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RYeun
Beginner
1,785 Views

Access Xeon D 10G-KR PHY registers

We use Xeon D in our latest hardware. After reading and searching datasheet, Volume-4 for D-1500 Product Family, we'd like to inquire about the following -

1. We would like to check 64B/66B PCS coding errors. Presumably, this is defined among PHY registers. Unfortunately we couldn't locate the register spec. Could you please point out where we could get it (Intel document, or IEEE802.3 standard)? Please provide enough details so we could get to the document.

2. Are these registers accessed via PCIe address space via the PHY_INDIRECT access DATA/CTRL registers (0x11144, 0x11148), or MDIO (clause 45?)?

3. There is a mentioning of PHY register bit 3.8.B, or 3.EC00.F. How should we interpret each of the (apparent) 3 data fields?

Thanks,

Raymond

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8 Replies
CarlosAM_INTEL
Moderator
256 Views

Hello, rksyeung:

Thank you for contacting Intel Embedded Community.

In order to be on the same page, could you please give us the SKUs and part numbers of the processors related to your questions?

Could you please tell us if your design has been reviewed by Intel?

Could you please let us know the name of the company that you are working for?

Waiting for your answers to these questions.

Best regards,

Carlos_A.

RYeun
Beginner
256 Views

model name: Intel Xeon CPU D-1527 @ 2.20GHz

Microcode: 0x700000d

Stepping: 3

My question pertains to the internal of Intel's processor internal registers. I work in software group, so I'm not sure if the hardware design has been reviewed by Intel, though don't know why this is relevant. I'm not asking about any issues we encounter at this point at board level, such that unapproved design could cause problem. The question is about some PHY registers referenced in Intel's data sheet that couldn't be found within such data sheet.

I'm also not sure why the company I work for is relevant here either. Perhaps I'd filed it as part of my personal profile when I signed up for this community. If not, I'd like to keep this private at this moment. I could respond to you in private if this is absolutely necessary.

Thanks,

Raymond

RYeun
Beginner
256 Views

Incidentally, the PHY I refer to is an internal (to Xeon-D's 10G controller) PHY. You could reference Figure 15.1 of the data sheet for D-1500 Product Family (volume 4). My questions are not concerned about external components/interfaces.

CarlosAM_INTEL
Moderator
256 Views

Hello, rksyeung:

Thanks for your updates.

In order to help you, we will contact you via email.

Best regards,

Carlos_A.

Gabriel_T_Intel
Employee
256 Views

Hello, Raymond,

Please refer to the document number 546625 - Broadwell Server - BIOS Writer's Guide (BWG).

The BIOS mailbox commands are:

Section 4.3.3.2 - Write_PCS (0x02): This command functions as a BIOS interface to the PECI mailbox WR_CTRL_TABLE command.

As input, BIOS passes the PCS command and address in the ADDRESS field of the INTERFACE register.

Section 4.3.3.3 - Read_PCS (0x03): This command functions as a BIOS interface to the PECI mailbox RD_CTRL_TABLE command.

As input, BIOS passes the PCS command and address in the ADDRESS field of the INTERFACE register. As output, Pcode passes the value/result of the requested read in the DATA register.

The return data and error codes are the same ones that would be returned by the PECI mailbox for the provided command and data.

RdPkgConfig() command provides read access to the package configuration space (PCS) within the processor, including various power and thermal management functions. Typical PCS read services supported by the processor may include access to temperature data, energy status, run-time information, DIMM temperatures and so on.

The RdPkgConfig() format is as follows: Read/Write Length: 0x05.

Command: 0xA1

For further details please check doc 527063 - Platform Environment Control Interface (PECI) for Broadwell Processor - Implementation Guide.

Section 3.4.1 - Command Format.

WrPkgConfig() command provides write access to the package configuration space (PCS) within the processor, including various power and thermal management functions. Typical PCS write services supported by the processor may include power limiting, thermal averaging constant programming and so on.

The WrPkgConfig() format is as follows: Read Length: 0x01; Write Length: 0x0A; Command: 0xA5; AW FCS Support: yes.

For further details please check doc 527063 - Platform Environment Control Interface (PECI) for Broadwell Processor - Implementation Guide.

Section 3.5 - WrPkgConfig ().

Please refer to Sections, Doc 544040 - EDS Vol 1

9.3.2 - Power and Thermal Optimization Capabilities Package Config Space (PCS).

9.3.3 - Register and State Dump Package Config Space (PCS).

Table 43 - RdPkgConfig () and WrPkgConfig () PCS SoC and Dram Optimization Services Summary.

Regards,

Gabriel Thomas G.

RYeun
Beginner
256 Views

Hi Gabriel,

Thanks for the BIOS information. However, what I need is not this. I'm anticipating a need to do debugging (at PHY level) in Linux environment. Please review my very first post here. I found IEEE 802.3 Specification covering Clause 45 register space. However, I'm not clear if Intel fully complies with it, and whether the vendor-specific section has information we want.

Finally, I attempted to download document 546625, but got "Not Authorized to Access" when I provided same credential I used for this embedded community. If you're to provide any further downloadable document, what do I need to do (get another Intel account) to get access?

Thanks,

 

Raymond
CarlosAM_INTEL
Moderator
256 Views

Hello, rksyeung:

Thanks for your update.

Your Resource & Design Center (RDC) privileged account should be requested by filling out the https://www.intel.com/content/www/us/en/forms/design/contact-support.html RDC Account Support form.

We suggest you use a business email address to evade any inconvenience. Please avoid the free email provider's address (such the provided by Hotmail, Gmail, Yahoo, or others).

We hope that this information may help you.

Best regards,

Carlos_A.

JDood
Novice
256 Views

Hi Raymond,

Ircona are a world leading design services company specialising in x86 hardware and BIOS design. We have completed a number of projects based on the Intel Broadwell-DE and would be more than happy to assist you in resolving your issues. Please contact me at mailto:john.doody@ircona.com john.doody@ircona.com if you would like to discuss this further.

Thanks

John Doody

CEO

Ircona

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