<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif;"> <p>It's used by the UMD though they read from 0/*/* when reading the RASTER_CONFIG registers (which may be a bug...)</p> <p><br> </p> <p>I only added it because the previous interface was either */*/* or x/y/z (where none are *). Now it supports arbitrary bank selections.</p> <p><br> </p> <p>Tom</p> <br> <br> <div style="color: rgb(0, 0, 0);"> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Christian König <deathsimple@vodafone.de><br> <b>Sent:</b> Tuesday, October 11, 2016 08:30<br> <b>To:</b> StDenis, Tom; Michel Dänzer<br> <b>Cc:</b> amd-gfx@lists.freedesktop.org<br> <b>Subject:</b> Re: [PATCH] drm/amd/amdgpu: Allow broadcast on debugfs read (v2)</font> <div> </div> </div> <div> <div class="moz-cite-prefix">I briefly remember reading in some hardware doc that this actually has a defined behavior.<br> <br> It was something about applying either bit wise "and" or "or" on the resulting bits and returning that to the reader.<br> <br> This way you can check with a single broadcast read if an error occurred or if any of the instances are busy.<br> <br> But if you don't actually use it I suggest to not implement this.<br> <br> Regards,<br> Christian.<br> <br> Am 11.10.2016 um 12:26 schrieb StDenis, Tom:<br> </div> <blockquote type="cite"> <div id="divtagdefaultwrapper" style="font-size:12pt; color:#000000; font-family:Calibri,Arial,Helvetica,sans-serif"> <p>That actually makes sense. It came up because <span>mmPA_SC_RASTER_CONFIG (and _1) are read by libdrm with a selection of 0/*/* for se/sh/instance so I wanted to be able to reproduce that via the debugfs interface for testing.</span></p> <p><span><br> </span></p> <p><span>But ya, if you use the broadcast bit who are you reading from then ... hmm..</span></p> <p><span><br> </span></p> <p><span>Tom</span></p> <br> <br> <div style="color:rgb(0,0,0)"> <div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="x_divRplyFwdMsg" dir="ltr"><font color="#000000" face="Calibri, sans-serif" style="font-size:11pt"><b>From:</b> amd-gfx <a class="moz-txt-link-rfc2396E" href="mailto:amd-gfx-bounces@lists.freedesktop.org"> <amd-gfx-bounces@lists.freedesktop.org></a> on behalf of Michel Dänzer <a class="moz-txt-link-rfc2396E" href="mailto:michel.daenzer@mailbox.org"> <michel.daenzer@mailbox.org></a><br> <b>Sent:</b> Monday, October 10, 2016 23:52<br> <b>To:</b> Tom St Denis<br> <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:amd-gfx@lists.freedesktop.org"> amd-gfx@lists.freedesktop.org</a><br> <b>Subject:</b> Re: [PATCH] drm/amd/amdgpu: Allow broadcast on debugfs read (v2)</font> <div> </div> </div> </div> <font size="2"><span style="font-size:10pt"> <div class="PlainText">On 09/10/16 08:58 PM, Tom St Denis wrote:<br> > Allow any of the se/sh/instance fields to be<br> > specified as a broadcast by submitting 0x3FF.<br> > <br> > (v2) Fix broadcast range checking<br> > <br> > Signed-off-by: Tom St Denis <a class="moz-txt-link-rfc2396E" href="mailto:tom.stdenis@amd.com"> <tom.stdenis@amd.com></a><br> <br> I'm not sure how a "broadcast read" is supposed to work? I can only see<br> the register specs talking about broadcast in connection with writes.<br> <br> <br> -- <br> Earthling Michel Dänzer | <a href="http://www.amd.com" id="LPlnk365128" previewremoved="true"> http://www.amd.com</a> <div id="LPBorder_GT_14761814794940.12544022877196426" style="margin-bottom:20px; overflow:auto; width:100%; text-indent:0px" contenteditable="false"> <table id="LPContainer_14761814794910.48081554222867373" cellspacing="0" style="width:90%; background-color:rgb(255,255,255); overflow:auto; padding-top:20px; padding-bottom:20px; margin-top:20px; border-top:1px dotted rgb(200,200,200); border-bottom:1px dotted rgb(200,200,200)"> <tbody> <tr valign="top" style="border-spacing:0px"> <td id="TextCell_14761814794930.6330030561431497" colspan="2" style="vertical-align:top; padding:0px; display:table-cell"> <div id="LPTitle_14761814794930.0860209784141206" style=""><a id="LPUrlAnchor_14761814794930.01359389598361771" href="http://www.amd.com/" target="_blank" style="text-decoration:none">Graphics, Processors and Immersive VR Solutions | AMD </a></div> <div id="LPMetadata_14761814794940.4677118614629565" style=""><a class="moz-txt-link-abbreviated" href="http://www.amd.com">www.amd.com</a></div> <div id="LPDescription_14761814794940.37923242485275344" style="display:block; color:rgb(102,102,102); font-weight:normal; font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif; font-size:14px; line-height:20px; max-height:100px; overflow:hidden"> Explore a wide range of innovative next generation computing processors, graphics, and Immersive VR solutions by Advanced Micro Devices (AMD). 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