Hi Bin,
On 08.07.2016 11:22, Bin Meng wrote:
On Fri, Jul 8, 2016 at 4:44 PM, Stefan Roese sr@denx.de wrote:
Hi Bin,
On 08.07.2016 04:27, Bin Meng wrote:
On Thu, Jul 7, 2016 at 11:52 PM, Stefan Roese sr@denx.de wrote:
Hi!
I do have BayTrail / FSP related question. I'm currently trying to use a DFI QSeven SoM which has one x4 PCIe slot instead of the usual 4 x1 slots. So all 4 PCIe lanes are used by the first PCIe controller. With the current U-Boot, all 4 PCIe controllers are enabled by the FSP :
00:1c.0 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 1 (rev 11) 00:1c.1 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 2 (rev 11) 00:1c.2 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 3 (rev 11) 00:1c.3 PCI bridge: Intel Corporation Atom Processor E3800 Series PCI Express Root Port 4 (rev 11)
In this configuration, the x4 PCIe card that is installed in the PCIe slot is not detected. The system always generated hotplug events for all for ports, but the link is not established.
The original DFI BIOS only enables the first PCIe controller. The controllers 1...3 are not visible via lspci. Here the 4x link is established and the 4x PCIe card is detected correctly.
My question now is, how can I enable this 4x link on the first PCIe controller via U-Boot / FSP? I have found no option on how to configure the PCIe controllers in the FSP dts properties. So that only the first controller is enabled and visible via lspci etc. The BayTrail datasheet mentions this to configure the PCIe setup in chapter "23.2.1 Root Port Configurations":
" Root port configurations are set by SoftStraps stored in SPI flash, and the default option is “(4) x1”. Links for each root port will train automatically to the maximum possible for each port. "
Correct. It's determined by the soft strap value in the SPI flash, to be specific, in the descriptor.bin.
Thanks.
I'm still wondering, if there isn't any documentation about these soft-strap values that are stored in the SPI flash for this Atom SoC. Does someone have a link to such a document? Or any further infos? Can the values be simply changed in the binary image, or is there some sort of CRC on the image that will fail after such a change?
Just checked the datasheet, other than the description you quoted in preivous thread, no detailed info regarding to this soft-strap values. Looks there is no public document that has such info.
Where is this SoftStraps in the SPI flash located? I've found this page mentioning that its a offset 0x100:
https://embedded.communities.intel.com/thread/8539
But I fail to find any documentation for all those Soft-Strap Registers / Values in the SPI flash. Does anyone have some further infos / documentation on this? How to enable 4x PCIe lanes for one PCIe controller on BayTrail / Atom?
Please try this:
If you have the original DFI BIOS, extract the descriptor.bin using U-Boot's ifdtool (ifdtool -x dfi_bios), and use this descriptor.bin to generate u-boot.rom. Or if you don't have the original DFI BIOS, dump it using Dediprog SF100, and do the same.
Thanks.
I do have the original BIOS. And with its descriptor.bin I get the following compilation error:
Region Intel ME is 3141632(0x2ff000) bytes. File is 5238784(0x4ff000) bytes. Not injecting. Makefile:1070: recipe for target 'u-boot.rom' failed make: *** [u-boot.rom] Error 1
This indicates the original BIOS's descriptor.bin defines a smaller me.bin than what you are using.
When I now also use the extracted me.bin to replace the one that I'm currently using, u-boot.rom can be built just fine. But unfortunately it does not boot to the prompt. I can see some early debug output but that's it. I also tried to use the debug FSP version but with this compilation fails with this error:
By early debug output, do you mean: U-Boot's debug UART output? At which point does it hang?
Output file is too small. (8388608 < 8421376) Makefile:1070: recipe for target 'u-boot.rom' failed make: *** [u-boot.rom] Error 1
This indicates the debug version FSP has larger size so that u-boot.rom does not fit.
Has someone been able to use the FSP debug version? Bin, do you know how this can be integrated without this image size overflow? And which UART will be used by this FSP debug?
If you are using debug version FSP, please adjust the CONFIG_FSP_ADDR=0xfffb0000.
Ah, okay. This info was missing. Is this documented somewhere? If not, could you please add this to the x86 README? Or I'll send a patch for this next week.
The debug FSP uses the SoC integrated legacy UART for the debug output.
