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| <section id="how-to-log-errors-on-opal"> |
| <h1>How to log errors on OPAL<a class="headerlink" href="#how-to-log-errors-on-opal" title="Link to this heading">¶</a></h1> |
| <p>Currently the errors reported by OPAL interfaces are in free form, where as |
| errors reported by service processor is in standard Platform Error Log (PEL) |
| format. For out-of band management via IPMI interfaces, it is necessary to |
| push down the errors to service processor via mailbox (reported by OPAL) |
| in PEL format.</p> |
| <p>PEL size can vary from 2K-16K bytes, fields of which needs to populated based |
| on the kind of event and error that needs to be reported. All the information |
| needed to be reported as part of the error, is passed by user using the |
| error-logging interfaces outlined below. Following which, PEL structure is |
| generated based on the input and then passed on to service processor.</p> |
| <p>We do create eSEL error log format for some service processors but it’s just |
| a wrapper around PEL format. Actual data still stays in PEL format.</p> |
| <section id="error-logging-interfaces-in-opal"> |
| <h2>Error logging interfaces in OPAL<a class="headerlink" href="#error-logging-interfaces-in-opal" title="Link to this heading">¶</a></h2> |
| <p>Interfaces are provided for the user to log/report an error in OPAL. Using |
| these interfaces relevant error information is collected and later converted |
| to PEL format and then pushed to service processor.</p> |
| <p>Step 1: To report an error, invoke <code class="docutils literal notranslate"><span class="pre">opal_elog_create()</span></code> with required argument.</p> |
| <blockquote> |
| <div><p><code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">errorlog</span> <span class="pre">*opal_elog_create(struct</span> <span class="pre">opal_err_info</span> <span class="pre">*e_info,</span> <span class="pre">uint32_t</span> <span class="pre">tag);</span></code></p> |
| </div></blockquote> |
| <p>Parameters:</p> |
| <blockquote> |
| <div><ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">opal_err_info</span> <span class="pre">*e_info</span></code> |
| Struct to hold information identifying error/event source.</p></li> |
| <li><dl class="simple"> |
| <dt><code class="docutils literal notranslate"><span class="pre">uint32_t</span> <span class="pre">tag:</span></code> Unique value to identify the data.</dt><dd><p>Ideal to have ASCII value for 4-byte string.</p> |
| </dd> |
| </dl> |
| </li> |
| </ul> |
| <p>The opal_err_info struct holds several pieces of information to help |
| identify the error/event. The struct can be obtained via the |
| <code class="docutils literal notranslate"><span class="pre">DEFINE_LOG_ENTRY</span></code> macro as below - it only needs to be called once.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">DEFINE_LOG_ENTRY</span><span class="p">(</span><span class="n">OPAL_RC_ATTN</span><span class="p">,</span> <span class="n">OPAL_PLATFORM_ERR_EVT</span><span class="p">,</span> <span class="n">OPAL_CHIP</span><span class="p">,</span> |
| <span class="n">OPAL_PLATFORM_FIRMWARE</span><span class="p">,</span> <span class="n">OPAL_PREDICTIVE_ERR_GENERAL</span><span class="p">,</span> |
| <span class="n">OPAL_NA</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>The various attributes set by this macro are described below.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">uint8_t</span> <span class="pre">opal_error_event_type</span></code>: Classification of error/events |
| type reported on OPAL.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">/*</span> <span class="n">Platform</span> <span class="n">Events</span><span class="o">/</span><span class="n">Errors</span><span class="p">:</span> <span class="n">Report</span> <span class="n">Machine</span> <span class="n">Check</span> <span class="n">Interrupt</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PLATFORM_ERR_EVT 0x01</span> |
| <span class="o">/*</span> <span class="n">INPUT_OUTPUT</span><span class="p">:</span> <span class="n">Report</span> <span class="nb">all</span> <span class="n">I</span><span class="o">/</span><span class="n">O</span> <span class="n">related</span> <span class="n">events</span><span class="o">/</span><span class="n">errors</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_INPUT_OUTPUT_ERR_EVT 0x02</span> |
| <span class="o">/*</span> <span class="n">RESOURCE_DEALLOC</span><span class="p">:</span> <span class="n">Hotplug</span> <span class="n">events</span> <span class="ow">and</span> <span class="n">errors</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_RESOURCE_DEALLOC_ERR_EVT 0x03</span> |
| <span class="o">/*</span> <span class="n">MISC</span><span class="p">:</span> <span class="n">Miscellaneous</span> <span class="n">error</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_MISC_ERR_EVT 0x04</span> |
| </pre></div> |
| </div> |
| <p><code class="docutils literal notranslate"><span class="pre">uint16_t</span> <span class="pre">component_id</span></code>: Component ID of OPAL component as |
