="p">};</span>
<span class="nc">pci</span><span class="nf">@1,1</span> <span class="p">{</span>
<span class="nf">reg</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x900</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span> <span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">revision-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x0</span><span class="p">>;</span>
<span class="nf">interrupts</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x2</span><span class="p">>;</span>
<span class="nf">device-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x4ea</span><span class="p">>;</span>
<span class="nf">ibm,pci-config-space-type</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1</span><span class="p">>;</span>
<span class="nf">vendor-id</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x1014</span><span class="p">>;</span>
<span class="nf">ibm,gpu</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002f5</span><span class="p">>;</span>
<span class="nf">memory-region</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x10000def</span><span class="p">>;</span>
<span class="nf">phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002ff</span><span class="p">>;</span>
<span class="nf">class-code</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x60400</span><span class="p">>;</span>
<span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p"><</span><span class="mh">0x100002ff</span><span class="p">>;</span>
<span class="p">};</span>
<span class="p">};</span>
</pre></div>
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