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<div class="WordSection1">
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D">OK, now I understand what you are saying but I don’t think the spec is clear enough either way to make a black and white decision (and I bet of the 3
IHV boards I have access to, there’s at least 1 that behaves differently than the other 2 in this regard).<o:p></o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D">I have a plane to catch so will think about this overnight.<span style="mso-spacerun:yes">
</span><o:p></o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D">I’d welcome other comments/opinions as well and thanks everyone so far for the
<span class="SpellE">inpits</span>!<o:p></o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="Default"><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;color:#1F497D">Paul</span></font><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman"">
Karthik_Rajagopalan@Dell.com [mailto:Karthik_Rajagopalan@Dell.com] <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 4:58 PM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; Verma, Vishal L; Alex.Chang@idt.com; nvmewin@lists.openfabrics.org<br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">Setting CC.EN to 0 will satisfy the 1</span></font><font size="2" color="#1f497d" face="Wingdings"><span style="font-size:10.0pt;font-family:Wingdings;color:#1F497D">à</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D">0
transition.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">>To your immediate email: I don’t know what you’re trying to say<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">What I’ve removed in the patch is the 0</span></font><font size="2" color="#1f497d" face="Wingdings"><span style="font-size:10.0pt;font-family:Wingdings;color:#1F497D">à</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D">1
transition… per the spec it can happen only after we’ve setup the AQA, ASQ, ACQ entries in MMIO (EnableAdapter). <o:p></o:p></span></font></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;mso-fareast-font-family:Calibri;color:#1F497D"><span style="mso-list:Ignore">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman"">
</span></font></span></span></font><![endif]><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D">Otherwise, the controller
<b><span style="font-weight:bold">doesn’t have to set STS.RDY</span></b> – so we’ll in fact be waiting forever for RDY<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Luse, Paul E <a href="mailto:[mailto:paul.e.luse@intel.com]">[mailto:paul.e.luse@intel.com]</a>
<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 6:47 PM<br>
<b><span style="font-weight:bold">To:</span></b> Rajagopalan, Karthik; Verma, Vishal L;
<a href="mailto:Alex.Chang@idt.com">Alex.Chang@idt.com</a>; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">To your immediate email: I don’t know what you’re trying to say<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">To your email before that:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">You realize that’s what’s in the patch I sent out initially right? We’ve come full circle here, Alex suggested that I add a wait for RDY just before
setting to 0 as we don’t know if its safe to set to 0 yet and then further suggested the RDY check instead of EN to avoid having to deal with what we do if RDY never comes up. Additionally, this approach does not reset the card at startup. If its 0 to being
with, we simply move it to 1 which you would *<b><span style="font-weight:bold">assume</span></b>* it OK but I have at least one IHV report that its not good enough, a 1</span></font><font size="2" color="#1f497d" face="Wingdings"><span style="font-size:10.0pt;font-family:Wingdings;color:#1F497D">à</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D">0
transition is needed at init.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">So, I still think this is the most generic and safest:<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">IF EN == 0 {</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Set EN to 1 (all others zero) */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 1;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">WAIT ON RDY<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">}</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Now reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:Karthik_Rajagopalan@Dell.com">Karthik_Rajagopalan@Dell.com</a> <a href="mailto:[mailto:Karthik_Rajagopalan@Dell.com]">
[mailto:Karthik_Rajagopalan@Dell.com]</a> <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 4:43 PM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; Verma, Vishal L; <a href="mailto:Alex.Chang@idt.com">
Alex.Chang@idt.com</a>; <a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">BTW, here’s what the spec says for CC.EN<o:p></o:p></span></font></p>
<p class="MsoNormal" style="text-autospace:none"><font size="1" color="black" face="Arial"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:black">When this field is set to ‘1’, the controller sets CSTS.RDY to ‘1’ when it is ready to process
commands. <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">I read it as “set CC.EN to 1 after setting up the admin-queues, otherwise RDY will *<b><span style="font-weight:bold">not</span></b>* be 1”<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Rajagopalan, Karthik <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 6:32 PM<br>
<b><span style="font-weight:bold">To:</span></b> 'Luse, Paul E'; Verma, Vishal L;
<a href="mailto:Alex.Chang@idt.com">Alex.Chang@idt.com</a>; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">Yep
</span></font><font color="#1f497d" face="Wingdings"><span style="font-family:Wingdings;color:#1F497D">J</span></font><font color="#1f497d"><span style="color:#1F497D"> but I think it doesn’t have to be so – all we need to do is an unconditional (attempt) to
reset.. we don’t set CC.EN to 1 until we’re ready to enable the controller.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">Here are the possibilities when we try to reset:<o:p></o:p></span></font></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo4"><![if !supportLists]><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;mso-fareast-font-family:Calibri;color:#1F497D"><span style="mso-list:Ignore">1.<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman"">