| listed in <code class="docutils literal notranslate"><span class="pre">include/errorlog.h</span></code>.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">uint8_t</span> <span class="pre">subsystem_id</span></code>: ID of the sub-system reporting error.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">/*</span> <span class="n">OPAL</span> <span class="n">Subsystem</span> <span class="n">IDs</span> <span class="n">listed</span> <span class="k">for</span> <span class="n">reporting</span> <span class="n">events</span><span class="o">/</span><span class="n">errors</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PROCESSOR_SUBSYSTEM 0x10</span> |
| <span class="c1">#define OPAL_MEMORY_SUBSYSTEM 0x20</span> |
| <span class="c1">#define OPAL_IO_SUBSYSTEM 0x30</span> |
| <span class="c1">#define OPAL_IO_DEVICES 0x40</span> |
| <span class="c1">#define OPAL_CEC_HARDWARE 0x50</span> |
| <span class="c1">#define OPAL_POWER_COOLING 0x60</span> |
| <span class="c1">#define OPAL_MISC 0x70</span> |
| <span class="c1">#define OPAL_SURVEILLANCE_ERR 0x7A</span> |
| <span class="c1">#define OPAL_PLATFORM_FIRMWARE 0x80</span> |
| <span class="c1">#define OPAL_SOFTWARE 0x90</span> |
| <span class="c1">#define OPAL_EXTERNAL_ENV 0xA0</span> |
| </pre></div> |
| </div> |
| <p><code class="docutils literal notranslate"><span class="pre">uint8_t</span> <span class="pre">event_severity</span></code>: Severity of the event/error to be reported.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1">#define OPAL_INFO 0x00</span> |
| <span class="c1">#define OPAL_RECOVERED_ERR_GENERAL 0x10</span> |
| |
| <span class="o">/*</span> <span class="mh">0x2</span><span class="n">X</span> <span class="n">series</span> <span class="ow">is</span> <span class="n">to</span> <span class="n">denote</span> <span class="nb">set</span> <span class="n">of</span> <span class="n">Predictive</span> <span class="n">Error</span> <span class="o">*/</span> |
| <span class="o">/*</span> <span class="mh">0x20</span> <span class="n">Generic</span> <span class="n">predictive</span> <span class="n">error</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PREDICTIVE_ERR_GENERAL 0x20</span> |
| <span class="o">/*</span> <span class="mh">0x21</span> <span class="n">Predictive</span> <span class="n">error</span><span class="p">,</span> <span class="n">degraded</span> <span class="n">performance</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PREDICTIVE_ERR_DEGRADED_PERF 0x21</span> |
| <span class="o">/*</span> <span class="mh">0x22</span> <span class="n">Predictive</span> <span class="n">error</span><span class="p">,</span> <span class="n">fault</span> <span class="n">may</span> <span class="n">be</span> <span class="n">corrected</span> <span class="n">after</span> <span class="n">reboot</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PREDICTIVE_ERR_FAULT_RECTIFY_REBOOT 0x22</span> |
| <span class="o">/*</span> |
| <span class="o">*</span> <span class="mh">0x23</span> <span class="n">Predictive</span> <span class="n">error</span><span class="p">,</span> <span class="n">fault</span> <span class="n">may</span> <span class="n">be</span> <span class="n">corrected</span> <span class="n">after</span> <span class="n">reboot</span><span class="p">,</span> |
| <span class="o">*</span> <span class="n">degraded</span> <span class="n">performance</span> |
| <span class="o">*/</span> |
| <span class="c1">#define OPAL_PREDICTIVE_ERR_FAULT_RECTIFY_BOOT_DEGRADE_PERF 0x23</span> |
| <span class="o">/*</span> <span class="mh">0x24</span> <span class="n">Predictive</span> <span class="n">error</span><span class="p">,</span> <span class="n">loss</span> <span class="n">of</span> <span class="n">redundancy</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_PREDICTIVE_ERR_LOSS_OF_REDUNDANCY 0x24</span> |
| |
| <span class="o">/*</span> <span class="mh">0x4</span><span class="n">X</span> <span class="n">series</span> <span class="k">for</span> <span class="n">Unrecoverable</span> <span class="n">Error</span> <span class="o">*/</span> |
| <span class="o">/*</span> <span class="mh">0x40</span> <span class="n">Generic</span> <span class="n">Unrecoverable</span> <span class="n">error</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_UNRECOVERABLE_ERR_GENERAL 0x40</span> |
| <span class="o">/*</span> <span class="mh">0x41</span> <span class="n">Unrecoverable</span> <span class="n">error</span> <span class="n">bypassed</span> <span class="k">with</span> <span class="n">degraded</span> <span class="n">performance</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_UNRECOVERABLE_ERR_DEGRADE_PERF 0x41</span> |
| <span class="o">/*</span> <span class="mh">0x44</span> <span class="n">Unrecoverable</span> <span class="n">error</span> <span class="n">bypassed</span> <span class="k">with</span> <span class="n">loss</span> <span class="n">of</span> <span class="n">redundancy</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_UNRECOVERABLE_ERR_LOSS_REDUNDANCY 0x44</span> |
| <span class="o">/*</span> <span class="mh">0x45</span> <span class="n">Unrecoverable</span> <span class="n">error</span> <span class="n">bypassed</span> <span class="k">with</span> <span class="n">loss</span> <span class="n">of</span> <span class="n">redundancy</span> |
| <span class="o">*</span> <span class="ow">and</span> <span class="n">performance</span> |
| <span class="o">*/</span> |
