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| <section id="opal-pci-set-peltv"> |
| <span id="id1"></span><h1>OPAL_PCI_SET_PELTV<a class="headerlink" href="#opal-pci-set-peltv" title="Link to this heading">¶</a></h1> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define OPAL_PCI_SET_PELTV 32</span> |
| |
| <span class="kt">int64_t</span><span class="w"> </span><span class="nf">opal_pci_set_peltv</span><span class="p">(</span><span class="kt">uint64_t</span><span class="w"> </span><span class="n">phb_id</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">parent_pe</span><span class="p">,</span> |
| <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">child_pe</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">state</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p><strong>WARNING:</strong> This documentation comes from an old source and is possibly not up |
| to date with OPALv3. Rely on this documentation only as a starting point, |
| use the source (and update the docs).</p> |
| <p>This call sets the PELTV of a parent PE to add or remove a PE number as a PE |
| within that parent PE domain. The host must call this function for each child |
| of a parent PE.</p> |
| <dl class="simple"> |
| <dt><code class="docutils literal notranslate"><span class="pre">phb_id</span></code></dt><dd><p>is the value from the PHB node ibm,opal-phbid property</p> |
| </dd> |
| <dt><code class="docutils literal notranslate"><span class="pre">parent_pe</span></code></dt><dd><p>is the PE number of a PE that is higher in the PCI hierarchy |
| to other PEs, such that an error involving this parent PE should cause a |
| collateral PE freeze for PEs below this PE in the PCI hierarchy. For example |
| a switch upstream bridge is a PE that is parent to PEs reached through that |
| upstream bridge such that an error involving the upstream bridge |
| (e.g, ERR_FATAL) should cause the PHB to freeze all other PEs below that |
| upstream bridge (e.g., a downstream bridge, or devices below a downstream |
| bridge).</p> |
| </dd> |
| <dt><code class="docutils literal notranslate"><span class="pre">child_pe</span></code></dt><dd><p>is the PE number of a PE that is lower in the PCI hierarchy |
| than another PE, such that an error involving that other PE should cause a |
| collateral PE freeze for this child PE. For example a device below a |
| downstream bridge of a PCIE switch is a child PE that downstream bridge PE |
| and the upstream bridge PE of that switch – an ERR_Fatal from either bridge |
| should result in a collateral freeze of that device PE.</p> |
| </dd> |
| </dl> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="k">enum</span><span class="w"> </span><span class="n">OpalPeltvAction</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">OPAL_REMOVE_PE_FROM_DOMAIN</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span> |
| <span class="w"> </span><span class="n">OPAL_ADD_PE_TO_DOMAIN</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span> |
| <span class="p">};</span> |
| </pre></div> |
| </div> |
| <p><strong>OPAL Implementation Note:</strong> |
| <strong>WARNING TODO</strong>: <em>CHECK IF THIS IS CORRECT FOR skiboot:</em> |
| For ibm,opal-ioda2, OPAL sets the PELTV bit in all RTT entries for the parent |
| PE when the state argument is ‘1’. OPAL clears the PELTV bit in all RTT |
| entries for the parent PE when the state argument is ‘0’ and setting the child |
| PE bit in the parent PELTV results in an all-zeros value for that PELTV.</p> |
| <p>Return value:</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">phb</span><span class="p">)</span> |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">OPAL_PARAMETER</span><span class="p">;</span> |
| <span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">phb</span><span class="o">-></span><span class="n">ops</span><span class="o">-></span><span class="n">set_peltv</span><span class="p">)</span> |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">OPAL_UNSUPPORTED</span><span class="p">;</span> |
| </pre></div> |
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