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<p class="msipheadera92f4c5c" style="margin:0in"><span style="font-family:"Arial",sans-serif;color:#0078D7">[AMD Official Use Only - Internal Distribution Only]</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">DBus interface and Phosphor-postcode-manager are equipped to handle 64 bit raw data.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">However, phosphor-host-postd in its current form reads only 8 bits as you mentioned from LPC snoop port, which needs to be extended to read more
than 8 bits.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Also, it is desirable to have capability to not just read the LPC snoop port(s), but also it should also be able to read from PLDM terminus with
scope for extension to read from other device paths.(if necessary based on platform design)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">May be a wrapper over the phosphor-host-postd (which will be LPC snoop reading application), some other application(s) to read from various other
device paths can be an option.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Further, I think the original idea from Manoj was to display this progress code via the standard interfaces like
<b>GUI</b> control panel, AFAIK, this is not present with current UI.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Right now, We(AMD) are extending the GUI by just adding state sensor which displays the last value in Sensors page with future expansion to add a
link to /var/lib/<phosphor-postcode-manager>/currrentbootIndex file to <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">get the entire post codes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Supreeth<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> chunhui.jia <chunhui.jia@linux.intel.com>
<br>
<b>Sent:</b> Sunday, January 24, 2021 8:24 PM<br>
<b>To:</b> Patrick Williams <patrick@stwcx.xyz>; Venkatesh, Supreeth <Supreeth.Venkatesh@amd.com><br>
<b>Cc:</b> openbmc <openbmc@lists.ozlabs.org><br>
<b>Subject:</b> Re: Re: Progress Codes in BMC<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">[CAUTION: External Email]
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Patrick, Deepak,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black">Current post code is stored as 64bits although data from HW is 8bits. It should be enough to host. With said, we don't need to extend as it is already 64bits.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><a href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fopenbmc%2Fphosphor-dbus-interfaces%2Fblob%2Fmaster%2Fxyz%2Fopenbmc_project%2FState%2FBoot%2FRaw.interface.yaml%23L6&data=04%7C01%7Csupreeth.venkatesh%40amd.com%7Ce3e9a73c11f448affeb508d8c0d856e6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637471382696079136%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=oZMT2egLjtk76X6qhck1XFppvcFfcN58nuXnRd%2BnZDc%3D&reserved=0">https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/xyz/openbmc_project/State/Boot/Raw.interface.yaml#L6</a>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><a href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fopenbmc%2Fphosphor-dbus-interfaces%2Fblob%2Fmaster%2Fxyz%2Fopenbmc_project%2FState%2FBoot%2FPostCode.interface.yaml%23L45&data=04%7C01%7Csupreeth.venkatesh%40amd.com%7Ce3e9a73c11f448affeb508d8c0d856e6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637471382696089131%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ojTEgHx9oHCC6ro0rNW0o3wjCxuCBPchjjtb41S7Tmg%3D&reserved=0">https://github.com/openbmc/phosphor-dbus-interfaces/blob/master/xyz/openbmc_project/State/Boot/PostCode.interface.yaml#L45</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:silver">2021-01-25
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:silver">chunhui.jia
<o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">发件人：</span></strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Patrick Williams <<a href="mailto:patrick@stwcx.xyz">patrick@stwcx.xyz</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">发送时间：</span></strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">2021-01-22 22:52<o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">主题：</span></strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Re: Progress Codes in BMC<o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">收件人：</span></strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">"Supreeth Venkatesh"<<a href="mailto:supreeth.venkatesh@amd.com">supreeth.venkatesh@amd.com</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><strong><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">抄送：</span></strong><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">"openbmc"<<a href="mailto:openbmc@lists.ozlabs.org">openbmc@lists.ozlabs.org</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">On Fri, Jan 22, 2021 at 08:18:29AM -0600, Supreeth Venkatesh wrote: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> On 1/22/21 6:32 AM, Deepak Kodihalli wrote: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> > On Fri, Jan 22, 2021 at 5:25 PM manoj kiran <<a href="mailto:manojkiran.eda@gmail.com">manojkiran.eda@gmail.com</a>> wrote: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> > Maybe some of the apps I pointed above can be extended for this <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> > purpose, but I'm yet to take a closer look. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> One of the deviations on AMD platforms is that POST code is usually 32 bit code. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> I did extend phosphor-host-postd to read 32 bit codes and added experimental associated driver in Linux, as LPC ports supported is only two. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">> However, it is far from production quality code at this point. We can definitely collaborate on this to arrive at a generic solution. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I was also going to point to the postcode daemons as a good starting <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">point. On Intel platforms, the postcodes are typically 1 byte. The <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">previous postcode daemon got its data from the LPC "port 80" mechanism, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">but Facebook/HCL recently extended it to support multi-host and to be <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">able to consume postcodes from an IPMB end-point (which is how we talk <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">to our per-host microcontroller). <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I think it should be fairly straight-forward to add a new mechanism to <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">pick up data from PLDM or whatever your path is on Power. The daemons <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">in question here already support keeping a history as well. I think the <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">only think you'd need to do is extend it to be 32-bit or 64-bit progress <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">codes instead of just 8-bit, but I see no reason why that shouldn't be <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">acceptable. It sounds like Supreeth might even have some code as a <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">starting point? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">(Supreeth maybe you can throw up anything you've done to the postcode <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">daemons into Gerrit as a starting point?) <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">-- <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Patrick Williams <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <o:p></o:p></span></p>
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