</span></font></span></span></font><![endif]><font color="#1f497d"><span style="color:#1F497D">CC.EN is 0 to begin with => no need to reset; but setting it again to 0 should be a NOP<o:p></o:p></span></font></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo4"><![if !supportLists]><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;mso-fareast-font-family:Calibri;color:#1F497D"><span style="mso-list:Ignore">2.<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman"">
</span></font></span></span></font><![endif]><font color="#1f497d"><span style="color:#1F497D">CC.EN is 1 to begin with => need to reset; we didn’t wiggle this yet, so STS.RDY should be 1; setting EN to 0 will actually reset<o:p></o:p></span></font></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo4">
<![if !supportLists]><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;mso-fareast-font-family:Calibri;color:#1F497D"><span style="mso-list:Ignore">a.<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman"">
</span></font></span></span></font><![endif]><font color="#1f497d"><span style="color:#1F497D">The original issue you mention could still happen if STS.RDY stayed 0 (bad controller IMHO); still goodness in trying to reset<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">Here’s a patch in case you want to try this approach…
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Luse, Paul E <a href="mailto:[mailto:paul.e.luse@intel.com]">[mailto:paul.e.luse@intel.com]</a>
<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 6:22 PM<br>
<b><span style="font-weight:bold">To:</span></b> Rajagopalan, Karthik; Verma, Vishal L;
<a href="mailto:Alex.Chang@idt.com">Alex.Chang@idt.com</a>; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">0 doesn’t reset unless it was previously 1… that’s why the initial implementation set it to 1, then 0 to force reset then init happened. The question
came in about setting it to 0 right after setting it to 1, anytime you transition to 1 you need to wait for RDY so the code I proposed last will always reset but only for a 2<sup>nd</sup> wait on RDY (there’s one after we enable as part of init) if the controller
wasn’t disabled when we started. Hard to believe something so simple can be so convoluted isn’t it?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:Karthik_Rajagopalan@Dell.com">Karthik_Rajagopalan@Dell.com</a> <a href="mailto:[mailto:Karthik_Rajagopalan@Dell.com]">
[mailto:Karthik_Rajagopalan@Dell.com]</a> <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 4:11 PM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; Verma, Vishal L; <a href="mailto:Alex.Chang@idt.com">
Alex.Chang@idt.com</a>; <a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">Why not unconditionally set CC.EN to 0 as soon as the driver loads ?<o:p></o:p></span></font></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo6"><![if !supportLists]><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;mso-fareast-font-family:Calibri;color:#1F497D"><span style="mso-list:Ignore">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman"">
</span></font></span></span></font><![endif]><font color="#1f497d"><span style="color:#1F497D">There will be an issue with this iff someone before (opROM, UEFI ?) had set CC.EN to 1 & somehow STS.RDY never went to 1… but things still continued (unlikely)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D">i.e.,
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Disable / Reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Set EN to 1 (all others zero) */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 1;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Wait for RDY */<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:nvmewin-bounces@lists.openfabrics.org">nvmewin-bounces@lists.openfabrics.org</a>
<a href="mailto:[mailto:nvmewin-bounces@lists.openfabrics.org]">[mailto:nvmewin-bounces@lists.openfabrics.org]</a>
<b><span style="font-weight:bold">On Behalf Of </span></b>Luse, Paul E<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 5:59 PM<br>
<b><span style="font-weight:bold">To:</span></b> Verma, Vishal L; Chang, Alex; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">So maybe a better proposal for this section of code… go back to what we had before (sorta) but include a wait on RDY after setting EN to 1 and only
set EN to 1 if its zero to start. This is the most generic soln and since the behavior of the HW at this detailed level isn’t specified we can call this the least common denominator and if IHVs want to optimize for their implementations they can. If this
first RDY wait files, then we fail driver init. This code assures we always reset and we never touch EN after setting it to 1 without waiting for RDY<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">IF EN == 0 {</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Set EN to 1 (all others zero) */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 1;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">WAIT ON RDY<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D;background:yellow;mso-highlight:yellow">}</span></font><font size="2" color="#1f497d"><span style="font-size:10.0pt;color:#1F497D"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Now reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Luse, Paul E <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 3:21 PM<br>
<b><span style="font-weight:bold">To:</span></b> Verma, Vishal L; Chang, Alex; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: [nvmewin] patch review status<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">I was thinking about that too… If EN was already 1 and we caught RDY before it was 0 then we would indeed set EN to 1 again (possibly before, during
or after RDY is set). The spec, of course, does not dictate behavior in this case but one would assume it would be treated as a NOP and our init state machine would properly wait for RDY. I’m not a HW guy though, anyone else have a comment/concern on setting
