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diff --git a/Documentation/mainboard/ocp/deltalake.md b/Documentation/mainboard/ocp/deltalake.md new file mode 100644 index 0000000000..c4c3284b8f --- /dev/null +++ b/Documentation/mainboard/ocp/deltalake.md @@ -0,0 +1,128 @@ +# OCP Delta Lake + +This page describes coreboot support status for the [OCP] (Open Compute Project) +Delta Lake server platform. + +## Introduction + +OCP Delta Lake server platform is a component of multi-host server system +Yosemite-V3. Both were announced by Facebook and Intel in [OCP virtual summit 2020]. + +Delta Lake server is a single socket Cooper Lake Scalable Processor server. + +Yosemite-V3 has multiple configurations. Depending on configurations, it may +host up to 4 Delta Lake servers in one sled. + +Yosemite-V3 and Delta Lake are currently in DVT phase. Facebook, Intel and partners +jointly develop FSP/coreboot/LinuxBoot stack on Delta Lake as an alternative solution. + +## Required blobs + +This board currently requires: +- FSP blob: The blob (Intel Cooper Lake Scalable Processor Firmware Support Package) + is not yet available to the public. It will be made public some time after the MP + (Mass Production) of CooperLake Scalable Processor when the FSP is mature. +- Microcode: Not yet available to the public. +- ME binary: Not yet available to the public. + +## Payload +- LinuxBoot: This is necessary only if you use LinuxBoot as coreboot payload. + U-root as initramfs, is used in the joint development. It can be built + following [All about u-root]. + +## Flashing coreboot + +To do in-band FW image update, use [flashrom]: + flashrom -p internal:ich_spi_mode=hwseq -c "Opaque flash chip" --ifd \ + -i bios --noverify-all -w <path to coreboot image> + +From OpenBMC, to update FW image: + fw-util slotx --update bios <path to coreboot image> + +To power off/on the host: + power-util slotx off + power-util slotx on + +To connect to console through SOL (Serial Over Lan): + sol-util slotx + +## Working features +The solution is developed using LinuxBoot payload with Linux kernel 5.2.9, and [u-root] +as initramfs. +- SMBIOS: + - Type 0 -- BIOS Information + - Type 1 -- System Information + - Type 2 -- Baseboard Information + - Type 3 -- System Enclosure or Chassis + - Type 4 -- Processor Information + - Type 8 -- Port Connector Information + - Type 9 -- PCI Slot Information + - Type 11 -- OEM String + - Type 13 -- BIOS Language Information + - Type 16 -- Physical Memory Array + - Type 19 -- Memory Array Mapped Address + - Type 127 -- End-of-Table + +- BMC integration: + - BMC readiness check + - IPMI commands + - watchdog timer + - POST complete pin acknowledgement +- SEL record generation +- Early serial output +- port 80h direct to GPIO +- ACPI tables: APIC/DSDT/FACP/FACS/HPET/MCFG/SPMI/SRAT/SLIT/SSDT +- Skipping memory training upon subsequent reboots by using MRC cache +- BMC crash dump +- Error injection through ITP + +## Firmware configurations +[ChromeOS VPD] is used to store most of the firmware configurations. +RO_VPD region holds default values, while RW_VPD region holds customized +values. + +VPD variables supported are: +- firmware_version: This variable holds overall firmware version. coreboot + uses that value to populate smbios type 1 version field. + +## Known issues +- Even though CPX-SP FSP is based on FSP 2.2 framework, it does not + support FSP_USES_CB_STACK. An IPS ticket is filed with Intel. +- VT-d is not supported. An IPS ticket is filed with Intel. +- PCIe bifuration is not supported. An IPS ticket is filed with Intel. +- ME based power capping. This is a bug in ME. An IPS ticket is filed + with Intel. +- RO_VPD region as well as other RO regions are not write protected. +- HECI is not set up correctly, so BMC is not able to get PCH and DIMM + temperature sensor readings. + +## Feature gaps +- Delta Lake DVT is not supported, as we only have Delta Lake EVT servers + at the moment. +- SMBIOS: + - Type 7 -- Cache Information + - Type 17 -- Memory Device + - Type 38 -- IPMI Device Information + - Type 41 -- Onboard Devices Extended Information +- ACPI: + - DMAR +- PFR/CBnT + +## Technology + +```eval_rst ++------------------------+---------------------------------------------+ +| Processor (1 socket) | Intel Cooper Lake Scalable Processor | ++------------------------+---------------------------------------------+ +| BMC | Aspeed AST 2500 | ++------------------------+---------------------------------------------+ +| PCH | Intel Lewisburg C621 | ++------------------------+---------------------------------------------+ +``` + +[OCP]: https://www.opencompute.org +[OCP virtual summit 2020]: https://www.opencompute.org/summit/virtual-summit/schedule +[flashrom]: https://flashrom.org/Flashrom +[All about u-root]: https://github.com/linuxboot/book/tree/master/u-root +[u-root]: https://u-root.org/ +[ChromeOS VPD]: https://chromium.googlesource.com/chromiumos/platform/vpd/+/master/README.md |