| <span class="c1">#define OPAL_UNRECOVERABLE_ERR_LOSS_REDUNDANCY_PERF 0x45</span> |
| <span class="o">/*</span> <span class="mh">0x48</span> <span class="n">Unrecoverable</span> <span class="n">error</span> <span class="n">bypassed</span> <span class="k">with</span> <span class="n">loss</span> <span class="n">of</span> <span class="n">function</span> <span class="o">*/</span> |
| <span class="c1">#define OPAL_UNRECOVERABLE_ERR_LOSS_OF_FUNCTION 0x48</span> |
| |
| <span class="c1">#define OPAL_ERROR_PANIC 0x50</span> |
| </pre></div> |
| </div> |
| <p><code class="docutils literal notranslate"><span class="pre">uint8_t</span>  <span class="pre">event_subtype</span></code>: Event Sub-type</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1">#define OPAL_NA 0x00</span> |
| <span class="c1">#define OPAL_MISCELLANEOUS_INFO_ONLY 0x01</span> |
| <span class="c1">#define OPAL_PREV_REPORTED_ERR_RECTIFIED 0x10</span> |
| <span class="c1">#define OPAL_SYS_RESOURCES_DECONFIG_BY_USER 0x20</span> |
| <span class="c1">#define OPAL_SYS_RESOURCE_DECONFIG_PRIOR_ERR 0x21</span> |
| <span class="c1">#define OPAL_RESOURCE_DEALLOC_EVENT_NOTIFY 0x22</span> |
| <span class="c1">#define OPAL_CONCURRENT_MAINTENANCE_EVENT 0x40</span> |
| <span class="c1">#define OPAL_CAPACITY_UPGRADE_EVENT 0x60</span> |
| <span class="c1">#define OPAL_RESOURCE_SPARING_EVENT 0x70</span> |
| <span class="c1">#define OPAL_DYNAMIC_RECONFIG_EVENT 0x80</span> |
| <span class="c1">#define OPAL_NORMAL_SYS_PLATFORM_SHUTDOWN 0xD0</span> |
| <span class="c1">#define OPAL_ABNORMAL_POWER_OFF 0xE0</span> |
| </pre></div> |
| </div> |
| <dl> |
| <dt><code class="docutils literal notranslate"><span class="pre">uint8_t</span> <span class="pre">opal_srctype</span></code>: SRC type, value should be OPAL_SRC_TYPE_ERROR.</dt><dd><p>SRC refers to System Reference Code. |
| It is 4 byte hexa-decimal number that reflects the |
| current system state. |
| Eg: BB821010,</p> |
| <ul class="simple"> |
| <li><p>1st byte -> BB -> SRC Type</p></li> |
| <li><p>2nd byte -> 82 -> Subsystem</p></li> |
| <li><p>3rd, 4th byte -> Component ID and Reason Code</p></li> |
| </ul> |
| <p>SRC needs to be generated on the fly depending on the state |
| of the system. All the parameters needed to generate a SRC |
| should be provided during reporting of an event/error.</p> |
| </dd> |
| <dt><code class="docutils literal notranslate"><span class="pre">uint32_t</span> <span class="pre">reason_code</span></code>: Reason for failure as stated in <code class="docutils literal notranslate"><span class="pre">include/errorlog.h</span></code> for OPAL.</dt><dd><p>Eg: Reason code for code-update failures can be</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">OPAL_RC_CU_INIT</span></code> -> Initialisation failure</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">OPAL_RC_CU_FLASH</span></code> -> Flash failure</p></li> |
| </ul> |
| </dd> |
| </dl> |
| </div></blockquote> |
| <dl> |
| <dt>Step 2: Data can be appended to the user data section using the either of</dt><dd><p>the below two interfaces:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">void</span> <span class="n">log_append_data</span><span class="p">(</span><span class="n">struct</span> <span class="n">errorlog</span> <span class="o">*</span><span class="n">buf</span><span class="p">,</span> <span class="n">unsigned</span> <span class="n">char</span> <span class="o">*</span><span class="n">data</span><span class="p">,</span> |
| <span class="n">uint16_t</span> <span class="n">size</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| </dd> |
| </dl> |
| <p>Parameters:</p> |
| <blockquote> |
| <div><p><code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">opal_errorlog</span> <span class="pre">*buf</span></code>: <code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">opal_errorlog</span></code> pointer |
| returned by <code class="docutils literal notranslate"><span class="pre">opal_elog_create()</span></code> call.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">char</span> <span class="pre">*data</span></code>: Pointer to the dump data</p> |
| <p><code class="docutils literal notranslate"><span class="pre">uint16_t</span> <span class="pre">size</span></code>: Size of the dump data.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">void</span> <span class="pre">log_append_msg(struct</span> <span class="pre">errorlog</span> <span class="pre">*buf,</span> <span class="pre">const</span> <span class="pre">char</span> <span class="pre">*fmt,</span> <span class="pre">...);</span></code></p> |
| </div></blockquote> |
| <p>Parameters:</p> |
| <blockquote> |
| <div><p><code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">opal_errorlog</span> <span class="pre">*buf</span></code>: pointer returned by <code class="docutils literal notranslate"><span class="pre">opal_elog_create()</span></code> |
| call.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">const</span> <span class="pre">char</span> <span class="pre">*fmt</span></code>: Formatted error log string.</p> |
| <p>Additional user data sections can be added to the error log to |
| separate data (eg. readable text vs binary data) by calling |
| <code class="docutils literal notranslate"><span class="pre">log_add_section()</span></code>. The interfaces in Step 2 operate on the ‘last’ |