EN to 1 if tis already 1?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Verma, Vishal L <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 1:46 PM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; Chang, Alex; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [nvmewin] patch review status<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" face="Calibri"><span style="font-size:11.0pt"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black">Paul,<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black">Is this correct though?<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black">Making CC.EN 0 implies that RDY will become 0, but RDY being 0 does not guarantee that CC.EN is 0.<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black">If what I'm thinking is right, we could be in a state where CC.EN was 1 when the driver comes up, but the controller never became ready. In this case
we will think everything is alright, and we will try to make CC.EN 1 again – Which is not something we'd want to do, right?<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black">Vishal<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black;font-weight:bold">From:
</span></font></b><font color="black"><span style="color:black"><Luse>, Paul E <<a href="mailto:paul.e.luse@intel.com">paul.e.luse@intel.com</a>><br>
<b><span style="font-weight:bold">Date: </span></b>Wednesday, August 15, 2012 11:43 AM<br>
<b><span style="font-weight:bold">To: </span></b>"Chang, Alex" <<a href="mailto:Alex.Chang@idt.com">Alex.Chang@idt.com</a>>, "<a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a>" <<a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a>><br>
<b><span style="font-weight:bold">Subject: </span></b>Re: [nvmewin] patch review status<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">OK, I think I can get behind that. I was thinking STS might not be valid when EN is 0 but looking at the spec I think this is fine</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="Default"><b><font size="1" color="black" face="Arial"><span style="font-size:9.0pt;font-weight:bold">Ready (RDY):
</span></font></b><font size="1"><span style="font-size:9.0pt">This field is set to ‘1’ when the controller is ready to process commands after CC.EN is set to ‘1’. This field shall be cleared to ‘0’ when CC.EN is cleared to ‘0’. Commands shall not be issued
to the controller until this field is set to ‘1’ after the CC.EN bit is set to ‘1’. Failure to follow this requirement produces undefined results. Host software shall wait a minimum of CAP.TO seconds for this field to be set to ‘1’ after setting CC.EN to ‘1’
from a previous value of ‘0’. </span></font><o:p></o:p></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">So I’ll just chance the check below for EN == 1 to RDY == 1 then</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">Thanks!</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">Paul</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Chang, Alex [<a href="mailto:Alex.Chang@idt.com">mailto:Alex.Chang@idt.com</a>] <br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 10:21 AM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black"> </span></font><font size="2" color="black"><span style="font-size:10.0pt;color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Absolutely. Now, the tricky part is when CC.EN=1 and STS.RDY never becomes 1. I'd say simply check STS.RDY only. If it's
1, then reset the device, otherwise, skip resetting it. What do you think?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Thanks,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Alex</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<div class="MsoNormal" align="center" style="text-align:center"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman";color:black">
<hr size="3" width="100%" align="center">
</span></font></div>
<p class="MsoNormal" style="margin-bottom:12.0pt;mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Luse, Paul E <a href="mailto:[mailto:paul.e.luse@intel.com]">[mailto:paul.e.luse@intel.com]</a><br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 9:56 AM<br>
<b><span style="font-weight:bold">To:</span></b> Chang, Alex; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">OK, I see what you’re saying I think. We don’t want to check for RDY without first looking at EN so does this make sense:</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> if (CC.EN == 1) {</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">
<span style="background:yellow;mso-highlight:yellow">-- now wait for RDY -</span></span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Now reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> }</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Chang, Alex <a href="mailto:[mailto:Alex.Chang@idt.com]">[mailto:Alex.Chang@idt.com]</a><br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 9:52 AM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black"> </span></font><font size="2" color="black"><span style="font-size:10.0pt;color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Hi Paul,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">I agree with the new logic on #3. However, instead of checking CC.EN, should we check STS.RDY or both?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Thanks,<br>
Alex</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<div class="MsoNormal" align="center" style="text-align:center"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman";color:black">
<hr size="3" width="100%" align="center">
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<p class="MsoNormal" style="margin-bottom:12.0pt;mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Luse, Paul E <a href="mailto:[mailto:paul.e.luse@intel.com]">[mailto:paul.e.luse@intel.com]</a><br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 9:03 AM<br>
<b><span style="font-weight:bold">To:</span></b> Chang, Alex; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#984807" face="Calibri"><span style="font-size:10.0pt;color:#984807">Thanks Alex, see below.</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Chang, Alex <a href="mailto:[mailto:Alex.Chang@idt.com]">[mailto:Alex.Chang@idt.com]</a><br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 8:51 AM<br>
