How to Troubleshoot Linux Kernel Modem Configuration

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</p> <nav aria-label="Top navigation"> <p> Linux kernel</p> </nav> <div> <div> <div itemscope="itemscope" itemtype="" role="main"> <div itemprop="itemBody"> <div> <p>This document presents know-how on the MHI protocol.</p> <div> <h2 id="10">Preview¶</h2> <p>MHI is a well developed protocol by Qualcomm Innovation Center, Inc.<br /> With the ability to control processors and communicate through high-speed modern devices<br /> A fast device with a shared memory bus. Although MHI can be configured<br /> For any school, peripherals are mainly used among PCIe based devices. IMC<br /> provides logical waterways on the physical provides and bus transport<br /> Modem protocols such as <a href="">Webmondo</a> control messages, IP data packets, and<br /> Diagnostics covering at least one of these types of logical channels. Also OMC<br /> The protocol has a data acknowledgment function and manages that this is a power state<br /> Modems and/or other logical channel. Internals¶</h2> <div> <h3 id="11">MMIO¶</h3> <p>MMIO</p> </div> <div> <h2>mhi (Memory Mapped IO) consists of a set of hardware registers,<br /> which are mapped from the peripheral bus space to the host callback similar to PCIe.<br /> Here are the main components of the MMIO register space:</p> <p>MHI access logs: control to MHI configuration registers</p> <p>MHI BHI Logs: The BHI (boot host interface) registers are actually used by the host.<br /> upload someone’s firmware to before device initialization MHI.Channel </p> <p>doorbell array: doorbell channel registers, (db) used by host<br /> Notify the device when there are almost certainly new tasks to perform.</p> <p>Event doorbell array: Doorbell register connected to the event context array<br /> (db) are used by some hosts for current events notification device<br /> available.debug: </p> <p>Register The register defined below and the counters used to grant access to the device.<br /> A container for debugging information, such as the stability of features appropriate for the host.</p> </div> <div> <h3>Data structure structures¶</h3> <p>All data shared by MHI, reside in the memory of the main host system. Usage<br /> physical interface, the element accesses these data structures. MHI others and data<br /> Structures Data buffers are provided in memory areas of the learning host.<br /> device.</p> <p>Channel Array: A context arranges all the channel controls that are in a data channel.<br /> Context table.</p> <p>Broadcast rings: used by the host to schedule work items. in<br /> Transmission rings are how a complete circular queue of descriptors (TD) is organized.</p> <p>Event context array: All event configurations are neatly organized.<br /> Data array event context.</p> <p>Event tones: used by the device so that you can send completion messages about actions and state transitions.<br /> host</p> <p>Command context All tables: keep control of configurations organized in a team<br /> Table of contextual documents.</p> <p>Command ringtones: used by the host or host to send MHI commands to the device. Are these orders organized?<br /> ringing like a cyclic command queuedescriptor (CD).</p> </div> <div> <h3 id="13">Lines¶</h3> <p>MHI links are logical one-way data links between host, device, and critical devices.<br /> The concept in mhi channels is similar to USB.MHI endpoints supported by 256 for<br /> with channels. However, individual device implementations can support as much as possible<br /> the smallest number of threads allowed.</p> <p>Two unidirectional channels with their associated cable trays form<br /> bidirectional line, data that unfortunately can be used by higher level protocols<br /> transport application data boxes (such as IP packets, control cable box messages,<br /> diagnostic messages, etc.). Each is linked to One mode to only<br /> Transfer ring.</p> </div> <div> <h3 id="14">Transmission Rings¶</h3> <p>Data transfer between the host and the device is organized in accordance with certain rules.<br /> Transmission descriptor (TD) channels. in fact td are controlled by transmission rings.<br /> defines each channel’s relationship between device scope and host<br /> Reminder. TD consist of or one severaltheir ring elements (or transmission units):</p> <div> <div> <pre>[reading pointer (RP)]----------->[ring element] } TD [Record Pointer (WP)]-[Ring Element] - [Ring Element] --------->[ring element] element] </pre> </div> </div> <p>Below [Ring are the main ways to use compression rings:</p> <p><str></p> <li> <p>The host allocates space to store the broadcast ringtone.</p> </li> <li> <p>The host bed sets the underlying read pointer, the pointer, without forgetting the corresponding write pointer<br /> String context.</p> </li> <li> <p>A ring can be considered empty if == rp WP.Est </p> </li> <li> <p>Ring is full +wp when 1 == RP.Specifiers</p> </li> <li> <p>rp after the element to serve my device.</p> </li> <li> <p>If the host has a new buffer to send, it updates the element with a stripe<br /> Buffer info, my WP increments to next element and matrix bus<br /> Linked channel comics.</p> </li> </ul> </div> <div> <h3 id="15">Event Ringtones¶</h3> <p>Node-to-device events can be organized into loop events and defined by a specific event.