| user data section of the error log.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">void</span> <span class="pre">log_add_section(struct</span> <span class="pre">errorlog</span> <span class="pre">*buf,</span> <span class="pre">uint32_t</span> <span class="pre">tag);</span></code></p> |
| </div></blockquote> |
| <p>Parameters:</p> |
| <blockquote> |
| <div><p><code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">opal_errorlog</span> <span class="pre">*buf</span></code>: pointer returned by <code class="docutils literal notranslate"><span class="pre">opal_elog_create()</span></code> call.</p> |
| <dl class="simple"> |
| <dt><code class="docutils literal notranslate"><span class="pre">uint32_t</span> <span class="pre">tag</span></code>: Unique value to identify the data.</dt><dd><p>Ideal to have ASCII value for 4-byte string.</p> |
| </dd> |
| </dl> |
| </div></blockquote> |
| <dl> |
| <dt>Step 3: There is a platform hook for the OPAL error log to be committed on any</dt><dd><p>service processor(Currently used for FSP and BMC based machines).</p> |
| <p>Below is snippet of the code of how this hook is called.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">void</span> <span class="n">log_commit</span><span class="p">(</span><span class="n">struct</span> <span class="n">errorlog</span> <span class="o">*</span><span class="n">elog</span><span class="p">)</span> |
| <span class="p">{</span> |
| <span class="o">....</span> |
| <span class="o">....</span> |
| <span class="k">if</span> <span class="p">(</span><span class="n">platform</span><span class="o">.</span><span class="n">elog_commit</span><span class="p">)</span> <span class="p">{</span> |
| <span class="n">rc</span> <span class="o">=</span> <span class="n">platform</span><span class="o">.</span><span class="n">elog_commit</span><span class="p">(</span><span class="n">elog</span><span class="p">);</span> |
| <span class="k">if</span> <span class="p">(</span><span class="n">rc</span><span class="p">)</span> |
| <span class="n">prerror</span><span class="p">(</span><span class="s2">"ELOG: Platform commit error </span><span class="si">%d</span><span class="s2">"</span> |
| <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">,</span> <span class="n">rc</span><span class="p">);</span> |
| <span class="k">return</span><span class="p">;</span> |
| <span class="p">}</span> |
| <span class="o">....</span> |
| <span class="o">....</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| </dd> |
| <dt>Step 3.1 FSP:</dt><dd><div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">.</span><span class="n">elog_commit</span> <span class="o">=</span> <span class="n">elog_fsp_commit</span> |
| </pre></div> |
| </div> |
| <p>Once all the data for an error is logged in, the error needs to |
| be committed in FSP.</p> |
| <p>In the process of committing an error to FSP, log info is first |
| internally converted to PEL format and then pushed to the FSP. |
| FSP then take cares of sending all logs including its own and |
| OPAL’s one to the POWERNV.</p> |
| <p>OPAL maintains timeout field for all error logs it is sending to |
| FSP. If it is not logged within allotted time period (e.g if FSP |
| is down), in that case OPAL sends those logs to POWERNV.</p> |
| </dd> |
| <dt>Step 3.2 BMC:</dt><dd><div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">.</span><span class="n">elog_commit</span> <span class="o">=</span> <span class="n">ipmi_elog_commit</span> |
| </pre></div> |
| </div> |
| <p>In case of BMC machines, error logs are first converted to eSEL format. |
| i.e:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">eSEL</span> <span class="o">=</span> <span class="n">SEL</span> <span class="n">header</span> <span class="o">+</span> <span class="n">PEL</span> <span class="n">data</span> |
| </pre></div> |
| </div> |
| <p>SEL header contains below fields.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">struct</span> <span class="n">sel_header</span> <span class="p">{</span> |
| <span class="n">uint16_t</span> <span class="nb">id</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">record_type</span><span class="p">;</span> |
| <span class="n">uint32_t</span> <span class="n">timestamp</span><span class="p">;</span> |
| <span class="n">uint16_t</span> <span class="n">genid</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">evmrev</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">sensor_type</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">sensor_num</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">dir_type</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">signature</span><span class="p">;</span> |
| <span class="n">uint8_t</span> <span class="n">reserved</span><span class="p">[</span><span class="mi">2</span><span class="p">];</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>After filling up the SEL header fields, OPAL copies the error log |
| PEL data after the header section in the error log buffer. Then using |
| IPMI interface, eSEL gets logged in BMC.</p> |
| </dd> |
| </dl> |
| <p>If the user does not intend to dump various user data sections, but just |
| log the error with some amount of description around that error, they can do |
