* PCIe communication at linux command in grub-core/loader/i386/linux.c
@ 2017-09-02 4:18 Arindam Khan
2017-09-02 4:23 ` Fwd: " Arindam Khan
0 siblings, 1 reply; 2+ messages in thread
From: Arindam Khan @ 2017-09-02 4:18 UTC (permalink / raw)
To: grub-devel
Hi,
I have a PCIe 4x card in PCIe slots, which does a communication to card, before “linux” command is loaded. I had an implementation of PCIe communication which perfectly works for BIOS based system. However, when i configure he GRUB2 for EFI system and install it, the same communication to PCIe board does not occur. It is not able to read/write BAR2 address and giving communication error.
I have following questions in this regard -
a) Is any changes in GRUB2 for UEFi system for PCIe communication
b) TLP packet generated for PCIe communication uses 32-bit or 64-bit address?. Because BIOS uses 32-bit address only for PCIe TLP.
with regards,
Arindam
^ permalink raw reply [flat|nested] 2+ messages in thread
* Fwd: PCIe communication at linux command in grub-core/loader/i386/linux.c
2017-09-02 4:18 PCIe communication at linux command in grub-core/loader/i386/linux.c Arindam Khan
@ 2017-09-02 4:23 ` Arindam Khan
0 siblings, 0 replies; 2+ messages in thread
From: Arindam Khan @ 2017-09-02 4:23 UTC (permalink / raw)
To: grub-devel
[-- Attachment #1: Type: text/plain, Size: 943 bytes --]
> Begin forwarded message:
>
> From: Arindam Khan <arindamkhan2003@gmail.com>
> Subject: PCIe communication at linux command in grub-core/loader/i386/linux.c
> Date: 2 September 2017 at 09:48:40 IST
> To: grub-devel@gnu.org
>
> Hi,
>
> I have a PCIe 4x card in PCIe slots, which does a communication to card, before “linux” command is loaded. I had an implementation of PCIe communication which perfectly works for BIOS based system. However, when i configure he GRUB2 for EFI system and install it, the same communication to PCIe board does not occur. It is not able to read/write BAR2 address and giving communication error.
>
>
> I have following questions in this regard -
> a) Is any changes in GRUB2 for UEFi system for PCIe communication
> b) TLP packet generated for PCIe communication uses 32-bit or 64-bit address?. Because BIOS uses 32-bit address only for PCIe TLP.
>
> with regards,
> Arindam
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-09-02 4:18 PCIe communication at linux command in grub-core/loader/i386/linux.c Arindam Khan
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