Please find below the output of the debug FSP:
FSP Got Notification. Notification Value : 0x00000020 FSP Post PCI Enumeration ... Install PPI: 30CFE3E7-3DE1-4586-BE20-DEABA1B3B793 Notify: PPI Guid: 30CFE3E7-3DE1-4586-BE20-DEABA1B3B793, Peim notify entry point: 7B797CEA PchReadyToBootEvent() Start PciERWORegInit() Start PciERWORegInit() End PchReadyToBootEvent() End Setting baudrate for SIO HS UART... FSP Got Notification. Notification Value : 0x00000040 FSP Ready To Boot ... Install PPI: 7CE88FB3-4BD7-4679-87A8-A8D8DEE50D2B Notify: PPI Guid: 7CE88FB3-4BD7-4679-87A8-A8D8DEE50D2B, Peim notify entry point: 7B79802F PchInitExitBootCallback() Start LockPciDevCap() BusNumber = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x0,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE0000000 LockPciDevCap() StatusReg = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x2,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE0010000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0xD0 LockPciDevCap() While CAPBILITY = 0x9001 LockPciDevCap() While CapId = 0x90 LockPciDevCap() While CAPBILITY = 0xB005 LockPciDevCap() While CapId = 0xB0 LockPciDevCap() While CAPBILITY = 0x9 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x11,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE0088000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x12,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE0090000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x13,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE0098000 LockPciDevCap() StatusReg = 0x2B0 LockPciDevCap() StatusReg = 0x2B0 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x7005 LockPciDevCap() While CapId = 0x70 LockPciDevCap() While CAPBILITY = 0xA801 LockPciDevCap() While CapId = 0xA8 LockPciDevCap() While CAPBILITY = 0x12 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x15,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00A8000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x16,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00B0000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x17,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00B8000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1C,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00E0000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x40 LockPciDevCap() While CAPBILITY = 0x8010 LockPciDevCap() While CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x9005 LockPciDevCap() While CapId = 0x90 LockPciDevCap() While CAPBILITY = 0xA00D LockPciDevCap() While CapId = 0xA0 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1D,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00E8000 LockPciDevCap() StatusReg = 0x290 LockPciDevCap() StatusReg = 0x290 LockPciDevCap() CapId = 0x50 LockPciDevCap() While CAPBILITY = 0x5801 LockPciDevCap() While CapId = 0x58 LockPciDevCap() While CAPBILITY = 0x980A LockPciDevCap() While CapId = 0x98 LockPciDevCap() While CAPBILITY = 0x13 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00F0000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x1 LockPciDevCap() PciEAddressBase = 0xE00F1000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x2 LockPciDevCap() PciEAddressBase = 0xE00F2000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x3 LockPciDevCap() PciEAddressBase = 0xE00F3000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x4 LockPciDevCap() PciEAddressBase = 0xE00F4000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1E,Func = 0x5 LockPciDevCap() PciEAddressBase = 0xE00F5000 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() StatusReg = 0x10 LockPciDevCap() CapId = 0x80 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1F,Func = 0x0 LockPciDevCap() PciEAddressBase = 0xE00F8000 LockPciDevCap() StatusReg = 0x210 LockPciDevCap() StatusReg = 0x210 LockPciDevCap() CapId = 0xE0 LockPciDevCap() While CAPBILITY = 0x9 LockPciDevCap() While CapId = 0x0 LockPciDevCap() Bus = 0x0,Dev = 0x1F,Func = 0x3 LockPciDevCap() PciEAddressBase = 0xE00FB000 LockPciDevCap() StatusReg = 0x290 LockPciDevCap() StatusReg = 0x290 LockPciDevCap() CapId = 0x50 LockPciDevCap() While CAPBILITY = 0x1 LockPciDevCap() While CapId = 0x0 ConfigureMiscAtBoot() Start ConfigureMiscAtBoot() End ConfigureLpeAtBoot() Start ConfigureLpeAtBoot() End ConfigureOtgAtBoot() Start ConfigureOtgAtBoot() End ConfigureLpssAtBoot() Start ConfigureLpssAtBoot() End ConfigureSccAtBoot() Start Using eMMC 4.5 Overwrite the nslew/pslew -> 0 ConfigureSccAtBoot() End ConfigureXhciAtBoot() Start ConfigureXhciAtBoot() End PchInitExitBootCallback() End Notify: PPI Guid: 7CE88FB3-4BD7-4679-87A8-A8D8DEE50D2B, Peim notify entry point: 7B7C0619 Notify: PPI Guid: 7CE88FB3-4BD7-4679-87A8-A8D8DEE50D2B, Peim notify entry point: 7B781876 MP ReadyToBootEvent() Detected 4 CPU threads Install PPI: 605EA650-C65C-42E1-BA80-91A52AB618C6 ============= PEIM FSP is Completed =============
Thats all. Nothing after this. Can you see some problems with this debug FSP output? Helping us to get this U-Boot version with this updated flash descriptor binary running?
Thanks, Stefan