| so using just the simple error logging interface.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">log_simple_error</span><span class="p">(</span><span class="n">uint32_t</span> <span class="n">reason_code</span><span class="p">,</span> <span class="n">char</span> <span class="o">*</span><span class="n">fmt</span><span class="p">,</span> <span class="o">...</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>For example:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">log_simple_error</span><span class="p">(</span><span class="n">OPAL_RC_SURVE_STATUS</span><span class="p">,</span> |
| <span class="s2">"SURV: Error retrieving surveillance status: </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</span><span class="p">,</span> |
| <span class="n">err_len</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>Using the reason code, an error log is generated with the information derived |
| from the look-up table, populated and committed to service processor. All of it |
| is done with just one call.</p> |
| </section> |
| </section> |
| <section id="error-logging-retrieval-from-fsp"> |
| <h1>Error logging retrieval from FSP:<a class="headerlink" href="#error-logging-retrieval-from-fsp" title="Link to this heading">¶</a></h1> |
| <p>FSP sends error log notification to OPAL via mailbox protocol.</p> |
| <p>OPAL maintains below lists:</p> |
| <ul class="simple"> |
| <li><p>Free list : List of free nodes.</p></li> |
| <li><p>Pending list : List of nodes which is yet to be read by the POWERNV.</p></li> |
| <li><p>Processed list : List of nodes which has been read but still waiting for |
| acknowledgement.</p></li> |
| </ul> |
| <p>Below is the structure of the node:</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">struct</span> <span class="n">fsp_log_entry</span> <span class="p">{</span> |
| <span class="n">uint32_t</span> <span class="n">log_id</span><span class="p">;</span> |
| <span class="n">size_t</span> <span class="n">log_size</span><span class="p">;</span> |
| <span class="n">struct</span> <span class="n">list_node</span> <span class="n">link</span><span class="p">;</span> |
| <span class="p">};</span> |
| </pre></div> |
| </div> |
| <p>OPAL maintains a state machine which has following states.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">enum</span> <span class="n">elog_head_state</span> <span class="p">{</span> |
| <span class="n">ELOG_STATE_FETCHING</span><span class="p">,</span> <span class="o">/*</span><span class="n">In</span> <span class="n">the</span> <span class="n">process</span> <span class="n">of</span> <span class="n">reading</span> <span class="n">log</span> <span class="kn">from</span> <span class="nn">FSP.</span> <span class="o">*/</span> |
| <span class="n">ELOG_STATE_FETCHED_INFO</span><span class="p">,</span><span class="o">/*</span> <span class="n">Indicates</span> <span class="n">reading</span> <span class="n">log</span> <span class="n">info</span> <span class="ow">is</span> <span class="n">completed</span> <span class="o">*/</span> |
| <span class="n">ELOG_STATE_FETCHED_DATA</span><span class="p">,</span><span class="o">/*</span> <span class="n">Indicates</span> <span class="n">reading</span> <span class="n">log</span> <span class="ow">is</span> <span class="n">completed</span> <span class="o">*/</span> |
| <span class="n">ELOG_STATE_HOST_INFO</span><span class="p">,</span> <span class="o">/*</span> <span class="n">Host</span> <span class="n">read</span> <span class="n">log</span> <span class="n">info</span> <span class="o">*/</span> |
| <span class="n">ELOG_STATE_NONE</span><span class="p">,</span> <span class="o">/*</span> <span class="n">Indicates</span> <span class="n">to</span> <span class="n">fetch</span> <span class="nb">next</span> <span class="n">log</span> <span class="o">*/</span> |
| <span class="n">ELOG_STATE_REJECTED</span><span class="p">,</span> <span class="o">/*</span> <span class="n">resend</span> <span class="nb">all</span> <span class="n">pending</span> <span class="n">logs</span> <span class="n">to</span> <span class="n">linux</span> <span class="o">*/</span> |
| <span class="p">};</span> |
| </pre></div> |
| </div> |
| <p>Initially, state of the state machine is <code class="docutils literal notranslate"><span class="pre">ELOG_STATE_NONE</span></code>. When OPAL gets |
| the notification about the error log, it takes out the node from free list |
| and put it into pending list and update the state machine to fetching state |
| (<code class="docutils literal notranslate"><span class="pre">ELOG_STATE_FETCHING</span></code>). It also gives response back to FSP about the |
| received error log notification.</p> |
| <p>It then queue mailbox message to get the error log data in OPAL error log |
| buffer, once it is done state machine gets into fetched state |
| (<code class="docutils literal notranslate"><span class="pre">ELOG_STATE_FETCHED_DATA</span></code>). After that, OPAL notifies POWERNV host to |
| fetch new error log.</p> |
| <p>POWERNV uses the OPAL interface to get the error log info(elogid, elog_size, |
| elog_type) first then it reads the error log data in its buffer that moves |
| the pending error log to processed list. After reading, the state machine |