<br /> Descriptors (ED). Event ringtones are used bydevice for notification of natural disasters, such as<br /> Data transfer completion status, instruction completion status, status and changes<br /> master. Are there multiple EDs located on the host?<br /> memory for o. EDs consist of one or more ring elements (or transmission pointer blocks):</p> <div> <div> <pre>[Read(RP)]----------->[Ring element] } ED [Record Pointer (WP)]-[Ring Element] 1) [ring element] --------->[ring element] [ring element] </pre> </div> </div> <p>The main uses of alliances are shown below:</p> <p><str></p> <li><img src="" style="margin-top:20px; margin-bottom:20px; display: block; margin: 0 auto;" title="" alt="" /> <p>The host allocates memory for the ringtone.</p> </li> <li> <p>The base host sets the read pointer, the peak write pointer, and the corresponding pointer.<br /> String context.</p> </li> <li> <p>Number and device have a copy of the local RP, WP.</p> </li> <li> <p>Ringtone is considered empty (no event to show), WP + RP 1 ==.</p> </li> <li> <p>A ring is considered more complete than an event when RP == WP.</p> </li> <li> <p>When there is a new event that the device has to offer, it updates the ED.<br /> points per rp RP increments, to the additional element And fires, which<br /> interrupt.element¶</h3> <p><img src="" style="margin-top:20px; margin-bottom:20px; width: 50%; height: auto; display: block; margin: 0 auto;" title="" alt="" /></p> <p>Element</p> </li> </ul> </div> <div> <h3>Circular is a circular data structure for transferring one block.<br /> relationship between and host device A. Types of Source Ring Transfer Elements<br /> singles are pointers to the buffer, current buffer size and additional control<br /> Information. Other non-audio element types may only contain a handle and a state.<br /> Information. For single-buffer processes, the descriptor ring consists of<br /> one item. For large multi-buffer operations (e.g. spread and collect)<br /> Elements can certainly be combined to form much more time descriptors.</p> </p></p> <div class='yarpp yarpp-related yarpp-related-website yarpp-related-none yarpp-template-list'> <p>No related posts.</p> </div> </div><!-- .entry-content --> <footer class="entry-meta"> <!-- Post end widget area --> <div class="post-end-widget-area"> </div> <div class="entry-meta-term-single"> <span class="entry-meta-categories"><span class="term-icon"><i class="fa fa-folder-open"></i></span> <a href="" rel="tag">Wireless Router</a>   </span> <div style="float:right;"></div> </div><!-- .entry-meta-term --> </footer><!-- .entry-meta --> </article><!-- #post --> <nav class="nav-single"> <div class="wrapper-navigation-below"> <nav class="navigation post-navigation" aria-label="Posts"> <h2 class="screen-reader-text">Post navigation</h2> <div class="nav-links"><div class="nav-previous"><a href="" rel="prev"><span class="meta-nav"><i class="fa fa-angle-double-left"></i></span> How to Fix Windows Errors</a></div><div class="nav-next"><a href="" rel="next">Microsoft promises more useful error messages in Windows 10 <span class="meta-nav"><i class="fa fa-angle-double-right"></i></span></a></div></div> </nav> </div><!-- .wrapper-navigation-below --> </nav><!-- .nav-single --> <div id="comments" class="comments-area"> <div class="wrapper-form-comments"> </div> </div><!-- #comments .comments-area --> </div><!-- #content --> </div><!-- #primary --> <div id="secondary" class="widget-area" role="complementary"> <aside id="recent-posts-2" class="widget widget_recent_entries"> <h3 class="widget-title"><span class="widget-title-tab">Recent Posts</span></h3> <ul> <li> <a href="">Best way to repair appinfo exe</a> </li> <li> <a href="">The Best Way to Fix Windows Error Problems</a> </li> <li> <a href="">Fix Computer Cache Trends</a> </li> <li> <a href="">bicycle catalog</a> </li> <li> <a href="">Eva Wolfson</a> </li> </ul> </aside><aside id="pages-2" class="widget widget_pages"><h3 class="widget-title"><span class="widget-title-tab">Pages</span></h3> <ul> <li class="page_item page-item-6"><a href="">Contact Us</a></li> <li class="page_item page-item-3"><a href="">Privacy Policy</a></li> </ul> </aside> </div><!-- #secondary --> </div><!-- #main .wrapper --> <footer id="colophon" role="contentinfo"> <hr class="hr-footer" /> <div class="site-info"> <div class="footer-text-left"></div> <div class="footer-text-center"></div> <div class="footer-text-right"></div> </div><!-- .site-info --> <div class="viomag-theme-credits"> Theme <a href="">VioMag</a> by GalussoThemes | Powered by <a href="" title="Semantic Personal Publishing Platform">WordPress</a> </div><!-- .credits-blog-wp --> </footer><!-- #colophon --> <div class="ir-arriba"><i class="fa fa-arrow-up"></i></div> </div><!-- #page --> <script type='text/javascript' src='' id='regenerator-runtime-js'></script> <script type='text/javascript' src='' id='wp-polyfill-js'></script> <script type='text/javascript' id='contact-form-7-js-extra'> /* <![CDATA[ */ var wpcf7 = {"api":{"root":"http:\/\/\/wp-json\/","namespace":"contact-form-7\/v1"}}; /* ]]> */ </script> <script type='text/javascript' src='' id='contact-form-7-js'></script> <script type='text/javascript' src='' id='viomag-navigation-js'></script> <script type='text/javascript' src='' id='viomag-scripts-functions-js'></script> </body> </html>