<b><span style="font-weight:bold">To:</span></b> Luse, Paul E; <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> RE: patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
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</div>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black"> </span></font><font size="2" color="black"><span style="font-size:10.0pt;color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Hi Paul,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Some questions after browsing the difference between current source and your changes:</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">1. Why you removed "CC.SHN = 1;" in NVMeNormalShutdown routine?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#984807" face="Calibri"><span style="font-size:10.0pt;color:#984807">PL> Good eye, that was a mistake. I’ll add it back before pushing</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="#1f497d" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">2. In nvme.h, why you changed the opcode of NVM_DATASET_MANAGEMENT from 0x06 to 0x09?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#984807" face="Calibri"><span style="font-size:10.0pt;color:#984807">PL> 6 was wrong, 9 is correct per spec</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">3. Is there any specific reason(s), you added the following in NVMeInitialize, and then immediately clear EN without checking
RDY = 1?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"> /* Set EN to 1 (all others zero) */<br>
CC.EN = 1;<br>
StorPortWriteRegisterUlong(pAE,<br>
(PULONG)(&pAE->pCtrlRegister->CC),<br>
CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#984807" face="Calibri"><span style="font-size:10.0pt;color:#984807">PL> I wrote this up in the patch submission and I can’t find that email right now. I didn’t add code, I changed code. Before, we use to set
EN to 1, read it back, and then set it to 0 to kick off a reset and then later we wait for RDY in the init state machine. We had an IHV complain that their implementation required waiting on RDY after setting EN 1 to even before clearing EN. So, our old
implementation was a problem. So what I did now is to not force a reset unless EN is set to 1 when we come in. If its set to 0 then either (a) we’re coming from power on or (b) the pre_OS reset the card when it was done. Either way if its already 0 then
we’re in a known state so we do nothing and then later we set to 1 and wait on RDY. If its 1 when we enter here we set to 0 and then later set to 1 and wait on RDY. Make sense? This assures we never enable without waiting for RDY</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">***** WAS *******</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Set EN to 1 (all others zero) */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 1;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Read it back */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong =</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortReadRegisterUlong(pAE, (PULONG)(&pAE->pCtrlRegister->CC));</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Now reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong =</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortReadRegisterUlong(pAE, (PULONG)(&pAE->pCtrlRegister->CC));</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D">*** NOW IS *******</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> if (CC.EN == 1) {</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> /* Now reset */</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.EN = 0;</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> StorPortWriteRegisterUlong(pAE,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> (PULONG)(&pAE->pCtrlRegister->CC),</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> CC.AsUlong);</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> }</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span style="font-size:10.0pt;color:#1F497D"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Thanks,</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="blue" face="Arial"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">Alex</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<div class="MsoNormal" align="center" style="text-align:center"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman";color:black">
<hr size="3" width="100%" align="center">
</span></font></div>
<p class="MsoNormal" style="margin-bottom:12.0pt;mso-outline-level:1"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><a href="mailto:nvmewin-bounces@lists.openfabrics.org">nvmewin-bounces@lists.openfabrics.org</a><a href="mailto:[mailto:nvmewin-bounces@lists.openfabrics.org]">[mailto:nvmewin-bounces@lists.openfabrics.org]</a><b><span style="font-weight:bold">On
Behalf Of </span></b>Luse, Paul E<br>
<b><span style="font-weight:bold">Sent:</span></b> Wednesday, August 15, 2012 8:12 AM<br>
<b><span style="font-weight:bold">To:</span></b> <a href="mailto:nvmewin@lists.openfabrics.org">
nvmewin@lists.openfabrics.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> [nvmewin] patch review status</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.0pt;color:black">Just checking in… any questions to date and how are folks tracking for completing their review by this Fri?</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.0pt;color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.0pt;color:black">Thx</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.0pt;color:black">Paul</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:10.0pt;color:black"> </span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">____________________________________</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Paul Luse<br>
Sr. Staff Engineer<br>
PCG Server Software Engineering <br>
Desk: 480.554.3688, Mobile: 480.334.4630</span></font><font color="black"><span style="color:black"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span style="font-size:11.0pt;color:black"> </span></font><font size="2" color="black"><span style="font-size:10.0pt;color:black"><o:p></o:p></span></font></p>
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