| moves to <code class="docutils literal notranslate"><span class="pre">ELOG_STATE_NONE</span></code> state.</p> |
| <p>It acknowledges the error log id after reading error log data by sending the |
| call to OPAL, which in turn sends the acknowledgement mbox message to FSP and |
| moves error log id from processed list to again back to free node list and this |
| process goes on every FSP error log.</p> |
| <section id="design-constraints"> |
| <h2>Design constraints:<a class="headerlink" href="#design-constraints" title="Link to this heading">¶</a></h2> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1">#define ELOG_READ_MAX_RECORD 128</span> |
| </pre></div> |
| </div> |
| <p>Currently, the number of error logs from FSP, OPAL can hold is limited to |
| 128. If OPAL run out of free node in the list for the new error log, it sends |
| ‘Discarded by OPAL’ message to the FSP. At some point in the future, it is |
| upto FSP when it notifies again to OPAL about the discarded error log.</p> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="c1">#define ELOG_WRITE_MAX_RECORD 64</span> |
| </pre></div> |
| </div> |
| <p>There is also limitation on the number of OPAL error logs OPAL can hold is 64. |
| If it is run out of the buffers in the pool, it will log the message saying |
| ‘Failed to get the buffer’.</p> |
| </section> |
| <section id="note"> |
| <h2>Note<a class="headerlink" href="#note" title="Link to this heading">¶</a></h2> |
| <ul class="simple"> |
| <li><p>For more information regarding error logging and PEL format |
| refer to PAPR doc and P7 PEL and SRC PLDD document.</p></li> |
| <li><p>Refer to <code class="docutils literal notranslate"><span class="pre">include/errorlog.h</span></code> for all the error logging |
| interface parameters and <code class="docutils literal notranslate"><span class="pre">include/pel.h</span></code> for PEL |
| structures.</p></li> |
| </ul> |
| </section> |
| <section id="sample-error-logging"> |
| <h2>Sample error logging<a class="headerlink" href="#sample-error-logging" title="Link to this heading">¶</a></h2> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span> <span class="n">DEFINE_LOG_ENTRY</span><span class="p">(</span><span class="n">OPAL_RC_ATTN</span><span class="p">,</span> <span class="n">OPAL_PLATFORM_ERR_EVT</span><span class="p">,</span> <span class="n">OPAL_ATTN</span><span class="p">,</span> |
| <span class="n">OPAL_PLATFORM_FIRMWARE</span><span class="p">,</span> <span class="n">OPAL_PREDICTIVE_ERR_GENERAL</span><span class="p">,</span> |
| <span class="n">OPAL_NA</span><span class="p">);</span> |
| |
| <span class="n">void</span> <span class="n">report_error</span><span class="p">(</span><span class="nb">int</span> <span class="n">index</span><span class="p">)</span> |
| <span class="p">{</span> |
| <span class="n">struct</span> <span class="n">errorlog</span> <span class="o">*</span><span class="n">buf</span><span class="p">;</span> |
| <span class="n">char</span> <span class="n">data1</span><span class="p">[]</span> <span class="o">=</span> <span class="s2">"This is a sample user defined data section1"</span><span class="p">;</span> |
| <span class="n">char</span> <span class="n">data2</span><span class="p">[]</span> <span class="o">=</span> <span class="s2">"Error logging sample. These are dummy errors. Section 2"</span><span class="p">;</span> |
| <span class="n">char</span> <span class="n">data3</span><span class="p">[]</span> <span class="o">=</span> <span class="s2">"Sample error Sample error Sample error Sample error </span><span class="se">\</span> |
| <span class="s2"> Sample error abcdefghijklmnopqrstuvwxyz"</span><span class="p">;</span> |
| <span class="nb">int</span> <span class="n">tag</span><span class="p">;</span> |
| |
| <span class="n">printf</span><span class="p">(</span><span class="s2">"ELOG: In machine check report error index: </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</span><span class="p">,</span> <span class="n">index</span><span class="p">);</span> |
| |
| <span class="o">/*</span> <span class="n">To</span> <span class="n">report</span> <span class="n">an</span> <span class="n">error</span><span class="p">,</span> <span class="n">create</span> <span class="n">an</span> <span class="n">error</span> <span class="n">log</span> <span class="k">with</span> <span class="n">relevant</span> <span class="n">information</span> |
| <span class="o">*</span> <span class="n">opal_elog_create</span><span class="p">()</span><span class="o">.</span> <span class="n">Call</span> <span class="n">returns</span> <span class="n">a</span> <span class="n">pre</span><span class="o">-</span><span class="n">allocated</span> <span class="n">buffer</span> <span class="n">of</span> <span class="nb">type</span> |
| <span class="o">*</span> <span class="s1">'struct errorlog'</span> <span class="n">buffer</span> <span class="k">with</span> <span class="n">relevant</span> <span class="n">fields</span> <span class="n">updated</span><span class="o">.</span> |
| <span class="o">*/</span> |
| |
| <span class="o">/*</span> <span class="n">tag</span> <span class="o">-></span> <span class="n">unique</span> <span class="n">ascii</span> <span class="n">tag</span> <span class="n">to</span> <span class="n">identify</span> <span class="n">a</span> <span class="n">particular</span> <span class="n">data</span> <span class="n">dump</span> <span class="n">section</span> <span class="o">*/</span> |
| <span class="n">tag</span> <span class="o">=</span> <span class="mh">0x4b4b4b4b</span><span class="p">;</span> |
| <span class="n">buf</span> <span class="o">=</span> <span class="n">opal_elog_create</span><span class="p">(</span><span class="o">&</span><span class="n">e_info</span><span class="p">(</span><span class="n">OPAL_RC_ATTN</span><span class="p">),</span> <span class="n">tag</span><span class="p">);</span> |
| <span class="k">if</span> <span class="p">(</span><span class="n">buf</span> <span class="o">==</span> <span class="n">NULL</span><span class="p">)</span> <span class="p">{</span> |
| <span class="n">printf</span><span class="p">(</span><span class="s2">"ELOG: Error getting buffer.</span><span class="se">\n</span><span class="s2">"</span><span class="p">);</span> |
| <span class="k">return</span><span class="p">;</span> |
| <span class="p">}</span> |
| |
| <span class="o">/*</span> <span class="n">Append</span> <span class="n">data</span> <span class="ow">or</span> <span class="n">text</span> <span class="k">with</span> <span class="n">log_append_data</span><span class="p">()</span> <span class="ow">or</span> <span class="n">log_append_msg</span><span class="p">()</span> <span class="o">*/</span> |
| <span class="n">log_append_data</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">data1</span><span class="p">,</span> <span class="n">sizeof</span><span class="p">(</span><span class="n">data1</span><span class="p">));</span> |
| |
| <span class="o">/*</span> <span class="n">In</span> <span class="n">case</span> <span class="n">of</span> <span class="n">user</span> <span class="n">wanting</span> <span class="n">to</span> <span class="n">add</span> <span class="n">multiple</span> <span class="n">sections</span> <span class="n">of</span> <span class="n">various</span> <span class="n">dump</span> <span class="n">data</span> |
| <span class="o">*</span> <span class="k">for</span> <span class="n">better</span> <span class="n">debug</span><span class="p">,</span> <span class="n">data</span> <span class="n">sections</span> <span class="n">can</span> <span class="n">be</span> <span class="n">added</span> <span class="n">using</span> <span class="n">this</span> <span class="n">interface</span> |
| <span class="o">*</span> <span class="n">void</span> <span class="n">log_add_section</span><span class="p">(</span><span class="n">struct</span> <span class="n">errorlog</span> <span class="o">*</span><span class="n">buf</span><span class="p">,</span> <span class="n">uint32_t</span> <span class="n">tag</span><span class="p">);</span> |
| <span class="o">*/</span> |
| <span class="n">tag</span> <span class="o">=</span> <span class="mh">0x4c4c4c4c</span><span class="p">;</span> |
| <span class="n">log_add_section</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">tag</span><span class="p">);</span> |
| <span class="n">log_append_data</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">data2</span><span class="p">,</span> <span class="n">sizeof</span><span class="p">(</span><span class="n">data2</span><span class="p">));</span> |
| <span class="n">log_append_data</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span> <span class="n">data3</span><span class="p">,</span> <span class="n">sizeof</span><span class="p">(</span><span class="n">data3</span><span class="p">));</span> |
| |
| <span class="o">/*</span> <span class="n">Once</span> <span class="nb">all</span> <span class="n">info</span> <span class="ow">is</span> <span class="n">updated</span><span class="p">,</span> <span class="n">ready</span> <span class="n">to</span> <span class="n">be</span> <span class="n">sent</span> <span class="n">to</span> <span class="n">FSP</span> <span class="o">*/</span> |
| <span class="n">printf</span><span class="p">(</span><span class="s2">"ELOG:commit to FSP</span><span class="se">\n</span><span class="s2">"</span><span class="p">);</span> |
| <span class="n">log_commit</span><span class="p">(</span><span class="n">buf</span><span class="p">);</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| </section> |
| <section id="sample-output-pel-dump-got-from-fsp"> |
| <h2>Sample output PEL dump got from FSP<a class="headerlink" href="#sample-output-pel-dump-got-from-fsp" title="Link to this heading">¶</a></h2> |
| <div class="highlight-default notranslate"><div class="highlight"><pre><span></span>$ errl -d -x 0x533C9B37 |
| | 00000000 50480030 01004154 20150728 02000500 PH.0..AT ..(.... | |
| | 00000010 20150728 02000566 4B000107 00000000 ..(...fK....... | |
| | 00000020 00000000 00000000 B0000002 533C9B37 ............S..7 | |
| | 00000030 55480018 01004154 80002000 00000000 UH....AT.. ..... | |
| | 00000040 00002000 01005300 50530050 01004154 .. ...S.PS.P..AT | |
| | 00000050 02000008 00000048 00000080 00000000 .......H........ | |
| | 00000060 00000000 00000000 00000000 00000000 ................ | |
| | 00000070 00000000 00000000 42423832 31343130 ........BB821410 | |
| | 00000080 20202020 20202020 20202020 20202020 | |
| | 00000090 20202020 20202020 4548004C 01004154 EH.L..AT | |
| | 000000A0 38323836 2D343241 31303738 34415400 8286-42A10784AT. | |
| | 000000B0 00000000 00000000 00000000 00000000 ................ | |
| | 000000C0 00000000 00000000 00000000 00000000 ................ | |
| | 000000D0 00000000 00000000 20150728 02000500 ........ ..(.... | |
| | 000000E0 00000000 4D54001C 01004154 38323836 ....MT....AT8286 | |
| | 000000F0 2D343241 31303738 34415400 00000000 -42A10784AT..... | |
| | 00000100 5544003C 01004154 4B4B4B4B 00340000 UD....ATKKKK.4.. | |
| | 00000110 54686973 20697320 61207361 6D706C65 This is a sample | |
| | 00000120 20757365 72206465 66696E65 64206461 user defined da | |
| | 00000130 74612073 65637469 6F6E3100 554400A7 ta section1.UD.. | |
| | 00000140 01004154 4C4C4C4C 009F0000 4572726F ..ATLLLL....Erro | |
| | 00000150 72206C6F 6767696E 67207361 6D706C65 r logging sample | |
| | 00000160 2E205468 65736520 61726520 64756D6D . These are dumm | |
| | 00000170 79206572 726F7273 2E205365 6374696F y errors. Sectio | |
| | 00000180 6E203200 53616D70 6C652065 72726F72 n 2.Sample error | |
| | 00000190 2053616D 706C6520 6572726F 72205361 Sample error Sa | |
| | 000001A0 6D706C65 20657272 6F722053 616D706C mple error Sampl | |
| | 000001B0 65206572 726F7220 09090953 616D706C e error ...Sampl | |
| | 000001C0 65206572 726F7220 61626364 65666768 e error abcdefgh | |
| | 000001D0 696A6B6C 6D6E6F70 71727374 75767778 ijklmnopqrstuvwx | |
| | 000001E0 797A00 yz. | |
| |------------------------------------------------------------------------------| |
| | Platform Event Log - 0x533C9B37 | |
| |------------------------------------------------------------------------------| |
| | Private Header | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | Created at : 07/28/2015 02:00:05 | |
| | Committed at : 07/28/2015 02:00:05 | |
| | Creator Subsystem : OPAL | |
| | CSSVER : | |
| | Platform Log Id : 0xB0000002 | |
| | Entry Id : 0x533C9B37 | |
| | Total Log Size : 483 | |
| |------------------------------------------------------------------------------| |
| | User Header | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Log Committed by : 4154 | |
| | Subsystem : Platform Firmware | |
| | Event Scope : Unknown - 0x00000000 | |
| | Event Severity : Predictive Error | |
| | Event Type : Not Applicable | |
| | Return Code : 0x00000000 | |
| | Action Flags : Report Externally | |
| | Action Status : Sent to Hypervisor | |
| |------------------------------------------------------------------------------| |
| | Primary System Reference Code | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | SRC Format : 0x80 | |
| | SRC Version : 0x02 | |
| | Virtual Progress SRC : False | |
| | I5/OS Service Event Bit : False | |
| | Hypervisor Dump Initiated: False | |
| | Power Control Net Fault : False | |
| | | |
| | Valid Word Count : 0x08 | |
| | Reference Code : BB821410 | |
| | Hex Words 2 - 5 : 00000080 00000000 00000000 00000000 | |
| | Hex Words 6 - 9 : 00000000 00000000 00000000 00000000 | |
| | | |
| |------------------------------------------------------------------------------| |
| | Extended User Header | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | Reporting Machine Type : 8286-42A | |
| | Reporting Serial Number : 10784AT | |
| | FW Released Ver : | |
| | FW SubSys Version : | |
| | Common Ref Time : 07/28/2015 02:00:05 | |
| | Symptom Id Len : 0 | |
| | Symptom Id : | |
| |------------------------------------------------------------------------------| |
| | Machine Type/Model & Serial Number | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | Machine Type Model : 8286-42A | |
| | Serial Number : 10784AT | |
| |------------------------------------------------------------------------------| |
| | User Defined Data | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | | |
| | 00000000 4B4B4B4B 00340000 54686973 20697320 KKKK.4..This is | |
| | 00000010 61207361 6D706C65 20757365 72206465 a sample user de | |
| | 00000020 66696E65 64206461 74612073 65637469 fined data secti | |
| | 00000030 6F6E3100 on1. | |
| | | |
| |------------------------------------------------------------------------------| |
| | User Defined Data | |
| |------------------------------------------------------------------------------| |
| | Section Version : 1 | |
| | Sub-section type : 0 | |
| | Created by : 4154 | |
| | | |
| | 00000000 4C4C4C4C 009F0000 4572726F 72206C6F LLLL....Error lo | |
| | 00000010 6767696E 67207361 6D706C65 2E205468 gging sample. Th | |
| | 00000020 65736520 61726520 64756D6D 79206572 ese are dummy er | |
| | 00000030 726F7273 2E205365 6374696F 6E203200 rors. Section 2. | |
| | 00000040 53616D70 6C652065 72726F72 2053616D Sample error Sam | |
| | 00000050 706C6520 6572726F 72205361 6D706C65 ple error Sample | |
| | 00000060 20657272 6F722053 616D706C 65206572 error Sample er | |
| | 00000070 726F7220 09090953 616D706C 65206572 ror ...Sample er | |
| | 00000080 726F7220 61626364 65666768 696A6B6C ror abcdefghijkl | |
| | 00000090 6D6E6F70 71727374 75767778 797A00 mnopqrstuvwxyz. | |
| | | |
| |------------------------------------------------------------------------------| |
| </pre></div> |
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| <li><a class="reference internal" href="#sample-error-logging">Sample error logging</a></li> |
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